11-05/2021
High temperature resistance: Alumina ceramics can be used in the atmosphere up to 1650°C or 2900°F, and in the vacuum environment of 2000°C or 3600°F. At 1000 degrees Celsius, it maintains 50% of its tensile strength at room temperature. Although the strength of metals is weakened in high temperature environments, alumina ceramics retain their strength when they return to normal temperatures and remain unchanged. Alumina ceramics have high electrical resistivity and can reduce thermal shock, and increased purity will increase their electrical resistivity. Alumina ceramics become a perfect insulating material due to its dielectric level, etc., and current cannot pass through them.