欧美激情亚洲另类_大伊人青草狠狠久久_国产AV丝袜美腿丝袜_国产成人综综合视频_一级黄片无码观看_午夜福利av影院_日韓在線視頻不卡_国产A v不卡无码_亚洲无码一区二区三区在线观看_福利视频 中文字幕

High Whitness Quartz Powder 
       Quartz Powder is made by ball mills with our high purity  Quartz sand . This production is very pure and white , it has a very consistent particle size distribution , widely used for epoxy potting compound ,rubber , casting , paints and coats etc industries . 
       Chemical Compositions 
       SiO2 :99.2% Min to 99.8% Min, or as per customers' requirements 
       Fe2O3 :30ppm Max to 200ppm Max , or as per customers'requirements 
       Al2O3 :300ppm Max to 800ppm Max , or as per customers' requirements  
       Physical Properties 
       Appearance : White Powder 
       Specific Gravity :2.65 
       Hardness(Mohs):7 
       PH:5-8 
       Size Available 
       200mesh , 325mesh , 400mesh , 600mesh , 800mesh , 1250mesh or as per customers' requirements