铌酸钾钠(KNN)铁电陶瓷的织构的取向分布函数测定

实验三铌酸钾钠(KNN)铁电陶瓷的织构的取向分布函数测定1.实验目的：XRD衍射仪法测试铌酸钾钠(KNN)铁电陶瓷的织构的取向分布函数。2.实验方法：通过XRD测试铌酸钾钠(KNN)铁电陶瓷极化前和极化后衍射曲线对比，用公式利用00lhkl00lhkl00l00lhklIIW(0)W(0)W(0)IIRtttttR归一化，画图拟合的取向分布函数。3.数据处理：量得极化前和极化后的衍射曲线：001100101110111002200102201210112211202220It11300500015500550075056003350300024002400425041002000500IR90009500215008750750450076003500280028003900710032502400根据221212122222222222111222()//cos()//()//hhkkallchkalchkalc计算晶面夹角(hkl)100101110111002200102201210112211202220001001001001001001001001001001001001001cosφ00.688700.5576100.88490.429100.80220.3910.6890φ9046.479056.1109027.7664.599036.6666.9846.4790利用00lhkl00lhkl00l00lhklIIW(0)W(0)W(0)IIRtttttR归一化(hkl)1001011101110022001022012101122112022200.41890.57390.50030.7960.99060.35090.68230.68230.68230.86740.45970.48980.1658以φ为横坐标绘制00lWt分布曲线：按222W()1/(1)拟合，其空间分布表示为221W()[1(0.009)]四实验结论：铌酸钾钠(KNN)铁电陶瓷的织构的取向分布函数为：221W()[1(0.009)]由于手动量测误差较大，所以拟合出的分布函数较为粗糙。