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[1]黄保帅,刘云飞,吕忆农,等.Eu3+取代Bi1.5MgNb1.5O7陶瓷的结构与介电性能[J].南京工业大学学报(自然科学版),2013,35(04):12-16.[doi:10.3969/j.issn.1671-7627.2013.04.003]
 HUANG Baoshuai,LIU Yunfei,LÜ,et al.Structure and dielectric properties of Eu3+ substituted Bi1.5MgNb1.5O7 ceramics[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2013,35(04):12-16.[doi:10.3969/j.issn.1671-7627.2013.04.003]
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Eu3+取代Bi1.5MgNb1.5O7陶瓷的结构与介电性能()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
35
期数:
2013年04期
页码:
12-16
栏目:
出版日期:
2013-07-01

文章信息/Info

Title:
Structure and dielectric properties of Eu3+ substituted Bi1.5MgNb1.5O7 ceramics
文章编号:
1671-7627(2013)04-0012-05
作者:
黄保帅刘云飞吕忆农高虹
南京工业大学 材料科学与工程学院 材料化学工程国家重点实验室,江苏 南京 210009
Author(s):
HUANG BaoshuaiLIU YunfeiLÜ YinongGAO Hong
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering,Nanjing University of Technology,Nanjing 210009,China
关键词:
Bi1.5MgNb1.5O7 立方焦绿石 离子取代 介电性能
Keywords:
Bi1.5MgNb1.5O7 cubic pyrochlore ion substitution dielectric properties
分类号:
TM28
DOI:
10.3969/j.issn.1671-7627.2013.04.003
文献标志码:
A
摘要:
采用固相法制备Bi1.5-xEuxMgNb1.5O7 (x=0、0.1、0.2、0.3、0.4、0.5和0.6)陶瓷。采用X线衍射仪(XRD)、扫描电子显微镜(SEM)和阻抗分析仪分别对陶瓷的相结构、显微结构和介电性能进行表征。结果表明:当Eu3+取代量(x)较小(x≤0.5)时,所有组分的陶瓷样品均保持单一的焦绿石相; 当x=0.6时,样品出现少量的EuNbO4杂相。随着Eu3+取代量的增加,陶瓷的介电常数逐渐减小,介电损耗先减小后增大,温度系数显著增大。当x=0.5时,1 MHz下测得的介电常数为96,介电损耗为3.8×10-4,温度系数变成-12 ×10-6-1。因此,通过适当的Eu3+取代可以获得适用于Ⅰ类多层陶瓷电容器性能优异的介质材料。
Abstract:
The Bi1.5-xEuxMgNb1.5O7(x=0,0.1,0.2,0.3,0.4,0.5,0.6)ceramics were synthesized by conventional solid-state reaction method.The phase structure,the microstructure and the dielectric properties were investigated by X-ray diffraction(XRD),scanning electron microscope(SEM)and impedance analysis meter.The results showed that the Bi1.5-xEuxMgNb1.5O7 ceramics with single pyrochlore phase could be obtained with small amount of Eu3+ substitution(x≤0.5)while another phase EuNbO4 appeared for x=0.6.As Eu3+ content increased,the dielectric constant decreased gradually while the dielectric loss decreased at first,and then increased.Especially the temperature coefficient of dielectric constant was enhanced pronouncedly.The dielectric constant was 96,the dielectric loss was 3.8×10-4 and the temperature coefficient was -12×10-6-1 for x=0.5 at 1 MHz.Hence,dielectric materials with excellent properties,which were suitable for Class Ⅰ multilayer ceramic capacitors,could be achieved by proper Eu3+ substitution.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2012-09-26
基金项目:江苏高校优势学科建设工程(PAPD)
作者简介:黄保帅(1987—),男,江苏徐州人,硕士,主要研究方向为介质陶瓷; 吕忆农(联系人),教授,E-mail:yinonglu@njut.edu.cn..
更新日期/Last Update: 2013-07-07