【摘 要】
：
Layered cobalt oxides,mainly including MxCoO2 (M=Na,Ca or Sr),Ca3Co4O9 and Bi2Sr2Co2Oy,have attracted great attention as promising thermoelectric materials due
【机 构】
：
The College of Physics Science and Technology, Hebei University, Baoding 071002 “,”School of Informa
论文部分内容阅读
Layered cobalt oxides,mainly including MxCoO2 (M=Na,Ca or Sr),Ca3Co4O9 and Bi2Sr2Co2Oy,have attracted great attention as promising thermoelectric materials due to their good thermoelectric performance,low cost and high resistance of oxidation at high temperature in air.[1-3] The crystal structure of these cobalt oxides is composed of two different layers,with an alterative stacking of the conductive CoO2 layer and the insulating Nax (Cax or Srx),Ca2CoO3 or Bi2Sr2O4 layer along the c-axis.This layered structure results in highly anisotropic electronic transport properties with ab-plane Seebeck coefficient Sab being much larger than that of the out-of-plane coefficient Sc.Recently,the laser-induced transverse voltage (LITV) effect has been extensively investigated in the c-axis tilted layered cobalt oxides.[4-9] Detailed studies on the dependence of the induced voltage on the film thickness,the tilted angle as well as the laser irradiation wavelength and direction suggest that the LITV in these layered cobalt oxides mainly originates from the transverse thermoelectric effect.
其他文献
The prolate-oblate shape phase transition in the interacting boson model is investigated for finite N as well as in the large-N classical limit by adopting the
Using the Bs meson wave function extracted from non-leptonic Bs decays,we evaluate the rare decays Bs →e+ e-γ (e =e,μ) in the standard model,including contri
论述了轨道式擦窗机轨道设计的要求和具体设计计算方法,针对轨道设计常出现的问题,分析并提出了相应的措施和较为实用的设计参考.
The physical-mechanism based high-temperature thermal contact conductance model is proposed,in which the temperature effect on the material properties and inter
“十五”期间,中国经济持续快速稳定增长,我国工程机械行业取得快速发展,令世人瞩目.过去的5年里,行业发展经历了回升、火爆、回落、调整的过程,可谓风起云涌、跌宕起伏.全行
轮式装载机一般装有两个独立的制动系统,即行车制动系统和停车制动系统。目前国产装载机行车制动系统主要采用气顶油钳盘式制动器,只有少数高配置的装载机采用湿式制动,而停
Over the past decades,significant attention has been paid to the phase separations in block copolymers and their mixtures due to their potential applications su
The temperature,duration,activation energy,and A vrami exponent of the solid phase transformation β1 → α+β2 of TC4 titanium alloy treated at 3 GPa in a cool
本文应用模块化方法,构造出摆动油缸机构、绞接二杆组及刚体平面运动分析的通用模块,应用于液压挖掘机运动学仿真,开发出仿真CAD系统,为液压挖掘机运动学设计与分析提供了强
介绍了通过对TM系统的改进,在混凝土搅拌运输车手动油门发动机的底盘上,实现液压油泵排量及发动机油门的双重电控操纵,从而提高了混凝土搅拌运输车操纵控制系统的可靠性和安