Usually ceramic products are not transparent because of existence of tiny pores and trace impurities in the interior, which have refraction and reflection to light, so the light can not pass through. Transparent ceramic products have high purity, small porosity, high surface finish, very thin and uniform grain boundary structure, so the transparency and optical properties are excellent, while maintaining the structural ceramics of high strength, corrosion resistance, high temperature resistance, good electrical insulation, high thermal conductivity and good dielectric properties. In lighting, optical instrument lens, observation window, infrared detection window, protective fairing and other fields, transparent ceramic has more and more application, especially for high temperature, high pressure and corrosion environment.
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