Fused Silica Powder

We are offering fused silica sand is made of high purity crystal silica by electrically fusing (fusing temperature 1800-2000�) to amorphous silicon dioxide , then it was classed to different grades by manual and then specially engineered to sand form. Because fused silica has a very low thermal conductivity and excellent thermal shock resistance, it is used in lots of fields of investment casting, refractory