【摘要】 以Ｌｉ２ＣＯ３、ＭｎＣＯ３为原料，用柠檬酸盐溶胶凝胶法合成了Ｌｉ２ＭｎＯ３超微粉．对合成的材料进行了ＤＴＡ、ＴＧ、ＸＲＤ和ＴＥＭ等表征，并应用交流阻抗谱技术测定了样品的电导率．结果表明，６５０。Ｃ以上生成Ｌｉ２ＭｎＯ３纯相超微粉，粒径在５０nｍ以下．在１８～４００。Ｃ温度范围内，产物烧结体的离子导电率为１０－６～１０－３Ｓ·ｃｍ－１，其电导活化能为４４．８７ｋＪ·ｍｏｌ－１．更多还原

【Abstract】 Li₂MnO₃ ultrafine powders were synthesized by the citrate sol-gel method usingLi₂CO₃, MnCO₃ as raw materials. The powder samples were characterized by DTA , TG, XRDand TEM. Ionic conductivity of the sinter was determined by means of A-C impedance technique.The experiment results show that Li2MnO3 pure phase is formed at over 650’C. The diameterof the powder is below 50urn. The measured magnitudes of conductivities are in the range of10-6¹0-6s.cm-1, the value of activation energy is 44.87kJ’mol-1 from 18C to 400C.更多还原