| Sb对Li掺杂的KNN无铅压电陶瓷性质的影响 |
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| 引用本文： | 臧国忠,孙洪元,孙天华,王文文.Sb对Li掺杂的KNN无铅压电陶瓷性质的影响[J].聊城师院学报,2009(2):40-43. |
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| 作者姓名： | 臧国忠 孙洪元 孙天华 王文文 |
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| 作者单位： | 聊城大学材料科学与工程学院,山东聊城252059 |
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| 基金项目： | 基金项目：国家自然科学基金资助项目（50802038）;聊城大学大学生科技文化创新项目（SRT08011CL2） |
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| 摘 要： | 采用传统工艺制备了无铅压电陶瓷（Na0.5K0.45Li0.05）SbxNb1-xO3，研究了Sb掺杂对其压电、铁电、介电等性质的影响．实验结果表明，样品的居里点（Tc）、正交一四方相变温度（TT-O）均随Sb含量的增加而降低，掺杂7mol％Sb时，样品的居里点从454℃降至345℃，no从100℃降至室温以下．Sb5＋的引入限制了晶粒的生长，但提高了样品的致密度，从而提高了样品的压电、铁电性能．组分为（Na0.5K0.45Li0.05）Sb0.05Nb0.95O3的样品具有较为优异的性能：d33=241pC／N，Qm=50，kp=38．3％，d31=-83pC／N，g31=-0．08Vm／N，Pr=17μC／cm2，同时，该组分样品表现最“软”，具有相对最高的弹性柔顺常数SE11=14．2．
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| 关 键 词： | 无机非金属材料 无铅压电陶瓷 KNN 导纳圆图 居里温度 |
Effect of Sb on Properties of Li Modified KNN Lead-free Piezoceramics |
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| SUN Hong-yuan,ZANG Guo-zhong,SUN Tian-hua,WANG Wen-wen.Effect of Sb on Properties of Li Modified KNN Lead-free Piezoceramics[J].Journal of Liaocheng Teachers University(Natural Science Edition),2009(2):40-43. |
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| Authors: | SUN Hong-yuan ZANG Guo-zhong SUN Tian-hua WANG Wen-wen |
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| Institution: | (School of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, China) |
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| Abstract: | （Na0.5 K0.45 Li0.05） SbxNb1-xO3 ceramics were prepared by conventional oxide solid-solution technique and the effect of Sb on the piezoelectric, ferroelectric and dielectric properties were investigated. The results show that Both Curie temperature （To） and orthorhombic-tetragonal phase transition temperature （TT-o） decreased with increasing Sb content. For the composition with 7mol% Sb, TC and TT-o decreased from 454 oC and 100℃ to 345 oC and below room temperature,respectively. The addition of Sb inhibited the grain growth whereas,improved the ceramic density and piezoelectric, ferroelectric properties. The relative ＂soft＂ sample of （Na0. 5 K0. 45 Li0. 05 ） Sb0.05 Nb0.95O3 shows high performance of d33 =241 pC/N,Qm=50,kp =38.3% ,d31 =-83 pC/N,g31 =-0.08Vm/N,Pr=17μC/cm2 and SE11 =14.2. |
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| Keywords: | Inorganic non-metallicmaterials Lead-free piezoceramics KNN admittance circle diagram curie temperature |
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