铈在榍石固溶体中的固溶量

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℃。

Solid-Soluted Content of Cerium in Solid Solution of Sphene

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 Al³⁺ to sphene as electrovalence compensation, Ce⁴⁺ could be well solidified to Ca_1－xCe_xTi_1－2xAl_2xSiO₅, and the solid soluted content is approximately 12.61%. With no electrovalence compensation, Ce⁴⁺ could be solidified to Ca_1－2xCe_xTiSiO₅, and the solid-soluted content is approximately 10.98%. The appropriate synthesis temperature of sphene solid solution is 1 260 ℃.