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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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 th

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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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Example Embodiment

[0041] The preparation method of the ceramic material using 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 , the raw materials are ball-milled to make them evenly mixed, then the raw materials are dried in an oven at 70-110°C, then ground and passed through a 150-200 mesh sieve;

[0043] (2) Pre-sintering the powder obtained in step (1), the pre-sintering of the powder is carried out in a pure oxygen atmosphere, the oxygen flow rate is 50-500 mL / min, the pre-sintering temperature is 800-900°C, and the temperature rise and fall rate is 2 ~5℃, holding time is 3~6h to obtain AgNbO 3 powder;

[0044] (3) To AgNbO 3 A certain concentration of polyvinyl alcohol solution is added to the powder, artificial granulation is performed, and powder with a preset particle size is screened; the mass ratio of polyvinyl alcohol and deionized water in...

Example Embodiment

[0052] Example 1

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

[0054] The silver niobate ceramic is 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, 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 are : The mass ratio of ball milling medium: ball milling solvent is 1:2:1; the mass ratio of large ball: medium ball: small ball in the ball milling medium is 1:2:2; the ball mill...

Example Embodiment

[0061] Example 2

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

[0063] The silver niobate ceramic is 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, 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 balls, wherein the mass ratio of raw material: ball milling medium: ball milling solvent is 1:2:2; the mass ratio of large balls: medium balls: small balls in the ball milling...

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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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