钙长石晶体的形成机制研究  

Study on Formation Mechanism of Anorthite Crystal

作　　者：秦娟[1] 崔崇[1] 崔晓昱[1] 马海龙[2] 

机构地区：[1]南京理工大学材料科学与工程学院,南京210094 [2]宁夏大学民族预科教育学院,银川750021

出　　处：《人工晶体学报》2016年第5期1153-1157,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51578289;51468053);江苏省普通高校研究生科研创新计划项目(KYLX_0347)

摘　　要：以分析纯碳酸钙、氧化硅和氧化铝为原料,通过烧结法制备钙长石晶体,研究了煅烧温度和保温时间对钙长石晶相、微观形貌的影响。结果表明：硅灰石和钙铝黄长石是钙长石合成过程的中间产物,随着煅烧温度的升高试样内部形成大量液相,液相的形成及饱和析晶是钙长石形成的主要机制。板状钙长石晶体可以在1400℃的煅烧温度下保温一定的时间（2~8 h）获得,且保温时间越长,钙长石晶体的析出程度越大,晶粒尺寸也越大。Anorthite was prepared using calcium carbonate,silica and alumina as raw materials by sintering method.The influences of calcining temperature and holding time on the phase and morphology were analyzed.The results show that wollastonite and gehlenite generate as intermediates for anorthite.With the temperature increasing,liquid phase generates in the sample.The formation of liquid phase and cooling crystallization is the main mechanism of anorthite synthesis.Perfect anorthite crystals are presented as thick plate and they are obtained after calcined at 1400 ℃ for 2-8 h.With the holding time increasing,the crystallization of anorthite is more and the size of crystal is bigger.

关 键 词：钙长石 钙铝黄长石 煅烧温度 保温时间 

分 类 号：TB321[一般工业技术—材料科学与工程]