【摘 要】
：
Antimony telluride(Sb2Te3)and its based alloys are of importance p-type semiconductors for the thermoelectric applications near room temperature.Herein,we report a simple,low-energy intensive and scal
【机 构】
：
Guangxi Key Laboratory of Information Material,Guangxi Collaborative Innovation Center of Structure
【出 处】
：
第六届海内外中华青年材料科学技术研讨会暨第十五届全国青年材料科学技术研讨会
论文部分内容阅读
Antimony telluride(Sb2Te3)and its based alloys are of importance p-type semiconductors for the thermoelectric applications near room temperature.Herein,we report a simple,low-energy intensive and scalable surfactant-assisted reflux method for the synthesis of Sb2Te3 nanoparticles in the solvent of ethylene glycol(EG)at low temperatures(120~180 ℃).The formation mechanism of plate-like Sb2Te3 nanoparticles is proposed.And it is found that the size,shape and chemical composition of the products could be controlled by the introduction of the organic surfactants(CTAB,PVP and etc.)or inorganic salts(EDTA-Na2,NaOH and etc.).Additionally,the collected Sb2Te3 nanoparticles were further fabricated into nanostructured pellets using cold-compaction and annealing techniques.The low resistivity(7.37~19.4 × 10-6 Ω m),moderate Seebeck coefficient(103~141 μtV/K)and high power factor(10~16 × 10-4 W m-1 K-2)have been achieved in our Sb2Te3 nanostructured bulks.The relatively low thermal conductivity(1.32~1.55 W m-1 K-1)is attained in the nanobulk made of PVP-modified nanoparticles and the values of ZT in the range of 0.24~0.37 are realized at the temperatures ranging from 50 ℃ to 200 ℃.Our researches set forth a new avenue in promoting practical applications of Sb2Te3-based thermoelectric power generation or cooling devices.
其他文献
Due to the intrinsic inertness of titanium surface,and the long period(usually more than 4weeks)for deposition of a fully covered apatite layer through immersion in SBF [1],our research indicated high
PbTe is known to be a promising thermoelectric material for waste heat recovery,so it has been the subject of extensive research and high thermoelectric performances have been obtained.Here,we will sh
At the initial strain rate of 10-2 s-1,superior superplastic ductility of> 800%can be obtained at a wide temperature range(475~525 ℃)by adding 0.25 Sc and 0.10 Zr into a simple thermo-mechanical proce
层状化合物由于具有特殊的结构、功能特性，在能源、环境等方面具有特殊的应用。在热电材料中，层状化合物具有本征的超晶格结构，能够增加界面及原子无序化对晶格声子的散射，获得低的热导率。除此之外，层状材料中电子传输通道，具有一定的局域化，有望获得高的电导率和西贝克系数。在本次报告中，将对Ca-Co-O和BiCuSeO两种p型层状结构进行研究，探讨层状结构材料的调控，特别是在纳米尺度方面的一些工作。对于Ca
Half-Heusler(HH)compounds are important high temperature thermoelectric(TE)materials having attracted considerable attention in the recent years.High figure of merit zT values of 0.8~1.0 have been obt
As a family of promising thermoelectric materials,the BiCuSeO oxyselenides have recently acquired ever-increasing attention thus being extensively studied.The figure of merit ZT of the BiCuSeO-based t
Lead chalcogenides are dominant thermoelectric materials in the medium-temperature range,owing to their highly favorable electronic band structures and low thermal conductivities achievable.An importa
Lead-free SnTe compound shows promising good thermoelectric performance.However,stoichiometric SnTe is a strongly p-type semiconductor with a carrier concentration of about 1×1020 cm-3,which correspon
SbCrSe3 has a unique quasi-one-dimensional structure in which two parallel chains of CrSe6 octahedra are linked by antimony atoms to form the pseudo one dimensional crystal structure.Such quasi-one-di
Low lattice thermal conductivity(L)is a key parameter for high efficient thermoelectric materials.There are generally several strategies for low L,such as stronger low sound velocity,phonon-phonon int