Microstructure and formation conditions of the reddish hi-iro marking on traditional Japanese ceramics

• KUSANO Yoshihiro

  Department of Fine and Applied Arts, College of the Arts, Kurashiki University of Science and the Arts

• DANNO Teruaki

  Graduate School of Natural Science and Technology, Okayama University

• TOKUNAGA Keiko

  Department of Applied Chemistry, Faculty of Engineering, Okayama University

• KAMOCHI Nobuaki

  Saga Ceramics Research Laboratory

• HASHIMOTO Hideki

  Graduate School of Natural Science and Technology, Okayama University

• NAKANISHI Makoto

  Graduate School of Natural Science and Technology, Okayama University

• FUJII Tatsuo

  Graduate School of Natural Science and Technology, Okayama University

• FUKUHARA Minoru

  Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Okayama University of Science

• TAKADA Jun

  Graduate School of Natural Science and Technology, Okayama University

抄録

The microstructure and conditions for the formation of the reddish color referred to as hi-iro on Japanese ceramics were investigated through model experiments. The hi-iro marking was found to be formed by the reaction between clay and alkali ions supplied from the glaze. When a mixture of porcelain clay and 20 wt % KCl was heated in air at 1250°C and then cooled slowly to 800°C, hi-iro clearly appeared on the sample surface. In hi-iro, corundum [α-(Al,Fe)₂O₃], hematite (α-Fe₂O₃) and a liquid phase are formed. Upon heating until 1250°C, corundum is firstly precipitated as hexagonal plate-like crystals. During the cooling process, hematite precipitates on the edges of the corundum crystals to form specific composite particles. When rapidly cooled from 1250°C to room temperature, a brownish red color appeared on the sample surface, which was found to be caused by the formation of approximately 50 µm Al-substituted hematite (Fe_1.9Al_0.1O₃) particles. The relationship between the microstructure of the phases formed and the color is discussed.

収録刊行物

• Journal of the Ceramic Society of Japan

  Journal of the Ceramic Society of Japan 119 (1396), 942-946, 2011

  公益社団法人 日本セラミックス協会

キーワード

• Traditional ceramics
• Reddish color
• Microstructure
• Hematite
• Corundum
• <i>Hi-iro</i>

詳細情報

• CRID: 1390001205287747840
• NII論文ID: 130002067673
• DOI: 10.2109/jcersj2.119.942
• ISSN: 13486535
• ISSN: 18820743
• Web Site: http://www.jstage.jst.go.jp/article/jcersj2/119/1396/119_1396_942/_pdf
• 本文言語コード: en
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