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 ℃.