| AgNW s/Yb0.3Co4Sb12纳米复合热电材料的制备及热电性能的研究 |
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| 引用本文： | 周振兴,陆晓芳,陈鹏,顾士甲,王连军.AgNW s/Yb0.3Co4Sb12纳米复合热电材料的制备及热电性能的研究[J].人工晶体学报,2017,46(10):1879-1884. |
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| 作者姓名： | 周振兴 陆晓芳 陈鹏 顾士甲 王连军 |
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| 作者单位： | 东华大学材料科学与工程学院,上海 201620;纤维材料改性国家重点实验室,上海201620 |
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| 基金项目： | 国家自然科学基金(51374078) |
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| 摘 要： | 采用多元醇法和熔融淬火高温退火法合成银纳米线(AgNWs)和填充方钴矿Yb0.3Co4Sb12材料,采用超声分散法并结合等离子体快速烧结技术(SPS)烧结成AgNWs/Yb0.3 Co4 Sb12纳米复合材料.通过XRD和扫描电镜分析材料的物相结构与微观形貌,测量计算了不同AgNWs复合含量样品的电导率、Seebeck系数、热导率、晶格热导率和ZT值.发现了复合AgNWs可以很大程度地提高方钴矿材料的电输运性能,但也使得其热导率不可避免地升高.最终AgNWs复合含量为0.5wt;的复合材料热电性能最佳,达到850 K时的1.02.
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| 关 键 词： | 热电材料 等离子体快速烧结技术 填充方钴矿 银纳米线 纳米复合材料 |
Preparation and Properties of AgNWs/Yb0.3 Co4Sb12 Thermoelectric Nanocomposite |
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| ZHOU Zhen-xing,LU Xiao-fang,CHEN Peng,GU Shi-jia,WANG Ling-jun.Preparation and Properties of AgNWs/Yb0.3 Co4Sb12 Thermoelectric Nanocomposite[J].Journal of Synthetic Crystals,2017,46(10):1879-1884. |
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| Authors: | ZHOU Zhen-xing LU Xiao-fang CHEN Peng GU Shi-jia WANG Ling-jun |
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| Abstract: | AgNWs and Yb filled skutterudites Yb 0.3 Co4 Sb12 were prepared by polyol reduction of silver nitrate and melting quenching annealing method .The nanocomposite AgNWs/Yb0.3 Co4 Sb12 were obtained by combining ultrasound technology and spark plasma sintering with different AgNWs weight ratio .The microstructure of the samples were studied by XRD and FE-SEM images confirmed that AgNWs were well dispersed in Yb0.3 Co4 Sb12 matrix.The thermoelectric properties of the samples with different AgNWs contents were investigated in detail .The results show that well-dispersed AgNWs in the bulk Yb 0.3 Co4 Sb12 can give rise to a much higher electrical conductivity and thermal conductivity without a noticeable decrease in Seebeck coefficient , which suggests the improvement of composites with AgNWs thermoelectrical was limited.The maximum ZT about 1.02 is observed with AgNWs contents of 0.5wt%. |
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| Keywords: | thermoelectric material SPS filled skutterudite AgNW nanocomposite |
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