| 備考 |
Composition: Magnesium silicate (Steatite ceramic) Firing Conditions Cone 14 approx. 1410°C. Properties: Cream-white. d^25=2.6. Tensile Strength 8500lbs./in.2 Impact Strength - Charpy 1.8 ft. lbs./in.2 Compressive Strength 76000 lbs./in.^2 Flexural Strength 20000 lbs./in.^2 Hardness 7 Mohs scale Thermal Expansion Linear coefficient of 20-100°C 6.9 x 10_6j 20-600°C 8.7 x 10-6 Thermal Conductivity 0.006 cal./cm.^2/sec./°C/cm. Softening Point 1450°C. Thermal Stability 1000°C. Thermal Shock Resistance: 20 or more cycles boiling to ice-water for rod 3/4 |