榍石固溶体中钕的固溶量

Solid-Soluted Content of Neodymium in Solid Solution of Sphene

以CaCO3、H2SiO3、TiO2、Nd2O3和Al2O3为原料，通过高温固相反应合成榍石固溶体，借助X射线衍射（XRD）、扫描电子显微镜（SEM）、能谱仪（EDS）等分析手段，研究钕在榍石固溶体中的固溶情况。结果表明，引入Al^3＋作为电价补偿时，Nd件能较好地固溶在Ca1-y，NdyTi1-yAly，SiO5固溶体中，其固溶量为12．3％～13．56％；不引入电价补偿时，Nd较难在Ca缺位的Ca1-3／2，NdyTiSiO5固溶体中固溶，其固溶量约为3．5％；合成掺Nd榍石固溶体的较佳温度为1270℃。

The solid-state reaction synthesis of sphene were studied by using CaCO3, TiO2, H2 SiO3, Nd2O3 and Al2O3 as raw materials to prepare of sphene synroc, and by means of XRD, EDS and SEM analysis as well. The influence of Al^3＋ ion introduction to sphene on the immobilization quantity of neodymium in sphene synroc was studied. When Al^3＋ was introduced to sphene as compensation of electricity price, Nd^3＋ could be well solidified to Ca1-yNdyTi1-yAlySiO5. The immobilization quantity is in the range of 12.3%-13.56%. With no compensation of electricity price, Nd^3＋ would be more difficulty to be solidified to Ca1-3/zyNdyTiSiO5. The immobilization quantity is approximately 3.5 %. The appropriate synthesis temperature of sphene solid solution is 1 270 ℃.