摘要
以Li2 CO3,ZnO和NH4 H2 PO4 为原料 ,采用传统固相合成法和柠檬酸盐溶胶凝胶法制备了组成为Li1+2xZn1-xPO4 (x =0～ 0 .5 )的固体粉末和烧结体。对合成材料作了DTA ,TG ,XRD和SEM等分析 ,并用交流阻抗技术测定了样品的导电性。实验结果表明 ,与传统的固相合成方法相比 ,溶胶凝胶法可以使样品合成温度降低约 40 0℃ ,并且具有较高的导电率。
The samples of Li 1+2 x Zn 1- x PO 4( x =0～0.5) were prepared by citrate sol gel method and solid state reaction respectively. The results determined on the structure of synthetic samples show that there are several phases: α LiZnPO 4( x =0), Li 9Zn 6(PO 4) 7 ( x =0.14) and α Li 4Zn(PO 4) 2( x =0.5)in this system. The formation temperature of the samples prepared by citrate sol gel method is much lower than that of those prepared by solid state reaction. The ionic conductivity of the sinters was measured by ac impedance spectrum, in which α LiZnPO 4, Li 9Zn 6(PO 4) 7 do not show ionic conductivity at room temperature. However, the sample of α Li 4Zn(PO 4) 2 has a high Li cationic conductivity of 1.66×10 -6 ?S·cm -1 at 25?℃. [
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2001年第2期328-332,共5页
The Chinese Journal of Nonferrous Metals
