Method for producing magnesium-based thermoelectric conversion material, method for producing magnesium-based thermoelectric conversion element, magnesium-based thermoelectric conversion material, magnesium-based thermoelectric conversion element, and thermoelectric conversion device
A thermoelectric conversion material and a thermoelectric conversion technology are applied in the fields of the manufacture of magnesium-based thermoelectric conversion materials, the manufacture of magnesium-based thermoelectric conversion elements, the magnesium-based thermoelectric conversion materials, the magnesium-based thermoelectric conversion elements and thermoelectric conversion devices, and can solve the problem of thermoelectric conversion. Material damage, low mechanical strength and other problems, to achieve the effect of high thermoelectric conversion efficiency, excellent mechanical strength and low cost
Active Publication Date: 2022-02-01
MITSUBISHI MATERIALS CORP
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Problems solved by technology
In addition, when used as a vehicle-mounted device, such as generating electricity from waste heat of the engine exhaust gas of an automobile, the thermoelectric conversion material may be damaged due to the low mechanical strength due to the running vibration of the vehicle, etc.
Method used
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[0154] Examples of the present invention are shown below.
[0155] As Examples and Comparative Examples, 10.5 g of Mg with a purity of 99.9% (particle size: 180 μm: manufactured by KOJUNDOCHEMICAL LABORATORY CO., LTD.) and Si with a purity of 99.99% (particle size: 300 μm: manufactured by KOJUNDOCHEMICAL LABORATORY CO., LTD.) 5.75 g, Sb with a purity of 99.9% (particle size: 300 μm: manufactured by KOJUNDOCHEMICAL LABORATORY CO., LTD.) 0.374 g. These powders were uniformly mixed in a mortar and put into an alumina crucible, and heated at 850°C for 2 hours in Ar-5%H 2 heated in. In consideration of the deviation from the stoichiometric composition of Mg:Si=2:1 due to the sublimation of Mg, 5% more Mg was mixed. From this we get Mg 2 Si solid substance (base material).
[0156] Next, in a mortar, the Mg 2 The Si solid material (base material) is pulverized into finer particles, and the powder is classified to produce Sb-doped Mg with a particle size of 75 μm or less. 2 Si ...
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Abstract
The manufacturing method of the magnesium-based thermoelectric conversion material of the present invention includes: a raw material forming step of adding silicon oxide in the range of 0.5 mol% to 13.0 mol% to the magnesium-based compound to form a sintered raw material; and a sintering step of The sintered raw material is heated at a temperature range of 750° C. to 950° C. while pressurizing the sintered raw material with a pressure of 10 MPa or more to form a sintered body.
Description
technical field [0001] The present invention relates to a method for manufacturing magnesium silicide-based, magnesium-tin-based, magnesium-germanium-based thermoelectric conversion materials excellent in thermoelectric conversion efficiency, a method for manufacturing magnesium silicide-based, magnesium-tin-based, magnesium-germanium-based thermoelectric conversion elements, magnesium silicide-based, Magnesium-tin-based, magnesium-germanium-based thermoelectric conversion materials, and magnesium silicide-based, magnesium-tin-based, magnesium-germanium-based thermoelectric conversion elements and thermoelectric conversion devices using these thermoelectric conversion materials. [0002] This application claims priority based on Patent Application No. 2016-033344 filed in Japan on February 24, 2016 and Patent Application No. 2017-023093 filed in Japan on February 10, 2017, and the contents thereof are incorporated herein. Background technique [0003] A thermoelectric conver...
Claims
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IPC IPC(8): H01L35/34B22F3/14C01B33/06C22C1/05C22C23/00H01L35/14H01L35/26H01L35/32
CPCB22F3/14C01B33/06C22C1/05C22C23/00C04B35/58085C04B35/645C04B35/6455C04B2235/3418C04B2235/3891C04B2235/40C04B2235/401C04B2235/402C04B2235/407C04B2235/408C04B2235/421C04B2235/428C04B2235/5436C04B2235/6581C04B2235/666C04B2235/728C04B2235/761C04B2235/80C04B2235/96C22C1/053C22C1/1084H10N10/851H10N10/857H10N10/855H10N10/17H10N10/01H10N10/13H10N10/81B22F3/1039B22F3/15B22F2003/1051B22F2003/175B22F2003/185B22F2003/208
Inventor 中田嘉信
Owner MITSUBISHI MATERIALS CORP