SrWO_4多晶料的合成及其单晶的生长  

The polycrystalline material synthesis and growth of SrWO_4 crystal

作　　者：范建东[1] 张怀金[1] 王正平[1] 葛文伟[1] 王继扬[1] 

机构地区：[1]山东大学晶体材料国家重点实验室,山东济南250100

出　　处：《山东大学学报（理学版）》2005年第4期102-104,109,共4页Journal of Shandong University(Natural Science)

基　　金：国家自然科学基金资助项目(50590401E01)

摘　　要：用分析纯的SrCO3和WO3为原料通过高温固相反应合成生长SrWO4晶体的多晶料,采用提拉法使用沿a轴向的籽晶成功生长出22mm×40mm的无开裂、无色透明的SrWO4单晶.X射线粉末衍射实验表明所生长的SrWO4单晶属于四方晶系,空间群为I41a.通过浮力法测得其密度为6.439g·cm-3,用X射线荧光分析法测量了SrWO4单晶中W元素和Sr元素的有效分凝系数,其值接近于1.The polycrystalline material of SrWO4 was synthesized by means of a solid phase reaction of analytical purity SrCO3 and WO3 at high temperature. The transparent SrWO4 single crystal with dimension of Ф22 mm × 40 mm has been successfully grown along a-axis by Czochralski method. X-ray powder diffraction results show that the as-grown SrWO4 single crystal belongs to tetragonal system and I4 1/a space group. The measured density of SrWO4 is 6.439 g·cm^-3 by Buoyancy method. The effective segregation coefficients of W and Sr elements in SrWO4 single crystal are close to 1 by the X-ray fluorescence method.

关 键 词：SrWO4 固相反应 提拉法 X射线粉末衍射 有效分凝系数 

分 类 号：O782[理学—晶体学]