JPH01232702A - Thermistor element - Google Patents
Thermistor elementInfo
- Publication number
- JPH01232702A JPH01232702A JP5995288A JP5995288A JPH01232702A JP H01232702 A JPH01232702 A JP H01232702A JP 5995288 A JP5995288 A JP 5995288A JP 5995288 A JP5995288 A JP 5995288A JP H01232702 A JPH01232702 A JP H01232702A
- Authority
- JP
- Japan
- Prior art keywords
- contained
- thermistor element
- thermistor
- mol
- composition
- 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
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 7
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 abstract description 7
- 239000000203 mixture Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 229910052749 magnesium Inorganic materials 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 239000011572 manganese Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000011324 bead Substances 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 229910000314 transition metal oxide Inorganic materials 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229940062993 ferrous oxalate Drugs 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- OWZIYWAUNZMLRT-UHFFFAOYSA-L iron(2+);oxalate Chemical compound [Fe+2].[O-]C(=O)C([O-])=O OWZIYWAUNZMLRT-UHFFFAOYSA-L 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 229960001708 magnesium carbonate Drugs 0.000 description 1
- 239000011656 manganese carbonate Substances 0.000 description 1
- 229940093474 manganese carbonate Drugs 0.000 description 1
- 235000006748 manganese carbonate Nutrition 0.000 description 1
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 description 1
- XMWCXZJXESXBBY-UHFFFAOYSA-L manganese(ii) carbonate Chemical compound [Mn+2].[O-]C([O-])=O XMWCXZJXESXBBY-UHFFFAOYSA-L 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
Landscapes
- Thermistors And Varistors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は中高温下の安定性に優れたサーミスタ素子に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thermistor element with excellent stability under medium and high temperatures.
従来より肚、 Ｃｏ、 Ｎｉなとの遷移金属酸化物の焼
結体を用いたサーミスタ素子が知られている。BACKGROUND ART Thermistor elements using sintered bodies of transition metal oxides such as Co, Co, and Ni have been known.
これ゛らＮｉ、 Ｃｏ、 Ｍｎなどの遷移金属酸化物焼
結体によればＢ定数に２０００〜５０００程度の値、室
温付近で１℃の温度変化に対して抵抗値が２〜５％変化
する抵抗温度特性のサーミスタ素子が得られる。These sintered transition metal oxides such as Ni, Co, and Mn have a B constant of about 2,000 to 5,000, and a resistance value that changes by 2 to 5% for a temperature change of 1°C near room temperature. A thermistor element with resistance-temperature characteristics is obtained.
このサーミスタを用いれば抵抗変化を測定して１１１０
０’Ｃ，程度の温度を測定することができ、室温付近で
の温度センサーとして多用されている。If you use this thermistor, you can measure the resistance change and get 1110
It can measure temperatures of around 0'C, and is often used as a temperature sensor near room temperature.
しかしながら、 Ｍｎ、 Ｃｏ、 Ｎｉなどの遷移金属
酸化物の焼結体を用いたサーミスタによれば、２５０°
Ｃを越える中高温以上では抵抗変化率が大きくなり、寿
命特性に劣るという問題がある。２５０’Ｃを越える中
高温以上の温度条件の下で温度検出を行う必要性は電気
炉などの工業分野、自動車の排気ガス温度測定などのほ
か、一般家電製品では石油又はガスファンヒータなどの
温度測定に見られ、このような高温用のサーミスタ素子
として、Ｃｏ０−ＺｒＯ。However, according to a thermistor using a sintered body of transition metal oxides such as Mn, Co, and Ni, the angle of 250°
At medium to high temperatures exceeding C or higher, the rate of change in resistance becomes large and there is a problem that the life characteristics are poor. Temperature detection under medium-high temperature conditions exceeding 250'C is necessary in industrial fields such as electric furnaces, exhaust gas temperature measurement of automobiles, and in general home appliances such as oil or gas fan heaters. Co0-ZrO was found in the measurements as a thermistor element for such high temperatures.
系、 Ｃｏ０−Ｍｎ０−ＡＱｃ、ｏ、系などのサーミス
タ素子が知られているが、これらは６００°Ｃ以上の高
温下での使用に適したものであり、また、使用状況によ
っては雰囲気の影響を受けて組成が変化し、安定性に欠
けるという問題がある。Thermistor elements such as Co0-Mn0-AQc,o, and Co0-Mn0-AQc,o, are known, but these are suitable for use at high temperatures of 600°C or higher, and depending on the usage conditions, they may be affected by the atmosphere. There is a problem that the composition changes as a result of the exposure, resulting in a lack of stability.
従来はこの問題を解決するため、専ら、表面コーティン
グなどの構造面の改善が試みられていた。In order to solve this problem, attempts have traditionally been made to improve the structure, such as surface coating.
本発明の目的は３００〜４５０℃の中高温の温度領域に
おいて、素子自体の抵抗変化率が小さく、しかも寿命特
性に優れたサーミスタ素子を提供することにある。An object of the present invention is to provide a thermistor element which has a small rate of change in resistance of the element itself in a medium to high temperature range of 300 to 450 DEG C. and has excellent life characteristics.
上記目的を達成するため、本発明のサーミスタ素子にお
いては、ＭｇＯを主成分とする金属酸化物焼結体からな
り、組成の元素成分としてＭＪＣを２０〜９０モル％、
Ｍｎを２〜５５モル％、 Ｆｅを０．０１〜６０モル％
含むものである。元素成分としてＦｅは必ずしも含まな
くてもよい。Ｆｅを含まないときには組成の元素成分と
してＭｇを４５〜９０モル％、 Ｍｎを１０〜５０モル
％を含む。In order to achieve the above object, the thermistor element of the present invention is made of a metal oxide sintered body mainly composed of MgO, and contains 20 to 90 mol% of MJC as an elemental component of the composition.
2 to 55 mol% Mn, 0.01 to 60 mol% Fe
It includes. Fe does not necessarily have to be included as an elemental component. When Fe is not included, the composition contains 45 to 90 mol% Mg and 10 to 50 mol% Mn as elemental components.
ＭｇＯは耐熱構造材料として知られる構成成分である。MgO is a component known as a heat-resistant structural material.
ＭＥの元素成分を主体とし、この軸にＭｎとＦａの元素
成分をある範囲で添加して焼結した三成分系金属酸化物
焼成体又はｈににｎをある範囲で添加した二成分系の金
属酸化物焼結体は、 ３００〜４５０℃の中高温の温度
領域において、優れた抵抗変化率の安定性が得られる。A ternary metal oxide sintered body is mainly composed of the elemental component of ME, and the elemental components of Mn and Fa are added within a certain range to the axis, or a two-component system is created by adding n to h within a certain range. The metal oxide sintered body exhibits excellent resistance change rate stability in the medium to high temperature range of 300 to 450°C.
以下に本発明の詳細な説明する９
炭酸マグネシウム、炭酸マンガン、蓚酸第一鉄の各粉末
を秤量し、各々定量をボールミルに投入して約１６時間
混合した。これを乾燥後役９００°Ｃで１６時間仮焼を
し、その粉末をさらにボールミルで混合粉砕後乾燥させ
て酸化物粉末を得た。この酸化物粉末にポリビニルブチ
ラールを含むブチルカルピトールアセテート溶液を加え
、ペースト状に加工し、このペーストを公知の方法によ
り平行に張った２本の白金線上に塗布してビード型に成
形した。乾燥後、このビードを空気中で約１３５０℃に
加熱して１時間焼成し、各ビード間で白金線を切断する
ことによってビード型サーミスタ素子に加工した。The present invention will be described in detail below.9 Magnesium carbonate, manganese carbonate, and ferrous oxalate powders were weighed, and a fixed amount of each powder was put into a ball mill and mixed for about 16 hours. After drying, this was calcined at 900°C for 16 hours, and the powder was further mixed and ground in a ball mill and dried to obtain an oxide powder. A butylcarpitol acetate solution containing polyvinyl butyral was added to this oxide powder, processed into a paste, and this paste was applied by a known method onto two platinum wires stretched in parallel to form a bead shape. After drying, the beads were fired in air at about 1350° C. for 1 hour, and the platinum wire was cut between each bead to form a bead-type thermistor element.
上記のビード型サーミスタ素子を鉄クロム線にスポット
溶接したのちガラス封入後、５００°Ｃで約８時間熱処
理し、ビード型サーミスタを得た。The above bead-type thermistor element was spot-welded to an iron-chrome wire, sealed in glass, and then heat-treated at 500°C for about 8 hours to obtain a bead-type thermistor.
このようにして得られたビード型サーミスタの電気的特
性を測定した。第１表に実施例１〜７の配合比と２５０
℃での抵抗値、Ｂ定数及び４００℃における放置試験で
の１０００時間後の抵抗変化率を示した。いずれの場合
も抵抗変化率は８％以下と小さく、特に実施例１〜５で
は３％以下と極めて小さく、寿命特性において優れてい
る。The electrical characteristics of the bead type thermistor thus obtained were measured. Table 1 shows the blending ratio of Examples 1 to 7 and 250
The resistance value at °C, the B constant, and the rate of change in resistance after 1000 hours in a standing test at 400 °C are shown. In any case, the resistance change rate is as small as 8% or less, and particularly in Examples 1 to 5, it is extremely small as 3% or less, and the life characteristics are excellent.
本発明によるサーミスタとの比較のため、比較例として
、 Ｍｇ２０〜９０モル％、Ｍｎ２〜５５モル％、 Ｆ
ｅ０〜６０モル％の範囲をこえるものの２５０’ Ｃで
の抵抗値、Ｂ定数及び４００’ Ｃにおける放置試験で
の１０００時間後の抵抗変化率を第２表に示す。いずれ
も抵抗変化率が大きく、寿命特性が悪くなっている。For comparison with the thermistor according to the present invention, as a comparative example, Mg20-90 mol%, Mn2-55 mol%, F
Table 2 shows the resistance value at 250'C, the B constant, and the rate of change in resistance after 1000 hours in a standing test at 400'C, even though the range of e0 to 60 mol% was exceeded. Both have large resistance change rates and poor life characteristics.
（以下余白）
第 １ 表
第 ２ 表
〔発明の効果〕
以上のように本発明によるときには特に３００〜４５０
℃の中高温領域において、素子自体が抵抗温度特性の安
定性を有し、しかも寿命特性に優れたサーミスタが得ら
れ、したがって、中高温領域での温度検知、特に、石油
、ガスファンヒータなどの焼成を伴う機器類の温度セン
サーに用いて優れた効果を得ることができる。(Hereinafter, blank space) Table 1 Table 2 [Effects of the invention] As described above, in accordance with the present invention, especially 300 to 450
The device itself has stable resistance-temperature characteristics in the medium to high temperature range of °C, and a thermistor with excellent life characteristics can be obtained. Excellent effects can be obtained when used in temperature sensors for equipment that involves firing.
特許出願人 株式会社大泉製作所 代理人 弁理士菅野 中、・′、□］゛。Patent applicant: Oizumi Seisakusho Co., Ltd. Agent: Patent attorney Naka Kanno,・′,□】゛.
、ノ,of
Claims (2)
組成の元素成分としてＭｇを２０〜９０モル％、Ｍｎを
２〜５５モル％、Ｆｅを０．０１〜６０モル％含むこと
を特徴とするサーミスタ素子。1. Consisting of a metal oxide sintered body whose main component is MgO,
A thermistor element comprising 20 to 90 mol% of Mg, 2 to 55 mol% of Mn, and 0.01 to 60 mol% of Fe as elemental components.
組成の元素成分としてＭｇを４５〜９０モル％、Ｍｎを
１０〜５５モル％含むことを特徴とするサーミスタ素子
。2. Consisting of a metal oxide sintered body whose main component is MgO,
A thermistor element comprising 45 to 90 mol% of Mg and 10 to 55 mol% of Mn as elemental components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5995288A JPH01232702A (en) | 1988-03-14 | 1988-03-14 | Thermistor element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5995288A JPH01232702A (en) | 1988-03-14 | 1988-03-14 | Thermistor element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01232702A true JPH01232702A (en) | 1989-09-18 |
Family
ID=13127989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5995288A Pending JPH01232702A (en) | 1988-03-14 | 1988-03-14 | Thermistor element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01232702A (en) |
-
1988
- 1988-03-14 JP JP5995288A patent/JPH01232702A/en active Pending
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