Microstructure of Bi3-xNdxTiNbO9(0≤x≤0.75)Bismuth Layer-Structured Ceramics

摘要：

The microstructure of Bi3-xNdxTiNbO9(NBTN-x, x =0.00～ 0.75) ceramics were studied by X-ray diffraction and Ranan spectroscopy. Bi3TiNbO9 ceramics bear orthorhombic phase, while the sample with Nd3 + content of 0.75 was determined to be tetragonal phase by X-ray diffraction. Raman spectra revealed that Nd3+ substituted for the Bi3+ in A site rather than in the Bi2O22+ layer, unlike in the case of La3+ doping in Bi3TiNbO9. The tilt of the Ti/NbO6 octahedra decreased with increasing x. Based on the XRD data and Raman results, the overlap of the Raman modes 310 and 360 cm-1, which was ascribed to O-Ti-O bending, demonstrated that the crystal structure underwent the phase transition from orthorhombic to tetragonal when x =0.75.

关键词： Raman spectroscopy X-ray diffraction ferroparaelectric microstructure rare earths

作者: Qian Yafeng Wang Xiaojuan Zhu Jun Mao Xiangyu Chen Xiaobing

作者单位: College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China

会议类型: 国际会议

会议名称: 2006稀土玻璃陶瓷国际学术年会

会议地点: 海口

会议语种:英文

页码: 240-243

在线出版日期: 2006-11-13（万方平台首次上网日期，不代表论文的发表时间）