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首页> 外文期刊>Applied Physics Letteres >SrxBa1−xNb2O6−δ Ferroelectric-thermoelectrics: Crystal anisotropy, conduction mechanism, and power factor
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SrxBa1−xNb2O6−δ Ferroelectric-thermoelectrics: Crystal anisotropy, conduction mechanism, and power factor

机译:SrxBa1-xNb2O6-δ铁电热电学:晶体各向异性,传导机理和功率因数

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Nonstoichiometric tungsten bronze-structured ferroelectric SrxBa1−xNb2O6−u0001 u0001SBNu0002 single crystalsnwere found to be a promising n-type thermoelectric oxide. Thermopower anomalies were observednat the phase transition temperatures, depending on the degree of reduction as well as crystalnanisotropy. Above 500 K, heavily reduced SBN crystals show high thermoelectric power factorsnu0001u000320 u0002W/cm K2nat 516 Ku0002 with both thermopower and electrical conductivity higher parallel tonthe c-axis. It is noted that the power factor increases with temperature due to the semiconductingnbehavior with high carrier concentration. The carrier transport mechanism also varies with thendegree of reduction and temperature. © 2010 American Institute of Physics.nu0004doi:10.1063/1.3291563
机译:发现非化学计量钨青铜结构的铁电体SrxBa1-xNb2O6-u0001 u0001SBNu0002单晶是一种很有前途的n型热电氧化物。在相变温度处观察到热电异常,这取决于还原度和结晶各向异性。在500 K以上,大量还原的SBN晶体显示出较高的热电功率因数nu0001u000320 u0002W / cm K2nat 516 Ku0002,与c轴平行的热功率和电导率更高。注意,由于具有高载流子浓度的半导体行为,功率因数随温度而增加。载流子的输送机理也随还原度和温度的变化而变化。 ©2010美国物理研究所.nu0004doi:10.1063 / 1.3291563

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