Zirconium boride based composite ceramic material thermocouple and preparation method thereof

A complex-phase ceramic and zirconium boride-based technology is applied in the field of ceramic material thermocouples and their preparation, which can solve the problems of difficult application of thermocouples, and achieve the effects of improved temperature measurement range, good electrical conductivity and high sensitivity

Inactive Publication Date: 2012-07-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that existing thermocouples are difficult to apply in high-temperature oxidation environment and other harsh environments, and to provide a zirconium boride-based composite ceramic material thermocouple and its preparation method

Method used

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  • Zirconium boride based composite ceramic material thermocouple and preparation method thereof
  • Zirconium boride based composite ceramic material thermocouple and preparation method thereof
  • Zirconium boride based composite ceramic material thermocouple and preparation method thereof

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specific Embodiment approach 1

[0018] Specific Embodiment 1: A zirconium boride-based composite ceramic material thermocouple of this embodiment includes a positive electrode and a negative electrode; wherein, the positive electrode is composed of 30% to 95% ZrB by volume percentage 2 , 5% to 40% of SiC and 0 to 30% of additives, and the negative electrode is made of 60% to 95% of ZrB by volume 2 And 5%~40% SiC and 0~30% additives.

[0019] The advantages of this embodiment are: this embodiment adopts hot pressing sintering to reduce the voids in the material, and improve the material density, mechanical properties and oxidation resistance. At the same time, the reduction of the sintering temperature can also improve the production efficiency and reduce the cost. The material system of zirconium boride-silicon carbide and other additives used in this embodiment has good mechanical properties, oxidation resistance and corrosion resistance at high temperatures. At the same time, because the material system ...

specific Embodiment approach 2

[0021] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the additives are AlN, Si 3 N 4 , C, MoSi 2 , B 4 C, BN, Al 2 o 3 One or several of them are mixed in any ratio. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Specific embodiment three: the difference between this embodiment and specific embodiments one to two is: ZrB 2 The average particle size is 0.1-10 μm. Others are the same as the specific embodiment 1 to 2.

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Abstract

The invention discloses a zirconium boride based composite ceramic material thermocouple and a preparation method thereof, and relates to a ceramic material thermocouple and a preparation method thereof. The invention solves the problem that the existing thermocouple is difficult to apply in a high-temperature oxidative environment and other severe environments. The zirconium boride based composite ceramic material thermocouple consists of a positive electrode and a negative electrode. The preparation method comprises the following steps of: 1, weighing ZrB2, SiC and an additive, and preparing the positive electrode by hot pressing sintering; 2, weighing ZrB2, SiC and the additive, and preparing the negative electrode by hot pressing sintering; and 3, assembling the positive electrode and the negative electrode into the thermocouple. The thermocouple has high sensitivity, and the sensitivity of the thermocouple is in a range from 1 to 100mu V/DEG C; the thermocouple can be measured at the temperature of between 500 and 2,000 DEG C; and use of scarce resources is reduced, and the cost is reduced. The zirconium boride based composite ceramic material thermocouple is applied to the field of high-temperature measurement.

Description

technical field [0001] The invention relates to a ceramic material thermocouple and a preparation method thereof. Background technique [0002] Pyrometry technology is widely used in metallurgy, steel, building materials, chemistry, aviation, aerospace and other fields. Temperature is an important parameter to ensure smooth production and quality control. Therefore, accurate temperature measurement in the production process is of great significance to guide the normal production. [0003] At present, there are mainly two methods of high temperature measurement: infrared radiation measurement and contact temperature measurement. Radiation temperature measurement is mainly based on the law of black body radiation. To obtain the actual temperature, the emissivity of the material needs to be corrected. At present, the commonly used infrared radiation thermometer is to obtain the temperature value by measuring the thermal radiation of high-temperature objects. The temperature ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/58C04B35/622
Inventor 张幸红王鹏韩文波洪长青胡平薛忠刚
Owner HARBIN INST OF TECH
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