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Ca2-xSmxCo2O5热电材料的制备及性能

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Abstract:

采用溶胶-凝胶法,以柠檬酸为络合剂、乙二醇为分散剂、硝酸盐为原料制备Sm3+掺杂Ca2-xSmxCo2O5粉末。前驱粉体经过常压烧结制备块体材料,在室温至600℃,研究样品的电阻率ρ、Seebeck系数S和功率因子P。结果表明Sm3+摩尔掺量x=0.10~0.30时,与标准PDF37-0668对比,所有X射线衍射峰一致且没有偏移;当x=0.45时,出现Sm3+的杂质衍射峰。Sm3+掺杂对材料的热电性能有较大的提高,在很大程度上降低材料的ρ、提高S,当x=0.30时,样品的电学性能最佳,在600℃时P达到最大,为1.25×10-4W/(m·K2)。

References

[1]  BENNETT G L. CRC Handbook of Thermoelectrics [M]. New York: CRC Press, 1955: 2-5. [2] MANEEWAN S, KHEDARI J, ZEGHMATI B, et al. Investigation on generated power of thermoelectric roof solar collector [J]. Renew Energy, 2004, 29: 743-752. [3] ENRIGUE Macia. May quasicrystals be good thermoelectric materials [J]. Appl Phys Lett, 2000, 77(20): 3045-3047. [4] 邢学玲, 闵新民, 张文芹. 钴酸盐类氧化物热电材料的研究进展[J]. 材料导报, 2006, 2: 47-49. XING Xueling, MIN Xinmin, ZHANG Wenqin. Mater Rev (in Chinese), 2006, 2: 47-49. [5] MASASHI Mikami, RYOJI Funahashi. The effect of element substitution on high-temperature thermoelectric properties of Ca3Co2O6 compounds [J]. J Solid State Chem, 2005, 178: 1670-1674. [6] THINAHARAN C, ASWAL D K, SINGH A, et al. Growth and morphology of the single crystals of thermoelectric oxide material NaxCoO2 [J]. Cryst Res Technol, 2004, 39(7): 572-576. [7] 张艳峰, 张久兴, 路清梅, 等. 柠檬酸溶胶-凝胶法制备Ca3Co4O9粉体及结构表征[J]. 功能材料, 2005, 36(4): 597-599. ZHANG Yanfeng, ZHANG Jiuxing, LU Qingmei, et al. J Funct Mater (in Chinese), 2005, 36(4): 597-599. [8] MASSET A C, MICHEL C, MAIGNAN A. Misfit-layered cobaltite with an anisotropic giant magneto-resistance: Ca3Co4O9 [J]. Phys Rev B, 2000, 62(1): 166-174. [9] LIU P S, PEI J, CHEN G, et al. Preparation and characterization of the new oxides Ca2-xNaxCo2O5 [J]. Physica B, 2008 (403): 1808-1812. [10] 张艳峰, 张久兴. 放电等离子烧结制备Ca2Co2O5陶瓷过程中Co价态分析[J]. 河北师范大学学报(自然科学版), 2006 (30): 563-566. ZHANG Yanfeng, ZHANG Jiuxing. J Hebei Normal Univ (Nat Sci Ed), 2006, (30): 563-566. [11] WANG Y, SUI Y, CHENG J G. High temperature transport and thermoelectric properties of Ag-substituted Ca3Co4O9+δ system [J]. J Alloys Compd, 2008, 448: 1-5. [12] 马秋花, 赵昆渝, 李智东, 等. 热电材料综述[J]. 电工材料, 2004 (1): 43-47. MA Qiuhua, ZHAO Kunyu, LI Zhidong, et al. Electr Eng Alloy (in Chinese), 2004 (1): 43-47.

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