JPH0419908A - Paste for sliding electrode - Google Patents
Paste for sliding electrodeInfo
- Publication number
- JPH0419908A JPH0419908A JP12173290A JP12173290A JPH0419908A JP H0419908 A JPH0419908 A JP H0419908A JP 12173290 A JP12173290 A JP 12173290A JP 12173290 A JP12173290 A JP 12173290A JP H0419908 A JPH0419908 A JP H0419908A
- Authority
- JP
- Japan
- Prior art keywords
- spherical
- metal
- electrode paste
- odd
- glassy carbon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910021397 glassy carbon Inorganic materials 0.000 claims abstract description 25
- 239000005011 phenolic resin Substances 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 14
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000011230 binding agent Substances 0.000 claims abstract description 10
- 239000004020 conductor Substances 0.000 claims abstract description 7
- 239000012298 atmosphere Substances 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims description 38
- 239000002184 metal Substances 0.000 claims description 38
- 239000002003 electrode paste Substances 0.000 claims description 33
- 239000000919 ceramic Substances 0.000 claims description 18
- 239000000835 fiber Substances 0.000 claims description 17
- 239000000126 substance Substances 0.000 claims description 15
- 239000011324 bead Substances 0.000 claims description 10
- 239000011521 glass Substances 0.000 claims description 10
- 239000003365 glass fiber Substances 0.000 claims description 8
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 7
- 229920001568 phenolic resin Polymers 0.000 claims description 7
- 238000007747 plating Methods 0.000 claims description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 6
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- 238000010000 carbonizing Methods 0.000 claims description 2
- 239000002241 glass-ceramic Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract description 5
- 229910010272 inorganic material Inorganic materials 0.000 abstract description 3
- 239000011147 inorganic material Substances 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 5
- 239000011368 organic material Substances 0.000 abstract 1
- 150000002989 phenols Chemical class 0.000 abstract 1
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 36
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 18
- 239000000654 additive Substances 0.000 description 16
- 239000010408 film Substances 0.000 description 13
- 239000002518 antifoaming agent Substances 0.000 description 12
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 12
- 238000002156 mixing Methods 0.000 description 8
- 238000003756 stirring Methods 0.000 description 7
- 229910052709 silver Inorganic materials 0.000 description 6
- 239000004332 silver Substances 0.000 description 6
- 230000000996 additive effect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 229910000906 Bronze Inorganic materials 0.000 description 3
- 239000010974 bronze Substances 0.000 description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 3
- 239000007772 electrode material Substances 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 238000007650 screen-printing Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Adjustable Resistors (AREA)
- Conductive Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、可変抵抗器用の電極部分に形成する摺動用電
極ペーストに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sliding electrode paste formed on an electrode portion of a variable resistor.
従来、可変抵抗器用の電極材としては、■金属箔積層板
の金属箔を用いる場合、■前記金属箔に金やニッケルを
メッキにより成膜して用いる場合■フェノール樹脂など
の熱硬化性樹脂バインダー中に銀や銅などの導電性粒子
を混練してペースト化し、このペースト化した電極ペー
ストを絶縁基板上の表面にスプレーや印刷によって皮膜
状に付着させ、これを加熱硬化した場合、などが−船釣
に知られている。Conventionally, as electrode materials for variable resistors, ■ When using metal foil of a metal foil laminate, ■ When using the metal foil by plating gold or nickel, ■ When using thermosetting resin binder such as phenolic resin. When conductive particles such as silver or copper are kneaded into a paste and this paste-formed electrode paste is applied to the surface of an insulating substrate in the form of a film by spraying or printing, and this is heated and cured, etc. Known for boat fishing.
そして可変抵抗器は、上記のような電極材により形成し
た電極体と、電極体の一部が重なるように抵抗ペースト
を印刷硬化して形成した抵抗素子とを、金属刷子が摺動
することによって任意の抵抗値を取り出すことができる
ように構成したもので、その摺動寿命特性は数１０万サ
イクルであるのが一般的である。A variable resistor is manufactured by sliding a metal brush between an electrode body made of the electrode material described above and a resistance element formed by printing and hardening a resistance paste so that a portion of the electrode body overlaps. It is constructed so that any resistance value can be taken out, and its sliding life characteristic is generally several hundred thousand cycles.
このような可変抵抗器にあって、近年数百万サイクルに
耐え得る製品寿命の永い信頼性の高い可変抵抗器の出現
が強く要望されている。この要望に応えて抵抗ペースト
の開発が成されているか（本出願人においても特願平１
−１７３３０２号として出願している。）、それに伴っ
て同様に金属刷子が摺動する電極部分についても、摺動
寿命の永い高信頼性のある電極材料が必要となってきた
。Among such variable resistors, there has recently been a strong demand for a highly reliable variable resistor that can withstand several million cycles and has a long product life. Has any resistance paste been developed in response to this demand?
It has been filed as No.-173302. ), as well as for the electrode portion on which the metal brush slides, there has been a need for highly reliable electrode materials with a long sliding life.
ところで、可変抵抗器は、抵抗素子と電極との上面を金
属製（例えばリン青銅、ベリリウム銅を素材としたもの
）の刷子が接触すると共に摺動するので、抵抗膜に比べ
て弱い電極膜（電極ペーストや金属メッキ）が削り取ら
れ、逐には基板面の露出に至るという問題点があった。By the way, in a variable resistor, a metal brush (for example, made of phosphor bronze or beryllium copper) contacts and slides on the upper surfaces of the resistance element and the electrode, so the electrode film (which is weaker than the resistance film) There was a problem in that the electrode paste and metal plating) were scraped off, eventually exposing the board surface.
なぜならば、電極ペーストの場合には、電極部分の抵抗
値を低くするために、抵抗ペーストに比べて多量の金属
導電物質が配合されており、また金属メッキの場合には
、金属そのものが０．３〜１０μｍという薄膜で施され
ているのが一般的であり、いずれの場合においても電極
部分は、抵抗素子に比べてその表面硬度が軟らかく弱く
なる傾向にあるからである。また、金属メッキの場合、
摩耗に対する耐用性を向上させるために、その膜厚を厚
くしようとすると大幅なコストアップにつながり、安価
な製品供給が不可能となる。This is because, in the case of electrode paste, a larger amount of metal conductive material is mixed than in resistance paste in order to lower the resistance value of the electrode part, and in the case of metal plating, the metal itself is 0. This is because it is generally applied as a thin film of 3 to 10 μm, and in any case, the surface hardness of the electrode portion tends to be softer and weaker than that of the resistive element. In addition, in the case of metal plating,
Increasing the film thickness in order to improve durability against abrasion will lead to a significant increase in cost, making it impossible to supply products at low prices.
そこで本発明は前記事情に基づいてなされたものであり
、金属刷子との摺動に対して耐摩耗性に優れ然かも安価
な摺動用電極ペーストを提供することを目的とする。The present invention has been made based on the above-mentioned circumstances, and an object of the present invention is to provide an inexpensive sliding electrode paste that has excellent abrasion resistance against sliding with a metal brush.
上記目的を達成するために本発明の摺動用電極ペースト
は、樹脂バインダー中に導電性材料を付与すると共に、
フェノール樹脂を還元雰囲気中において高温で炭化焼成
した１０数μｍ以下の球径を有する球形ガラス状カーボ
ンを添加することによって構成されている。また前記球
形ガラス状カーボンの表面に金属メッキを施したもので
あってもよい。さらに球形ガラス状カーボンと、該球形
ガラス状カーボンの表面に金属メッキをしたものとを、
複合的に添加してもよい。In order to achieve the above object, the sliding electrode paste of the present invention provides a conductive material in a resin binder, and
It is constructed by adding spherical glassy carbon having a spherical diameter of 10-odd micrometers or less, which is obtained by carbonizing and firing phenol resin at high temperature in a reducing atmosphere. Further, the surface of the spherical glassy carbon may be plated with metal. Furthermore, spherical glassy carbon and metal plating on the surface of the spherical glassy carbon,
They may be added in combination.
前記球形ガラス状カーボンの代わりに、球径が１０数μ
ｍ以下の球形無機物質あるいは１０数μｍ以下の細さを
有する繊維状無機物質を添加してもよい。この場合球形
無機物質としては、例えば、ガラスビーズ、セラミック
ボール若しくは金属ボール又はガラスビーズやセラミッ
クボールの表面に金属メッキを施したものが好ましく、
繊維状無機物質としては、例えばガラス繊維、セラミッ
ク繊維、金属繊維若しくはセラミックウィスカ（炭化ケ
イ素）又はガラス繊維やセラミック繊維の表面に金属メ
ッキを施したものが好ましい。また、それらを単独或い
は複合的に添加してもよい。Instead of the spherical glassy carbon, the spherical diameter is about 10 μm.
A spherical inorganic substance having a diameter of less than 10 m or a fibrous inorganic substance having a diameter of less than 10-odd micrometers may be added. In this case, the spherical inorganic substance is preferably, for example, a glass bead, a ceramic ball, a metal ball, or a glass bead or ceramic ball whose surface is plated with metal.
The fibrous inorganic substance is preferably, for example, glass fiber, ceramic fiber, metal fiber, ceramic whisker (silicon carbide), or glass fiber or ceramic fiber whose surface is plated with metal. Further, they may be added singly or in combination.
さらに、前記した球形ガラス状カーボン、該ガラス状カ
ーボンの表面に金属メッキを施したもの、若しくは球形
無機物質、又は繊維状無機物質を適宜選択して複合的に
添加してもよい。Furthermore, the above-described spherical glassy carbon, glassy carbon whose surface is plated with metal, spherical inorganic substances, or fibrous inorganic substances may be appropriately selected and added in combination.
本発明による摺動用電極ペーストには、球形ガラス状カ
ーボン、球形無機物質又は繊維状無機物質なとの添加物
が含有しているので、これを摺動用の可変抵抗器の電極
に使用すれば、金属刷子との摺動によりバインダー樹脂
は削られて行くが、金属材料よりも硬度の硬い前記添加
物の存在によって、金属刷子と添加物の接触面ではその
硬さから摩耗度合が少なくなり、電極皮膜全体として対
摩耗性が付与される。Since the sliding electrode paste according to the present invention contains additives such as spherical glassy carbon, spherical inorganic material, or fibrous inorganic material, if this is used for the electrode of a sliding variable resistor, The binder resin is scraped away by sliding with the metal brush, but due to the presence of the additive, which is harder than the metal material, the degree of wear at the contact surface between the metal brush and the additive is reduced due to its hardness, and the electrode Abrasion resistance is imparted to the entire film.
球形を有する添加物では、ペースト中へ高い密度で充填
ができるため、電極皮膜への硬度の上昇が可能となり、
さらに球形形状による添加物の表面積の増大から、バイ
ンダー樹脂との密着性が増強されている。Additives with a spherical shape can be filled into the paste with high density, making it possible to increase the hardness of the electrode film.
Furthermore, due to the increased surface area of the additive due to its spherical shape, its adhesion with the binder resin is enhanced.
以下、本発明の実施例について説明する。 Examples of the present invention will be described below.
まず、本発明の摺動用電極ペーストを得るには次の材料
を用意する。すなわち、バインダー樹脂としてフェノー
ル樹脂なとの熱硬化性樹脂を２５部、導電性材料として
銀粉を６５〜７５部、溶剤としてイソプロピルアルコー
ルやブチルカルピトールを３〜８部、他に消泡剤１〜３
部をそれぞれ用意し、さらに球形のガラス状カーボン、
ガラスビーズ、セラミックボール、金属ボール、及び繊
維状の炭素繊維、ガラス繊維、セラミック繊維、金属繊
維、セラミックウィスカ（炭化ケイ素）並びに前記物質
のうち絶縁物に金属メッキを施したものであって、球形
または細さが１０数μ。以下のものを各々１０〜４０部
準備する。First, to obtain the sliding electrode paste of the present invention, the following materials are prepared. That is, 25 parts of a thermosetting resin such as a phenol resin as a binder resin, 65 to 75 parts of silver powder as a conductive material, 3 to 8 parts of isopropyl alcohol or butyl calpitol as a solvent, and 1 to 10 parts of an antifoaming agent. 3
Prepare each section, and further prepare spherical glassy carbon,
Glass beads, ceramic balls, metal balls, fibrous carbon fibers, glass fibers, ceramic fibers, metal fibers, ceramic whiskers (silicon carbide), and among the above substances, insulators plated with metal, spherical Or the thinness is about 10 microns. Prepare 10 to 40 copies of each of the following.
上記材料の各々の配合割合を変え、実施例１乃至１０に
示す各摺動用電極ペーストを得た。Each of the sliding electrode pastes shown in Examples 1 to 10 was obtained by changing the blending ratio of each of the above materials.
（実施例１）
フェノール樹脂２５部、銀粉末７２部、ガラス状カーボ
ン２０部、イソプロピルアルコール８部及び消泡剤１部
をそれぞれ混合し攪拌した後、三本ロールミルで混練し
、さらにブチルカルピトールにて粘度調整を行なって、
１２０ｍΩ７，７口の摺動用電極ペーストを得た。(Example 1) 25 parts of phenol resin, 72 parts of silver powder, 20 parts of glassy carbon, 8 parts of isopropyl alcohol, and 1 part of antifoaming agent were mixed and stirred, and then kneaded in a three-roll mill, and further mixed with butyl calpitol. Adjust the viscosity with
A sliding electrode paste of 120 mΩ 7.7 openings was obtained.
（実施例２）
フェ／−ル樹脂２５部、銀粉末７２部、導電性ガラスビ
ーズ（ガラスビーズに銀メッキを施したもの）１５部、
イソフロビルアルコール８部及び消泡剤１部をそれぞれ
混合し攪拌した後、三本ロールミルで混練し、さらにブ
チルカルピトールにて粘度調整を行なって、１５０ｍΩ
７・′口の摺動用電極ペーストを得た。(Example 2) 25 parts of Fer/- resin, 72 parts of silver powder, 15 parts of conductive glass beads (glass beads plated with silver),
After mixing and stirring 8 parts of isoflobil alcohol and 1 part of an antifoaming agent, the mixture was kneaded in a three-roll mill, and the viscosity was adjusted with butyl calpitol to give 150 mΩ.
7. A sliding electrode paste was obtained.
（実施例３）
フェノール樹脂２５部、銀粉末７２部、導電性セラミッ
クボール（セラミックボールに銀メッキを施したもの）
１５部、イソプロピルアルコール８部及び消泡剤１部を
それぞれ混合し攪拌した後、三本ロールミルで混練し、
さらにブチルカルピトールにて粘度調整を行なって、１
６０ｍΩ／′口の摺動用電極ペーストを得た。(Example 3) 25 parts of phenolic resin, 72 parts of silver powder, conductive ceramic ball (ceramic ball plated with silver)
After mixing and stirring 15 parts of isopropyl alcohol, 8 parts of isopropyl alcohol, and 1 part of antifoaming agent, the mixture was kneaded in a three-roll mill.
Furthermore, the viscosity was adjusted with butyl calpitol, and 1
A sliding electrode paste of 60 mΩ/' opening was obtained.
（実施例４）
フェノール樹脂２５部、銀粉末７２部、金属ポ−ル（青
銅）２０部、イソプロピルアルコール８部及び消泡剤１
部をそれぞれ混合し攪拌した後、三本ロールミルで混練
し、さらにブチルカルピトールにて粘度調整を行なって
、１１０ｍΩ／口の摺動用電極ペーストを得た。(Example 4) 25 parts of phenolic resin, 72 parts of silver powder, 20 parts of metal pole (bronze), 8 parts of isopropyl alcohol, and 1 part of antifoaming agent
After mixing and stirring the parts, they were kneaded in a three-roll mill, and the viscosity was further adjusted with butyl calpitol to obtain a sliding electrode paste of 110 mΩ/mouth.
（実施例５）
フェノール樹脂２５部、銀粉末７２部、炭素繊維２０部
、イソプロピルアルコール８部及び消泡剤１部をそれぞ
れ混合し攪拌した後、三本ロールミルで混練し、さらに
ブチルカルピトールにて粘度調整を行なって、１２５ｍ
Ω／口の摺動用電極ペーストを得た。(Example 5) 25 parts of phenol resin, 72 parts of silver powder, 20 parts of carbon fiber, 8 parts of isopropyl alcohol, and 1 part of antifoaming agent were mixed and stirred, and then kneaded in a three-roll mill, and further mixed with butyl calpitol. After adjusting the viscosity, 125 m
A sliding electrode paste of Ω/mouth was obtained.
（実施例６）
フェノール樹脂２５部、銀粉末７２部、導電性ガラス繊
維（ガラス繊維に銀メッキを施したもの）２０部、イソ
プロピルアルコール８部及び消泡剤１部をそれぞれ混合
し攪拌した後、三本ロールミルで混練し、さらにブチル
カルピトールにテ粘度調整を行なって、１２０ｍΩ／口
の摺動用電極ペーストを得た。(Example 6) After mixing and stirring 25 parts of phenolic resin, 72 parts of silver powder, 20 parts of conductive glass fiber (glass fiber plated with silver), 8 parts of isopropyl alcohol, and 1 part of antifoaming agent. The mixture was kneaded in a three-roll mill, and the viscosity was adjusted using butyl calpitol to obtain a sliding electrode paste of 120 mΩ/hole.
（実施例７）
フェノール樹脂２５部、銀粉末７２部、導電性セラミッ
ク繊維（アルミナ繊維に銀メッキを施したもの）２０部
、イソプロピルアルコール８部及び消泡剤１部をそれぞ
れ混合し攪拌した後、三本ロールミルで混練し、さらに
ブチルカルピトールにて粘度調整を行なって、１４０ｍ
Ω／口の摺動用電極ペーストを得た。(Example 7) After mixing and stirring 25 parts of phenolic resin, 72 parts of silver powder, 20 parts of conductive ceramic fiber (alumina fiber plated with silver), 8 parts of isopropyl alcohol, and 1 part of antifoaming agent. , kneaded in a three-roll mill, and further adjusted the viscosity with butyl calpitol to form a 140 m
A sliding electrode paste of Ω/mouth was obtained.
（実施例８）
フェノール樹脂２５部、銀粉末７２部、金属繊維（ステ
ンレス繊維）２０部、イソプロピルアルコール８部及び
消泡剤１部をそれぞれ混合し攪拌した後、三本ロールミ
ルで混練し、さらにブチルカルピトールにて粘度調整を
行なって、９５ｍΩ／口の摺動用電極ペーストを得た。(Example 8) After mixing and stirring 25 parts of phenol resin, 72 parts of silver powder, 20 parts of metal fiber (stainless steel fiber), 8 parts of isopropyl alcohol, and 1 part of antifoaming agent, the mixture was kneaded in a three-roll mill, and then The viscosity was adjusted with butyl calpitol to obtain a sliding electrode paste of 95 mΩ/hole.
（実施例９）
フエ／−ル樹脂２５部、銀粉末７２部、セラミックウィ
スカ（炭化ケイ素ウィスカ）２０部、イソプロピルアル
コール８部及び消泡剤１部をそれぞれ混合し攪拌した後
、三本ロールミルで混練し、さらにブチルカルピトール
にて粘度調整を行なって、１００ｍΩ／口の摺動用電極
ペーストを得た。(Example 9) 25 parts of foam resin, 72 parts of silver powder, 20 parts of ceramic whiskers (silicon carbide whiskers), 8 parts of isopropyl alcohol, and 1 part of antifoaming agent were mixed and stirred, and then mixed in a three-roll mill. The mixture was kneaded and the viscosity was adjusted with butyl calpitol to obtain a sliding electrode paste of 100 mΩ/hole.
（実施例１０）
フェノール樹脂２５部、銀粉末７２部、導電性ガラスビ
ーズ（ガラスビーズに銀メッキを施したもの）１０部、
炭素繊維１０部、イソプロピルアルコール８部及び消泡
剤１部をそれぞれ混合し攪拌した後、正本ロールミルで
混練し、さらにブチルカルピトールにて粘度調整を行な
って、１３５ｍΩ／′口の摺動用電極ペーストを得た。(Example 10) 25 parts of phenolic resin, 72 parts of silver powder, 10 parts of conductive glass beads (glass beads plated with silver),
After mixing and stirring 10 parts of carbon fiber, 8 parts of isopropyl alcohol, and 1 part of an antifoaming agent, they were kneaded in a Seihon roll mill, and the viscosity was adjusted with butyl calpitol to obtain a sliding electrode paste with a diameter of 135 mΩ/'. I got it.
上記各実施例１乃至１０て得た各摺動用電極ペーストを
スクリーン印刷機によって第１図及び第２図に示す基板
１上の電極２の部分に印刷し、１５０°Ｃの温度で６０
分間加熱して硬化させ、金属刷子３が摺動する膜厚１５
〜２０μｍの電極２を形成した。図中において符号４は
、抵抗ペーストで形成した抵抗素子である。Each of the sliding electrode pastes obtained in Examples 1 to 10 above was printed on the electrode 2 portion of the substrate 1 shown in FIGS. 1 and 2 using a screen printer, and
The thickness of the film is 15, on which the metal brush 3 slides.
An electrode 2 of ~20 μm was formed. In the figure, reference numeral 4 indicates a resistance element formed of resistance paste.
尚、繊維状の添加物は短繊維とはいえども数ｒｎｔｎの
長さを有するものも有り、そのままではスクリーン印刷
による膜形成でメツシュを通過出来ずに目詰まりを起こ
してしまうが、ペースト製造時にロールミルを使用して
混練する際に、各繊維の長さ方向に対する折れや曲りを
利用して１００μ山以下の長さに切断されることにより
、スクリーン印刷による膜形成が支障をきたさずにてき
る。但し、各繊維の幅方向に対しては充分な強度と硬度
を有しているので、ロールミルて混練しても漬れること
はない。また、スクリーン印刷による電極の膜厚は最大
限２０μｍ程度であるため、添加物としての球形ガラス
状カーボン及び球形無機物質並びに繊維状無機物質にお
ける球径または細さは、最大限１０数μｍ位までにしで
ある。Although fibrous additives are short fibers, some have a length of several rntn, and if left as is, they cannot pass through the mesh due to film formation by screen printing, causing clogging. When kneading using a roll mill, each fiber is cut into lengths of 100 μm or less by utilizing the bends and bends in the length direction, allowing film formation by screen printing to be performed without any hindrance. . However, since each fiber has sufficient strength and hardness in the width direction, it will not be soaked even when kneaded in a roll mill. In addition, since the maximum film thickness of the electrode by screen printing is about 20 μm, the diameter or thinness of the spherical glassy carbon, spherical inorganic substance, and fibrous inorganic substance as additives is limited to about 10-odd μm at most. It's Nishide.
このようにして実施例１乃至１０による各摺動用電極ペ
ーストによって形成した各電極における摺動回数と耐摩
耗性及び抵抗値変化を、従来の電極のそれと比較しなが
ら、以下の方法によって試験を行ない、その結果を第３
図及び第４図のグラフに示した。The number of times of sliding, abrasion resistance, and change in resistance of each electrode formed using each of the sliding electrode pastes according to Examples 1 to 10 in this manner were compared with those of conventional electrodes, and tests were conducted using the following method. , the result is the third
It is shown in the figure and the graph of FIG.
この際、各実施例で得た電極ペーストにより形成した電
極と比べる比較例は、フェノール樹脂２５部、銀粉末７
２部、イソプロピルアルコール６部及び消泡剤１部を混
合し攪拌Ｉ５た後、三本ロールミルで混練し、さらにブ
チルカルピトールにて粘度調整を行なって、５０ｍΩ／
口の電極ペーストを、前記と同様の処理によって基板上
に印刷で電極を形成すると共に硬化させた膜厚１５〜２
０μｍの従来の電極である。At this time, in the comparative example compared to the electrode formed using the electrode paste obtained in each example, 25 parts of phenol resin and 7 parts of silver powder were used.
2 parts of isopropyl alcohol and 1 part of an antifoaming agent were mixed and stirred for 15 minutes, then kneaded in a three-roll mill, and the viscosity was adjusted with butyl calpitol to give a viscosity of 50 mΩ/
Electrode paste was printed on the substrate using the same process as described above, and the electrode paste was cured to a film thickness of 15 to 2.
This is a conventional electrode of 0 μm.
第３図及び第４図の各グラフに示す試験においては、摺
動刷子としてリン青銅を使用し、刷子圧５０ｇ摺動速度
１５ｍｍ／ｓにて行なった。その結果、第３図に示すよ
うに、各添加物を配合添加した実施例１乃至１０の各実
施例のものから成る電極は、それらを添加していない比
較例のものに比べて、刷子による摺動回数との関係で摩
耗の深さが遥かに小さいことが判る。すなわち、比較例
のものは、１０数万サイクル摺動後に電極が完全に削り
取られたのに対し、各実施例のものは、１００万サイク
ル摺動後でも９〜１７μｍ程度しか摩耗してない。In the tests shown in the graphs of FIGS. 3 and 4, phosphor bronze was used as the sliding brush, and the tests were conducted at a brush pressure of 50 g and a sliding speed of 15 mm/s. As a result, as shown in Fig. 3, the electrodes made of each of Examples 1 to 10 in which each additive was mixed and added were more effective when brushed than the comparative example in which these additives were not added. It can be seen that the depth of wear is much smaller in relation to the number of sliding movements. That is, in the comparative example, the electrode was completely scraped off after 100,000 cycles of sliding, whereas in each of the examples, only about 9 to 17 μm of wear was observed even after 1 million cycles.
また、第４図に示すように、刷子による摺動回数と抵抗
値変化率の関係を比較したグラフからも、前記添加物を
配合した各実施例のものから成る電極は、それらを添加
していない比較例のものに比べて抵抗値の変化率が小さ
いことか判る。Furthermore, as shown in Fig. 4, a graph comparing the relationship between the number of sliding strokes with a brush and the rate of change in resistance value also shows that the electrodes made of each example containing the above-mentioned additives do not contain the additives. It can be seen that the rate of change in resistance value is smaller than that of the comparative example.
以上説明したように本発明による摺動用電極ペーストは
、これを可変抵抗器の電極に使用すれば、次に記載する
ような効果を奏する。As explained above, when the sliding electrode paste according to the present invention is used as an electrode of a variable resistor, the following effects can be achieved.
すなわち、本発明の摺動用電極ペースト中には、ガラス
状カーボン、ガラスビーズ、セラミックボール、金属ボ
ールなどのような球形の添加物、若しくは炭素繊維、ガ
ラス繊維、セラミック繊維、金属繊維、セラミックウィ
スカ（炭化ケイ素）などのような繊維状の添加物、又は
それらの添加物のうち絶縁性のものには金属メッキを施
した添加物が含有されているので、電極皮膜の硬度か増
大し、金属刷子との摺動に対して耐摩耗性能が飛躍的に
向上すると共に、抵抗値の変化率が少なく電気的性能が
安定しており、摺動用抵抗器の商品寿命を大幅に改善で
き、本発明の摺動用電極ペーストが安価なことと相俟っ
て、極めて実用価値の高い可変抵抗器を提供できる。That is, the sliding electrode paste of the present invention contains spherical additives such as glassy carbon, glass beads, ceramic balls, metal balls, etc., or carbon fibers, glass fibers, ceramic fibers, metal fibers, ceramic whiskers ( Since fibrous additives such as silicon carbide (silicon carbide) or insulating additives contain metal-plated additives, the hardness of the electrode film increases and the metal brush The wear resistance of the sliding resistor is dramatically improved, and the electrical performance is stable with a small rate of change in resistance value. Coupled with the fact that the sliding electrode paste is inexpensive, it is possible to provide a variable resistor with extremely high practical value.
又、含有している添加物の形が球形である場合には、ペ
ースト中へ高密度で充填が可能となり、電極皮膜の硬度
を一段と高めて金属刷子との接触に対する滑り摩擦性を
良好にすることかできると共に、表面積が大きくなるこ
とによってバインダー樹脂との密着性か増強し、従って
信頼性の高い電極を提供できる。In addition, if the additive contained is spherical, it becomes possible to fill the paste with high density, further increasing the hardness of the electrode film and improving sliding friction against contact with a metal brush. In addition, the increased surface area enhances the adhesion with the binder resin, making it possible to provide a highly reliable electrode.
第１図は本発明の摺動用電極ペーストを使用して基板上
に電極を形成した一例を示す斜視図、第２図はその断面
図、第３図は電極における摺動回数と摩耗の深さとの関
係を比較したグラフ、第４図は同じ（摺動回数と抵抗値
変化率との関係を比較したグラフである。
第 ３ 図
摺動サイクｌし×１♂サイクル
第
因
摺動サイクル×カサイクルFig. 1 is a perspective view showing an example of an electrode formed on a substrate using the sliding electrode paste of the present invention, Fig. 2 is a cross-sectional view thereof, and Fig. 3 shows the number of times of sliding and the depth of wear on the electrode. Figure 4 is a graph comparing the relationship between the number of sliding cycles and the rate of change in resistance value.
Claims (8)
フェノール系樹脂を還元雰囲気中において高温で炭化焼
成した球径１０数μｍ以下の球形ガラス状カーボンを添
加してペースト化したことを特徴とする摺動用電極ペー
スト1. In addition to adding a conductive material to the resin binder,
A sliding electrode paste characterized by adding spherical glassy carbon having a diameter of 10-odd μm or less obtained by carbonizing and baking phenolic resin at high temperature in a reducing atmosphere to form a paste.
してあるあることを特徴とする請求項１記載の摺動用電
極ペースト2. The sliding electrode paste according to claim 1, wherein the surface of the spherical glassy carbon is plated with metal.
ボンの表面に金属メッキを施したものとを、複合的に配
合し添加したことを特徴とする請求項１記載の摺動用電
極ペースト3. The sliding electrode paste according to claim 1, characterized in that the spherical glassy carbon and the spherical glassy carbon whose surface is plated with metal are added in a composite manner.
ガラス状カーボンに代えて１０数μｍ以下の球径を有す
る球形無機物質を添加したことを特徴とする摺動用電極
ペースト4. The sliding electrode paste according to claim 1, characterized in that a spherical inorganic substance having a spherical diameter of 10-odd μm or less is added in place of the spherical glassy carbon.
ール若しくは金属ボール又はガラスビーズやセラミック
ボールの表面に金属メッキを施したものであって、それ
らを単独或いは複合的に添加したことを特徴とする請求
項４記載の摺動用電極ペースト5. 4. The spherical inorganic substance is a glass bead, a ceramic ball, a metal ball, or a glass bead or a ceramic ball whose surface is plated with metal, and these are added singly or in combination. Sliding electrode paste described
ガラス状カーボンに代えて１０数μｍ以下の細さを有す
る繊維状無機物質を添加したことを特徴とする摺動用電
極ペースト6. The sliding electrode paste according to claim 1, characterized in that a fibrous inorganic substance having a fineness of 10-odd μm or less is added in place of the spherical glassy carbon.
維、金属繊維若しくはセラミックウィスカ（炭化ケイ素
）又はガラス繊維やセラミック繊維の表面に金属メッキ
を施したものであって、それらを単独或いは複合的に添
加したことを特徴とする請求項６記載の摺動用電極ペー
スト7. The fibrous inorganic substance is glass fiber, ceramic fiber, metal fiber, ceramic whisker (silicon carbide), or glass fiber or ceramic fiber whose surface is plated with metal, and these are added singly or in combination. The sliding electrode paste according to claim 6, characterized in that:
球径１０数μｍ以下の球形ガラス状カーボン、該球形ガ
ラス状カーボンの表面に金属メッキを施したもの、若し
くは球径１０数μｍ以下の球形無機物質、又は１０数μ
ｍ以下の細さを有する繊維状無機物質を適宜選択して複
合的に添加してペースト化したことを特徴とする摺動用
電極ペースト8. In addition to adding a conductive material to the resin binder,
Spherical glassy carbon with a spherical diameter of 10-odd μm or less, metal plating on the surface of the spherical glassy carbon, or spherical inorganic substance with a spherical diameter of 10-odd μm or less, or 10-odd μm or less
A sliding electrode paste, characterized in that it is made into a paste by adding appropriately selected fibrous inorganic substances having a fineness of less than m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12173290A JPH0419908A (en) | 1990-05-11 | 1990-05-11 | Paste for sliding electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12173290A JPH0419908A (en) | 1990-05-11 | 1990-05-11 | Paste for sliding electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0419908A true JPH0419908A (en) | 1992-01-23 |
Family
ID=14818513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12173290A Pending JPH0419908A (en) | 1990-05-11 | 1990-05-11 | Paste for sliding electrode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0419908A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002541616A (en) * | 1999-02-12 | 2002-12-03 | ピーキュー ホールディング， インコーポレイテッド | Conductive flexible composition and method for producing the same |
| JP2006351348A (en) * | 2005-06-16 | 2006-12-28 | Matsushita Electric Ind Co Ltd | Method for producing conductive paste and method for producing multilayer ceramic electronic component |
| KR20230113497A (en) * | 2018-12-10 | 2023-07-31 | 삼성전기주식회사 | Multi-layered ceramic electronic component and method for manufacturing the same |
-
1990
- 1990-05-11 JP JP12173290A patent/JPH0419908A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002541616A (en) * | 1999-02-12 | 2002-12-03 | ピーキュー ホールディング， インコーポレイテッド | Conductive flexible composition and method for producing the same |
| JP2006351348A (en) * | 2005-06-16 | 2006-12-28 | Matsushita Electric Ind Co Ltd | Method for producing conductive paste and method for producing multilayer ceramic electronic component |
| KR20230113497A (en) * | 2018-12-10 | 2023-07-31 | 삼성전기주식회사 | Multi-layered ceramic electronic component and method for manufacturing the same |
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