添加MgCl2·6H2O对负膨胀材料Zr2（WO4）（PO4）2的影响  

Effects of MgCl2·6H2O on the negative expansion material Zr2（WO4）（PO4）2

作　　者：原晓艳[1] 李欢欢 乔祖强 李灏辉 王晋珍 邵回归 贾智 YUAN Xiao-yan;LI Huan-huan;QIAO Zu-qiang;LI Hao-hui;WANG Jin-zhen;SHAO Hui-gui;JIA Zhi(School of Materials Science and Engineering,Shaanxi University of Science&Technology,Xi′an 710021,China;China Building Materials Academy,Beijing 100024,China)

机构地区：[1]陕西科技大学材料科学与工程学院,陕西西安710021 [2]中国建筑材料科学研究总院有限公司,北京100024

出　　处：《陕西科技大学学报》2019年第6期115-118,共4页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(51502164);陕西省科技厅自然科学基金项目(2017JM5041);陕西科技大学博士科研启动基金项目(BJ16-05);陕西科技大学大学生创新创业训练计划项目(2018005)

摘　　要：以ZrO 2、WO 3和NH 3H 2PO 3为原料,MgCl 2·6H 2O作为添加剂,结合干法球磨和冷压成型技术,采用固相烧结法制备了负膨胀材料Zr 2(WO 4)(PO 4)2(ZWP).采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)对样品的物相和形貌进行了表征.结果表明:添加MgCl 2·6H 2O能够有效降低ZWP的烧成温度;当MgCl 2·6H 2O∶ZrO 2∶WO 3∶NH 3H 2PO 3摩尔比为0.2∶2∶1∶2时,在1050℃制备的ZWP的物相纯度高且晶粒尺寸均匀,在室温至600℃范围内,制备的ZWP线膨胀系数平均为-31×10^-7/℃.以其作为玻璃填料可以将低熔点封接玻璃的热膨胀系数从129.0×10^-7/℃降低到75.1×10^-7/℃,表现出了良好的负膨胀性能.In this study,combining the dry-grinding and pressing,Zr 2(WO 4)(PO 4)2(ZWP)was successfully prepared by solid-phase sintering process,using ZrO 2,WO 3 and NH 3H 2PO 3 as raw materials,and MgCl 2·6H 2O as an additive.The phase and morphology of the sample were characterized by X-ray diffractometer(XRD)and scanning electron microscopy(SEM).The results showed that the sintering temperature of ZWP could be effectively reduced by adding MgCl 2·6H 2O.When the molar ratio of MgCl 2·6H 2O∶ZrO 2∶WO 3∶NH 3H 2PO 3 is 0.2∶2∶1∶2,the uniform grain size ZWP with phase purity was obtained at 1050℃.In the range of room temperature to 600℃,the average linear expansion coefficient of ZWP was-31×10^-7/℃.The thermal expansion coefficient of the low melting point sealing glass can be reduced from 129.0×10^-7/℃to 75.1×10^-7/℃by using as-prepared ZWP as a filler,indicating as-prepared ZWP possessed a good negative expansion performance.

关 键 词：固相烧结 负膨胀特性 ZR 2(WO 4)(PO 4)2 

分 类 号：TB321[一般工业技术—材料科学与工程]