Ca改性钛酸铅Pb_(1-x)Ca_xTiO_3纳米晶的拉曼光谱研究  

FT Raman Spectroscopic Study on Pb 1-x Ca xTiO 3 Nanocrystals

作　　者：强亮生[1,2,3] 丁志立 王旭[1,2,3] 傅宏刚[1,2,3] 于海涛 张新 赵冰[1,2,3] 徐蔚青 

机构地区：[1]哈尔滨工业大学应用化学系 [2]吉林大学超分子结构与谱学开放实验室 [3]黑龙江大学化学化工学院

出　　处：《光散射学报》1999年第2期118-122,共5页The Journal of Light Scattering

基　　金：黑龙江省自然科学基金;黑龙江大学杰出青年科学基金

摘　　要：本文在２８８Ｋ和３７８Ｋ温度下测定了不同Ｃａ含量Ｐｂ１－ｘＣａｘＴｉＯ３（ＰＴＣ）纳米晶的拉曼光谱。同时在室温条件下测定了不同晶粒尺寸Ｐｂ０．８５Ｃａ０．１５ＴｉＯ３的拉曼光谱。讨论了Ｃａ掺入量、温度、晶粒尺寸等因素对声子频率的影响。声子频率的变化情况表明，对于ｘ≥０．２的ＰＴＣ纳米晶，与相同Ｃａ含量的陶瓷相比，存在着晶格膨胀的倾向。FT Raman Spectra of Pb 1-x Ca xTiO 3 nanocrystals with different lanthanum amount were measured at 288K and 378K. Several nanocrystals of different grain size of Pb 0.85 Ca 0.15 TiO 3 were also prepared at 288K. The effect of the amount of lanthanum, grain size and temperature on phonon frequency were discussed indetail. Furthermore, based on comparison of the frequency of PTC nanocrystal with x≥0.2, and that of ceramic with the same amount of calcium, we can conclude that lattice expansion is present in PTC nanocrystals.

关 键 词：钛酸铅 纳米晶 傅立叶变换 拉曼散射 声子 

分 类 号：O734.1[理学—晶体学] O614.433