JPS588122B2 - high temperature thermal element - Google Patents
high temperature thermal elementInfo
- Publication number
- JPS588122B2 JPS588122B2 JP1126278A JP1126278A JPS588122B2 JP S588122 B2 JPS588122 B2 JP S588122B2 JP 1126278 A JP1126278 A JP 1126278A JP 1126278 A JP1126278 A JP 1126278A JP S588122 B2 JPS588122 B2 JP S588122B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- high temperature
- added
- thermal element
- temperature thermal
- 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.)
- Expired
Links
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
- Thermistors And Varistors (AREA)
Description
【発明の詳細な説明】
本発明は高温で負荷に対して安定した高温感熱素子を得
るためのものである。DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to obtaining a high temperature thermal element that is stable under load at high temperatures.
最近はエレクトロニクスおよびその関連分野の発達に伴
ない、１０００℃付近の温度範囲で使用可能なサーミス
タ材料、例えばスピネル結晶系、ヘロブスカイト結晶系
、ＺｒＯ２−Ｙ２Ｏ３系材料の実用化が検討されている
。Recently, with the development of electronics and related fields, the practical use of thermistor materials that can be used in a temperature range around 1000° C., such as spinel crystal, herovskite crystal, and ZrO2-Y2O3 materials, is being considered.
一例として、近年自動車の排気ガス対策として、自動車
の排気ガス（一酸化炭素・窒素酸化物・炭化水素）を完
全燃焼させて排出させるために、触媒装置が使用されて
いる。As an example, in recent years, as a measure against automobile exhaust gas, catalyst devices have been used to completely burn and exhaust automobile exhaust gas (carbon monoxide, nitrogen oxides, hydrocarbons).
そして、この触媒装置の温度が異常に高温になることを
防ぐために、装置内の温度検出が必要である。In order to prevent the temperature of this catalyst device from becoming abnormally high, it is necessary to detect the temperature inside the device.
この装置であるサーマルリアクタ一温度検出が最近は普
及している。This device, which detects the temperature of a thermal reactor, has recently become popular.
従来より使用されているスピネル結晶系サーミスタ材料
、ＭｇＯ−Ａｌ２Ｏ３−Ｃｒ２Ｏ３−Ｆｅ２Ｏ３系につ
いては、高温負荷に対して極く限定された範囲でしか安
定領域はなく、安定して製造することが困難なものであ
った。The conventionally used spinel crystal thermistor material, MgO-Al2O3-Cr2O3-Fe2O3, has a stable range only within a very limited range under high-temperature loads, making it difficult to manufacture stably. It was something.
本発明はこのような欠点を除いて高温負荷に対して安定
な特性を示す高温感熱素子を提供しようとするものであ
る。It is an object of the present invention to provide a high-temperature heat-sensitive element that eliminates these drawbacks and exhibits stable characteristics against high-temperature loads.
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、主成分であるＭｇ（ＡｌｘＣｒｙＦｅｚ）２Ｏ４
〔ｘ＋ｙ＋ｚ＝１．ｘ；０．３〜０．４．ｙ；０．５〜
０．６．ｚ；０．１〜０．２〕に対してＺｒＯ２をモル
比で１００：１添加して、窯業的手段を用いて混合、仮
焼、粉砕を行い、乾燥後ポリビニルアルコールを加えて
造粒し、白金線を埋込み、第１図に示すような形状に成
形する。First, the main component Mg(AlxCryFez)2O4
[x+y+z=1. x; 0.3-0.4. y; 0.5~
0.6. Z; 0.1 to 0.2], ZrO2 was added in a molar ratio of 100:1, mixed, calcined, and crushed using ceramic means, and after drying, polyvinyl alcohol was added and granulated. , a platinum wire is embedded and formed into the shape shown in FIG.
第１図で１は焼成前のサーミスタ、２は白金線である。In FIG. 1, 1 is a thermistor before firing, and 2 is a platinum wire.
成形した後、焼成温度１６００℃以上で３〜５時間焼成
する。After shaping, it is fired at a firing temperature of 1600°C or higher for 3 to 5 hours.
こうして得たサーミスタの９００’Ｃ中での抵抗値は第
２図に示すＡ，Ｂ，Ｃの範囲に囲まれた三角形の部分で
ある。The resistance value of the thermistor thus obtained at 900'C is the triangular part surrounded by ranges A, B, and C shown in FIG.
ｘ：０．３〜０．４，Ｙ；０．５〜０．６，ｚ；０．１
〜０．２からずれてくると、抵抗値がいずれも高くなり
すぎて実用上好ましくない。x: 0.3-0.4, Y; 0.5-0.6, z; 0.1
If it deviates from ~0.2, the resistance values become too high, which is not practical.
また、一例として多くの試料の中から得られたサーミス
タ素体の温度−抵抗値特性を第３図に示しており、Ｂ定
数の直線性は少しずれているが実用上問題はない。Further, as an example, the temperature-resistance characteristics of the thermistor elements obtained from many samples are shown in FIG. 3, and although the linearity of the B constant is slightly off, there is no problem in practical use.
つぎに、ＺｒＯ２の添加量を変化させて、その時の高温
負荷寿命による抵抗値の変化率を調べた。Next, the amount of ZrO2 added was varied and the rate of change in resistance value due to high temperature load life was investigated.
その結果を第４図に示す。The results are shown in FIG.
その結果、ＺｒＯ２を添加しない場合は高温負荷におけ
る抵抗値の変化率は著しく大きい。As a result, when ZrO2 is not added, the rate of change in resistance value under high temperature load is significantly large.
また、添加量が多くなると次第に抵抗値の変化率が大き
くなり、モル比で主成分に対して１００：５以上になる
と変化率は１０％近く変化して添加効果は小さくなる。Furthermore, as the amount added increases, the rate of change in resistance value gradually increases, and when the molar ratio to the main component exceeds 100:5, the rate of change changes by nearly 10%, and the effect of addition becomes small.
さらに、主成分に対してモル比でＺｒＯ２を１００：０
．１〜５．０添加し焼結させた数多くの試料の中から、
一例として９００℃，ＤＣ３Ｖ，１０００℃，ＤＣ２Ｖ
印加して１０００時間までの経時変化を調べた。Furthermore, the molar ratio of ZrO2 to the main component was 100:0.
．． Among the many samples sintered with 1 to 5.0 added,
As an example, 900℃, DC3V, 1000℃, DC2V
Changes over time were investigated for up to 1000 hours after application.
その結果を第５図、第６図に示す。以上のことから、従
来より使用されているスピネル結晶型ＭｇＯ−Ａｌ２Ｏ
３−Ｃｒ２Ｏ３−Ｆｅ２Ｏ３系サーミスタ材料にＺｒＯ
２を添加することにより高温負荷寿命は著しく向上する
。The results are shown in FIGS. 5 and 6. From the above, the conventionally used spinel crystal type MgO-Al2O
3-Cr2O3-Fe2O3-based thermistor material with ZrO
By adding 2, the high temperature load life is significantly improved.
したがって、十分に実用に耐える高温感熱素子を提供す
ることができる。Therefore, it is possible to provide a high-temperature heat-sensitive element that is sufficiently durable for practical use.
第１図は本発明に係る高温感熱素子の製造途中の一例を
示す正面図、第２図は同素子の組成−抵抗値の関係を示
す特性図、第３図は同素子の一例における温度−抵抗値
特性を示す図、第４図は同素子の高温耐久におけるＺｒ
Ｏ２添加量と抵抗値変化率との関係を示す図、第５図お
よび第６図は同素子の高温負荷耐久におけるそれぞれ９
００℃・ＤＣ３Ｖ，１０００℃−ＤＣ２Ｖの経時変化を
示す図である。FIG. 1 is a front view showing an example of a high-temperature heat-sensitive element according to the present invention during manufacture, FIG. 2 is a characteristic diagram showing the relationship between the composition and resistance of the element, and FIG. 3 is a temperature-resistance diagram of an example of the element. A diagram showing the resistance value characteristics, Figure 4 shows the resistance of Zr during high temperature durability of the same element.
Figures 5 and 6, which show the relationship between the amount of O2 added and the rate of change in resistance value, show the relationship between the amount of O2 added and the rate of change in resistance value, respectively.
It is a figure which shows the temporal change of 00 degreeC-DC3V and 1000 degreeC-DC2V.
Claims (1)
ｌ２Ｏ３−Ｃｒ２Ｏ３−Ｆｅ２Ｏ３系固溶体に、モル比
で副成分としてＺｒＯ２を１００：０．１〜５．０添加
して焼結させることを特徴とする高温感熱素子。1 MgO-A with spinel crystal structure as main component
A high-temperature heat-sensitive element characterized in that ZrO2 is added as a subcomponent at a molar ratio of 100:0.1 to 5.0 to a l2O3-Cr2O3-Fe2O3-based solid solution and sintered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1126278A JPS588122B2 (en) | 1978-02-02 | 1978-02-02 | high temperature thermal element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1126278A JPS588122B2 (en) | 1978-02-02 | 1978-02-02 | high temperature thermal element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54104599A JPS54104599A (en) | 1979-08-16 |
| JPS588122B2 true JPS588122B2 (en) | 1983-02-14 |
Family
ID=11773028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1126278A Expired JPS588122B2 (en) | 1978-02-02 | 1978-02-02 | high temperature thermal element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS588122B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69500411T2 (en) * | 1994-04-27 | 1997-10-23 | Matsushita Electric Ind Co Ltd | Temperature sensor |
| US6306315B1 (en) | 1998-02-27 | 2001-10-23 | Denso Corporation | Thermistor device thermistor device manufacturing method and temperature sensor |
-
1978
- 1978-02-02 JP JP1126278A patent/JPS588122B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54104599A (en) | 1979-08-16 |
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