Oxide Ceramics｜99.8% Alumina Ceramic

The 99.8% alumina ceramic is made of white alumina powder with a purity of 99.8%. The powder is mixed with a small amount of oxides such as Fe2O3 and Na2O. After molding and sintering, it becomes a white solid insoluble in water, odorless and tasteless, high hardness, easy to absorb moisture but not deliquescence (burned does not absorb moisture). The density of 99.8% alumina ceramics is between 3.8-3.9g/cm3, its melting point is 2050℃, and its high temperature resistance is 1700℃. The compressive strength is 2550Mpa and the dielectric constant is 9.85. Compared with 95% ceramics, 99% ceramics and 99.5% ceramics, 99.8% alumina ceramics have stronger insulation performance and compressive strength. In terms of thermal conductivity, the thermal conductivity of 99.8% alumina ceramics is 34-39W/m.k, which is also stronger than other types of aluminum ceramics. It is a thermally conductive insulating material with excellent performance.

There are still few companies using 998 alumina ceramics in the market. Relatively speaking, it is suitable for some high-end industries, such as glass slides, hydrochloric acid laboratories, etc. In addition, its cost is higher than 95% ceramics and 99% ceramics.