... Ceramic Powders Al2O3 - 90, 95, 99, 997 Package: Pack with fiber box with polyethylene film, net weight: 40kgs/carton. Precision Alumina Ceramic ... Applications Ceralumi-997: Electrochip, structure ceramic, electronic ceramic,bioceramic. Ceralumi-99: Structure ceramic, friction disk,vacuum tube,electrochip ... disk,vacuum tube. Ceralumi-90: Structure ceramic,sealing ring,friction disk,vacuum tube. Storage ...