The effect of Nd substitution on the electrical properties of Bi3NbTiO9 Aurivillius phase ceramics
The effect of Nd substitution on the electrical properties of Bi3NbTiO9 Aurivillius phase ceramics
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DOI：
10.1063/1.3205006
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发表时间：
2009-08
影响因子：
3.2
通讯作者：
Hongtao Zhang;Haixue Yan;M. Reece
中科院分区：
文献类型：
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作者：
Hongtao Zhang;Haixue Yan;M. Reece
研究了Nd掺杂对Aurivillius相Bi 3 NbTiO 9基铁电陶瓷显微结构和电性能的影响。所有的Bi 3 − xNdxNbTiO 9（0≤x≤1）陶瓷都是铁电体。居里点TC随Nd掺杂量x的增加而降低。Bi 3 − xNdxNbTiO 9陶瓷在小x值（x≤0.6）时表现出尖锐的铁电-顺电相变，而在大x值（x≥0.8）时观察到弥散相变。A位的Nd取代使Bi_3NbTiO_9陶瓷的压电常数d_33和直流电阻率都有很大的提高。Nd掺杂抑制了氧空位的产生，从而改善了合金的性能。高d33值，高电阻率和高TC点（>700 °C）的组合表明，x≤0.6的Bi 3 − xNdxNbTiO 9陶瓷可能是高温压电应用的良好候选者。
The effect of Nd substitution on the microstructures and electrical properties of Aurivillius phase ferroelectric Bi3NbTiO9-based ceramics has been studied. All of the Bi3−xNdxNbTiO9 (0≤x≤1) ceramics are ferroelectrics. The Curie point TC decreased with increasing Nd doping content x. The Bi3−xNdxNbTiO9 ceramics exhibited a sharp ferroelectric-paraelectric phase transition at small x values (x≤0.6), whereas a diffuse phase transition was observed at higher x values (x≥0.8). Both the piezoelectric constant d33 and the dc electrical resistivity of Bi3NbTiO9 ceramics were greatly enhanced by Nd substitution on the A sites. The improved properties can be attributed to the fact that Nd substitution depressed the generation of oxygen vacancies. A combination of high d33 values, high resistivity, and high TC points (>700 °C) suggests that the Bi3−xNdxNbTiO9 ceramics with x≤0.6 could be good candidates for high-temperature piezoelectric applications.