TY - JOUR
T1 - Alchemy in the Art of Traditional Japanese Ceramics
T2 - Microstructure and Formation Mechanism of Gold-Colored Bizen Stoneware
AU - Kusano, Yoshihiro
AU - Fukuhara, Minoru
AU - Fujino, Taichi
AU - Fujii, Tatsuo
AU - Takada, Jun
AU - Takano, Mikio
N1 - Funding Information:
The Bizen clay was provided by Sanrokugama in Bizen-shi, Okayama. This work was supported by a Kakenhi Grant-in-Aid (No. JP15K05656) from the Japan Society for the Promotion of Science (JSPS).
Publisher Copyright:
© Copyright 2018 American Chemical Society.
PY - 2018/7/5
Y1 - 2018/7/5
N2 - The microstructure and formation process of the golden color on traditional Japanese Bizen stoneware was investigated through model experiments. The current compositional and structural research of pottery fragments has revealed that the golden color comes from Fe oxide consisting of approximately 100 nm thick agglomerates of Al-substituted hematite (α-(Fe1-xAlx)2O3, x ≈ 0.05). The color is reproducible in the laboratory by sequential heat treatments of Bizen clay pellets under oxidizing and reducing atmospheres with an amount of potassium supplied as a melting point depressant. Lustrous colors such as silver and gold in Bizen stoneware have generally been attributed to the optical interference in superficial carbon films produced by burning wood fuel. Here, we show that the golden color is caused by the formation of Al-substituted hematite, not by the formation of carbon.
AB - The microstructure and formation process of the golden color on traditional Japanese Bizen stoneware was investigated through model experiments. The current compositional and structural research of pottery fragments has revealed that the golden color comes from Fe oxide consisting of approximately 100 nm thick agglomerates of Al-substituted hematite (α-(Fe1-xAlx)2O3, x ≈ 0.05). The color is reproducible in the laboratory by sequential heat treatments of Bizen clay pellets under oxidizing and reducing atmospheres with an amount of potassium supplied as a melting point depressant. Lustrous colors such as silver and gold in Bizen stoneware have generally been attributed to the optical interference in superficial carbon films produced by burning wood fuel. Here, we show that the golden color is caused by the formation of Al-substituted hematite, not by the formation of carbon.
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U2 - 10.1021/acs.cgd.8b00368
DO - 10.1021/acs.cgd.8b00368
M3 - Article
AN - SCOPUS:85048136171
SN - 1528-7483
VL - 18
SP - 4017
EP - 4021
JO - Crystal Growth and Design
JF - Crystal Growth and Design
IS - 7
ER -