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 lting point(℃): 2020 4.refractive index at 550nm: 1.54 5.transparency range(μm): 0.17~9 6.evaporation source: B(W),E 7.applications: AR coating; Glasses coating; Protective coating