铈在榍石固溶体中的固溶量

Solid-Soluted Content of Cerium in Solid Solution of Sphene

以CaCO3、SiO2、TiO2、Ce2C8O12·10H2O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)、背散射二次电子像(BSE)、能谱(EDS)等分析手段,研究铈在榍石固溶体中的固溶情况。研究结果表明,引入Al3+作为电价补偿时,Ce4+固溶在Ca1-xCexTi1-2xAl2xSiO5固溶体中,其最大固溶量为12.61%;不引入电价补偿时,Ce4+固溶在Ca1-2xCexTiSiO5固溶体中,其最大固溶量为10.98%;合成掺Ce榍石固溶体的较佳温度为1260℃。

The sphene solid solution was synthesized by solid-state method,with calcium carbonate,silica,titanium dioxide,cerium oxalate and alumina as raw materials.The solid-soluted content of cerium in sphene was researched by means of X-ray diffraction （XRD）,backscattering scanning electron microscopy（BSE）,energy dispersive spectroscopy（EDS）and so on.The influence of Al3＋ion introduction to sphene on the solid-soluted content of cerium in sphene solid solution was studied.The results indicate that when introducing Al 3＋to sphene as electrovalence compensation,Ce4＋ could be well solidified to Ca1-xCexTi1-2xAl2xSiO5,and the solid-soluted content is approximately 12.61%.With no electrovalence compensation,Ce4＋could be solidified to Ca1-2xCexTiSiO5, and the solid-soluted content is approximately 10.98%.The appropriate synthesis temperature of sphene solid solution is 1 260℃.