| 铜颗粒分散铌酸钾钠压电复合材料的制备与性能 |
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| 引用本文： | 赵高磊,张海龙,张波萍. 铜颗粒分散铌酸钾钠压电复合材料的制备与性能[J]. 吉林大学学报(工学版), 2011, 41(5): 1300-1304 |
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| 作者姓名： | 赵高磊 张海龙 张波萍 |
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| 作者单位： | 北京科技大学材料科学与工程学院,北京,100083 |
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| 基金项目： | “863”国家高技术研究发展计划项目(2006AA03Z436) |
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| 摘 要： | 在工业氮气(N2)气氛条件下制备了锂掺杂铌酸钾钠/铜(NKLN/Cu)压电复合材料,研究了铜含量对复合材料的相结构、密度、电学性能及力学性能的影响。结果表明:复合材料由NKLN陶瓷相和Cu金属颗粒两相组成,不同Cu含量复合材料的相对密度均达到95%以上。复合材料的介电常数随Cu含量的增加而急剧增加,压电常数和机电耦合系数随Cu含量的增加而减小,当Cu的体积分数达到20%时,NKLN/Cu复合材料的介电性能和压电性能均难以测量。NKLN/Cu复合材料的显微硬度随Cu含量的增加而降低,断裂韧性值随Cu含量的增加而升高,从铌酸钾钠陶瓷的1.01 MPa逐渐增至Cu的体积分数为40%时的2.81 MPa。
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| 关 键 词： | 材料合成与加工工艺 铌酸钾钠/铜 压电复合材料 电学性能 断裂韧性 |
Fabrication and properties of Cu-particle-dispersed potassium sodium niobate piezoelectric composites |
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| ZHAO Gao-lei,ZHANG Hai-long,ZHANG Bo-ping. Fabrication and properties of Cu-particle-dispersed potassium sodium niobate piezoelectric composites[J]. Journal of Jilin University:Eng and Technol Ed, 2011, 41(5): 1300-1304 |
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| Authors: | ZHAO Gao-lei ZHANG Hai-long ZHANG Bo-ping |
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| Affiliation: | ZHAO Gao-lei,ZHANG Hai-long,ZHANG Bo-ping(School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China) |
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| Abstract: | Lithium-modified potassium sodium niobate/copper(NKLN/Cu) piezoelectric composites were fabricated by protective sintering in a industrial nitrogen gas.The phase structure,density,electrical and mechanical properties were studied in relation to Cu content.The results show that the composites consists of only NKLN and Cu phases,the relative densities of the composites were all above 95 % theoretic densities.The relative dielectric constant r of the composites markedly increased with increasing Cu concentrati... |
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| Keywords: | materials synthesis and processing technology NKLN/Cu piezoelectric composites electrical properties fracture toughness |
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