Labwares are made by slip casting and pressure casting. Purity of sintered Alumina to be above 99.7%. Sintered Grain Size is between 2-4 microns. Sintered Density: above 3.9 gm/cc, above 98% TD (3.96gm/cc). Thermal Shock Behaviour: Temperature change rate should not exceed 150 °C/Hr. Maximum Temperature of use without load: 1750°C. Alumina High Form Crucible tested for Ultra High Vacuum Compatibility.