Dielectric relaxation and Maxwell-Wagner interface polarization in Nb2O5 doped 0.65BiFeO3–0.35BaTiO3 ceramics

电介质 介电谱 晶界 凝聚态物理 材料科学 电导率 居里温度 放松(心理学) 分析化学(期刊) 介电损耗 电阻率和电导率 兴奋剂 介电常数 耗散因子 核磁共振 化学 铁磁性 复合材料 微观结构 光电子学 物理化学 物理 社会心理学 量子力学 电化学 色谱法 电极 心理学
作者
Tong Wang,Jiacong Hu,Haibo Yang,Li Jin,Xiaoyong Wei,Chunchun Li,Fei Yan,Ying Lin
出处
期刊:Journal of Applied Physics [American Institute of Physics]
卷期号:121 (8) 被引量:185
标识
DOI:10.1063/1.4977107
摘要

Electrical characterizations of Nb2O5 doped 0.65BiFeO3–0.35BaTiO3 (0.65BF–0.35BT) ceramic were carried out over broad temperature and frequency ranges through dielectric spectroscopy, impedance spectroscopy, and ac conductivity measurements. The dielectric constant and loss tangent are drastically reduced with introducing Nb2O5 into the 0.65BF–0.35BT system. Two dielectric anomalies are detected in the temperature regions of 100 °C ≤ T ≤ 280 °C and 350 °C ≤ T ≤ 480 °C, and the Curie temperature (TC) was confirmed in higher temperature region. A dielectric relaxation with large dielectric constants was detected near the TC. This dielectric relaxation becomes even stronger with the gradual increase in the Nb2O5 content. Impedance spectroscopy results clearly show the contributions of grains and grain boundaries in the frequency range of 100 Hz ≤ f ≤ 1 MHz, and the relaxation processes for grains and grain boundaries are non-Debye-type. The grain boundaries are more resistive than that of the grains, revealing the inhomogeneity in samples. The experimental results are well fitted based on a Maxwell-Wagner (MW) interfacial polarization model below 100 kHz, and the MW interfacial polarization effect becomes more and more obvious with the increase in the Nb2O5 content. The increase in dielectric constant is possibly related to space charge polarization, which is caused by charges accumulated at the interface between the grain and grain boundaries. Frequency dependence of the ac conductivity confirms the MW interfacial polarization effect below 100 kHz.

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
CAOHOU应助q792309106采纳,获得10
刚刚
1秒前
1秒前
悦耳静枫发布了新的文献求助10
3秒前
烟花应助果粒多采纳,获得10
3秒前
潘善若发布了新的文献求助10
4秒前
廉凌波发布了新的文献求助10
4秒前
赘婿应助crazy采纳,获得10
4秒前
喻义梅关注了科研通微信公众号
5秒前
精明寻梅完成签到,获得积分10
5秒前
行远完成签到,获得积分10
6秒前
科目三应助感动黄豆采纳,获得10
7秒前
xueyu发布了新的文献求助10
7秒前
钱宇成完成签到,获得积分20
8秒前
修道院的豌豆完成签到,获得积分10
8秒前
廉凌波完成签到,获得积分10
9秒前
Rondab应助行远采纳,获得10
11秒前
11秒前
SYLH应助showmaker采纳,获得20
12秒前
12秒前
领导范儿应助FXQ123_范采纳,获得10
12秒前
Afaq完成签到,获得积分20
13秒前
油饼发布了新的文献求助30
15秒前
潘善若发布了新的文献求助10
15秒前
ganxinran发布了新的文献求助10
15秒前
17秒前
17秒前
19秒前
果粒多发布了新的文献求助10
22秒前
可爱的函函应助大刘采纳,获得10
23秒前
Rondab应助q792309106采纳,获得10
23秒前
23秒前
momo发布了新的文献求助10
24秒前
潘善若发布了新的文献求助10
25秒前
26秒前
斯文败类应助baronge采纳,获得10
27秒前
赘婿应助要减肥笑阳采纳,获得10
27秒前
27秒前
ganxinran完成签到,获得积分10
28秒前
xiaoyangchun完成签到,获得积分10
28秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989263
求助须知:如何正确求助?哪些是违规求助? 3531418
关于积分的说明 11253814
捐赠科研通 3270066
什么是DOI,文献DOI怎么找? 1804884
邀请新用户注册赠送积分活动 882084
科研通“疑难数据库(出版商)”最低求助积分说明 809136