... .Alumina Spray Prilling Powder 2.90%,92%,95%,97%,99% 3.Low sinteresting temperate 4.ISO,SGS 5.Professional manufacturer 1 ... scientific confecting, rubbing, pulping, spraying, drying. 2. reasonable particle size,3. moderate strength4.good fluidity5.low sintering temperature, easy demolding. IndicatorsUnitA90A92A95A97A99Al2O3 ...