JPH0479181A - Positive characteristic thermister exothermic body - Google Patents
Positive characteristic thermister exothermic bodyInfo
- Publication number
- JPH0479181A JPH0479181A JP18937190A JP18937190A JPH0479181A JP H0479181 A JPH0479181 A JP H0479181A JP 18937190 A JP18937190 A JP 18937190A JP 18937190 A JP18937190 A JP 18937190A JP H0479181 A JPH0479181 A JP H0479181A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- aluminum powder
- positive characteristic
- heat radiating
- thermistor electrode
- 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
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 24
- 239000000853 adhesive Substances 0.000 claims abstract description 17
- 230000001070 adhesive effect Effects 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 6
- 238000003825 pressing Methods 0.000 abstract description 5
- 229920006332 epoxy adhesive Polymers 0.000 abstract description 2
- 229920001296 polysiloxane Polymers 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000013464 silicone adhesive Substances 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
Landscapes
- Resistance Heating (AREA)
- Thermistors And Varistors (AREA)
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野コ 本発明は改良された正特性サーミスタ発熱体に関する。[Detailed description of the invention] [Industrial application fields] The present invention relates to an improved positive temperature coefficient thermistor heating element.
［従来の技術］
正特性サーミスタは室温で低い抵抗を持ち、ある一定温
度以上になると急激に抵抗が増大するので発熱量は減少
し温度は安定する。用途としては温風ヒータ、センサー
等広範囲に使用されている。[Prior Art] A positive temperature coefficient thermistor has a low resistance at room temperature, and when the temperature exceeds a certain level, the resistance increases rapidly, so the amount of heat generated decreases and the temperature becomes stable. It is used in a wide range of applications such as hot air heaters and sensors.
第１図は正特性サーミスタ発熱体を示す模式図である。FIG. 1 is a schematic diagram showing a positive temperature coefficient thermistor heating element.
正特性サーミスタ１は溶射等で設けられた正特性サーミ
スタ電極２と、アルミニウム放熱体４を絶縁性接着剤３
によって押圧しなから接着し電気的接合を行なっている
。電極としてアルミニウム板５に電圧か加えられること
によって正特性サーミスタの発熱か起こる。A positive temperature coefficient thermistor 1 includes a positive coefficient thermistor electrode 2 provided by thermal spraying, an aluminum heat sink 4, and an insulating adhesive 3.
Electrical bonding is achieved by pressing and adhering. The positive temperature coefficient thermistor generates heat by applying a voltage to the aluminum plate 5 as an electrode.
正特性サーミスタの発熱量を安定かつ増大させるにはア
ルミニウム放熱体と正特性サーミスタ電極とを電気的に
良好に接続する必要かある。しかし正特性サーミスタの
電極面は焼結体として得られた荒れた状態か研磨された
平滑な状態であり、従来の絶縁性接着剤によって正特性
サーミスタ電極とアルミニウム放熱体を加圧しなから接
着する方法では電極面の状態、接着剤の粘度や表面張力
などによって電気的接続を安定に信頼性良（行い管理す
ることは難しかった。In order to stabilize and increase the amount of heat generated by a PTC thermistor, it is necessary to have a good electrical connection between the aluminum heat sink and the PTC thermistor electrode. However, the electrode surface of a positive temperature coefficient thermistor is either rough obtained as a sintered body or polished and smooth, and the positive temperature coefficient thermistor electrode and aluminum heat sink are bonded together using a conventional insulating adhesive without applying pressure. With this method, it was difficult to maintain stable and reliable electrical connections depending on factors such as the condition of the electrode surface and the viscosity and surface tension of the adhesive.
［発明か解決しようとする課題］
本発明の目的は正特性サーミスタ電極とアルミニウム放
熱体とを電気的に信頼性良く安定接続した正特性サーミ
スタ発熱体を提供することである。[Problems to be Solved by the Invention] An object of the present invention is to provide a positive temperature coefficient thermistor heating element in which a positive temperature coefficient thermistor electrode and an aluminum heat sink are electrically and stably connected with each other with good reliability.
［課題を解決するだめの手段］
本発明は上記の目的を解決するため正特性サーミスタと
正特性サーミスタ電極とアルミニウム放熱体とからなる
正特性サーミスタ発熱体において、粒径６００μｍ以下
のアルミニウム粉末を５〜５０重量％含有する絶縁性接
着剤により該正特性サーミスタ電極と該アルミニウム放
熱体が接合してなることを特徴とする。[Means for Solving the Problems] In order to solve the above objects, the present invention provides a positive temperature coefficient thermistor heating element consisting of a positive temperature coefficient thermistor, a positive temperature coefficient thermistor electrode, and an aluminum heat sink, in which aluminum powder with a particle size of 600 μm or less is used. The positive temperature coefficient thermistor electrode and the aluminum heat sink are bonded to each other by an insulating adhesive containing ~50% by weight.
［作 用コ
本発明においてシリコンまたはエポキシ接着剤のような
絶縁性接着剤にアルミニウム粉末を含有させそれを用い
て正特性サーミスタ電極とアルミニウム放熱体を押圧接
着するとアルミニウム粉末かその隙間に入り込み、押圧
によっては塑性変形か起き電気的接触面積を増やす。ア
ルミニウム粉末の粒径か６００μｍを超えて大きくなる
と正特性サーミスタ電極とアルミニウム放熱体の間に隙
間か生しるので電気的接触に加え耐湿性にも問題てあり
不都合である。押圧接着の際の押圧力としてはアルミニ
ウム放熱体か変形しない程度とし５００〜１５００ｇ／
ｃｒｌ程度か望ましい。またアルミニウム粉の粒径か５
０μｍより小さ（なると飛散等によりアルミニウム粉の
取扱上５０〜３００μｍが望ましい。[Function] In the present invention, when an insulating adhesive such as silicone or epoxy adhesive contains aluminum powder and is used to press and bond a positive temperature coefficient thermistor electrode and an aluminum heat radiator, the aluminum powder gets into the gap and the press In some cases, plastic deformation occurs to increase the electrical contact area. If the particle size of the aluminum powder exceeds 600 .mu.m, a gap will be formed between the positive temperature coefficient thermistor electrode and the aluminum heat radiator, causing problems in electrical contact and moisture resistance, which is disadvantageous. The pressing force during pressure bonding should be 500 to 1500 g / 500 to 1,500 g / so that the aluminum heat sink does not deform.
CRL or so is desirable. Also, the particle size of aluminum powder is 5
It is smaller than 0 μm (50 to 300 μm is desirable in terms of handling of aluminum powder due to scattering etc.).
さらに絶縁性接着剤中のアルミニウム粉末の含有量は絶
縁性接着剤に対して５〜５０重量％とする。アルミニウ
ム粉含有量か５０重量％を越えると正特性サーミスタ電
極とアルミニウム放熱体とを抑圧接着した時に接着強度
が落ちてしまう。またアルミニウム粉末の含有量か５重
量％より少ない場合はアルミニウム粉末を入れる効果か
薄れ良好な電気的接触か得られなくなる。よってアルミ
ニウム粉末含有量は１０〜４０重量％か望ましい。Further, the content of aluminum powder in the insulating adhesive is 5 to 50% by weight based on the insulating adhesive. If the aluminum powder content exceeds 50% by weight, the adhesive strength will decrease when the positive temperature coefficient thermistor electrode and the aluminum heat radiator are bonded under pressure. If the content of aluminum powder is less than 5% by weight, the effect of adding aluminum powder will be weakened and good electrical contact will not be obtained. Therefore, the aluminum powder content is preferably 10 to 40% by weight.
［実施例コ
粒径５００．８００μｍの２種類のアルミニウム粉末を
正特性サーミスタ電極とアルミニウム放熱体を接着する
のに用いる絶縁性シリコン接着剤に対して各粒径におい
てアルミニウム粉末の含有量をそれぞれ変化させ、ロー
ルミルでアルミニウム粉末が均一に分散するよう混合し
た。次にサーミスタ電極及びアルミニウム放熱体に塗布
し、約５００ ｇ／ａｄの押圧力で押圧しなから１５０
°Ｃに保持されている乾燥話中て１時間乾燥を行ない接
着硬化させた。[Example 2] Two types of aluminum powder with a particle size of 500 and 800 μm were mixed with an insulating silicone adhesive used to bond a positive temperature coefficient thermistor electrode and an aluminum heat sink, and the content of aluminum powder was varied for each particle size. The mixture was mixed using a roll mill so that the aluminum powder was uniformly dispersed. Next, apply it to the thermistor electrode and aluminum heat sink, press it with a pressing force of about 500 g/ad, and then
The adhesive was cured by drying for 1 hour in a drying oven maintained at °C.
アルミニウムの粉末が５００μｍで接着剤中の含有量５
および１０重量％のものについて１５０°Ｃの押圧接着
を行ったが、正特性サーミスタ発熱体の電気的接触は良
好であった。The aluminum powder is 500μm and the content in the adhesive is 5
Pressure bonding at 150°C was performed for 10% by weight of the positive temperature coefficient thermistor, and the electrical contact of the positive temperature coefficient thermistor heating element was good.
一方、アルミニウムの粉末か８００μｍで接着剤中の含
有量６０重量％のもので、同様に行った場合は、正特性
サーミスタ電極とアルミニウム放熱体が剥離した。On the other hand, when the aluminum powder was 800 μm thick and contained 60% by weight in the adhesive and the same procedure was carried out, the positive temperature coefficient thermistor electrode and the aluminum heat sink were separated.
［発明の効果］
本発明により作成された正特性サーミスタ発熱体では正
特性サーミスタ電極とアルミニウム放熱体の電気的接続
を安定かつ良好に行なうことができた。[Effects of the Invention] In the PTC thermistor heating element produced according to the present invention, stable and good electrical connection between the PTC thermistor electrode and the aluminum heat radiator could be established.
第１図は通常の正特性サーミスタ発熱体を示す模式図で
ある。
１・・・正特性サーミスタ、２・・・正特性サーミスタ
電極、３・・・絶縁性接着剤、４・・・アルミニウム放
熱体、５・・・アルミニウム板。
特許出願人 住友金属鉱山株式会社FIG. 1 is a schematic diagram showing a typical positive temperature coefficient thermistor heating element. DESCRIPTION OF SYMBOLS 1... Positive temperature coefficient thermistor, 2... Positive temperature coefficient thermistor electrode, 3... Insulating adhesive, 4... Aluminum heat sink, 5... Aluminum plate. Patent applicant Sumitomo Metal Mining Co., Ltd.
Claims (1)
ウム放熱体とからなる正特性サーミスタ発熱体において
、粒径６００μｍ以下のアルミニウム粉末を５〜５０重
量％含有する絶縁性接着剤により該正特性サーミスタ電
極と該アルミニウム放熱体が接合していることを特徴と
する正特性サーミスタ発熱体。In a PTC thermistor heating element consisting of a PTC thermistor, a PTC thermistor electrode, and an aluminum heat sink, the PTC thermistor electrode and the aluminum are bonded together using an insulating adhesive containing 5 to 50% by weight of aluminum powder with a particle size of 600 μm or less. A positive temperature coefficient thermistor heating element characterized by a heat radiating element being joined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18937190A JPH0479181A (en) | 1990-07-19 | 1990-07-19 | Positive characteristic thermister exothermic body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18937190A JPH0479181A (en) | 1990-07-19 | 1990-07-19 | Positive characteristic thermister exothermic body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0479181A true JPH0479181A (en) | 1992-03-12 |
Family
ID=16240203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18937190A Pending JPH0479181A (en) | 1990-07-19 | 1990-07-19 | Positive characteristic thermister exothermic body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0479181A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010053654A (en) * | 2008-08-29 | 2010-03-11 | Ｙｋｋ Ａｐ株式会社 | Fittings and method for mounting the same |
-
1990
- 1990-07-19 JP JP18937190A patent/JPH0479181A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010053654A (en) * | 2008-08-29 | 2010-03-11 | Ｙｋｋ Ａｐ株式会社 | Fittings and method for mounting the same |
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