Sr在碱硬锰矿固溶体中的化学固溶量研究

以SrCO3、BaCOs、Al2O3和TiO2为原料，通过配方设计，采用高温固相反应，合成了单相固溶Sr的碱硬锰矿固溶体．借助于X射线衍射、扫描电子显微镜和电子探针波谱等分析手段，研究了配方设计、Sr在碱硬锰矿固溶体中的化学固溶量等问题．实验结果表明，采用高温固相反应工艺，容易合成掺Sr碱硬锰矿固溶体及单相掺Sr碱硬锰矿固溶体，但是Sr在碱硬锰矿固溶体中的最高化学固溶量与配方设计有关，当配方的化学式为SrxBa1Al2 2rTi6-24O16时，其最大化学固溶量为0．13mol，而当配方的化学式为Srx yBa1-yAl2 2xTi6-24O16时，其最大化学固溶量为0．22moLSr在碱硬锰矿固溶体中的最高固溶量还与合成方法有关，采用均相化学反应法合成的单相掺Sr碱硬锰矿固溶体中Sr的最高化学固溶量要高于固相反应法合成的固溶体中Sr的最高化学固溶量.

Chemical Solid-Soluted Content of Strontium in Solid Solution of Hollandite

Using SrCO_3,BaCO_3,Al_2O_3and TiO_2 as row materials,the single phase solid solution of hollan-dite of solid-soluted 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 solid-soluted strontium can be easily synthesized by high temperature solid phase reaction, but the maximum chemical solid-soluted content of strontium is related to the design of formulas. It is 0.13 mol for the formula of Sr_xBa_1Al_(2 2x)Ti_(6-2x)O_(16),and 0.22 mol for the formula of Sr_(x y)Ba_(1-y)Al_(2 2x)Ti_(6-2x)O_(16). The highest chemical solid-soluted amount of strontium in solid solution of hollandite is linked with synthesis method. The concentration of solid-soluted strontium in single phase solid solution of hollandite synthesized by homogeneous chemical reaction is higher than that by high temperature solid phase reaction. .