Grain Growth in Millimeter Wave Sintered Alumina Ceramics

Seitaro Mitsudo; S. Inagaki; Inyoman Nyoman Sudiana; K. Kuwayama

doi:10.4028/www.scientific.net/AMR.789.279

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 789Grain Growth in Millimeter Wave Sintered Alumina...

Grain Growth in Millimeter Wave Sintered Alumina Ceramics

Abstract:

The millimeter wave (MMW) sintering of alumina ceramic had been performed. The results revealed that MMW sintered alumina has higher density than that of conventional method on all sintering temperature. However microstructure evaluation demonstrates that grain growth of MM wave annealed alumina is faster than in conventional annealing. It indicates that MM wave enhanced mass transport and solid state reaction rates during sintering. The empirical observations of microwave enhancements have been broadly known as microwave effect. Even though no satisfactory theory existed to explain the effect but the presence the electromagnetic waves (EMW) during microwave heating is clearly the key. In this paper, microwave effect on grain growth of alumina ceramic is presented. Some effective and unique characteristics of the EMW sintering were also discussed as well.

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Periodical:

Advanced Materials Research (Volume 789)

Pages:

279-282

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.789.279

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Online since:

September 2013

Authors:

Seitaro Mitsudo, S. Inagaki, Inyoman Nyoman Sudiana, K. Kuwayama

Keywords:

Alumina, Grain Distribution, Gyrotron, Microwave Effect, Millimeter-Wave Sintering

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