Figure 15

Gibbs free energy of formation of AlB₂, B₂O₃ and Al₂O₃ with temperature range. The point positioned at the end of B₂O₃ line indicates melting temperature of B₂O₃ (723 K), and the triangle positioned at the end of AlB₂ line indicates decomposition temperature (~1193 K)⁶⁴.