This product is white fine powder, narrow particle size distribution,18% firing shrinkage rate. The ... following is the detail of the products: product modelAl2O3Na2O3SiO2Fe2O3ignition losstrue densitygrain sizeapparent densityaverage particle ... .4±0.2average crystal size,18% shrinkage rate, often used as granulation powder of low temperature 99 ...