| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat insulation material exhibiting a predetermined heat resistance property even at a high temperature, concretely at 1000°C.SOLUTION: In a heat insulation material, a pore volume with a pore diameter of 100 nm or less is 27 vol% or more, a heat transfer coefficient at 600°C is 0.1 W/mK or less, and a contraction coefficient after heating for three hours at 1000°C is 4% or less. The heat insulation material is obtained by calcining a row material of the heat insulation material containing an amorphous fireproof material of 30 mass% or more under a calcination condition in which the contraction coefficient after calcination is 7-40%. |
