Transparent Ceramics Windows is made by Spinel crystal which is fabricated by sintering and HIP in (hot isostatic pressure) techniques from high pure ultrafinespinel powder, is non-birefingence. It has excellent mechanical and thermal properties, high abrasion and erosion resistance as well. The spinel material is particularly useful in a widevariety of fields such as optical, electronic and structural applications.

Spinel crystal has high transmittance in the ultraviolet, visible and infrared wavelength regions as sapphire and quartz glass. Spinel is nearly as hard as sapphire, however it is much cheaper than sapphire. Now large size spinel is also a kind of good substitute material for quartz glass which has lower strength and thermal conductivity, and is easier to be corroded by acid and alkli.