Solid state phase transformation of BaB2O4 during the isothermal annealing process |
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Authors: | H Kimura T Numazawa M Sato |
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Affiliation: | (1) National Research Institute for Metals, 1-2-1 Sengen, 305 Tsukuba, Ibaraki, Japan |
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Abstract: | Solid-state phase transformation of BaB2O4 during the isothermal annealing process for both to and to were investigated using a platinum crucible. For the -phase crystal at the -phase stable temperature (> 925 °C), the phase transforms to the phase perfectly below the melting temperature of 1100 °C. Meanwhile, for the -phase crystal at the -phase stable temperature (< 925 °C), the phase transforms to the phase perfectly above 800 °C. There is some difference in phase transformation behaviour between bulk-shape crystals and the powder, caused by thermal stress. |
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