| Bi_（0.5）Na_（0.5）TiO_3-BaTiO_3-KNbO_3陶瓷的介电特性及相变行为研究 |
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| 引用本文： | 倪海民,罗来慧,诸跃进,张约品. Bi_（0.5）Na_（0.5）TiO_3-BaTiO_3-KNbO_3陶瓷的介电特性及相变行为研究[J]. 宁波大学学报(理工版), 2011, 24(3): 95-99 |
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| 作者姓名： | 倪海民 罗来慧 诸跃进 张约品 |
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| 作者单位： | 1. 宁波大学理学院,浙江宁波,315211
2. 宁波大学光电子功能材料研究所,浙江宁波,315211 |
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| 基金项目： | 浙江省科技厅科研项目(2008C21069) |
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| 摘 要： | 采用固相反应法制备了（1-x）Bi0.47Na0.47Ba0.06TiO3-xKNbO3（BNBT-xKN,x=0～0.08）陶瓷,借助铁电分析仪、阻抗分析仪、扫描电镜（SEM）等仪器研究了KNbO3（KN）引入后,对陶瓷的微观结构、相变行为和介电性的影响.BNBT-xKN的扫描电镜（SEM）图显示：适量的KN对BNBT陶瓷具有细化晶粒、增大致密度作用.介电温谱（30~500℃）显示BNBT、BNBT-0.01KN、BNBT-0.02KN陶瓷有3个介电异常峰,而BNBT-0.04KN和BNBT-0.08KN陶瓷中有2个介电异常峰,并对陶瓷中出现的介电异常进行了讨论.通过介电温谱数据拟合,讨论了BNBT-xKN陶瓷的介电弛豫特性,并解释了BNBT-xKN陶瓷退极化的原因以及出现双电滞回线的机理.
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| 关 键 词： | 铁电体 压电陶瓷 无铅 弛豫 弥散相变 |
Dielectric Behavior and Phase Transition of Bi_(0.5)Na_(0.5)TiO_3-BaTiO_3-KNbO_3 Lead-free Piezoelectric Ceramics |
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| NI Hai-min,LUO Lai-hui,ZHU Yue-jin,ZHANG Yue-pin. Dielectric Behavior and Phase Transition of Bi_(0.5)Na_(0.5)TiO_3-BaTiO_3-KNbO_3 Lead-free Piezoelectric Ceramics[J]. Journal of Ningbo University(Natural Science and Engineering Edition), 2011, 24(3): 95-99 |
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| Authors: | NI Hai-min LUO Lai-hui ZHU Yue-jin ZHANG Yue-pin |
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| Affiliation: | NI Hai-min 1,LUO Lai-hui 1*,ZHU Yue-jin 1,ZHANG Yue-pin 2 ( 1.Faculty of Science,Ningbo University,Ningbo 315211,China,2.Laboratory of Photo-Electronic Material,China ) |
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| Abstract: | Ceramics (1-x)Bi0.47Na0.47Ba 0.06TiO3-xKNbO3 (BNBT-xKN, x=0~0.08) are prepared through ordinary solid-state ceramic processing. The effects of KNbO 3 on the microstructure, dielectric properties and phase transition of BNBT-xKN are investigated using X-ray diffraction, scanning electron microscope (SEM), impedance analyzer and ferroelectric analyzer. The results show that KNbO 3 (KN) is diffused into the lattice of (1-x)Bi 0.47 Na 0.47 Ba 0.06 TiO 3 to form a solid solution with pure perovskite structure. T... |
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| Keywords: | ferroelectrics piezoelectric ceramics lead-free relaxor dispersion transition |
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