Study on Isothermal Formation Dynamics of Calcium Barium Sulphoaluminate Mineral |
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Authors: | Yongbo Huang Shoude Wang Chenchen Gong Yanting Zhao Lingchao Lu |
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Affiliation: | 1. Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan, 250022, China
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Abstract: | The formation dynamics of calcium barium sulphoaluminate mineral with the composition of 2.75CaO·1.25BaO·3Al2O3·SO3 (C2.75B1.25A3 $\overline{\text{S}}$ S ¯ ) was studied. The results suggest that, under the preparative conditions, the formation of C2.75B1.25A3 $\overline{\text{S}}$ S ¯ mineral is controlled by a diffusion mechanism from 1,100 to 1,380 °C; and, the formation dynamics fits nicely with D 4 = 1 ? 2α/3 ? (1 ? α)2/3 = Kt. From 1,100 to 1,300 °C, the apparent activation energy is 227.45 kJ mol?1. From 1,300 to 1,380 °C, the apparent activation energy decreases to 175.94 kJ mol?1, making the formation of C2.75B1.25A3 $\overline{\text{S}}$ S ¯ mineral faster and easier. |
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