Chapter 11. Chromium-Aluminum Hydroxide Synthesis and Sintering of the Solid Solution CrxAl2_xO3
- William J. Smothers
Published Online: 26 MAR 2008
Copyright © 1986 The American Ceramic Society, Inc.
Proceedings of the 13th Automotive Materials Conference: Ceramic Engineering and Science Proceedings, Volume 7, Issue 9/10
How to Cite
Raman, S. V., Doremus, R. H. and German, R. M. (2008) Chromium-Aluminum Hydroxide Synthesis and Sintering of the Solid Solution CrxAl2_xO3, in Proceedings of the 13th Automotive Materials Conference: Ceramic Engineering and Science Proceedings, Volume 7, Issue 9/10 (ed W. J. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470320358.ch11
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1986
Print ISBN: 9780470374689
Online ISBN: 9780470320358
- hydroxide synthesis;
- solid solution;
- gel precipitatfon
Chromium-ahtminum hydroxide powders were prepared by gel precipitation in ethanol. Shrinkage and densiflcation of the original hydroxide compacts are activated by escape of vapor phase, transformation in the order, hydroxide-amorphous oxide—alpha allotrope, and valency change of Or. Relative to the hydroxide green compact, the density increases four-fold to a value of 98% theoretical at 1600°C. Enhanced diffusivity of the solute phase at a high temperature, like 1700°C, causes pore-grain boundary breakaway and concomitant desintering with 15% reduction in density.