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[1]龙春艳,何 曼,徐 军*.钇和钬掺杂对铋层状化合物的介电性的影响[J].武汉工程大学学报,2015,37(12):45-48.[doi:10. 3969/j. issn. 1674-2869. 2015. 12. 010]
 ,Effect of yttrium and holmium doping on dielectric properties of bismuth layer-structured compounds[J].Journal of Wuhan Institute of Technology,2015,37(12):45-48.[doi:10. 3969/j. issn. 1674-2869. 2015. 12. 010]
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钇和钬掺杂对铋层状化合物的介电性的影响(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
37
期数:
2015年12期
页码:
45-48
栏目:
材料科学与工程
出版日期:
2016-01-14

文章信息/Info

Title:
Effect of yttrium and holmium doping on dielectric properties of bismuth layer-structured compounds
文章编号:
1674-2869(2015)12-0045-04
作者:
龙春艳何 曼徐 军*
武汉工程大学材料科学与工程学院,湖北 武汉 430074
Author(s):
LONG Chun-yan HE Man XU Jun
School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430074, China
关键词:
铋层状化合物钇掺杂钬掺杂介电性能
Keywords:
bismuth-layered compound yttrium-doped holmium-doped dielectric properties
分类号:
TM 282
DOI:
10. 3969/j. issn. 1674-2869. 2015. 12. 010
文献标志码:
A
摘要:
为了研究和改善铋层状化合物的介电性能,利用常规固相反应法制备了稀土钇和钬掺杂的钡铋三钛二铌氧十二陶瓷,并研究了其介电性能随温度变化的规律. X射线衍射结果表明,钇和钬能部分替代钙钛矿层中的铋,形成纯相固溶体陶瓷.所有样品的介电温谱显示出典型的弥散型铁电相变,并且介电常数和居里温度均随稀土掺杂量的增加而降低.结果表明,钙钛矿层中A位和B位多元素的共同占位导致局部成分的不均匀,从而引起铁电相变的弥散.钇和钬部分替代钙钛矿层中的铋,抑制了与铋关联的结构变形,从而减少了铁电极化.
Abstract:
To study and improve the dielectric properties of bismuth layer-structured compounds, we prepared yttrium and holmium doped BaBi3Ti2NbO12 ceramics by conventional solid state reaction, and studied the dielectric properties in a wide temperature range. X-ray diffraction patterns showed that yttrium and holmium partially substitute bismuth in the perovskite layer of the crystal structure, forming pure phase solid solution. The temperature dependence of dielectric properties is typical of dispersive ferroelectric phase transition. The values of dielectric constant and Curie temperature decrease as the rare earth content increases. The results indicate that local composition inhomogeneity was induced by complex cationic occupation on both A and B sites in the perovskite layer, leading to dispersion of the ferroelectric phase transition. The partial substitution of bismuth with yttrium and holmium in the perovskite layer depresses the structure distortion correlated with Bismuth cations, resulting in the weakening of ferroelectric polarization.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2015-11-04基金项目:武汉工程大学大学生第六届研究生创新基金(CX2014067)作者简介:龙春艳(1990-),女,湖北荆州人,硕士研究生.研究方向:电子功能材料.* 通信联系人
更新日期/Last Update: 2016-01-20