| Na0.5Bi0.5TiO3-K0.5Bi0.5TiO3-BaMnO3无铅压电陶瓷的结构与电性能 |
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| 引用本文： | 江向平,古训玖,张凯韦,陈超,李小红,涂娜.Na0.5Bi0.5TiO3-K0.5Bi0.5TiO3-BaMnO3无铅压电陶瓷的结构与电性能[J].人工晶体学报,2012,41(4):916-921. |
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| 作者姓名： | 江向平 古训玖 张凯韦 陈超 李小红 涂娜 |
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| 作者单位： | 景德镇陶瓷学院材料科学与工程学院,江西省先进陶瓷材料重点实验室,景德镇333001 |
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| 基金项目： | 国家自然科学基金(50862005,51062005,91022027);江西省自然科学基金(2010GQW0037,2010GQW0038);江西省高等学校“先进陶瓷材料”科技创新团队;江西省主要学科学术和技术带头人培养对象计划项目(2010DD00800);江西省教育厅项目(GJJ10027,GJJ11196,GJJ11197,GJJ10226,GJJ11204);江西省研究生创新基金(YC10A119) |
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| 摘 要： | 采用固相法制备了(0.8 -x)Na0.5 Bi0.5TiO3 -0.2K0.5Bi0.5TiO3-xBaMnO3(简称NBT-KBT-BM)无铅压电陶瓷,研究了不同BM含量(x=0,0.25％,0.50％,0.75％,1.00％,1.25％,物质的量分数)样品的物相组成、显微结构及电性能.结果表明:所制备的NBT-KBT-BM陶瓷样品均为单一的钙钛矿结构.与纯NBT-KBT陶瓷相比,掺BM陶瓷的烧结温度降低,相对密度ρr得到提高.随x的增加,材料的压电常数d33、平面机电耦合系数kp与机械品质因子Qm先增大后减小,而介电损耗tanδ以及退极化温度Td一直降低.BM的掺入降低了材料的矫顽场Ec,提高了剩余极化强度Pr,从而增强了铁电性.当x=0.75％时,陶瓷获得最佳性能:d33=167 pC/N,kp=0.269,Qm=133,εr=774,tanδ=2.93％.
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| 关 键 词： | 无铅压电陶瓷 钛酸铋钠 压电性能 |
Structure and Electrical Properties of Na0.5Bi0.5TiO3-K0.5Bi0.5TiO3-BaMnO3 Lead-free Piezoelectric Ceramics |
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| JIANG Xiang-ping
,
GU Xun-jiu
,
ZHANG Kai-wei
,
CHEN Chao
,
LI Xiao-hong
,
TU Na.Structure and Electrical Properties of Na0.5Bi0.5TiO3-K0.5Bi0.5TiO3-BaMnO3 Lead-free Piezoelectric Ceramics[J].Journal of Synthetic Crystals,2012,41(4):916-921. |
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| Authors: | JIANG Xiang-ping GU Xun-jiu ZHANG Kai-wei CHEN Chao LI Xiao-hong TU Na |
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| Institution: | (College of Material Science and Engineering,Jiangxi Key Laboratory of Advanced Ceramic Materials,Jingdezhen 333001,China) |
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| Abstract: | Lead-free piezoelectric ceramics(0.8-x)Na0.5Bi0.5TiO3-0.2K0.5Bi0.5TiO3-xBaMnO3(abbreviated as NBT-KBT-BM) were prepared by the solid state reaction.The phase composition,microstructure and electrical properties for NBT-KBT-BM samples with different BM content(x=0,0.25%,0.50%,0.75%,1.00%,1.25% in mole) were investigated.It is found that all the samples exhibite a pure perovskite phase.Sintering temperature of NBT-KBT ceramics after doping BM decreases and relative density increases compared with pure NBT-KBT.The piezoelectric constant d33,electromechanical planar coupling factor kp and mechanical quality factor Qm increase first and then decrease,while dielectric constant tanδ and depolarization temperature Td decrease as the BM content increasing.BM doping could reduce the coercive field Ec and increase the strength of the remanent polarization Pr,thus improving the ferroelectric properties.This system ceramics with the best comprehensive properties could be obtained at x=0.75%: d33,Qm,kp,εr and tanδ is 167pC/N,0.269,133,774 and 2.93%,respectively. |
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| Keywords: | lead-free piezoelectric ceramics sodium-bismuth titanate piezoelectric properties |
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