Primary particles of amorphous silica composite material, secondary particles of amorphous silica composite material, shaped bodies thereof and processes for their preparation

摘要

The invention provides: primary particles of amorphous silica composite material, characterized in that they are composed of numerous granular amorphous silica particles randomly attached to amorphous silica particles retaining the original configuration of calcium silicate crystals as starting crystals and having a crystalline appearance; secondary particles of amorphous silica composite material, characterized in that they are composed of said primary particles randomly three-dimensionally interlocked with one another; shaped bodies of amorphous silica composite material, characterized in that they are composed of either or both of said primary particles and said secondary particles randomly three-dimensionally interlocked with one another; and processes for preparing said primary particles, said secondary particles or said shaped bodies thereof.