Study on the Striitiires, Electrical, Properities of the Multicrystal Multiphase Material Li 2 Mo 2-x W x O 6
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.ON THE STRIITIIRES, ELECTRICAL. MUITTICRYSTAI., MIILTIFIHASE MATERIAL Li 2Mo2_xW,) 6 STUDY
PROPF.RITIF.S OF
THE
CIII WANQIU SI{EN ZIIQI ZI{OU DEBAO Department of Material. Science. Wjhan Ulniversity of Technol.ogy, Wuhan, Huhei, P.R. China ABSTRACT. The mui. tiicrys•tal. mu.lttiphase cerami,•s material. Li2M '.WO,() with high conductivity is prepared. By XPD,.FDX graph.. IR and ESR spectra, it's determined that the samples are composed of two phasest Li21MO .,W.,0 4 anti MoO2 .The electrical properties are studied by AC admittance hridge and comptex impedance cpectroscopy. The ionic
conductivity increases and conducted activation energy decreases with the tungsten content increasing. The micro-structure model. anrd tihe ionic conducted mechan.i sm are given in this paper.
I NTRODI1),T I ON The discovery and application of fast
area
of
theory
on
ionic conductor make a new
condensed state physics. The fast ionic
conduictors have widel.y application on chemical engineering, electrochemistry. solid ion element and energy developmentt. The single crystal. is necessary for theoretical, research, hut applied research needs the mutticrystaL material.. The strncLures of li 0..)Mo6)1 7 and Nak.Mo 6O17 were measinred and electrical properities werecompared. [J,2] The conductivity of l,i2Wo 4 was measured, J•oo= 2. [•XI-7(J.cm)-,; E=-.94eV[3].The AC and DC condoictivity of Na2MoO 4-- ZnrMoO 4 were studied, the maxiaim conduc tivity anti minitinm electronic transport number apppeared in Na2 .2Zn0 .9(MoO 4)2 at 500"C, 6, 2.34X lO-3(.k~cm)-I, t. 1.08 X 10-. [4] The structure arid el.ectrochemical properities of LiMoO 2(0
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