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Application of multifunctional silver niobate ceramic in electrocaloric effect refrigeration technology

An electro-card effect, silver niobate technology, applied in the field of all-solid-state refrigeration of microelectronic devices, to achieve the effect of widening the scope of application, great practical value and good stability

Pending Publication Date: 2020-06-05
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide an application of silver niobate ceramics in the cooling effect of the electric card, especially to provide a ceramic material for cooling by the electric card effect, which has both the positive electric card effect and the negative electric card effect, and The ceramic material of the present invention avoids the use of lead-based materials, and overcomes the problems of using lead-based ceramic materials in the prior art

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  • Application of multifunctional silver niobate ceramic in electrocaloric effect refrigeration technology
  • Application of multifunctional silver niobate ceramic in electrocaloric effect refrigeration technology
  • Application of multifunctional silver niobate ceramic in electrocaloric effect refrigeration technology

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preparation example Construction

[0041] The preparation method of the ceramic material applied with the above-mentioned multifunctional silver niobate ceramics comprises the following steps:

[0042] (1) Weigh an appropriate amount of Ag according to the chemical formula 2 O and Nb 2 o 5 , ball milling the raw materials to make them evenly mixed, then drying the raw materials in an oven at 70-110°C, then grinding and passing through a 150-200 mesh sieve;

[0043] (2) Pre-calcine the powder obtained in step (1). The pre-calcination of the powder is carried out under a pure oxygen atmosphere. ~5℃, the holding time is 3~6h, to get AgNbO 3 Powder;

[0044] (3) to AgNbO 3 A certain concentration of polyvinyl alcohol solution is added to the powder, artificially granulated, and the powder with a preset particle size is screened; the mass ratio of polyvinyl alcohol and deionized water in the polyvinyl alcohol solution is 4% to 7%, and the polyvinyl alcohol solution is 4% to 7%. The amount of vinyl alcohol adde...

Embodiment 1

[0053] This embodiment provides the application of a kind of silver niobate ceramics in electric card effect refrigeration technology, and the chemical formula of this multifunctional silver niobate ceramics is Ag x NbO 2.5+x / 2 , the x is 1.01.

[0054] The silver niobate ceramics are synthesized by a solid-phase synthesis method under an oxygen atmosphere, and the preparation method comprises the following steps:

[0055] (1) Weigh an appropriate amount of Ag according to the chemical formula 2 O and Nb 2 o 5 , the raw materials are ball milled to make them evenly mixed, and then the raw materials are dried in an oven at 70°C, then ground and passed through a 150-mesh sieve; the ball milling solvent is alcohol; the ball milling medium is zirconia balls or agate balls, wherein the raw materials : The mass ratio of ball milling medium: ball milling solvent is 1:2:1; the mass ratio of large balls: medium balls: small balls in the ball milling medium is 1:2:2; the ball millin...

Embodiment 2

[0062] This embodiment provides the application of a kind of silver niobate ceramics in electric card effect refrigeration technology, and the chemical formula of this multifunctional silver niobate ceramics is Ag x NbO 2.5+x / 2 , the x is 1.00.

[0063] The silver niobate ceramics are synthesized by a solid-phase synthesis method under an oxygen atmosphere, and the preparation method comprises the following steps:

[0064] (1) Weigh an appropriate amount of Ag according to the chemical formula 2 O and Nb 2 o 5 , the raw materials are ball-milled to make them evenly mixed, and then the raw materials are dried in an oven at 90°C, then ground and passed through a 200-mesh sieve; the ball-milling solvent is a mixed liquid of alcohol and deionized water; the ball-milling medium is zirconia balls Or agate ball, wherein, raw material: ball milling medium: the mass ratio of ball milling solvent is 1:2:2; In the ball milling medium, the mass ratio of large ball: medium ball: small ...

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Abstract

The invention discloses an application of a multifunctional silver niobate ceramic in an electrocaloric effect refrigeration technology, a chemical formula of the silver niobate ceramic is AgxNbO2.5+x / 2, and x is greater than or equal to 1 and less than or equal to 1.05. According to the silver niobate ceramic material capable of being used for electrocaloric effect refrigeration, the silver niobate ceramic material has the electrocaloric effect and the positive electrocaloric effect at the same time in a specific temperature interval, the positive electrocaloric effect and the negative electrocaloric effect work cooperatively, and the refrigeration efficiency of the electrocaloric effect can be effectively improved; moreover, the preparation method of the silver niobate ceramic material has the characteristics of simple process, good stability and environmental friendliness; the product is suitable for developing a miniature refrigerator with high refrigeration efficiency, has important practical value, expands the application of the silver niobate material from the fields of piezoelectricity, energy storage, photocatalysis and the like to the field of electrocaloric effect refrigeration, and widens the application range of the silver niobate material.

Description

technical field [0001] The invention relates to the technical field of all-solid-state refrigeration for microelectronic devices, in particular to the application of a multifunctional silver niobate ceramic in electric card effect refrigeration technology. Background technique [0002] With the rapid development of electronic science and technology, electronic equipment tends to be miniaturized, integrated and multifunctional. However, too many electronic components are packaged in a unit volume of electronic equipment, and a large amount of heat is released by the device, which will not only seriously affect the working stability of the device, but also shorten the service life of the device. In recent years, refrigeration technology based on the electric card effect of ferroelectric / antiferroelectric materials has attracted widespread attention. It mainly refers to the entropy change in ferroelectric / antiferroelectric materials caused by the action of an external electric ...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/622C04B41/88H01L35/28
CPCC04B35/495C04B35/622C04B41/5116C04B41/88C04B2235/3291C04B2235/6562C04B2235/6567H10N10/10
Inventor 杜金花赵烨郝喜红
Owner INNER MONGOLIA UNIV OF SCI & TECH
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