Skutterudite based thermoelectric material, thermal protection coating for devices and preparation method thereof

A thermoelectric material and thermal protection technology, which can be used in thermoelectric device parts, coatings, etc., and can solve problems such as reducing the efficiency of thermoelectric devices

Active Publication Date: 2013-06-12
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existence of the metal bottom layer will inevitably lead to the existence of leakage current, which will undoubtedly reduce the efficiency of thermoelectric devices.

Method used

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  • Skutterudite based thermoelectric material, thermal protection coating for devices and preparation method thereof
  • Skutterudite based thermoelectric material, thermal protection coating for devices and preparation method thereof

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preparation example Construction

[0061] In a second aspect of the present invention, a method for preparing a skutterudite-based thermoelectric material and a thermal protection coating for a device is provided, the method comprising:

[0062] The organosilicon sol obtained after the hydrolysis and polymerization of the organosilane coupling agent at 4-80°C is the component A; the inorganic water-based silica sol is mixed with glass powder and other powder materials according to a certain ratio, and an appropriate amount of additives is added, and the mixture is evenly mixed by ball milling Component B is finally obtained; the organic component A and the inorganic component B are blended and stirred evenly, and then coated on the surface of the surface-treated skutterudite-based thermoelectric material to obtain an organic-inorganic composite heat-resistant and anti-oxidation coating .

[0063] In the present invention, the prepared composite slurry can be applied by various coating methods such as dip coatin...

Embodiment 1

[0077] Take 15.00 g of methyltrimethoxysilane, 5.00 g of ethanol, and 5.01 g of water, adjust the pH to 3-4 with nitric acid, and bathe in oil at 60°C for 10 minutes to obtain component A. Mix glass powder and silica sol uniformly at a ratio of 1:1 (parts by weight) to obtain component B. Blend B and A at a ratio of 1:5, and stir evenly to obtain the desired slurry. Apply the slurry on the surface of the skutterudite-based thermoelectric material that has been sandblasted (the π-type device is polished to 400 mesh), ultrasonically cleaned, and dried at 80°C, and cured once in a vacuum drying oven at 100°C×2 hours at a low temperature to obtain a coating.

Embodiment 2

[0079] Preparation of Component A: Blend 13.61 grams of methyltrimethoxysilane with 5.4 grams of deionized water adjusted to pH 4-5 with nitric acid, and stir in a water bath at 60°C for 20 minutes to obtain Component A, which is Hydrolyzed polymer product of methyltrimethoxysilane.

[0080] Preparation of Component B: Blend 4.99 g of glass powder with 5.09 g of silica sol, add an appropriate amount of dispersant and other additives, and ball mill at 206 rpm for 5 hours to obtain Component B. Next, component A was added to component B, and ball milled at 150 rpm for 20 minutes to obtain an organic-inorganic composite slurry. Coat it on the surface of the skutterudite-based thermoelectric material that has been sandblasted (the π-type device is ground to 400 mesh), ultrasonically cleaned, and dried at 80°C, cured once, and preheated in air: 60°C×4 hours , and then 100 °C x 2 hours. That is, a non-vitrified primary cured coating is obtained.

[0081] The slurry of Example 2 w...

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Abstract

The invention relates to a skutterudite based thermoelectric material, a thermal protection coating for devices and a preparation method thereof. The skutterudite based thermoelectric material and the thermal protection coating for the devices comprise the following components: 20-80 weight parts of organosilane, 3-60 weight parts of silica sol, 3-55 weight parts of glass powder and 3-50 weight parts of water. The invention further provides the preparation method of the skutterudite based thermoelectric material and the thermal protection coating for the devices.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric power generation, and relates to a two-component secondary curing thermal protective coating material, in particular to the protection of thermoelectric materials and devices. More specifically, the present invention provides a thermal protective coating applied to skutterudite-based thermoelectric materials and devices and a preparation method thereof. Background technique [0002] As a functional material that directly converts thermal energy and electrical energy, thermoelectric materials use their own Seebeck effect and Peltier effect to directly convert thermal energy and electrical energy. Thermoelectric power generation and refrigeration devices are small in size, light in weight, without any mechanical transmission parts, and work without noise. They have broad application prospects in aerospace technology, waste heat power generation, thermoelectric refrigerators, infrared detector...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D7/12C09D5/00H01L35/02
Inventor 陈立东董洪亮李小亚黄向阳江莞唐云山夏绪贵唐锦城何琳
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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