CaCO3掺杂下原位反应制备SiC/莫来石复相多孔陶瓷的性能研究  

Effect of CaCO_3 Addition on the Properties of in situ reaction prepared SiC/mullite Composite Porous Ceramics

作　　者：石雯怡 邓湘云[1,2] 李建保[1,3] 杨仪潇 张伟[1] 尹沛羊 

机构地区：[1]热带岛屿资源先进材料教育部重点实验室,海南大学,海口570228 [2]物理与电子信息学院,天津师范大学,天津300387 [3]清华大学材料科学与工程系,北京100084

出　　处：《中国陶瓷》2015年第11期20-26,共7页China Ceramics

基　　金：国家自然科学基金资助项目(50872093);国家863项目(2012AA03A610)

摘　　要：以Al2O3粉末、SiC粉末为主要原料通过原位反应烧结技术,添加CaCO3为烧结助剂制备了SiC/莫来石复相多孔陶瓷,研究了不同CaCO3添加量对于SiC/莫来石复相多孔陶瓷的相组成、显微结构、抗弯强度、气孔率的影响,结果表明:通过添加CaCO3这一碱土金属化合物,不仅能够增强SiC颗粒间的颈部连接,同时研究表明当CaCO3含量为4%时,在1400℃下保温3h制备的样品综合性能最佳,其孔隙率为35.3%,抗弯强度达到51.9MPa。SiC/mullite composite porous ceramics were fabricated through in situ reaction sintering process using Al2O3 and SiC powder sas raw materials, CaCO3 as sintering addtive. The effects of CaCO3 content on the phase composition, microstructure, flexural strength, open porosity of SiC/mullite composite porous ceramics were investigaed. The results show that the addition of CaCO3 can strengthen the neck connection of SiC particles. Meanwhile, by the addition of 4 wt% CaCO3, the sample sintered at 1400 ℃ for 3 h exhibits the most excellent properties of a high strength of 51.9 Mpa and an open porousity of 35.3%.

关 键 词：碳化硅 碳酸钙 复相多孔陶瓷 抗弯强度 气孔率 

分 类 号：TQ174.758.2[化学工程—陶瓷工业]