摘要
A systematic examination of LiTi2(PO4)3 and Li0.9Ti1.9Nb0.1(PO4)3 phosphates with Nasicon structure was carried out in order to investigate 鈥渙rder-disorder鈥?phase transitions. The structural features of aliovalent doped Li0.9Ti1.9Nb0.1(PO4)3 are considered in comparison with initial LiTi2(PO4)3. Explanations of the thermal behavior of samples are proposed based on NMR 7Li, 93Nb data, X-ray powder diffraction, DSC and impedance spectroscopy.