超细碳酸钙热分解动力学研究  

Studies on thermal decomposition and kinetics of ultra-fine calcium carbonate

作　　者：蔡艳华[1] 彭汝芳[1] 马冬梅[1] 楚士晋[1] 左金 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010 [2]中国空气动力与研究发展中心高速所,四川绵阳622661

出　　处：《化工科技》2008年第2期7-9,共3页Science & Technology in Chemical Industry

基　　金：四川省科技厅重点攻关项目(2006Z02-025)

摘　　要：采用一种新型固相反应方法——超音速气流低热固相法成功制备了超细碳酸钙。应用XRD和SEM对其进行了表征和粒径分析,结果显示制备的碳酸钙颗粒平均尺寸为0.5μm。利用差热分析技术(DTA)测试了该方法制备的超细碳酸钙的热分解动力学参数,得到了碳酸钙的表观热分解活化能为79.1845 kJ/mol,指前因子A为9.181 2×104s-1。Ultra-fine calcium carbonate was prepared by a new method which is solid-state reaction at supersonic speed airflow. Its structure and size were characterized by XRD,DTA and SEM. The exper-imental results showed that the average size of the product particles was 0.5μm. The themal decompo-sition process of ultra-fine calcium carbonate was investigated with DTA technique,The apparent acti-vation energy Ea was 79.1845 kJ/mol and preexponential factor A was 9.1812×10^4S^-1.

关 键 词：超细碳酸钙 活化能 超音速气流 固相反应 

分 类 号：TQ127.1[化学工程—无机化工]