固相法合成钙长石粉体及其在透明釉中的应用研究  

Synthesis of Anorthite Powder by Solid-state Method and its Application in Transparent Glaze

作　　者：王少华 王子晗 李小女 陈韦嘉 黄霞 WANG Shao-hua;WANG Zi-han;LI Xiao-nv;CHEN Wei-jia;HUANG Xia(School of Materials Science and Engineering,Jingdezhen Ceramic University,Jingdezhen,333403,China)

机构地区：[1]景德镇陶瓷大学材料科学与工程学院,景德镇333403

出　　处：《中国陶瓷》2024年第5期66-72,共7页China Ceramics

基　　金：国家自然科学基金(52102023);江西省自然科学基金(20202BABL214008);江西省教育厅项目(GJJ2201005);景德镇市科技计划项目(20224GY008-12)。

摘　　要：以石英、碳酸钙、氧化铝为原料,采用固相法制备了钙长石粉体,借助XRD、SEM、DSC-TG和力学性能等检测手段研究了化学组成、煅烧温度、保温时间及球磨时间对钙长石合成的影响,探究了钙长石的析晶机理及其在透明釉中应用。结果表明:在钙长石的化学组成附近适当增加CaO的量有利于合成单一的钙长石晶相,但过量的CaO则导致析出钙铝黄长石杂质相。适当提高煅烧温度、延长保温时间或减小颗粒粒径均有利于钙长石析晶。析晶机理研究表明钙长石的析晶是由钙铝黄长石、铝酸钙等中间相转化而来,开始温度在1230℃附近,至1300℃时完全转化。钙长石加入透明釉中会降低釉面的透光度和光泽度,但会提高釉面硬度,钙长石的加入量为3%~15%(wt)时效果最佳,能获得高硬度的透明微晶釉。The anorthite powder was prepared by the solid-state method using quartz,calcium carbonate and alumina as raw materials.The effect of chemical composition,calcination temperature,holding time and ball milling on anorthite formation was investigated,along with its crystallization mechanism and application in transparent glaze,employing XRD,SEM,DSC-TG,and mechanical property analyses.The results show that an appropriate increase in CaO content favors the formation of pure anorthite crystals,but excessive CaO leads to the precipitation of gehlenite impurities.Elevating the calcination temperature,prolonging the holding time,or reducing the particle size are all conducive to anorthite synthesis.Crystallization mechanism analysis indicates that the anorthite crystallization is transformed from mesophases such as gehlenite or calcium aluminate,with a starting temperature around 1230℃and a complete transformation at 1300℃.Adding anorthite to a transparent glaze decreases its transmittance and gloss but enhances surface hardness.The optimal transparent glass-ceramic glaze is obtained with 3%~15%(wt)anorthite addition.

关 键 词：钙长石 固相法 析晶机理 透明釉 

分 类 号：TQ174.43[化学工程—陶瓷工业]