1.Calcined alumina powder 2.99.5%min 3.SGS,ISO certificate ... 5.Use:ceramic,electronic substrate,refractory etc fine calcined alumina powder 99% 1.Production process: Bayer process, high temperature ... without boron.2.This series of product is suitable for dry pressing, isostatic pressing, roll forming, tape casting etc. ... of various code is shown as belows: calcined alumina powder for dry pressing CIP