1. Alumina Conical Crucible high temperature resistance,long-term use at 1600 ℃, short-term use at 1800 ℃. 2. Alumina Conical Crucible high thermal shock resistance. 3. Alumina Conical Crucible low thermal expansion coefficient. 4. Alumina Conical Crucible high chemical resistance to most acids and alkalis. 5. Alumina Conical Crucible high mechanical strength and excellent wear resistance.