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Assembled ceramic electric thermo-couple

An assembled, thermocouple technology, used in measuring devices, measuring heat, thermometers with electrical/magnetic components directly sensitive to heat, etc., can solve the problem that ceramic thermocouples cannot work in high temperature environments for a long time.

Inactive Publication Date: 2005-07-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that existing ceramic thermocouples cannot work in high temperature environment for a long time, the present invention provides an assembled ceramic thermocouple that can work normally in high temperature environment, which includes tubular electrode 2, high temperature insulating layer 3 and rod electrodes 4, one of which is made of MoSi 2 The other electrode is made of SiC, the lower end of the tubular electrode 2 is closed, the lower end of the rod electrode 4 is inserted into the interior of the tubular electrode 2, and the lower end surface of the rod electrode 4 is connected to the inner bottom surface of the tubular electrode 2, A high-temperature insulating layer 3 is provided between the side of the rod-shaped electrode 4 and the inner wall of the tubular electrode 2, and an elastic sealing layer 5 is provided at the open end of the tubular electrode 2

Method used

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  • Assembled ceramic electric thermo-couple
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  • Assembled ceramic electric thermo-couple

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specific Embodiment approach 1

[0006] Specific implementation mode one: the following combination figure 1 To illustrate in detail, this embodiment includes a tubular electrode 2, a high-temperature insulating layer 3 and a rod-shaped electrode 4, wherein the rod-shaped electrode 4 is made of MoSi 2 The tubular electrode 2 is made of SiC, the lower end of the tubular electrode 2 is closed, the lower end of the rod electrode 4 is inserted into the interior of the tubular electrode 2, and the lower end surface of the rod electrode 4 is connected to the inner bottom surface of the tubular electrode 2, A high-temperature insulating layer 3 is provided between the side of the rod-shaped electrode 4 and the inner wall of the tubular electrode 2, and a high-temperature elastic silicon sealant 5 is poured into the sealing part of the upper end of the tubular electrode 2. The upper end of the tubular electrode 2 and the top of the rod-shaped electrode 4 are respectively provided There are signal output terminals 9, ...

specific Embodiment approach 2

[0007] Specific implementation mode two: the following combination figure 2 To be specific. The difference between this embodiment and Embodiment 1 is that a conductive connection layer 1 is added between the lower end surface of the rod-shaped electrode 4 and the inner bottom surface of the tubular electrode 2, and the conductive connection layer 1 is formed on the lower end surface of the rod-shaped electrode 4. and the inner bottom surface of the tubular electrode 2 using Ti 3 SiC 2 Welded. In this embodiment, due to the use of Ti between the two electrodes 3 SiC 2 Welding can ensure that the two electrodes in the present invention are measured in a high-temperature environment below 1600° C. and keep the two electrodes in good contact.

specific Embodiment approach 3

[0008] Specific embodiment three: The difference between this embodiment and specific embodiment one is that the conductive connection layer 1 added is coated with conductive platinum on the lower end surface of the rod-shaped electrode 4 and the inner bottom surface of the tubular electrode 2 after diamond grinding. Platinum metal cladding formed after the slurry was sintered at 900°C for 1 hour. This embodiment enables the present invention to perform measurements at a high temperature of 1800°C.

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Abstract

A modular ceramic thermocuple consists of bar electrode, tubular electrode and high temperature insulation layer. It is featured as inserting and connecting bottom end of bar electrode to tubular electrode with one closed end, setting insulation layer between the two electrodes and elastic sealing layer on topend of tubular electrode. It can also be formed by two bar electrodes with high-temperature insulation layer as one electrode made of MoSi2 and another made of SiC.

Description

Technical field: [0001] The invention relates to a novel ceramic thermocouple, in particular to an assembled ceramic thermocouple which can be used in a high-temperature environment. Background technique: [0002] Ceramics used in existing ceramic thermocouples include silicon carbide, titanium dioxide, boron carbide and carbon. Due to the oxidation of carbon, in an oxidizing environment, a thermocouple containing carbon can only be used in an environment below 500 ° C. Similarly, due to the oxidation of titanium dioxide, a thermocouple containing titanium dioxide can only be used in an oxidizing environment. 900 ° C, Thermocouples containing boron carbide are limited to a maximum temperature of 800°C in oxidizing environments. Also, in these high-temperature environments, carbon, titanium dioxide, or boron carbide must be protected with an inert gas, such as nitrogen. Even noble metal thermocouples (such as R-type and S-type thermocouples) specially designed for measuring...

Claims

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Application Information

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Patent Type & Authority Applications(China)
Inventor 邵文柱崔玉胜甄良李义春
Owner HARBIN INST OF TECH
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