Heat dissipation ceramic for explosion-proof equipment

Abstract

The invention discloses heat dissipation ceramic for explosion-proof equipment. The heat dissipation ceramic is characterized by comprising the following components in parts by weight: 75-90 parts of 95 aluminum oxide, 1-3 parts of silicon dioxide, 0.5-1 part of kaolin, 2-5 parts of calcium carbonate, 1-2 parts of strontium carbonate, 3-5 parts of titanium dioxide and 0.1-0.5 part of yttrium oxide. By adopting the 95 aluminum oxide mixed ceramic, the heat dissipation ceramic is high in heat conductivity coefficient, good in insulating strength and resistant to high temperature.

Description

technical field [0001] The invention relates to the technical field of explosion-proof materials, in particular to a heat dissipation ceramic for explosion-proof equipment. Background technique [0002] With the rapid development of the automobile industry, while pursuing comfort and ease of handling, safety, energy saving and environmental protection are also being paid more and more attention. Many parts in automobiles need to be installed with explosion-proof fuses, especially in LED lamps, an insulating tube needs to be set outside these explosion-proof fuses. At present, these insulating bushings are usually made of ceramics using α-Al2O3 as the main crystal phase. [0003] The chemical bonds in α-Al2O3 ceramics are ionic bonds and covalent bonds. For ionic bonds, once the interatomic distance increases due to thermal expansion, the Coulomb force will be significantly reduced and the potential energy will be significantly increased. That is, only a little expansion wil...

AI Technical Summary

Problems solved by technology

[0004] At present, the ceramic tubes for α-Al2O3 explosion-proof fuses used by most automobile manufacturers have an expansion coefficient of about 6.7 to 8.0, poor heat insulation and toughness, and cannot meet the requirements of circuit environments with large operating currents.

When the fuse is blown, the instantaneous current is very large, especially when the fuse is blown due to the short circuit of the load. If the porcelain tube cannot be insulated or cracked when the fuse is blown, it will cause damage to the surrounding circuit or pollute the environment.