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以碳酸锶(SrCO3)、碳酸钡(BaCO3)、氧化铝(Al2O3)和二氧化钛(TiO2)为原料,通过配方设计,用高温固相反应合成掺锶(Sr)碱硬锰矿固溶体。借助热重-差热分析、X射线衍射仪、扫描电镜和波谱分析仪等分析手段,研究了碱硬锰矿固溶体的合成温度、物相组成以及晶粒的化学计量。研究表明:合成单相碱硬锰矿固溶体和单相掺Sr碱硬锰矿固溶体的配方分别为Ba1+xAl2+2xTi6-2xO16,SrxBa1Al2+2xTi6-2xO16。单相掺Sr碱硬锰矿固溶体的最低合成温度为1250℃左右;最佳合成温度为1300℃。
The strontium (Sr) alkali hard manganese solid solution was synthesized by high temperature solid phase reaction with strontium carbonate (SrCO3), barium carbonate (BaCO3), aluminum oxide (Al2O3) and titanium dioxide as raw materials. The synthesis temperature, the phase composition and the stoichiometry of the crystal were studied by TG-DTA, X-ray diffraction, scanning electron microscopy and spectral analysis. The results show that the formula of the solid solution of single-phase alkali-alkali-manganese ore and single-phase mixed Sr-alkali-manganese ore are Ba1 + xAl2 + 2xTi6-2xO16, SrxBa1Al2 + 2xTi6-2xO16, respectively. The lowest synthesis temperature of single-phase Sr-doped alkali-manganese solid solution is about 1250 ℃. The optimum synthesis temperature is 1300 ℃.