fused silica powder for precision casting

Fused silica Introduction  Fused silica 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 granular and powder 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,ceramic,epoxy modling compound,fusion bounded epoxy. Fused Silica Properties     Investment Casting Grade 2.1 SiO2 >99.90% 2.2 Al2O3 <200ppm The finer the power,the higher the Al2O3,as powder is produced by ball mill with Alumina ball. 2.3 Fe2O3 <50ppm 2.4 TiO2 <20ppm 2.5 MgO <40ppm 2.6 CaO <40ppm 2.7 Alkalies Na2O+K2O <100ppm Fused Silica Application Refractory, ceramic, investment casting, foundry, epoxy molding compound, fusion bounding epoxy powder coating. Fused Silica Packaging & Shipping 1.Packing : 25kg/bag ,then 1000kg/bag . 20-25mt/1x20container .                 we can pack it according your need too. 2. Delivery : It is not dangerous goods , can be delivered just as ordinary goods . Company Introduction  Lianyungang changtong silica powder co.ltd established in 2009. We have been experience in producing and sales for almost 10 years .We are specializing in production of silica powder, silica sand, fused silica, cristobalite.We can accept you to customize the different specifications according to your own needs .    We have sold our products to America,Brazil ,India ,Dubai ,Thailand ,Turkey and so on. We appreciate the opportunity to meet your silica need.    Please kindly contact us right now if you're looking for a professional manufacture. fused silica FAQ 1. Q : Does your company offer free sample ? A : Yes ,we