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首页> 外文期刊>Journal of Advanced Ceramics >Effect of lanthanum, neodymium on piezoelectric, dielectric and ferroelectric properties of PZT
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Effect of lanthanum, neodymium on piezoelectric, dielectric and ferroelectric properties of PZT

机译：镧，钕对PZT压电，介电和铁电性能的影响

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摘要

The effect of La and Nd on piezoelectric, dielectric and ferroelectric properties of PZT (Pb(Zr_(0.53)Ti_(0.47))O3) was studied. The powders were prepared by "wet-chemical" route followed by calcination at 800 °C for 4 h. XRD analysis of the calcined powders confirms the tetragonal phase in the undoped PZT, which gradually decreases with the dopant concentration and the appearance of rhombohedral phase simultaneously. SEM study of sintered pellets reveals the decrease in grain size with the increase in dopant concentration beyond 0.02 mol Nd~(3+) and 0.03 mol La~(3+) respectively. The piezoelectric constant (d_(33)) and dielectric properties were maximum for 0.02 mol Nd~(3+) and 0.03 mol La~(3+) respectively. The remnant polarization of La~(3+)-doped sample was higher than Nd~(3+)-doped sample, and the sample with combined dopants shows intermediate remnant polarization (P_r). Based on the above study, it is concluded that La~(3+) is more effective than Nd~(3+), including in a mixture of La~(3+) and Nd~(3+) dopants.
机译：研究了La和Nd对PZT（Pb（Zr_（0.53）Ti_（0.47））O3的压电，介电和铁电性能的影响。通过“湿化学”路线，然后在800℃下煅烧4小时来制备粉末。煅烧粉末的XRD分析证实了未掺杂PZT中的四方相，随着掺杂浓度和菱形相的出现，四方相逐渐减小。烧结颗粒的SEM研究表明，随着掺杂剂浓度的增加，分别超过0.02 mol Nd〜（3+）和0.03 mol La〜（3+），晶粒尺寸减小。压电常数（d_（33））和介电性能分别为0.02 mol Nd〜（3+）和0.03 mol La〜（3+）。掺杂La〜（3+）的样品的剩余极化强度高于掺杂Nd〜（3+）的样品，并且混合了掺杂剂的样品显示出中等残留极化率（P_r）。根据以上研究，可以得出结论，La〜（3+）比Nd〜（3+）更有效，包括在La〜（3+）和Nd〜（3+）掺杂剂的混合物中。

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