A cadmium-stibium-based p type thermal electrical material and its making method

A thermoelectric material, antimony-based technology, applied in the direction of thermoelectric device junction lead-out materials, etc., can solve the problems of thermoelectric properties that have not been reported

Inactive Publication Date: 2008-01-09
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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Problems solved by technology

At present, the thermoelectric properties of this compound have not been reported, and we found

Method used

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  • A cadmium-stibium-based p type thermal electrical material and its making method
  • A cadmium-stibium-based p type thermal electrical material and its making method

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Embodiment Construction

[0014] In the glove box, weigh 0.674g of Cd particles (99.999%), 0.525g of Yb metal (99.9%), and 0.731g of antimony particles (99.999%), and put the raw materials into a 25mm× Put the crucible in a graphite crucible with a diameter of Φ10mm, and then put the crucible into a quartz tube with an inner diameter of Φ11mm, plug it with a rubber stopper and take it out from the glove box. Then quickly evacuate it with a vacuum pump until the vacuum degree reaches 1×10 -6 When torr, it is sealed with a hydrogen-oxygen flame. Then put it into a heating furnace, raise the temperature to 900°C at a rate of 1°C / min, keep it warm for 72 hours, and take it out with the furnace cooling. The product was confirmed as YbCd by powder XRD 2 Sb 2 pure phase. The obtained sample is ground into powder, and then sintered at 450° C., 50 MPa, and vacuum atmosphere for about 15 minutes by using rapid plasma sintering (SPS). The density of the obtained ceramic sample is about 98%. Then the thermal...

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Abstract

The present invention relates to a cadmium-stibium base p type thermoelectric material and its preparation method, belonging to the field of thermoelectric converting material. The present invention thermoelectric material composition formula is: RCd2-xZnxSb2-ySy, wherein R is one or two solid solution with arbitrary proportion of Yb, Eu, Ca, Sr and Ba; x is Zn solid solution component, range is more than or equal to 0 and less than 2; S is one of Ge, Sn, Se and Te; y is S doped real component, range is more than or equal to 0 and less than or equal to 0.2. Method for using vacuum or inert gas solid-phase to synthesis, speed plasma sintering (SPS) or thermal pressing sintering to prepare compact ceramic sample. The sample YbCd2Sb2 ZT value reaches to 0.8 at 430 DEG C, corresponding with the current used for middle temperature section (200 DEG C to 500 DEG C) mature thermoelectric material PbTe alloy (ZT 430 DEG C equals to 0.8), the present invention also increases its thermoelectric converting efficient through solid-phase and doped, the model thermoelectric material preparation method is simple and stable in air, can be used for thermoelectric converting apparatus.

Description

technical field [0001] The invention relates to a cadmium-antimony-based p-type intermetallic compound thermoelectric conversion material and a preparation method thereof, belonging to the field of thermoelectric conversion materials. Background technique [0002] Thermoelectric conversion technology uses the Seebeck effect and Peltier effect of semiconductor materials to directly convert heat and electricity, including thermoelectric power generation and thermoelectric refrigeration. [1-2] . The thermoelectric conversion system has the advantages of small size, high reliability, no pollution, no noise, wide applicable temperature range, etc. As a special power supply and high-precision temperature control device, it has been widely used in high-tech fields such as space technology, military equipment, and IT technology. application. In recent years, thermoelectric conversion technology, as a new type of clean energy technology, has received widespread attention internatio...

Claims

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Application Information

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IPC IPC(8): H01L35/16H01L35/18C22C29/00C22C1/04
Inventor 王小军赵景泰陈昊鸿杨昕昕
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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