Evaluation of valencies and local coordination structures of Fe in Kasama celadon glazes

Hitoshi Ojima; Takeshi Matsukawa; Yuuji Sogabe; Hirokazu Yoshida; Osamu Fukuoka; Chie Tsukada; Toshiki Hirotomo; Nobuyuki Sugiyama; Tetsuo Honma; Toru Ishigaki

doi:10.2109/jcersj2.21162

Notes

Evaluation of valencies and local coordination structures of Fe in Kasama celadon glazes

Hitoshi Ojima, Takeshi Matsukawa, Yuuji Sogabe, Hirokazu Yoshida, Osamu Fukuoka, Chie Tsukada, Toshiki Hirotomo, Nobuyuki Sugiyama, Tetsuo Honma, Toru Ishigaki

Author information

Hitoshi Ojima
Kasama College of Ceramic Art, Industrial Technology Innovation Center of Ibaraki Prefecture
Takeshi Matsukawa
Frontier Research Center for Applied Atomic Sciences, Ibaraki University
Yuuji Sogabe
Kasama College of Ceramic Art, Industrial Technology Innovation Center of Ibaraki Prefecture
Hirokazu Yoshida
Kasama College of Ceramic Art, Industrial Technology Innovation Center of Ibaraki Prefecture
Osamu Fukuoka
Aichi Synchrotron Radiation Center, Aichi Science & Technology Foundation
Chie Tsukada
Aichi Synchrotron Radiation Center, Aichi Science & Technology Foundation
Toshiki Hirotomo
SPring-8 Service Co., Ltd.
Nobuyuki Sugiyama
Aichi Center for Industry and Science Technology
Tetsuo Honma
Japan Synchrotron Radiation Research Institute
Toru Ishigaki
Frontier Research Center for Applied Atomic Sciences, Ibaraki University

Keywords: Kasama ceramic art, Celadon glaze, X-ray absorption fine structure, Pre-edge X-ray absorption near edge structure spectrum, Coloration, Fe valency, Local coordination structure

JOURNAL FREE ACCESS

2022 Volume 130 Issue 3 Pages 290-293

DOI https://doi.org/10.2109/jcersj2.21162

Details

Abstract

To reveal the origin of coloration in Kasama celadon glazes, the valencies and local coordination structures of Fe in the celadon glaze specimens were evaluated by X-ray absorption fine structure measurements. Specimens were fabricated by a heating-cooling process [oxidation-oxidation (OFOF), reduction–oxidation (RFOF), or reduction-reduction (RFRF)], and exhibited two colors (yellow: OFOF specimens, light blue: RFOF and RFRF specimens). Pre-edge features of their X-ray absorption near edge structure spectra were measured to investigate the valency and local coordination structures of Fe in each specimen. The yellow and light-blue colors originated from FeO₄ tetrahedra with Fe in the +3 and +2 oxidation states, respectively.

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