Effect of TiO2 content on the burnability of clinker with high C3S were investigated by determination of free lime in final product, and the clinker phase formation, microstructural features of C3S and the solubility ...Effect of TiO2 content on the burnability of clinker with high C3S were investigated by determination of free lime in final product, and the clinker phase formation, microstructural features of C3S and the solubility of TiO2 in C3S were further studied by XRD, SEM/EDS analysis. TiO2 accelerates the combination of free lime in the samples, free lime content decreases obviously with TiO2 increasing up to 2% and almost remains above 2%. A new phase CaO·TiO2 was found when TiO2 was up to 3%, and samples with TiO2 displayed well-formed uniform size hexagonal C3S crystal. The limit of solubility of TiO2 in C3S at 1400 ℃ is about 1.7%.展开更多
基金Funded by China 973 Program of Fundamental Research of High Performance Cement's Preparation and Application (No.2009CB623102 and 2009CB623104)
文摘Effect of TiO2 content on the burnability of clinker with high C3S were investigated by determination of free lime in final product, and the clinker phase formation, microstructural features of C3S and the solubility of TiO2 in C3S were further studied by XRD, SEM/EDS analysis. TiO2 accelerates the combination of free lime in the samples, free lime content decreases obviously with TiO2 increasing up to 2% and almost remains above 2%. A new phase CaO·TiO2 was found when TiO2 was up to 3%, and samples with TiO2 displayed well-formed uniform size hexagonal C3S crystal. The limit of solubility of TiO2 in C3S at 1400 ℃ is about 1.7%.
基金the National Natural Science Foundation of China(21273171,21127004,21173168)Scientific Research Program Funded by Shaanxi Provincial Education Department,China(11JK0578,11JS110)~~
文摘利用精密绝热热量仪测定了配合化合物Zn(Met)_3(NO_3)_2·H_2O(s)(Met=L-α-蛋氨酸)在78-371 K温区的摩尔热容.通过热容曲线解析,得到了该配合物的起始脱水温度为T_D=325.10 K.将该温区的摩尔热容实验值用最小二乘法拟合得到了摩尔热容(C_p)对约化温度(T)的多项式方程,由此计算得到了配合物的舒平热容值和热力学函数值.基于设计的热化学循环,选择100 mL 2 mol·L^(-1)HCl溶液为量热溶剂,利用等温环境溶解-反应热量计,得到了298.15 K配合物的标准摩尔生成焓Δ_f H_m^0[Zn(Met)_3(NO_3)_2·H_2O,s]=-(1472.65±0.76)J·mol^(-1).