摘要:
A thermoelectric device formed of nanowires on the nm scale. The nanowires are preferably of a size that causes quantum confinement effects within the wires. The wires are connected together into a bundle to increase the power density.
摘要:
Transition metals (T) of Group VIII (Co, Rh and Ir) have been prepared as semiconductor alloys with Sb having the general formula TSb.sub.3. The skutterudite-type crystal lattice structure of these semiconductor alloys and their enhanced thermoelectric properties results in semiconductor materials which may be used in the fabrication of thermoelectric elements to substantially improve the efficiency of the resulting thermoelectric device. Semiconductor alloys having the desired skutterudite-type crystal lattice structure may be prepared in accordance with the present invention by using vertical gradient freeze techniques, liquid-solid phase sintering techniques, low temperature powder sintering and/or hot-pressing. Measurements of electrical and thermal transport properties of selected semiconductor materials prepared in accordance with the present invention, demonstrated high Hall mobilities (up to 8000 cm.sup.2.V.sup.-1.s.sup.-1), good Seebeck coefficients (up to 400 .mu.VK.sup.-1 between 300.degree. C. and 700.degree. C.), and low thermal conductivities (as low as 15 mW/cmK). Optimizing the transport properties of semiconductor materials prepared from elemental mixtures Co, Rh, Ir and Sb resulted in a two fold increase in the thermoelectric figure of merit (ZT) at temperatures as high as 400.degree. C. for thermoelectric elements fabricated from such semiconductor materials.
摘要:
The present invention is embodied in high performance p-type thermoelectric materials having enhanced thermoelectric properties and the methods of preparing such materials. In one aspect of the invention, p-type semiconductors of formula Zn4−xAxSb3−yBy wherein 0≦x≦4, A is a transition metal, B is a pnicogen, and 0≦y≦3 are formed for use in manufacturing thermoelectric devices with substantially enhanced operating characteristics and improved efficiency. Two methods of preparing p-type Zn4Sb3 and related alloys of the present invention include a crystal growth method and a powder metallurgy method.
摘要翻译:本发明体现在具有增强的热电性能的高性能p型热电材料和制备这种材料的方法中。 在本发明的一个方面,式Zn 4-x A x Sb 3-y B y y的p型半导体, 其中0 <= x <= 4,A是过渡金属,B是pnicogen,并且形成0 <= y <= 3,用于制造具有显着增强的操作特性和提高效率的热电器件。 制备本发明的p型Zn 4 Sb 3 O 3和相关合金的两种方法包括晶体生长法和粉末冶金法。
摘要:
A high-efficiency thermoelectric unicouple is used for power generation. The unicouple is formed with a plurality of legs, each leg formed of a plurality of segments. The legs are formed in a way that equalized certain aspects of the different segments. Different materials are also described.
摘要:
A device for generating power to run an electronic component. The device includes a heat-conducting substrate (composed, e.g., of diamond or another high thermal conductivity material) disposed in thermal contact with a high temperature region. During operation, heat flows from the high temperature region into the heat-conducting substrate, from which the heat flows into the electrical power generator. A thermoelectric material (e.g., a Bi2Te3-based film or other thermoelectric material) is placed in thermal contact with the heat-conducting substrate. A low temperature region is located on the side of the thermoelectric material opposite that of the high temperature region. The thermal gradient generates electrical power and drives an electrical component.
摘要翻译:一种用于产生运行电子部件的电力的装置。 该装置包括与高温区域热接触设置的导热基板(例如由金刚石或另一高导热材料构成)。 在运行期间,热量从高温区域流入导热基板,热量流入发电机。 将热电材料(例如,Bi 2 Te 3基膜或其它热电材料)放置成与导热基板热接触。 低温区域位于热电材料的与高温区域相反的一侧。 热梯度产生电力并驱动电气部件。
摘要:
Transition metals (T) of Group VIII (Co, Rh and Ir) have been prepared as semiconductor alloys with Sb, P, and As, having the general formula TX, wherein X is Sb.sub.3, P.sub.3, or As.sub.3. The skutterudite-type crystal lattice structure of these semiconductor alloys and their enhanced semiconductor properties results in semiconductor materials which may be used in the fabrication of power semiconductor devices to substantially improve the efficiency of the resulting semiconductor device. Semiconductor alloys having the desired skutterudite-type crystal lattice structure may be prepared in accordance with the present invention by using vertical gradient freeze techniques, liquid-solid phase sintering techniques, low temperature powder sintering and/or hot-pressing.
摘要翻译:已经制备了第Ⅷ族(Co,Rh和Ir)的金属过渡金属(Co,Rh和Ir),其具有通式为Sb TX with with with with with with with with with with with with with with with with with with with with or or or or or 这些半导体合金的方钴矿型晶格结构及其增强的半导体特性产生可用于制造功率半导体器件的半导体材料,以显着提高所得半导体器件的效率。 具有期望的方钴矿型晶格结构的半导体合金可以通过使用垂直梯度冷冻技术,液相 - 固相烧结技术,低温粉末烧结和/或热压法,根据本发明制备。
摘要:
New skutterudite phases including Ru.sub.0.5 Pd.sub.0.5 Sb.sub.3, RuSb.sub.2 Te, and FeSb.sub.2 Te, have been prepared having desirable thermoelectric properties. In addition, a novel thermoelectric device has been prepared using skutterudite phase Fe.sub.0.5 Ni.sub.0.5 Sb.sub.3. The skutterudite-type crystal lattice structure of these semiconductor compounds and their enhanced thermoelectric properties results in semiconductor materials which may be used in the fabrication of thermoelectric elements to substantially improve the efficiency of the resulting thermoelectric device. Semiconductor materials having the desired skutterudite-type crystal lattice structure may be prepared in accordance with the present invention by using powder metallurgy techniques. Measurements of electrical and thermal transport properties of selected semiconductor materials prepared in accordance with the present invention, demonstrated high Hall mobilities and good Seebeck coefficients. These materials have low thermal conductivity and relatively low electrical resistivity, and are good candidates for low temperature thermoelectric applications.
摘要:
The present invention is embodied in high performance p-type thermoelectric materials having enhanced thermoelectric properties and the methods of preparing such materials. In one aspect of the invention, p-type semiconductors of formula Zn4−xAxSb3−yBy wherein 0≦x≦4, A is a transition metal, B is a pnicogen, and 0≦y≦3 are formed for use in manufacturing thermoelectric devices with substantially enhanced operating characteristics and improved efficiency. Two methods of preparing p-type Zn4Sb3 and related alloys of the present invention include a crystal growth method and a powder metallurgy method.
摘要翻译:本发明体现在具有增强的热电性能的高性能p型热电材料和制备这种材料的方法中。 在本发明的一个方面,式Zn4-xAxSb3-yBy的p型半导体,其中0≤x≤4,A是过渡金属,B是pnicogen,并且形成0 <= y <= 3 在制造具有显着提高的操作特性和提高的效率的热电器件中。 制备本发明的p型Zn4Sb3和相关合金的两种方法包括晶体生长法和粉末冶金法。
摘要:
Transition metals of Group VIII (Co, Rh and Ir) have been prepared as semiconductor compounds with the general formula TSb.sub.3. The skutterudite-type crystal lattice structure of these semiconductor compounds and their enhanced thermoelectric properties results in semiconductor materials which may be used in the fabrication of thermoelectric elements to substantially improve the efficiency of the resulting thermoelectric device. Semiconductor materials having the desired skutterudite-type crystal lattice structure may be prepared in accordance with the present invention by using vertical gradient freezing techniques and/or liquid phase sintering techniques. Measurements of electrical and thermal transport properties of selected semiconductor materials prepared in accordance with the present invention, demonstrated high Hall mobilities (up to 1200 cm.sup.2.V.sup.-1.s.sup.-1) and good Seebeck coefficients (up to 150 .mu.VK.sup.-1 between 300.degree. C. and 700.degree. C.). Optimizing the transport properties of semiconductor materials prepared from elemental mixtures Co, Rh, Ir and Sb resulted in a substantial increase in the thermoelectric figure of merit (ZT) at temperatures as high as 400.degree. C. for thermoelectric elements fabricated from such semiconductor materials.
摘要:
The crystalline structure of cadmium telluride grown in a Bridgman process is enhanced by applying vibrations at a frequency less than 1000 hertz at a low amplitude whereby the cadmium telluride has vibrations with a displacement of less than one-tenth millimeter.