Refractory material

Provided is a refractory material which is not impregnated with asphalt or the like and which has higher corrosion resistance and thermal shock resistance than an impregnated product such as asphalt or the like. Specifically, the refractory material of the present invention is characterized in that, in a refractory material not impregnated with tar or pitch, the apparent porosity of a refractory material sample after heat treatment in a non-oxidizing atmosphere at 1200 DEG C is 7% or less, and the apparent porosity of the refractory material sample after heat treatment in a non-oxidizing atmosphere at 1200 DEG C is 7% or less. The sum of the pore volumes of pores having a pore diameter of 1 [mu] m or less is 80% or more of the cumulative pore volume of the entire refractory material sample, and the air permeability is 50 * 10-17 m2 or less. 本发明提供一种耐火材料，不浸渍沥青等，且与沥青等浸渍处理物相比，耐腐蚀性及耐热冲击性更高。具体而言，本发明的耐火材料其特征在于，在未浸渍焦油或沥青的耐火材料中，作为在1200℃非氧化气氛中热处理后的耐火材料试样的物性值，表观气孔率为7％以下，细孔直径1μm以下的细孔气孔容积的合计为该耐火材料试样整体的累积细孔气孔容积的80％以上，透气率为5