| La_xSr_(1-x)TiO_3氧化物热电材料的制备与电传输性能 |
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| 引用本文： | 尚鹏鹏,张波萍,李敬锋,赵立东,刘玮书,马宁.La_xSr_(1-x)TiO_3氧化物热电材料的制备与电传输性能[J].稀有金属材料与工程,2009,38(Z2). |
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| 作者姓名： | 尚鹏鹏 张波萍 李敬锋 赵立东 刘玮书 马宁 |
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| 作者单位： | 1. 北京科技大学,北京,100083
2. 清华大学,新型陶瓷与精细工艺国家实验室,北京,100084 |
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| 基金项目： | 国家重点基础研究发展计划("973")项目资助 |
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| 摘 要： | 利用溶胶凝胶(sol-gel)法和放电等离子烧结(SPS)制备了单相的钙钛矿结构La_xSr_(1-x)TiO_3 (0≤x≤0.15)块体材料,与传统的固相反应法相比,烧结温度大幅降低.在室温至679 K的温度范围内测量了La_xSr_(1-x)TiO_3 (0≤x≤0.15)的Seebeck系数和电导率,确定了最佳La掺杂量x=0.08.La_0.08Sr_0.92TiO_3在679 K时,最大功率因子PF=2.95 μWm~(-1)·K~(-2),随温度升高,PF增大趋势明显,表明在高温环境中可具有更大的PF.
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| 关 键 词： | 钛酸锶 溶胶-凝胶 放电等离子烧结 电传输性能 |
Preparation and Electrical Transport Property of La_xSr_(1-x)TiO_3 Oxide Thermoelectric Materials |
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| Shang Pengpeng,Zhang Boping,Li Jingfeng,Zhao Lidong,Liu Weishu,Ma Ning.Preparation and Electrical Transport Property of La_xSr_(1-x)TiO_3 Oxide Thermoelectric Materials[J].Rare Metal Materials and Engineering,2009,38(Z2). |
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| Authors: | Shang Pengpeng Zhang Boping Li Jingfeng Zhao Lidong Liu Weishu Ma Ning |
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| Affiliation: | Shang Pengpeng1,Zhang Boping1,Li Jingfeng2,Zhao Lidong1,Liu Weishu1,Ma Ning1 (1. University of Science , Technology Beijing,Beijing 100083,China) (2. State Key Lab of New Ceramics , Fine Processing,Tsinghua University,Beijing 100084,China) |
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| Abstract: | The single phase perovskite La_xSr_(1-x)TiO_3 (0≤x≤0.15) ceramics were prepared by sol-gel process and spark plasma sintering (SPS). The thermal treating conditions were selected out through TG-DTA analysis of the drying gel. The phase structures of ceramics were studied with X-ray diffraction (XRD). The size and distribution of grains were tested by scanning electron microscopy (SEM). Sintering temperature of the as-prepared samples was significantly decreased compared with conventional solid-state reactions. Seebeck coefficient and electrical conductivity were measured from room temperature to 679 K. The optimal lanthanum doping content x was 0.08 mol, with which the La_0.08Sr_0.92TiO_3 sample shows the maximum power factor (PF) of 2.95 μW·m~(-1)·K~(-2) at 679 K. The larger PF would be obtained at higher measuring temperature. |
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| Keywords: | SrTiO_3 sol-gel spark plasma sintering electrical transport |
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