Microwave processing and properties of ceramics with different dielectric loss

Microwave sintering behaviors of three kinds of ceramics with different dielectric loss [Al 2O 3, Ce–Y–ZrO 2 and lead-based relaxor ferroelectrics (PMZNT)] in 2·45 GHz microwave furnace were described. Measurement of sample densities showed an enhancement of the sintering processing for all material...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 1999-01, Vol.19 (3), p.381-387
Main Authors: Xie, Zhipeng, Yang, Jinlong, Huang, Xiangdong, Huang, Yong
Format: Article
Language:English
Subjects:
Al 2O 3
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Electrotechnical and electronic ceramics
Exact sciences and technology
ferroelectric properties
microstructure – final
microwave processing
Technical ceramics
ZrO 2
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Summary:Microwave sintering behaviors of three kinds of ceramics with different dielectric loss [Al 2O 3, Ce–Y–ZrO 2 and lead-based relaxor ferroelectrics (PMZNT)] in 2·45 GHz microwave furnace were described. Measurement of sample densities showed an enhancement of the sintering processing for all materials studied. For PMZNT and Ce–Y–ZrO 2 with high dipolar loss or ionic conductive loss, the associated microstructure examined using scanning electron microscopy showed that microwave-sintered compacts produced much finer grain sizes at near theoretical density compared to conventional sintering. Resulting material properties, such as flexure strength and breakdown strength, were also increased due to developed microstructure in microwave processing. However, a comparable grain size and properties were observed for high pure Al 2O 3 with low dielectric loss in microwave and conventional methods. ©
ISSN:0955-2219
1873-619X
DOI:10.1016/S0955-2219(98)00203-9