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Electrical properties of neodymium doped CaB4Ti4O15 ceramics

机译：掺钕CaB4Ti4O15陶瓷的电性能

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摘要

Neodymium doped bismuth layer structure ferroelectrics (BLSFs) ceramics CaBi4-xNdxTi4O15 (x=0, 0.25, 0.50, 0.75) were prepared by solid-state reaction method. X-ray diffraction pattern showed that single phase was formed when x=0-0.75. The refined lattice parameters showed that a (b) axes decrease at x=0.25 and increase with more Nd3+ dopant. The effects of Nd3+ doping on the dielectric and ferroelectric properties of CaBi4Ti4O15 ceramics are studied. Nd3+ dopant decreased the Curie temperature linearly, and the dielectric loss, tan delta, as well. The remnant polarization of Nd3+ doped CaBi4Ti4O15 ceramics was increased by 80% at x = 0.25, while more Nd3+ dopant decreased the remnant polarization. CaBi3.75Nd0.25Ti4O15 ceramics had the largest piezoelectric constant d(33). The structure and properties of CaBi4-xNdxTi4O15 ceramics showed that Nd3+ may occupy different crystal locations when Nd3+ content x is less than 0.25 and more than 0.50. (C) 2005 Elsevier Ltd. All rights reserved.
机译：通过固相反应法制备了掺钕铋层结构铁电陶瓷（CaSF4-xNdxTi4O15（x = 0，0.25，0.50，0.75）。 X射线衍射图表明，当x = 0-0.75时形成单相。改进的晶格参数表明，（b）轴在x = 0.25处减小，并随着更多的Nd3 +掺杂而增加。研究了Nd3 +掺杂对CaBi4Ti4O15陶瓷介电和铁电性能的影响。 Nd3 +掺杂剂线性降低了居里温度，并且电介质损耗tanδ也降低了。 Nd3 +掺杂的CaBi4Ti4O15陶瓷的残余极化在x = 0.25时增加了80％，而更多的Nd3 +掺杂剂则降低了残余极化。 CaBi3.75Nd0.25Ti4O15陶瓷具有最大的压电常数d（33）。 CaBi4-xNdxTi4O15陶瓷的结构和性能表明，当Nd3 +含量x小于0.25且大于0.50时，Nd3 +可能占据不同的晶体位置。 （C）2005 Elsevier Ltd.保留所有权利。

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