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制备了添加稀土金属氧化物的高钙镁钙材料试样,研究了添加稀土金属氧化物对MgO晶粒在不同温度下的生长速率的影响,计算得出合成高性能抗水化的高钙镁钙砂在不同合成温度下晶粒生长的活化能。结果表明:无添加剂时,QMgO为1104.02kJ/mol;添加质量分数为1%Y2O3时,QMgO为937.06kJ/mol;添加质量分数为2%Y2O3时,QMgO为922.70kJ/mol。当Y2O3加入量在1%时,氧化钇在1650℃下全部固溶到氧化钙晶格中,导致氧化钙晶格畸变,促进了高钙镁钙材料的烧结,提高了该材料的抗水化能力。这对降低高性能抗水化的高钙镁钙合成原料的能源消耗具有理论指导意义。
The samples with high calcium magnesium calcium added with rare earth metal oxide were prepared and the effects of adding rare earth metal oxides on the growth rate of MgO crystal grains at different temperatures were studied. Activation energy of grain growth of calcareous sand at different synthesis temperatures. The results showed that QMgO was 1104.02 kJ / mol with no additive and QMgO was 937.06 kJ / mol with 1% Y2O3 added. QMgO was 922.70 kJ / mol with 2% Y2O3 added. When Y2O3 is added in the amount of 1%, the yttrium oxide is completely dissolved into the crystal lattice of calcium oxide at 1650 ° C, resulting in crystal lattice distortion of calcium oxide, promoting the sintering of the high-calcium-magnesium-calcium material and improving the hydration resistance of the material ability. This is of theoretical significance for reducing the energy consumption of a high-performance hydration-resistant calcium magnesium calcium composite material.