HIGH TEMPERATURE-RESISTANT LIGHT-WEIGHT THERMAL-INSULATING MATERIAL HAVING DUEL POROUS STRUCTURE AND PREPARATION METHOD THEREFOR

摘要

A high temperature-resistant light-weight thermal-insulating material having a duel porous structure and a preparation method therefor. In said material, alumina, silica and aluminosilicate powder are used as raw materials, a molding auxiliary and a pore-forming agent are added, after stirring well and then extrusion molding, obtained by means of firing is a high temperature-resistant light-weight thermal-insulating material which has a dual porous structure of macroscopic through-holes and micro-pores, wherein a ratio of a total volume of the through-holes to a total volume of the micro-pores is 0.5-25: 1.