Na_（1－x）Zr（2－x）Nb_xP_3O_（12）系列化合物的水热晶化研究

HYDROTHERMAL CRYSTALLIZATION OF Na_(1-x)Zr_(2-x).Nb_xP_3O_(12) SERIES COMPOUNDS

采用水热晶化反应，制备出传统需要高温固相反应合成的掺杂ＮＡＳＩＣＯＮ化合物Ｎａ（１－ｘ）Ｚｒ（２－ｘ）ＮｂｘＰ３Ｏ１２（０＜ｘ＜１），并应用ＸＲＤ、ＩＲ方法对产物的晶体结构进行了研究，表明水热晶化产物是纯的物相并具有与ＮａＺｒ２Ｐ３Ｏ１２相同的结构．固体３１ＰＮＭＲ研究证实Ｎｂ（５＋）部分取代了Ｚｒ（４＋）所在位置，参与骨架的组成，并统计分布于结构中．水热晶化产物与固相反应产物具有相同的离子电导性能．

The doped NASICON compounds, Na(1-x)Zr(2-x)NbxP3O12(0<x<1 ), were prepared by using hydrothermal crystallizating process. These compounds were synthesized previously by the traditional solid-state reaction. The crystal structures of the hydrothermally crystalline products were indentified by means of XRD and IR spectroscopy. The results shown that the product is a single phase and its structures are similar to that of NaZr2P3O12. The studies of solid state 31P NMR proved that Nb(5+) .ions were partly substituted for Zr(4+) ions in the crystal structure and participated in the form of the framework and distributed randomly in the crystalline framework. The compounds have the same ionic conductivity properties as the products prepared by solid-state reaction.