Novel Routes to Microwave Processing of Ceramic Materials

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Willert-Porada, Monika:
Novel Routes to Microwave Processing of Ceramic Materials.
In: MRS Online Proceedings Library. Bd. 347 (1994) . - S. 31-43.
ISSN 1946-4274
DOI: https://doi.org/10.1557/PROC-347-31

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Abstract

Material parameters important for microwave processing are identified in case of powder synthesis from precursor compounds and in case of sintering Al2O3- as well as SiC-matrix ceramics. By varying the spatial distribution of the precursor in microwave transparent materials, different pyrolysis temperatures are obtained, which can be attributed to different heating rates due to selective microwave heating. The microwave sintering behavior of oxide ceramics is strongly influenced by the specific surface area of the powder and by aliovalent dopants. In contrast, for covalent ceramics, like SiC+TiC, no experimental evidence for similar effects was obtained.