Li_2MnO_3 Synthesis by Citrate Sol-Gel Method and Electric Property
SONG Xiu-Qin;MA Jian-Feng;CHEN Ru-Fen(Department of Chemistry, Hebei Normal University. Shijiazhuang 050016, China)
Li_2MnO_3 ultrafine powders were synthesized by the citrate sol-gel method usingLi_2CO_3, MnCO_3 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 of10-6~10-6s.cm-1, the value of activation energy is 44.87kJ'mol-1 from 18C to 400C.