JP2798297B2 - Pt alloy strand for resistance temperature detector - Google Patents
Pt alloy strand for resistance temperature detectorInfo
- Publication number
- JP2798297B2 JP2798297B2 JP22899590A JP22899590A JP2798297B2 JP 2798297 B2 JP2798297 B2 JP 2798297B2 JP 22899590 A JP22899590 A JP 22899590A JP 22899590 A JP22899590 A JP 22899590A JP 2798297 B2 JP2798297 B2 JP 2798297B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature detector
- resistance temperature
- alloy
- alloy strand
- resistance
- 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 - Lifetime
Links
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、測温抵抗体用Pt合金素線に係り、特に新JI
S（日本工業規格）に適応するPt合金素線の製造に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a Pt alloy element wire for a resistance temperature detector, and particularly to a new JI.
This is related to the production of Pt alloy wires conforming to S (Japanese Industrial Standard).
（従来技術と課題） 旧JISでは、０℃と100℃の電気抵抗比即ちR100/R0（1
00℃の抵抗値をR100、０℃の抵抗値をR0）＝1.3916±0.
15％である超高純度Pt素線（純度99.999％以上）が用い
られていたが、今般JISの改訂にともないR100/R0＝1.38
50±0.2％となりこの規格を満たす測温抵抗体用材料が
要求されるに至った。(Prior art and problems) In the old JIS, the electrical resistance ratio between 0 ° C and 100 ° C, that is, R 100 / R 0 (1
The resistance at 00 ° C is R 100 , and the resistance at 0 ° C is R 0 ) = 1.3916 ± 0.
While ultra-high purity Pt wire (99.999% or more) has been used is 15%, with the revision of recent JIS R 100 / R 0 = 1.38
It became 50 ± 0.2%, and a material for a RTD meeting this standard was required.
この電気抵抗比を下げるにはPtに他の元素を適量合金
添加することによる方法があるが、元素によっては、
使用時酸化する。Ptと完全に均一に固溶しなかった
り、折出したりする。使用時、相変態が起こる等の為
一定で安定した電気抵抗比が得られない等の問題があ
る。There is a method of lowering this electric resistance ratio by adding an appropriate amount of another element alloy to Pt, but depending on the element,
Oxidizes during use. It does not form a solid solution with Pt completely, or it breaks out. During use, there is a problem that a constant and stable electric resistance ratio cannot be obtained due to phase transformation or the like.
（発明の目的） 本発明は、上記課題を解決する為になされたもので、
Ptに微量の他の元素を含有させることにより一定で安定
したR100/R0＝1.3850±0.2％を満たす測温抵抗体用Pt合
金素線を提供するものである。(Object of the Invention) The present invention has been made to solve the above problems,
An object of the present invention is to provide a Pt alloy strand for a resistance bulb that satisfies a constant and stable R 100 / R 0 = 1.3850 ± 0.2% by including a trace amount of another element in Pt.
（構成） 上記課題を解決する為の本発明の技術的手段は、Pdを
0.01〜0.1％、残余をPtとしたPt合金としたことを特徴
とするものである。(Structure) The technical means of the present invention for solving the above-mentioned problems includes Pd
It is a Pt alloy with 0.01 to 0.1% and the balance being Pt.
（作用） 上記のように構成された本発明の測温抵抗体用Pt合金
素線において、Pdを0.01〜0.1％含有させることによりR
100/R0＝1.3850±0.2％の電気抵抗比を満たすことがで
き、また、PdはPtと均一、安定に固溶し、酸化や相変態
することもなく、更に加工性も良く、揮発、飛散もない
ことから微量添加精度が高く、またPtPd合金は測温抵抗
体用以外に広く用いられているので、転用も容易で生産
上も有利なものである。(Action) In the Pt alloy strand for a resistance temperature detector of the present invention configured as described above, by containing 0.01 to 0.1% of Pd, R
100 / R 0 = 1.3850 ± 0.2% electric resistance ratio can be satisfied, and Pd dissolves uniformly and stably with Pt, does not undergo oxidation or phase transformation, and has good processability, volatilization, Since there is no scattering, the addition accuracy of the trace amount is high, and since the PtPd alloy is widely used for purposes other than the resistance bulb, it can be easily diverted and is advantageous in production.
（実施例） 以下に実施例と従来例について説明する。(Examples) Examples and conventional examples will be described below.
まず、実施例として純度99.999％の高純度Pt（R100/R
0＝1.3916）及びそのPtにPd（純度99.9％）を添加合金
して、それらについてのR100/R0の電気抵抗比について
調べた結果、以下の表を得た。First, as an example, high-purity Pt (R 100 / R
0 = 1.3916) and its Pt alloyed with Pd (purity 99.9%), and the electrical resistance ratio of R 100 / R 0 was examined for them. The following table was obtained.
上記の結果から明らかなように、比較例１及び２のPd
0.005％で残余がPtのもの及びPdが0.20％で残余がPtの
ものはR100/R0＝1.3850±0.2％からはずれてしまうのに
対し実施例１〜３のPdが0.01〜0.10％で残余がPtのもの
においてR100/R0＝1.38777〜1.38223を満たすものであ
った。また、加工性も良く、一定で安定した電気抵抗比
が得られるものであった。 As is clear from the above results, the Pd
In the case of 0.005% and the residue of Pt, and the case of Pd of 0.20% and the residue of Pt, the deviation from R 100 / R 0 = 1.3850 ± 0.2%, whereas the Pd in Examples 1 to 3 was 0.01 to 0.10%. remainder was fulfills R 100 / R 0 = 1.38777~1.38223 in those Pt. Further, the workability was good and a constant and stable electric resistance ratio was obtained.
（発明の効果） 以上のように、本発明の測温抵抗体用Pt合金素線によ
れば、Ptと均一、安定に固溶し、酸化や相変態すること
もなく、更に加工性も良く、揮発、飛散もないことから
微量添加精度が高く、従って一定で安定したR100/R0＝
1.3850±0.2％の測温抵抗体が得られるという優れた効
果を有するものである。(Effects of the Invention) As described above, according to the Pt alloy strand for a resistance temperature detector of the present invention, it forms a solid solution uniformly and stably with Pt, does not undergo oxidation or phase transformation, and has good workability. Since there is no volatilization or scattering, the accuracy of adding small amounts is high, and therefore, a constant and stable R 100 / R 0 =
It has an excellent effect that a resistance temperature detector of 1.3850 ± 0.2% can be obtained.
Claims (1)
したことを特徴とする測温抵抗体用Pt合金素線。1. A Pt alloy strand for a resistance temperature detector, comprising a Pt alloy having a Pd content of 0.01 to 0.1% and a balance of Pt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22899590A JP2798297B2 (en) | 1990-08-30 | 1990-08-30 | Pt alloy strand for resistance temperature detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22899590A JP2798297B2 (en) | 1990-08-30 | 1990-08-30 | Pt alloy strand for resistance temperature detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04110624A JPH04110624A (en) | 1992-04-13 |
| JP2798297B2 true JP2798297B2 (en) | 1998-09-17 |
Family
ID=16885114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22899590A Expired - Lifetime JP2798297B2 (en) | 1990-08-30 | 1990-08-30 | Pt alloy strand for resistance temperature detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2798297B2 (en) |
-
1990
- 1990-08-30 JP JP22899590A patent/JP2798297B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04110624A (en) | 1992-04-13 |
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