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论文类型：期刊论文

发表时间：2018-02-01

发表刊物：JOURNAL OF THE EUROPEAN CERAMIC SOCIETY

收录刊物：SCIE、EI

卷号：38

期号：2

页面范围：807-811

ISSN号：0955-2219

关键字：SrTiO3; Mechanical alloying; Thermoelectric; Burial sintering; La doped

摘要：Thermoelectric Sr1-xLaxTiO3 (x = 0, 0.02, 0.05, 0.08) nanoparticles were directly prepared by mechanical alloying, followed by carbon burial sintering to produce the bulk counterparts, for the purpose of obtaining pure phase and fine microstructures in a facile process. Electrical and thermal transport properties have been measured over the temperature range from 300 K to 1100 K. La was successfully doped into the SrTiO3 during the milling process and acted as an n-type dopant. Core structure and superstructure in bulk samples, leads to a relatively high absolute Seebeck coefficient. The dimensionless figure-of-merit ZT changes with the increasing of La content and temperature, and the maximum ZT value can reach 0.06 at 300 K for x = 0.02 and 0.20 at 1000 K for x = 0.08. This strategy for bulk thermoelectric materials is simple, cost-effective and has great potential in large-scale industrial applications.