高火度酸化焔鉄赤釉の発色メカニズム(第2報) : 焼成過程の温度変化による発色と結晶化
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概要
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The purpose of the present experiments is to consider the relations between colour-change and crystalline phases of hard oxidizing fire iron red glaze by quenching temperature during firing. The colour of fired samples was analyzed by UV-vis spectrometer and compared with the values of L^*a^*b^*. The result of the experiments showed that the values of L^*a^*b^* had changed remarkably at 1050-950℃, without any observed radical change. Changes in crystalline phases with quenching temperature, whitlockite-type crystals already appeared with firing at 1050℃. Magnesioferrite crystal that was related to the red colour appeared at 950℃ upon cooling process and became more clear at 850℃. However, because fine red spots were observed on the surface of sample quenched at 1050℃, it could be considered that the main reaction influencing on coloration had occurred at 1050-950℃. Therefore it is desirable soaking or annealing at 1050-950℃ to obtain a prompt crystallization.
- 社団法人日本セラミックス協会の論文
- 2005-03-01