THE METHOD FOR PREPARING THE NANO SILICA CRYSTALLINE POWDER USING THE FUMED SILICA

摘要

PURPOSE: To prepare nano silica crystalline powder by using fumed silica as nutrients and cristobalite or quartz powder as seed crystal at low temperature of 150 to 250 deg.C. CONSTITUTION: The method comprises a step of hydrothermal treatment of a mixture comprising a medicine for promoting nutrition, seed crystals, a mineralizing agent and water, wherein the medicine for promoting nutrition is fumed silica and the seed crystals are cristobalite or quartz crystalline powder.