金属学报  2011, Vol. 47 Issue (1): 109-114    DOI: 10.3724/SP.J.1037.2010.00370

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Na1.4Co2O4基热电材料的溶胶-凝胶法制备及表征

厉英, 马北越, 王臻明, 姜茂发

东北大学材料与冶金学院, 沈阳 110819

PREPARATION OF Na1.4Co2O4 BASED THERMOELECTRIC MATERIALS BY SOL-GEL METHOD AND CHARACTERIZATION

LI Ying, MA Beiyue, WANG Zhenming, JIANG Maofa

School of Materials and Metallurgy, Northeastern University, Shenyang 110819

厉英 马北越 王臻明 姜茂发. Na_1.4Co₂O₄基热电材料的溶胶-凝胶法制备及表征[J]. 金属学报, 2011, 47(1): 109-114.
, , . PREPARATION OF Na_1.4Co₂O₄ BASED THERMOELECTRIC MATERIALS BY SOL-GEL METHOD AND CHARACTERIZATION[J]. Acta Metall Sin, 2011, 47(1): 109-114.

摘要 参考文献 相关文章 Metrics 全文: PDF(1112 KB)   摘要: 采用溶胶-凝胶法制备了掺杂Sr, Li和Cu的Na1.4Co2O4基热电材料, 采用XRD分析了Na1.4Co2O4基热电材料的相组成.通过DTA-TG曲线确定材料的预烧结和终烧结温度分别为450和850 ℃. 研究了掺杂量对Na1.4Co2O4基材料电阻率、Seebeck系数和功率因子等热电性能的影响. 结果表明, 掺杂Li可降低Na1.4Co2O4的电阻率, 掺杂 Sr和Cu使材料的电阻率增加; 掺杂Li和Cu可大幅度提高Na1.4Co2O4的Seebeck系数和功率因子; 掺杂Sr的改善效果不显著, 掺杂Li的效果最好; 当Li掺杂量为0.40, Na1.4Co2O4基热电材料的功率因子在15℃时达到最大值 7444.73 μW?m-1?K-2. 关键词 ： 热电材料,  钴酸盐,  热电性能,  掺杂,  溶胶-凝胶法     Abstract：Sr, Li and Cu-doped Na1.4Co2O4 based thermoelectric materials were prepared by sol-gel process. The phase constitution of Na1.4Co2O4 based thermoelectric materials was analyzed by XRD. According to DTA-TG curves, the pre-sintering and sintering temperatures of the materials were obtained to be 450 ℃ and 850 ℃, respectively. The influences of doping amount on the electrical resistivity, Seebeck coefficient and power factor of Na1.4Co2O4 based materials were investigated. The results showed that doping Li could decrease the electrical resistivity of Na1.4Co2O4, doping Sr and Cu could increase the electrical resistivity. Doping Li and Cu could improve the Seebeck coefficient and power factor of Na1.4Co2O4. The improving effect on Na1.4Co2O4 by doping Sr is not remarkable but by doping Li is the best. When 0.40 Li was doped, the power factor of Na1.0Li0.4Co2O4 at 15 ℃ reaches maximum value of 7444.73 μW?m-1?K-2. Key words： thermoelectric material    cobaltite    thermoelectric property    doping    sol-gel method 收稿日期: 2010-07-23      基金资助: 国家自然科学基金项目51074038和50774018资助 作者简介: 厉英, 女, 1963年生, 博士, 副教授 服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 厉英 马北越 王臻明 44.8K 链接本文: https://www.ams.org.cn/CN/10.3724/SP.J.1037.2010.00370      或      https://www.ams.org.cn/CN/Y2011/V47/I1/109 [1] Ibrahim M M, Saleh S A, Ibrahim E M M, Hakeem A M A. J Alloys Compd, 2008; 452: 200 [2] Xiang P H, Kinemuchi Y, Kaga H, Watari K. 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