... resulting in dyed yellow, orange, red, brown and other colors, hardness 7.8, specific gravity 4.6-4.71 ... : ISO9001,ISO14001Form: powder, particle,fluidized granulation Property1.Non-toxic, odourless2.Great thermostability3.Competitive price4.Serious Quality ... , high grade refractory, optical communication components,Oxygen sensors,solid Oxygen fuel cellSizePerformance index(wt%) Note: specific area, ...