Preparation method of zirconium carbide composite ceramic temperature sensor

Abstract

The invention relates to a preparation method of a zirconium carbide composite ceramic temperature sensor. The preparation method comprises the following steps: (1) uniformly mixing zirconium carbide powder with a proper amount of additive, adding a solvent, and performing ball milling in a ball mill to obtain a mixture; (2) drying the mixture in a rotary evaporator, and screening by a 50-200-mesh sieve to obtain pre-sintered mixed powder; (3) putting the pre-sintered mixed powder into a mould, and performing hot pressing sintering in vacuum or inert atmosphere; (4) linearly cutting blocky ceramic obtained by pre-sintering to form the sensor with required size and shape. The temperature sensor is high in mechanical strength, difficult to deform and volatilize at high temperature and stable in electrical performance, is capable of accurately measuring the temperature of an ultrahigh-temperature environment with temperature of less than 3000 DEG C in vacuum or protection atmosphere, is a temperature sensing element capable of measuring highest temperature in contact sensors, and has important application meaning in the field of ultrahigh-temperature measurement instruments and equipment.

Description

technical field [0001] The invention relates to the technical field of temperature sensors, in particular to a preparation method of a zirconium carbide composite ceramic temperature sensor. Background technique [0002] At present, the temperature sensors that can be used to measure ultra-high temperatures mainly include infrared thermometers (non-contact temperature sensors) and tungsten-rhenium thermocouples (contact temperature sensors). The advantages of infrared thermometers are: 1. Non-contact measurement; 2. Wide measurement range, generally can measure minus tens of degrees to more than 3,000 degrees; 3. Fast temperature measurement. However, it is easily affected by the measured object (such as material type, surface roughness, physical and chemical structure and material thickness, etc.) and environmental factors (such as ambient temperature, dust, steam, etc.), resulting in large measurement errors. At present, the temperature-sensing elements that use conta...

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Problems solved by technology

However, it is easily affected by the measured object (such as material type, surface roughness, physical and chemical structure and material thickness, etc.) and environmental factors (such as ambient temperature, dust, steam, etc.), resulting in large measurement errors

At present, the temperature-sensing elements that use contact sensors to measure ultra-high temperatures are mainly tungsten-rhenium thermocouples, which can measure the highest temperature up to 2800°C, but when the temperature is higher than 2300°C, the data is scattered.

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