复合氧化物Dy_(10)W_2O_(21)的热学性质研究  

Thermal Properties in Complex Oxide Dy_(10) W_2O_(21)

作　　者：祝振奇[1] 邢献然[1] 祁雪[1] 刘桂荣[1] 

机构地区：[1]北京科技大学理化系,北京100083

出　　处：《中国稀土学报》2002年第4期299-302,共4页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金 (2 99710 0 4;2 0 1710 0 6);教育部高校青年骨干教师资助计划项目资助

摘　　要：采用高温固相反应法合成了单相的稀土复合氧化物Dy1 0 W2 O2 1 。用热膨胀仪测定了其表观热膨胀系数。采用变温X射线衍射方法测定不同温度衍射谱 ,TREOR程序进行了指标化 ,确定为立方晶系 ,计算了单胞常数和本征热膨胀系数。用热分析仪测定了样品的DSC曲线 ,表明没有相变发生。Tungstate Dy 10 W 2O 21 was synthesized with solid state reaction method at high temperature. The phase structure was determined by X ray powder diffraction technique, and indexed in cubic system. The crystal structure was identified by high temperature X ray powder diffraction in the range of 25～1000 ℃, and the intrinsic thermal expansion coefficient was accurately calculated. Thermal expansion was also determined by a Netzsch dilatometery .DSC experiments present that the complex oxide is thermodynamically stable in the range of room temperature to 1000 ℃.

关 键 词：复合氧化物 Dy10W2O21 热学性质 稀土 晶格参数 热膨胀性 热膨胀系数 钨 镝 

分 类 号：O614.33[理学—无机化学] O642.3[理学—化学]