JPS61102002A - thermistor element - Google Patents

thermistor element

Info

Publication number
JPS61102002A
JPS61102002A JP59222978A JP22297884A JPS61102002A JP S61102002 A JPS61102002 A JP S61102002A JP 59222978 A JP59222978 A JP 59222978A JP 22297884 A JP22297884 A JP 22297884A JP S61102002 A JPS61102002 A JP S61102002A
Authority
JP
Japan
Prior art keywords
thermistor element
thermistor
resistance value
heat
present
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
Application number
JP59222978A
Other languages
Japanese (ja)
Inventor
小黒 正恒
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP59222978A priority Critical patent/JPS61102002A/en
Publication of JPS61102002A publication Critical patent/JPS61102002A/en
Pending legal-status Critical Current

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  • Details Of Resistors (AREA)
  • Thermistors And Varistors (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、サーミスタ素材表面に無機接着剤を塗布、焼
付けたサーミスタ素子に関するもので、特に自動車等に
利用されているオイルレベルゲージ用サーミスタ素子に
関するものである。
Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a thermistor element in which an inorganic adhesive is coated and baked on the surface of a thermistor material, and in particular to a thermistor element for oil level gauges used in automobiles, etc. It is related to.

(従来例の構成とその問題点) サーミスタは一般にマンガン、ニッケル、コバルト、鉄
などの遷移金属酸化物を用いて作られ、温度に対して、
負の抵抗値変化を示し、この性質を利用して、温度検知
センサ、液面検知センサ。
(Conventional structure and its problems) Thermistors are generally made using transition metal oxides such as manganese, nickel, cobalt, iron, etc.
Temperature detection sensors and liquid level detection sensors that exhibit negative resistance value changes and utilize this property.

温度補償用等に広く用いられている。Widely used for temperature compensation, etc.

従来より用いられているサーミスタ素子は第1図に示す
ように、サーミスタ素材1、電極2、圧入キャップ3、
耐熱有機絶縁塗料4から形成されている、いわゆるロッ
ド型サーミスタが一般的である。このサーミスタ素子は
防爆構造の全屈ケースに収納されている。このユニット
を一定の位置に固定し、サーミスタ素子が液面の上にあ
るか、下にあるかによって、サーミスタ素子の抵抗値が
変化し、液面のレベル検知をしている。このとき、サー
ミスタ素子が液の上に出ていると、液中にあるときより
熱放散が悪く、素子表面温度が上昇し。
As shown in Fig. 1, a conventionally used thermistor element consists of a thermistor material 1, an electrode 2, a press-fit cap 3,
A so-called rod-type thermistor formed from a heat-resistant organic insulating paint 4 is common. This thermistor element is housed in a fully bent case with an explosion-proof structure. This unit is fixed at a fixed position, and the resistance value of the thermistor element changes depending on whether it is above or below the liquid level, and the level of the liquid level is detected. At this time, if the thermistor element is above the liquid, heat dissipation is worse than when it is in the liquid, and the element surface temperature increases.

300℃ないし450℃に達することがある。このよう
な高温になると、電極に使用している銀がマイグレーシ
ョンを起こし、電極間でショートして、サーミスタ素子
の機能を損なう。また、マイグレーションを防ぐために
、従来より、シリコン系の耐熱有機塗料を表面に塗布し
て保護しているが、高温になると、有機物が炭化したり
、または、表面にピンホール等ができ、腐蝕が発生して
サーミスタ素子を劣化させ1機能を損なう欠点があった
Temperatures can reach 300°C to 450°C. At such high temperatures, the silver used in the electrodes migrates, causing a short circuit between the electrodes and impairing the functionality of the thermistor element. In addition, to prevent migration, silicon-based heat-resistant organic paint has traditionally been applied to the surface to protect it, but at high temperatures, the organic matter may carbonize or form pinholes on the surface, leading to corrosion. This has the drawback of causing deterioration of the thermistor element and impairing one function.

(発明の目的) 本発明の目的は、従来の欠点を解消し、高信頼性を有す
るサーミスタ素子を提供することである。
(Object of the Invention) An object of the present invention is to eliminate the conventional drawbacks and provide a thermistor element having high reliability.

(発明の構成) 本発明のサーミスタ素子は、電極に銀を用いたサーミス
タ素材に、特殊チタン化合物を主原料とした耐熱性無機
接着剤を塗布、焼付けたものである。
(Structure of the Invention) The thermistor element of the present invention is a thermistor material using silver for electrodes, coated with a heat-resistant inorganic adhesive mainly made of a special titanium compound, and baked.

(実施例の説明) 本発明の一実施例を第2図および第3図に基づいて説明
する。第2図は本発明の一実施例によるサーミスタ素子
の断面図である。同図において5は特殊チタン化合物を
主原料とした耐熱性無機接着剤(商品名、G5−800
−コスモス化成)で、素子表面を均一に50μmないし
100μmの厚さに塗布し、200℃ないし300℃の
温度で、15分ないし20分間焼付けをする。こうして
製作したサーミスタ素子を、オイルレベルゲージユニッ
トに組み込み、過酷なりC20V連続通電試験を実施し
た結果、第3図に示すように、従来品にくらべ、抵抗値
変化が少なく非常に安定しており、信頼性が向上するこ
とがわかる。同図においてAは従来品、Bは本発明品の
抵抗値変化特性である。
(Description of Embodiment) An embodiment of the present invention will be described based on FIGS. 2 and 3. FIG. 2 is a sectional view of a thermistor element according to an embodiment of the present invention. In the same figure, 5 is a heat-resistant inorganic adhesive (product name: G5-800) whose main raw material is a special titanium compound.
- Cosmos Kasei) is coated uniformly on the surface of the element to a thickness of 50 to 100 μm, and baked at a temperature of 200 to 300° C. for 15 to 20 minutes. The thermistor element manufactured in this way was incorporated into an oil level gauge unit and subjected to a severe C20V continuous current test.As shown in Figure 3, it was found to be extremely stable with less resistance change compared to conventional products. It can be seen that reliability is improved. In the figure, A is the resistance value change characteristic of the conventional product, and B is the resistance value change characteristic of the present invention product.

塗布膜厚が50μmより薄くなると、抵抗値変化が大き
くなるものが出てくる。また、厚く塗布しすぎると熱応
答性が遅くなり、好ましくない。
When the coating film thickness becomes thinner than 50 μm, some products exhibit a large change in resistance value. Moreover, if it is applied too thickly, the thermal response becomes slow, which is not preferable.

(発明の効果) 以上説明したように本発明によれば、オイルレベルゲー
ジに用いられるサーミスタ素子の表面温度が300℃な
いし450℃という高温になっても、電極のマイグレー
ション、あるいは、絶縁膜の劣化という欠点を除去する
ことができ、高信頼性のサーミスタ素子を得ることがで
きる効果がある。
(Effects of the Invention) As explained above, according to the present invention, even if the surface temperature of the thermistor element used in an oil level gauge reaches a high temperature of 300°C to 450°C, migration of the electrode or deterioration of the insulating film will not occur. This disadvantage can be eliminated, and a highly reliable thermistor element can be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は従来のサーミスタ素子の断面図、第2図は本発
明によるサーミスタ素子の断面図、第3図は空中連続通
電試験抵抗値変化特性図である。 1 ・・・サーミスタ素材、 2・・・電極、 3 ・
・・圧入キャップ、 4 ・・・耐熱性有機絶縁塗料、
5 ・・・耐熱性無機接着剤、 A・・・従来品の抵抗
値変化特性、 B ・・・本発明品の抵抗値変化特性。 特許出願人 松下電器産業株式会社 第1図 」
FIG. 1 is a sectional view of a conventional thermistor element, FIG. 2 is a sectional view of a thermistor element according to the present invention, and FIG. 3 is a resistance value change characteristic diagram in an air continuous energization test. 1...Thermistor material, 2...Electrode, 3.
・・Press-fit cap, 4 ・・Heat-resistant organic insulation paint,
5...Heat-resistant inorganic adhesive, A...Resistance value change characteristics of conventional product, B...Resistance value change characteristics of present invention product. Patent applicant: Matsushita Electric Industrial Co., Ltd. Figure 1

Claims (1)

【特許請求の範囲】[Claims] 電極に銀を用いたサーミスタ素材に、特殊チタン化合物
を主原料とした耐熱性無機接着剤を塗布、焼付けたこと
を特徴とするサーミスタ素子。
A thermistor element characterized by coating and baking a heat-resistant inorganic adhesive made from a special titanium compound onto a thermistor material using silver for electrodes.
JP59222978A 1984-10-25 1984-10-25 thermistor element Pending JPS61102002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59222978A JPS61102002A (en) 1984-10-25 1984-10-25 thermistor element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59222978A JPS61102002A (en) 1984-10-25 1984-10-25 thermistor element

Publications (1)

Publication Number Publication Date
JPS61102002A true JPS61102002A (en) 1986-05-20

Family

ID=16790873

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59222978A Pending JPS61102002A (en) 1984-10-25 1984-10-25 thermistor element

Country Status (1)

Country Link
JP (1) JPS61102002A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57208106A (en) * 1981-06-17 1982-12-21 Matsushita Electric Industrial Co Ltd Thin film thermistor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57208106A (en) * 1981-06-17 1982-12-21 Matsushita Electric Industrial Co Ltd Thin film thermistor

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