Item Unit Target Specific gravity g/cm3 1.75?1.90 Coefficient of heat expansion (20-1000°C)10-6°C-1 2.5?5.0 Specific heat J/kgK 700?800 Heat conduction degree (20-100°C)W/mk 1.5?2.5 Heatshock-resisting oK Min300 The highest working temperature °C 1300 Apply to blow the hot function of the breeze in the electricity. Minimum order 5m3 Supply ability 2000m3