Thick-film thermocouple for quickly measuring temp of molten steel and its making method

A manufacturing method and technology of thermocouples, which are applied to thermoelectric devices, measure heat, and use electrical devices, etc., can solve the problems of high consumption of precious metal materials, low product reliability, and increased operation difficulty, and achieve the realization of mechanized operation, simple structure, The effect of reducing production costs

Inactive Publication Date: 2004-03-31
CHONGQING MATERIALS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The whole process is completely manual operation, with high labor intensity and low production efficiency. In order to reduce the consumption of precious metal materials, 0.07mm or thinner wire is generally used, which further increases the difficulty of operation.
[0005] 2. The consumption of precious metal materials is large and the cost is high
[0006] 3. Due to the manual operation, false welding is inevitable, and the product reliability is low

Method used

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  • Thick-film thermocouple for quickly measuring temp of molten steel and its making method
  • Thick-film thermocouple for quickly measuring temp of molten steel and its making method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1: make the positive pole of thick-film thermocouple with pure platinum slurry, make the negative pole of thick-film thermocouple with platinum-rhodium slurry containing 10.5% rhodium, and sinter into thick-film platinum at a temperature of 1200°C Rhodium thermocouple, its technical parameters are in full compliance with the temperature-thermoelectric potential characteristics of standard S-type industrial thermocouple (wire material).

Embodiment 2

[0035] Embodiment 2: make the positive pole of thick-film thermocouple with pure platinum slurry, make the negative pole of thick-film thermocouple with the platinum-rhodium slurry that contains rhodium content 13.7%, sinter at the temperature of 1250 ℃~1300 ℃ Thick-film platinum-rhodium thermocouple, its technical parameters are in full compliance with Pt-PtRh 13 Temperature-thermoelectric potential characteristics of industrial thermocouples (wires).

Embodiment 3

[0036] Embodiment 3: be that the positive electrode of thick-film thermocouple is made with the platinum-rhodium slurry that contains rhodium of 6%, be that the negative pole of thick-film thermocouple is made with the platinum-rhodium slurry that contains rhodium of 31%, at 1350 ℃~ Thick-film platinum-rhodium thermocouples are sintered at a temperature of 1400°C, and their technical parameters fully comply with the temperature-thermoelectric potential characteristics of standard B-type industrial thermocouples (wires).

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Abstract

A thick-film thermocouple for quickly measuring the temp. of molten steel is made up of superfine Pt powder and Rh powder or Pt-Rh alloy powder through mixing with glass powder and transparent thick liquid to obtain print slurry, then silk screen printing on ceramic substrate, after baking, high-temp. sintering, and soldering two compensating lines on the thick film temp.-sensing bulb. Its advantages include simple structure, high stability and reliability, high productivity, and low cost.

Description

(1) Technical field [0001] The invention relates to a thermocouple and a manufacturing method thereof, in particular to a thick-film type thermocouple for measuring molten steel temperature and a manufacturing method thereof. (2) Technical background [0002] The temperature measurement of molten steel is a key link in the steelmaking process to control the composition of materials and ensure the quality of smelting. At present, the fast thermocouples used for temperature measurement of molten steel in my country's metallurgical industry are mainly divided into two categories: fast platinum-rhodium thermocouples and fast tungsten-rhenium thermocouples; due to the earlier production time of platinum-rhodium thermocouples, stable and reliable technology and most steel mills At present, platinum-rhodium fast thermocouples for molten steel temperature measurement still occupy an absolute dominant market share, reaching more than 70%. my country is a country poor in platinum and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K7/04G01K7/16H01L35/28H01L37/00
Inventor 杨机贵
Owner CHONGQING MATERIALS RES INST
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