99% Alumina Arc Ceramic Crucible - High Temperature Resistant Corundum Crucible for Scientific Research - 1 Piece(112mmx70mmx132mmx750ml)

<;0.07%, Hardness 86, Flexural Strength 350MPa.CONTROL HEATING/COOLING RATES - Excessive temperature change rates cause cracking! below 1200℃: 4℃/min, above 1200℃: 3℃/min, use power-controlled cooling, avoid rapid cooling by turning off power while hot, as initial furnace cooling is often too fast. (For larger products, use slower rates ≤2℃/min)FIRST USE - Place in a ~105℃ oven for 120 minutes, or follow the process recipe for an initial empty firing to remove moisture/impurities.AVOID DIRECT FLAME / LOCALIZED HEATING - Do not heat directly with gasoline torches, acetylene guns, alcohol lamps, or by with hot objects, uneven heating causes cracking.HIGH TEMPERATURE RESISTANCE - Alumina ceramics has good thermal stability, it can work in high temperature environment for a long time, alumina ceramic high temperature resistance can usually reach more than 1600 ° C, suitable for use in high temperature environment, such as electronic components, heating elements.SPECIFICATION - UOD × LOD × H × C = upper outer diameter × lower outer diameter × height × capacity,Aluminum Oxide ≥ 99%, Bulk Density ≥ 3.83 g/cm³, Apparent Porosity < 0.07%, Hardness 86, Flexural Strength 350MPa.

• : Made from 99% aluminum oxide, ensuring superior and performance in high-temperature applications.
• Exceptional Thermal Stability: Withstand temperatures over 1600°C, perfect for use in high-temperature environments such as electronic components and heating elements.
• Controlled Heating & Cooling: Follow recommended rates to prevent cracking—4°C/min below 1200°C and 3°C/min above for optimal results.
• Initial Firing Required: For best performance, preheat in a 105°C oven for 120 minutes to eliminate moisture and impurities.
• Avoid Direct Flame: devised to prevent cracking, do not expose to direct flames or localized heating; use controlled heating methods only.