Al_2O_3-La_2O_3烧结助剂配比对SiC陶瓷结构与形貌的影响  

Effects of Al_2O_3-La_2O_3 Additives on the Surface Morphology of the Silicon Carbide Ceramic

作　　者：玛迪娜.马合木提 朱强[1] 张晓旭[1] 董肖[1] 鲁媛媛[1] 王玉玉[1] 薛明明[1,2] 

机构地区：[1]伊犁师范学院物理科学与技术学院新疆凝聚态相变与微结构实验室,新疆伊宁835000 [2]南京大学物理学院国家固体微结构重点实验室,江苏南京210093

出　　处：《伊犁师范学院学报（自然科学版）》2015年第4期33-35,共3页Journal of Yili Normal University：Natural Science Edition

基　　金：伊犁师范学院研究生科研创新项目(2015YSY032)

摘　　要：以Al_2O_3和La_2O_3作为烧结助剂,在1900℃下采用无压烧结技术制备了SiC陶瓷,用XRD、SEM方法对陶瓷样品的微观结构及表面形貌进行了检测分析.结果表明:烧结体中主晶相均为6H-Si C相,烧结助剂Al_2O_3与La_2O_3体积比为2∶8时所制备的陶瓷样品颗粒较为光滑,且孔隙相对较少.SiC ceramics were fabricated by the pressing and sintering technology at 1900 ℃ with Al2O3 and La2O3 as sintering additives. The phase composition and SiC ＋ （Al2O3＋La2O3） ceramics were analyzed by XRD and SEM. The thermal conductivity of SiC ceramics was also discussed. The results show that, the main crystal phase in the sintered body are 6H-SiC. Volume ratio of 2 ： 8 was prepared by SiC ceramic particles formed by Smooth, less porosity.

关 键 词：无压烧结 烧结助剂 表面形貌 

分 类 号：TQ174[化学工程—陶瓷工业]