Chapter 51. Potential Interlayer Materials for the Microwave Joining of Alumina
- John B. Wachtman Jr.
Published Online: 28 MAR 2008
Copyright © 1994 The American Ceramic Society
Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5
How to Cite
Cozzi, A. D., Clark, D. E., Porter, W. D. and Cavin, O. B. (1994) Potential Interlayer Materials for the Microwave Joining of Alumina, in Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314555.ch51
- Published Online: 28 MAR 2008
- Published Print: 1 JAN 1994
Print ISBN: 9780470375334
Online ISBN: 9780470314555
- potential interlayer materials;
- alumina monoliths;
- alumina sol-gel;
- differential scanning calorimetry;
- microwave absorber
Investigation of potential interlayer materials for the joining of alumina monoliths has been performed. Alumina sol-gel has been produced by a patented method using aluminum or chromium nitrate as the peptizing agent. Nickel oxide, iron (II,III) oxide or silicon carbide were added to all alumina sols.
The different compositions were heated using microwave energy at 2.45 GHz to evaluate each as a microwave absorber. Differential scanning calorimetry (DSC) was performed on the various compositions with x-ray diffraction analysis done on the resulting material.
All of the materials heated to some extent when exposed to microwaves. Two of the specimens, the peptized with chromium nitrate and those with iron oxide added, arced at high temperatures. The DSC provided information about the phase changes occurring within the alumina gel and between the gel and the added materials. The x-ray analysis of the powders retrieved from the DSC rendered the phases present after heating to 1400 °C.