钙钛矿对无水硫铝酸钙形成的影响  

Influence of Compound CaOTiO on Formation of Anhydrous Calcium Aluminosulphate

作　　者：张巨松[1] 隋智通[1] 回志峰[2] 安会勇[2] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004 [2]沈阳建筑大学材料学院,110168

出　　处：《东北大学学报（自然科学版）》2005年第3期278-281,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金重点资助项目(NO50234040).

摘　　要：通过化学分析、差热分析和XRD分析系统地研究了钙钛矿对无水硫铝酸钙形成的影响·研究结果表明:钙钛矿的存在对无水硫铝酸钙的原料二水石膏的二次脱水几乎没有影响,随着CT的掺量增加,碳酸钙分解反应的活化能逐步降低,有利于碳酸盐的分解,无水硫铝酸钙合成的开始温度有所降低,游离石膏量减少,f CaO的量逐渐减少,无水硫铝酸钙合成量增加,随着温度的升高,也有利于石膏的分解·By means of chemical analysis, thermogravimetry (DTA.TG) and XRD analysis, the influence of compound CaOTiO or CT on the formation of anhydrous calcium aluminosulphate (C_4A_3) was investigated systematically. The result showed that the compound CaOTiO has almost no effect on the secondary dehydration of dehydrate gypsum as one of the raw materials of C_4A_3. With the increasing dosage of CT, the activation energy in the decomposition reaction of calcium carbonate gradually lower in value to facilitate calcium carbonate decomposition. Furthermore, the initial synthesizing temperature of calciume drops with the amounts of free gypsum and f-CaO decreasing gradually and the synthesized amount of C_4A_3 increases. All these facilitate CT the gypsum decomposition with temperature rising.

关 键 词：钙钛矿 无水硫铝酸钙 活化能 化学分析 差热分析 XRD分析 

分 类 号：TQ172.726[化学工程—水泥工业]