Fused Silica Lump

We are offering fused silica lump.
Chem&size minerals fused silica is produced by melting high purity natural silica sand(quartz sand) at 2000℃ 12 hours. In the fusing process, the crystalline phase of silica sand transforms into amorphous phase. After cooling, fused silica ingot is made out with high purity amorphous silicon oxide. Fused silica ingot is separated into 5-10cm lumps grade a, grade b and grade c according to the black point size.
Because fused silica has a very low thermal conductivity and excellent thermal shock resistance, fused silica is widely used in lots of fields of investment casting,refractory,technical thermal ceramic,epoxy modling compound,fusion bounded epoxy powder coating.