Accession Number : ADP007722
Title : An Analysis of the Individual Grain Structure of an Oxide Heated using Microwave Radiation and Heated Conventionally,
Corporate Author : TENNESSEE UNIV KNOXVILLE
Personal Author(s) : Meek, T. T. ; Zhang, X. ; Rader, M.
Report Date : 27 APR 1992
Pagination or Media Count : 13
Abstract : This work examines the structure of an oxide material heated conventionally and in a 2.45 GHz electromagnetic field. Also examined is the structure of the initial starting powder. Of particular interest is the surface structure and the interior bulk structure. TEM analysis indicates that the particle structure differs depending on the processing technique. Based on these findings, a preliminary heating model is introduced which is based on the presence of a liquid phase during sintering. The presence of this liquid phase may account for the apparent lower activation energy for sintering others have reported since their work presumes sintering is due to solid state processes.
Descriptors : *CERAMIC MATERIALS, *MICROWAVES, ACTIVATION ENERGY, ELECTROMAGNETIC FIELDS, ENERGY, HEATING, LIQUID PHASES, LIQUIDS, MATERIALS, MODELS, OXIDES, PARTICLES, POWDERS, PROCESSING, SINTERING, SOLIDS, STRUCTURES, SURFACES, GLASS, SYMPOSIA.
Subject Categories : Ceramics, Refractories and Glass
Radiofrequency Wave Propagation
Distribution Statement : APPROVED FOR PUBLIC RELEASE