用严格正规阴离子亚晶格代替Whiteway-Smith-Masson(WSM)模型中理想阴离子亚晶格的假定,推导了二元硅酸盐熔体的四参数分支链聚合模型。对于大多数熔渣,该模型中三个交换能参数W_(01),W_(12)和C(C=W_(02)-W_(01))可假定都等于零;于是简化得一参数模型,即WSM分支链聚合模型,对于CaO-SiO_2熔渣,上述三个交换能参数可假定为相等但不为零,于是得两参数模型,取交换能参数W_(12)/RT=-0.023,热力学平衡常数Ko~(11)~0=0.0044,所得两参数模型能较好地解释1600℃时0.412≤N_(SiO_2)≤0.450范围内CaO-SiO_2熔渣的活度数据。
The use of the s-regular anion sub-lattice assumption instead of the ideal anion sub-lattice one in the Whiteway, Smith and Masson (WSM) model leads to a four-parameter branched chain polymerization model for the binary silicate melts. For most slags investigated so far, three interchange energy parameters in the present model, W_(12), W_(o1) and C (C=W_(o2)-W_(o1)), could be assumed to be zero; then it becomes an one-parameter model, i.e. the WSM model. For the CaO-SiO_2 melts, the three above-mentioned parameters could be assumed to have the same value that does not equal zero. The new model is then converted into a twoparameter model. With the interchange energy parameter W_(12)/RT=-0.023 and the thermodynamical equilibrium constant K_(11)~0=0.0044 for the reaction SiO_4~(4-)+SiO_4~(4-)=Si_2O_7~(6-)+O~(2-) the new model is in better agreement with the experimental data on the activity in the CaO-SiO_2 melts at 1600℃ in the region of 0.412≤N_(SiO_2)≤0.450.
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