Miniature black body radiation source and preparation method thereof

Abstract

The invention discloses a preparation method for a miniature black body radiation source, which comprises the steps of oxidizing a core rod in a drying box; coating the ceramic powder paste on the outer surface of the core rod after being cooled; drying the core rod in the shade and burnishing the core rod; sintering the dried core rod; folding a heating platinum wire from the middle thereof; knotting and twisting the heating platinum wire at the port end of the radiation chamber of the core rod into a double-strand helical shape and winding the wire onto the sintered and burnished core rod; coating the ceramic powder paste onto the surface of the winding core rod in four lines; wrapping a strip-shaped high-alumina fiber cloth onto the core rod into a cylinder shape and inserting the integral body thereof into the outer shell of the miniature black body radiation source connecting a lead-in conductor with the heating platinum wire; penetrating a k type thermocouple into the thermocouple hole of the core rod; and connecting the two ends of the heating platinum wire (5) of the miniature black body radiation source with a DC power supply through the lead-in conductor (6). The miniature black body radiation source molded by adopting the preparation method has the advantages of simple and convenient temperature control, high temperature control accuracy, high effective emissivity, small volume and mass and simple manufacture process.

Description

technical field

[0001] The invention belongs to the technical field of infrared radiation sources, and in particular relates to a molding method of a miniature black body radiation source. Mainly used for aerospace products, infrared simulation target source, laboratory test equipment, infrared search equipment test. Background technique

[0002] As a small infrared radiation source, the miniature blackbody radiation source has been widely used in simulation targets.

[0003] At present, the ultra-small blackbody radiation source commonly used in China has a cavity with a cylindrical and conical, conical and spherical structure. The structure is relatively complicated and difficult to process and shape. More materials with high emissivity, such as graphite, are used. For cavities that are not used at high temperatures, materials with high reflectivity can be selected as the cavity wall material, or the cavity can be processed into a special shape to reduce the dependence o...

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