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Effects of Preheating of Powder Before Spark Plasma Sintering of Transparent MgAl2O4 Spinel

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The effects of preheating of powder on microstructure and optical transmission for MgAl2O4 spinel ceramics fabricated by spark plasma-sintering processing are investigated. The preheating of powder in air enhances light transmission, whereas it has no remarkable effects on the microstructure. A decrease in light absorption was also observed for the spinel sintered after the preheating, and carbon contamination during sintering was not observed.

Document Type: Research Article


Affiliations: 1: National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan 2: Department of Materials Science and Engineering, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, South Korea

Publication date: 2010-08-01

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