Black body and sample integrated heating apparatus and black body and sample integrated heating method for spectrum emissivity measurement

Abstract

The invention discloses a black body and sample integrated heating apparatus and a black body and sample integrated heating method for spectrum emissivity measurement. According to the present invention, a high-purity metal tungsten tube is adopted as a heating body and a corundum tube is adopted as a heat conductor and an insulator to transfer heat to a graphite tube wall and a graphite substrate so as to form a black body isothermal cavity; the graphite substrate adopted as the black body cavity bottom is the heat conductor during a sample heating process so as to heat a sample to the same temperature as the black body; the black body and sample integrated heating apparatus uses a set of a heating and temperature control unit to synchronously heat the black body and the sample so as to ensure the uniformity of the temperatures of the black body and the sample; and the apparatus has advantages of high measurement result accuracy, good repeatability, compact structure and low cost in the spectrum emissivity measurement system.

Description

technical field [0001] The invention especially relates to the structural improvement of the black body and the sample heating device in the material emissivity measurement system. Background technique [0002] Spectral emissivity is a dimensionless physical quantity that characterizes the thermal radiation ability of an object. It is numerically equal to the ratio of radiation energy between an object and a black body at the same temperature, and represents the dependence between the emissivity of a material and the wavelength of radiation. The emissivity measurement value indicates that the object The strength of the radiation ability in different spectral regions has important practical significance and good application prospects for promoting the development of radiation temperature measurement technology, improving the theoretical design level and actual preparation process of high-temperature radiation materials. [0003] Spectral emissivity measurement methods mainly ...

AI Technical Summary

Problems solved by technology

However, in the traditional energy method spectral emissivity measurement system, the heating and temperature control device of the material and the black body are independent of each other. The material heating device and the black body need two sets of heating components and temperature control devices with different structures, resulting in power consumption and The volume is very large, and it is difficult to ensure the consistency of the temperature of the material and the black body, which affects the accuracy and repeatability of the spectral emissivity measurement results

Images