High purity alumina products can withstand very high temperature under reducing, inert or high vacuum condition.They remain good chemical resistance under high temperature, and have excellent wear and abrasion resistance. Alimina products can withstand up to 1800 . Extreme high temperature stability under reducing, inert and high vacuum condition under high temperature up to 1800C. 1. Extreme wear and abrasion resistance. 2. Chemical corrosion resistance under high temperature. 3. High dielectric properties. 4. Gas tight for many applications to provide protective atmospheres or high vacuum at high temperature to eliminate contamination or impurity.