Preparation and properties of neodymium-modified bismuth titanate ceramics
Preparation and properties of neodymium-modified bismuth titanate ceramics
复制标题
DOI：
10.1016/j.jeurceramsoc.2007.10.010
复制
发表时间：
2008
影响因子：
5.7
通讯作者：
Y. Kan;Guo‐Jun Zhang;Pei-ling Wang;Yi-bing Cheng
中科院分区：
文献类型：
--
作者：
Y. Kan;Guo‐Jun Zhang;Pei-ling Wang;Yi-bing Cheng
采用水解法制备了Bi 4 − xNdxTi 3 O 12（x=0，0.2，0.5和0.75）的钕改性钛酸铋（BNT）粉体。研究了Nd对粉末特性、烧结、显微组织和性能的影响。结果表明，Ti-O伸缩振动在589 cm-1处的吸收峰向高波数移动，烧结和晶粒生长受到明显抑制。居里温度、介电损耗和居里峰强度随着Nd掺杂浓度的增加而逐渐降低，介电常数和损耗角正切对温度和频率的依赖性变小。同时，材料的偏振性能也得到了很大的改善。
Neodymium-modified bismuth titanate (BNT) powder with compositions of Bi4−xNdxTi3O12(x=0, 0.2, 0.5 and 0.75) were prepared through a hydrolysis method. The influence of Nd addition on the powder characteristics, sintering, microstructure and properties were investigated. It was found that the absorption band of Ti–O stretching vibration at 589cm−1was shifted to a higher wave number in the IR spectra, and the sintering as well as grain growth was significantly retarded. The Curie temperature, dielectric loss and Curie peak intensity were steadily decreased with an increase in Nd concentration, and the dielectric constant and loss tangent became much less dependent on temperature and frequency. At the same time, the polarization properties of the material were greatly improved.