Question

What is the melting point of alumina and how is the melting point reduced?

Answer 1

• The melting point of pure alumina (Al₂O₃) is about 2050°C.
• To reduce this very high melting point, alumina is dissolved in molten cryolite (Na₃AlF₆), which lowers the melting point to about 900°C - 1000°C, making electrolysis feasible.