JPH04206186A - Composition for heater formation - Google Patents
Composition for heater formationInfo
- Publication number
- JPH04206186A JPH04206186A JP2325946A JP32594690A JPH04206186A JP H04206186 A JPH04206186 A JP H04206186A JP 2325946 A JP2325946 A JP 2325946A JP 32594690 A JP32594690 A JP 32594690A JP H04206186 A JPH04206186 A JP H04206186A
- Authority
- JP
- Japan
- Prior art keywords
- weight part
- composition
- weight
- heater
- parts
- 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
- 239000000203 mixture Substances 0.000 title claims abstract description 16
- 230000015572 biosynthetic process Effects 0.000 title abstract 3
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000011521 glass Substances 0.000 claims abstract description 10
- 239000000758 substrate Substances 0.000 abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 8
- 238000010304 firing Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 239000011812 mixed powder Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011195 cermet Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Landscapes
- Resistance Heating (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、セラミックス基板に印刷焼成して形成するヒ
ータ形成用組成物に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a composition for forming a heater which is formed by printing and firing on a ceramic substrate.
［従来の技術］
セラミックス基板に発熱体原料を印刷、焼成し、発熱体
を形成する手法において、従来、発熱体としてＡｇサー
メット等が用いられていたが、抵抗値の調整や温度係数
の調整が困難であり、ヒータを低温でスタートする時に
大電流が流れてしまう問題点があった。また経時安定性
にも乏しく、Ａｇのマイグレーションによる絶縁抵抗の
低下、酸化による抵抗値の増大、断線等による短寿命と
いう問題点があった。[Prior art] In the method of printing and firing a heating element raw material on a ceramic substrate to form a heating element, Ag cermet etc. were conventionally used as the heating element, but it was difficult to adjust the resistance value and temperature coefficient. This is difficult, and there is a problem in that a large current flows when starting the heater at a low temperature. It also has poor stability over time, and has problems such as a decrease in insulation resistance due to Ag migration, an increase in resistance value due to oxidation, and a short life due to wire breakage.
［発明が解決しようとする課題］
本発明は、上記従来の欠点を解消し、抵抗値の調整が容
易で、抵抗の温度特性のすぐれたヒータ形成用組成物を
提供することを目的とするものである。[Problems to be Solved by the Invention] It is an object of the present invention to provide a composition for forming a heater that eliminates the above-mentioned conventional drawbacks, allows easy adjustment of resistance value, and has excellent resistance temperature characteristics. It is.
［課題を解決するための手段１
本発明は、
Ｐｄ：１０〜８５重量部
Ｐｔ：１５〜９０重量部
計１００重量部から成る微粉末にガラスフリット１〜２
０重量部を混合しペースト化して構成したヒータ形成用
組成物である。[Means for Solving the Problems 1] The present invention comprises adding glass frits 1 to 2 to a fine powder consisting of 10 to 85 parts by weight of Pd, 15 to 90 parts by weight, and 100 parts by weight of Pt in total.
This is a composition for forming a heater made by mixing 0 parts by weight and making a paste.
また、上記ＰｄとＰｔにＡｇ：１〜１０重量部を加えて
計１００重量部とし、これにガラスフリットを混合すれ
ば好適である。Further, it is preferable to add 1 to 10 parts by weight of Ag to the above Pd and Pt to make a total of 100 parts by weight, and to mix glass frit thereto.
［作用］
本発明の組成物は、Ｐｄ、Ｐｔの特定比率の混合粉又は
合金化粉を用いる。これにＡｇを加えるとさらに好まし
い。[Function] The composition of the present invention uses a mixed powder or alloyed powder of Pd and Pt in a specific ratio. It is even more preferable to add Ag to this.
ＰｔとＰｄの比率Ｒ（Ｐｄ／Ｐｔ）は８５／１５〜１０
／９０とする。Ｒが８５／１５より大きい場合、またＲ
が１０／９０より小さい場合はいずれも抵抗温度係数が
大きくなるのでこの範囲に限定した。The ratio R of Pt and Pd (Pd/Pt) is 85/15 to 10
/90. If R is greater than 85/15, also R
Since the temperature coefficient of resistance becomes large in any case where is smaller than 10/90, it is limited to this range.
本発明の組成物は抵抗温度係数の大幅な低減が可能であ
る。すなわち、抵抗温度係数が５００ｐｐｍ／に未満の
値をもつ発熱体を得ることができる。また、高い耐酸化
性があり、大気中での安定性が増加し、長寿命化が達成
される。The composition of the present invention can significantly reduce the temperature coefficient of resistance. That is, it is possible to obtain a heating element having a resistance temperature coefficient of less than 500 ppm/. It also has high oxidation resistance, increases stability in the atmosphere, and achieves a longer life.
また本発明の組成物を用いた発熱体は、Ａｇのマイグレ
ーションがないので、使用中の耐電圧低下によるショー
トが起こらず、長寿命である。Furthermore, since there is no migration of Ag in the heating element using the composition of the present invention, there is no short circuit due to a drop in withstand voltage during use, and the heating element has a long life.
Ａｇを加える理由は、Ｐｄ−Ｐｔに比べて大幅な焼成温
度の低下が可能であり、７００〜９００℃の焼成温度範
囲においても抵抗体形成が可能である・また、Ｐｔ含有
量が高いので、Ａｇサーメットに見られるようなＡｇマ
イグレーションの問題も起こりに（い。The reason for adding Ag is that the firing temperature can be significantly lowered compared to Pd-Pt, and it is possible to form a resistor even in the firing temperature range of 700 to 900°C.Also, since the Pt content is high, Ag migration problems like those seen in Ag cermets may also occur.
抵抗値はガラスフリットの配合量を増減することにより
０．０５〜５Ω／口の間で調整可能である。ガラスフリ
ットがＰｄとＰｔ混合粉もしくは合金化粉又はＰｄとＰ
ｔとＡｇ合計混合粉もしくは合金化粉に対して１重量部
未満では発熱体の電気抵抗が小さすぎて不適当であり、
２０重量部を越えると抵抗が大きくなりすぎるので１〜
２０重量部に限定した。The resistance value can be adjusted between 0.05 and 5 Ω/mouth by increasing or decreasing the amount of glass frit. Glass frit is Pd and Pt mixed powder or alloyed powder or Pd and P
If it is less than 1 part by weight based on the total mixed powder or alloyed powder of T and Ag, the electric resistance of the heating element is too small and is inappropriate.
If it exceeds 20 parts by weight, the resistance will become too large, so 1~
The amount was limited to 20 parts by weight.
［実施例］
実施例−１
Ｐｄ：８０重量部
Ｐｔ ： ２０重量部
の組成（ｐａ／Ｐｔ＝８０／２０）を有する平均粒径ｏ
、０５μｍの粉末に、軟化点８００℃のガラスフリット
１０重量部をアルミナ基板上に印刷し、９９０℃で１時
間焼成してヒータを形成した。[Example] Example-1 Pd: 80 parts by weight Pt: 20 parts by weight, average particle size o having a composition (pa/Pt=80/20)
, 05 μm powder, 10 parts by weight of glass frit with a softening point of 800° C. was printed on an alumina substrate, and baked at 990° C. for 1 hour to form a heater.
このヒータはシート抵抗値が１Ω／口、抵抗温度係数が
２５０ｐｐｍ／にであった。通電時電流密度５０，０Ｏ
ＯＡ／ｍｍ’、４００℃通電で２０００時間後も断線が
見られず耐久性に冨み長寿命であった。This heater had a sheet resistance of 1 Ω/hole and a temperature coefficient of resistance of 250 ppm/. Current density when energized: 50.0O
OA/mm', no disconnection was observed even after 2,000 hours of energization at 400°C, indicating high durability and long life.
実施例−２
Ａｇ：３．５重量部
Ｐｄニア８．８重量部
Ｐｔ：１７．７重量部
の組成（Ｐｄ／Ｐｔ＝８２／１８）を有する平均粒径０
．１μｍの粉末に、軟化点６Ｃ）０℃のガラスフリット
１７重量部を混合してペースト化した組成物をアルミナ
基板上に印刷し、８７５℃で１時間焼成してヒータを形
成した。Example-2 Ag: 3.5 parts by weight Pd: 8.8 parts by weight Pt: 17.7 parts by weight, with an average particle size of 0 (Pd/Pt=82/18)
．． A paste composition obtained by mixing 1 μm powder with 17 parts by weight of glass frit having a softening point of 6C)0°C was printed on an alumina substrate and baked at 875°C for 1 hour to form a heater.
このヒータの特性及び耐久性を調べたところ、上記実施
例−１と同様のすぐれた効果が得られた。When the characteristics and durability of this heater were investigated, excellent effects similar to those of Example 1 were obtained.
本発明のヒータ形成用組成物は抵抗温度係数が小さく、
抵抗値を任意に調整することができ、容易にセラミック
ス基板に印刷し焼成して発熱体を形成することができ、
経時安定性に優れ長寿命である。The composition for forming a heater of the present invention has a small temperature coefficient of resistance,
The resistance value can be adjusted arbitrarily, and it can be easily printed on a ceramic substrate and fired to form a heating element.
It has excellent stability over time and has a long life.
Claims (1)
０重量部を混合しペースト化して成るヒータ形成用組成
物。 ２ 微粉末としてＰｄ及びＰｔにさらにＡｇ：１〜１０
重量部を加えて合計１００重量部とした請求項１記載の
ヒータ形成用組成物。[Claims] 1 Glass frit 1 to 2 is added to a fine powder consisting of 10 to 85 parts by weight of Pd, 15 to 90 parts by weight, and 100 parts by weight in total.
A composition for forming a heater made by mixing 0 parts by weight and making a paste. 2 In addition to Pd and Pt as fine powder, Ag: 1 to 10
2. The composition for forming a heater according to claim 1, wherein parts by weight are added to make a total of 100 parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2325946A JPH04206186A (en) | 1990-11-29 | 1990-11-29 | Composition for heater formation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2325946A JPH04206186A (en) | 1990-11-29 | 1990-11-29 | Composition for heater formation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04206186A true JPH04206186A (en) | 1992-07-28 |
Family
ID=18182372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2325946A Pending JPH04206186A (en) | 1990-11-29 | 1990-11-29 | Composition for heater formation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04206186A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5022055Y1 (en) * | 1968-10-22 | 1975-07-03 |
-
1990
- 1990-11-29 JP JP2325946A patent/JPH04206186A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5022055Y1 (en) * | 1968-10-22 | 1975-07-03 |
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