99.99% al2o3 / aluminum oxide sinter tablet Our aluminium oxide has two categories: crystal, sinter. The product in this picture is sinter tablet. Applied in: ar coating; glasses coating; protective coating We follow critical manufacture standards, quality assurance, welcome your consultation! Specifications summary: Aluminium oxide(chemical formula: al2o3) 1.Crystal granule: 1-3mm; 3-5mm 2.Sinter tablet: 9*5mm 3.Color: colorless transparent; white 4.Purity: 99.99% 5.Package: 1kg/ bag 6.Storage: avoid exposure to sunlight & acid keep dry Aluminum oxide properties 1.Cas no.: 1344-28-1 2.Density(g/cm3): 3.6 3.Melting point(): 2020 4.Refractive index at 550nm: 1.54 5.Transparency range(m): 0.17~9 6.Evaporation source: b(w), e 7.Applications: ar coating; glasses coating; protective coating