Title

Metastability in the MgAl₂O₄-Al₂O₃ System

Abstract

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

Department(s)

Materials Science and Engineering

Keywords and Phrases

Ceramic materials; Marketing, Aluminum oxides; Increased temperature; Material processing; Metastabilities; Metastable region; MgAl, Aluminum

International Standard Serial Number (ISSN)

1546-542X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2014 The American Ceramic Society, All rights reserved.

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