NASICON型正磷酸盐LiM2(PO4)3(M=Ti,Ge,Zr,Hf)是近来研究得比较深入的锂快离子导体.LiTi2(PO4)3难于烧结得到致密的LiT2(PO4)3陶瓷,且离子电导率很低,在298K时为8.260×10-8 S/cm,613K时为8.241×10-5 S/cm,而当以三价的Al3+离子经传统的固相烧结反应部分取代LiTi2(PO4)3中四价的Ti4+离子后,通过DSC、DTG、电化学阻抗与SEM测试表明,不仅能获得致密度高稳定的产物,而且烧结后得到的锂快离子导体Li3-x(Al1-xTix)2(PO4)3(X=1.0～0.55)体系在室温下的电导率有了巨大的提高.当X=0.85时,组分Li1.3Al0.3Ti1.7(PO4)3离子电导率最大,298K时为1.792×10-6S/cm和613K时为9.210×10-4S/cm.
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