... thermal conductivity, good thermal insulation performance. 1. Features1. Low bulk density, low thermal conductivity, good thermal insulation performance.2. Refractory category ... )36Refractoriness under load, 0.2MPa, Ta, ((°C)1450Porosity (%20-24Bulk density (g/cm³)2.30Cold crushing strength (MPa)45-55Thermal expansion ...