1,Great compression strength. 2,Fine electrical property, 3,Corrosion resisting, ... of great compression strength,fine electrical property,corrosion resisting and antioxidation, etc. They are applied to vacuum device, instrument ceramics ... 1013Breakdown Strengthkv/mm2415152020The belowed is inspection equipments. Vacuum Device, Instrument Ceramics Use Aluminium Oxide High Vacuum Ceramic