Thermodynamic study and syntheses of β-SiAlON ceramics

作     者：DONG PengLi WANG XiDong ZHANG Mei GUO Min LI WenChao 

作者机构：Department of Physical ChemistryUniversity of Science and Technology BeijingBeijing 100083China Chinese Society for MetalsBeijing 100711China College of EngineeringPeking UniversityBeijing 100871China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2009年第52卷第11期

页      面：3122-3127页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：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) 

主　　题：SiAlON thermodynamics synthesis oxynitride 

摘      要：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 synthesized at different temperatures using the pressure-less technique. The relationship of the experimental-saturated Z value (the maximum Z value at a constant temperature) with temperature was then discussed. The experimental results indicated that there is a good linear relationship between Z value and temperature, which is Z=_10.76+0.0071T (R=0.9985). The β-SiAlON stability regions at different temperatures were exhibited in a sketch phase diagram of Si3N4-SiO2-Al2O3-AlN system. In addi- tion, the relationship between experimental-saturated Z value and the lattice parameters was also characterized, and the linear regression results a=7.604+0.02872Z and c=2.908+0.02496Z were obtained, respectively.