Supported by the National Natural Science Foundation of China (Grant Nos. 50425415, 50372004);the National Basic Research Program of China ("973" Program) (Grant No. 2007CB613608)
Based on the thermodynamic study of β-SiAlON and one section of Si-Al-O-N phase diagram for Si/Al=9 at 1773 K, the pure β-SiAlON (Si6-ZAlZOZN8-Z) ceramics with different Z values (viz. 1.4, 1.8, 2.2, 2.6, 3.0) were ...