Teng Yuancheng1,Zhou Shiguang2,Xiao Zhengxue2,Dong Faqin1,Wang Chengduan2
(1.Institute of Materials Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China;2.Institute of Environment Engineering,Southwest University of Science and Technology,Mianyang 621010,China)
Abstract£ºUsing SrCO3£¬BaCO3£¬Al2O3and TiO2as row materials,the single phase solid solution of hollan-dite of solidª²soluted strontium was synthesized by the designed formulas and high temperature solid phase reaction. The design of formulas and the chemical solid-soluted content of strontium in solid solution of hollandite were investigated by X-ray diffraction, scanning electron microscope and wave dispersion spectrum.The experimental results indicate that the solid solution or single phase solid solution of hollandite with solidª²soluted strontium can be easily synthesized by high temperature solid phase reaction, but the maximum chemical solidª²soluted content of strontium is related to the design of formulas. It is 0.13 mol for the formula of SrxBa1Al2+2xTi6-2xO16,and 0.22 mol for the formula of Srx+yBa1-yAl2+2xTi6-2xO16. The highest chemical solidª²soluted amount of strontium in solid solution of hollandite is linked with synthesis method. The concentration of solidª²soluted strontium in single phase solid solution of hollandite synthesized by homogeneous chemical reaction is higher than that by high temperature solid phase reaction.
Keywords:hollandite;disposal of radioactive waste;solid solution;solidª²soluted content;strontium