Li2O·Al2O3·SiO2复相陶瓷的研制  

Li_2O·A_l2O_3·SiO_2 Composite Ceramics

作　　者：马振强[1,2,3] 陈缔[1,2,3] 邓湘云[1,2,3,4] 李建保[1,2,3] 张海涛[1,2,3] 苏魁范[1,2,3] 

机构地区：[1]海南大学海南优势资源化工材料应用技术教育部重点实验室,海南海口570228 [2]海南大学硅锆钛资源综合开发与利用海南省重点实验室,海南海口570228 [3]海南大学材料与化工学院,海南海口570228 [4]天津师范大学物理与电子信息学院,天津300387

出　　处：《绝缘材料》2012年第2期19-22,共4页Insulating Materials

基　　金：国家自然科学基金(50872093);海南大学科研基金;海南大学“‘211’创新平台”

摘　　要：以石英砂、氧化铝为主要原料,聚乙烯醇(PVA)为粘结剂,掺杂Li2CO3制备了锂辉石陶瓷。通过TG-DSC、XRD、SEM研究了样品的烧结制度、物相组成和显微结构,并测定了样品的体积密度和力学性能。结果表明:Li2CO3含量为10%时,在1 150℃烧结温度下,锂辉石固溶体的晶相含量高,主晶相为Li2O.Al2O.34SiO2,体积密度为2.18 g/cm3,抗压强度为586 MPa,其结构均匀致密且力学性能最优。Using quartz sand and aluminum oxide as main raw material, polyvinyl alcohol （PVA） as bind- er, a spodumene ceramic doping with Li2CO3 was prepared. The sintering degree, thermal properties, composition and microstructure of the samples were investigated by TG-DSC, XRD and SEM. The bulk density and mechanical properties were tested. The results show that with a 10% content of Li2CO3 and a sintering temperature at 1150℃, the spodumene solid solution has a high crystal phase content, and the main phase is Li20-A1203.4SIO2, the bulk density is 2.18 g/cm3, and the compressive strength is 586 MPa. The structure of the samples is uniform and dense, and the mechanical property is excellent.

关 键 词：石英砂 Li2CO3掺杂 锂辉石陶瓷 微观结构 力学性能 

分 类 号：TM28[一般工业技术—材料科学与工程] TM201.4[电气工程—电工理论与新技术]