"With an unchangable heart, we can expect that a good beginning makes a wonderful ending."It has been 11 years since I devoted to fused silica business with purpose to be one of fused silica specialists.Fused silica is with many characters:1).high purity 99.9% silicon dioxide,low Iron,low Na2O,K2O.2).near zero thermal expansion3).high resistance to acid,thermal shock4).phase transformation with volumeFused silica are used in specialized fields,such as1).Refractory shapes,precast,castables,gunning mix.2).advanced thermal ceramic,3).investment casting,precsion casting.4).fusion bounded epoxy powder coating,5).Epoxy molding compound,6).quartz marble.Fused silica are usually be crused,milled,sieved into different size:0-1mm,1-3mm,3-5mm,-4+10mesh,-10+20mesh,-30+50mesh,-50/100,-120,-200,-325mesh,DIN70,DIN120.Chinese would like to call the coarse one fused silica sand and the fine one fused silica powder,while American name it fused silica grains and fused silica flour.Fused silica is different with fused quartz, which last one usually means the optic,tube etc.