低热膨胀系数堇青石微晶玻璃的制备  

Preparation of Cordierite Glass-ceramics with Low Expansion Coefficient

作　　者：肖卓豪 董晓烽 罗民华 梁华银 罗文艳 于新楠 易维民 李秀英 XIAO Zhuohao;DONG Xiaofeng;LUO Minhua;LIANG Huaying;LUO Wenyan;YU Xinnan;YI Weimin;LI Xiuying(School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, China;Jiangxi Guanyi Abrasives Co., Ltd., Fengxin 330700, Jiangxi, China)

机构地区：[1]景德镇陶瓷大学材料科学与工程学院,江西景德镇333403 [2]江西冠亿研磨股份有限公司,江西奉新330700

出　　处：《陶瓷学报》2018年第2期239-243,共5页Journal of Ceramics

基　　金：国家自然科学基金(51762023;51362013);科技部国际合作项目(2015DF152960);江西省杰出青年人才计划(20171BCB23070);江西省科技厅项目(20142BAB206006;20171BBE50006);江西省普通本科高校中青年教师发展计划访问学者专项资金

摘　　要：采用传统熔体冷却法制备了Mg O-A1_2O_3-Si O_2玻璃,并通过热处理进一步获得了堇青石基微晶玻璃。探索了Zr O_2/Ti O_2复合成核剂及热处理制度对微晶玻璃析晶性能及热膨胀系数的影响规律。结果表明,Mg O-A1_2O_3-Si O_2体系有较强的表面析晶倾向,晶核剂的加入能降低析晶温度,同时有利于诱导样品发生均匀析晶,并能促进低温型堇青石相向膨胀系数更低的高温型堇青石相转变,有利于降低堇青石微晶玻璃材料的膨胀系数。在复合晶核剂作用下,当析晶温度为1050℃,保温时间为60 min时,可获得最低热膨胀系数为1.03×10^(-6)/℃的堇青石微晶玻璃材料。MgO-A12O3-SiO2 glass was prepared by conventional melt cooling method, and cordierite-based glass-ceramics were obtained by heat treatment. The infuence of ZrO2/TiO2 composite nucleating agent and heat treatment on crystallization behavior and thermal expansion coeffcient of glass-ceramics was explored. The results show that the MgO-A12O3-SiO2 system has a strong tendency to surface crystallization, and the addition of the nucleating agent can reduce the crystallization temperature, and it is beneficial to induce the homogeneous crystallization of the glass-ceramics and promote the phase transition of cordierite into indialite, which is benefcial to reduce the expansion coefficient of cordierite glass-ceramic material. With the complex crystal nucleus, the cordierite glass-ceramic material with the lowest thermal expansion coeffcient of 1.03×10^-6/℃ can be obtained when the crystallization temperature is 1050 ℃ and the holding time is 60 min.

关 键 词：堇青石 低膨胀系数 微晶玻璃 成核剂 

分 类 号：TQ174.75[化学工程—陶瓷工业]