水热法合成了系列缺陷化合物La2／3TiO3-λ（λ=0.000～0.046）粉末，利用XRD及TEM等技术对产物进行了表征；氧缺陷浓度增大，晶胞体积增大，在λ=0.020时，化合物由正交相转变为四方相；产物颗粒间聚集度较小，颗粒外形呈较规则六面体，平均直径0.1～0.3μm．
The series deficient compounds La2/3TiO3-λ(λ=0.000-0.046) powders were hydrothermallysynthesised from double hydrous oxides La2O3·3TiO2·nH2O, and characterized by XRD, TEMand other technologies. The cell volumes of the products would change to large with the increasingof deficient oxidation, and the crystal symmetry transforms from orthorhombic to tetragonal at λ=0.020. The payticle-sizes of these powders were about 0.1~0.3μm with a mode of particle-sizedistribution, and increased with the increasing of deficient oxidation.
参考文献
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