The Effect of Calcination Temperature of Natural Diatomite on Quality of Synthesized Silica

The effect of the calcination temperature of diatomite on the quality of synthesized amorphous microsilica was studied. It was found that the synthesis of silica from calcined diatomite, at a temperature of no higher than 500 oC for 2 hours or less, makes it possible to obtain amorphous silica of high purity, containing 99,63-99,30% SiO2 and minor impurities of iron oxide, aluminum oxide, etc.