Microwave Sintering of Alumina Ceramics in a Single Mode Applicator,

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Abstract:

High purity submicron powders were sintered in a single mode cylindrical cavity applicator CMPR-250 operating at 2.45 GHz in the TMO12 mode. The alumina powders could be sintered from an initial green density of 60 to a final density close to theoretical. Rapid heating rates at very low power level were achieved. Uniform microstructure and relatively small grain size in the microwave sintered alumina were evident. The initial results of this study demonstrate the potential applicability of a single mode applicator for sintering alumina ceramics.

Author(s):
Patil, D. S. ; Mutsuddy, B. C.
Author Organization(s):
MICHIGAN TECHNOLOGICAL UNIV HOUGHTON
Supplementary Note:
This article is from 'Ceramic Transactions. Volume 21. Proceedings of the Symposium on Microwave Theory and Application in Materials Processing Annual Meeting of the American Ceramic Society (23rd) Held in Cincinnati, Ohio on April 29 - May 3, 1991,' AD-A253 631, p301-309.
Pagination:
0009

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*MICROWAVES, *SINTERING, *CERAMIC MATERIALS, APPLICATORS, CAVITIES, DENSITY, GRAIN SIZE, HEATING, LOW POWER, MICROSTRUCTURE, POWDERS, POWER LEVELS, PURITY, ALUMINUM OXIDES, ELECTRIC FIELDS, DIELECTRICS, SYMPOSIA
Field(s)/Group(s):
Ceramics, Refractories and Glass, Radiofrequency Wave Propagation
Keyword(s):
Component Reports, Radiation frequency, Permittivity
Report Date:
1992 Apr 27