Metastability in the MgAl2O4-Al2O3 System

作者：Wilkerson Kelley R^*; Smith Jeffrey D; Hemrick James G

来源：International Journal of Applied Ceramic Technology, 2014, 11(6): 1020-1024.

DOI：10.1111/ijac.12294

Aluminum oxide must take a spinel form (-Al2O3) at increased temperatures in order for extensive solid solution to form between MgAl2O4 and -Al2O3. The solvus line between MgAl2O4 and Al2O3 has been defined at 79.6 wt% Al2O3 at 1500 degrees C, 83.0 wt% Al2O3 at 1600 degrees C, and 86.5 wt% Al2O3 at 1700 degrees C. A metastable region has been defined at temperatures up to 1700 degrees C which could have significant implications for material processing and properties. Additionally, initial processing could have major implications on final chemistry.

• 出版日期2014-12