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Dielectric energy storage ceramic powder, preparation method and application of dielectric energy storage ceramic powder in ceramic membrane

A ceramic powder, dielectric technology, applied in the direction of the conductive layer on the insulating carrier, can solve the problems of small dielectric loss, slow heat dissipation, and high equipment requirements, achieve small leakage current, avoid thermal breakdown, and low cost.

Active Publication Date: 2022-07-15
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

That is, the smaller the thickness of the ceramic, the greater the intrinsic breakdown field strength, while the bulk ceramic is too thick, the breakdown field strength is small, the material is easily crushed and the energy storage density is low
[0005] However, the corrosion resistance and wear resistance of ceramic thin films decrease as the thickness decreases, which makes it difficult for the ceramic thin film materials in the prior art to work in harsh environments such as high temperature and high pressure conditions.
However, during the use of ceramic thin films, the heat dissipation speed is slow, resulting in excessive leakage current of ceramic thin films and even thermal breakdown.
Moreover, the preparation methods of ceramic films in the prior art are mostly magnetron sputtering, grafting, homogeneous precipitation, impregnation-sintering or sol-gel methods, etc., which have high economic costs, complex preparation processes and equipment requirements. High disadvantage
[0006] In view of the above-mentioned defects in the existing dielectric energy storage ceramics, the present inventor has developed a dielectric energy storage ceramic powder, a preparation method and its Application in ceramic film, prepare a ceramic thick film, the dielectric loss is small, and at the same time avoid the problems of thermal breakdown and intrinsic breakdown

Method used

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Embodiment 1

[0052] Embodiment 1: A kind of dielectric energy storage ceramic powder, preparation method and its application in ceramic membrane

[0053] The dielectric energy storage ceramic powder provided in this embodiment has a molecular formula of (Ba 0.88 La 0.1 Li 0.02 )(Ti 0.96 Mg 0.04 )O 3 .

[0054] Its preparation method is as follows:

[0055] with BaCO 3 , La 2 O 3 , Li 2 CO 3 , TiO 2 and MgO as raw materials, the powder is ground and mixed by the ball milling process, and it is prepared by pre-sintering after sieving, wherein the proportion of each component is according to (Ba 0.88 La 0.1 Li 0.02 )(Ti 0.96 Mg 0.04 )O 3 Weigh, use zirconia balls with diameters of 5mm, 10mm, 15mm and 20mm as the grinding medium, deionized water as the grinding dispersant, use the ball mill to run alternately forward and reverse, and grind for 48h to obtain a mixed powder; dry the powder Passing through a 100-mesh sieve and pre-firing to obtain a dielectric energy storage cer...

Embodiment 2

[0065] Embodiment 2: A kind of dielectric energy storage ceramic powder, preparation method and its application in ceramic membrane

[0066] The dielectric energy storage ceramic powder provided in this embodiment has a molecular formula of (Ba 0.88 La 0.1 Li 0.02 )(Ti 0.96 Mg 0.04 )O 3 .

[0067] Its preparation method is as follows:

[0068] with BaCO 3 , La 2 O 3 , Li 2 CO 3 , TiO 2 and MgO as raw materials, the powder is ground and mixed by the ball milling process, and it is prepared by pre-sintering after sieving, wherein the proportion of each component is according to (Ba 0.88 La 0.1 Li 0.02 )(Ti 0.96 Mg 0.04 )O 3 Weigh, use zirconia balls with diameters of 5mm, 10mm, 15mm and 20mm as the grinding medium, deionized water as the grinding dispersant, use the ball mill to run alternately forward and reverse, and grind for 48h to obtain a mixed powder; dry the powder Passing through a 100-mesh sieve and pre-firing to obtain a dielectric energy storage cer...

Embodiment 3

[0078] Embodiment 3: A kind of dielectric energy storage ceramic powder, preparation method and its application in ceramic membrane

[0079] The dielectric energy storage ceramic powder provided in this embodiment has a molecular formula of (Ba 0.88 La 0.1 Li 0.02 )(Ti 0.96 Mg 0.04 )O 3 .

[0080] Its preparation method is as follows:

[0081] with BaCO 3 , La 2 O 3 , Li 2 CO 3 , TiO 2 and MgO as raw materials, the powder is ground and mixed by the ball milling process, and it is prepared by pre-sintering after sieving, wherein the proportion of each component is according to (Ba 0.88 La 0.1 Li 0.02 )(Ti 0.96 Mg 0.04 )O 3 Weigh, use zirconia balls with diameters of 5mm, 10mm, 15mm and 20mm as the grinding medium, deionized water as the grinding dispersant, use the ball mill to run alternately forward and reverse, and grind for 48h to obtain a mixed powder; dry the powder Passing through a 100-mesh sieve and pre-firing to obtain a dielectric energy storage cer...

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Abstract

The invention belongs to the technical field of ferroelectric ceramic energy storage, and particularly relates to dielectric energy storage ceramic powder, a preparation method and application of the dielectric energy storage ceramic powder in a ceramic membrane. The technical key points are as follows: the molecular formula of the dielectric energy storage ceramic powder is (Ba1-x-0. 02LaxLi0. 02) (Ti0. 96Mg0. 04) O3, wherein x is more than 0 and less than 0.98. According to the dielectric energy storage ceramic powder, the preparation method and the application of the dielectric energy storage ceramic powder in the ceramic film, the dielectric energy storage ceramic film with the thickness of 1-300 microns can be prepared at low cost, the ceramic thick film with the uniform grain size and the compact structure is obtained, and the dielectric loss of the ceramic thick film is 1t; 5%, which indicates that the ceramic has relatively small leakage current, thermal breakdown and intrinsic breakdown are effectively avoided, and meanwhile, a thick film with proper thickness has relatively large absolute energy storage capacity.

Description

technical field [0001] The invention belongs to the technical field of ferroelectric ceramic energy storage, in particular to a dielectric energy storage ceramic powder, a preparation method and its application in a ceramic membrane. Background technique [0002] Dielectric energy storage ceramics are widely used in power converters, pulsed electron beams and new energy vehicles due to their advantages of small size, fast charge and discharge speed, high power density and long cycle life. [0003] According to the formula It can be seen that higher energy storage density can be obtained by increasing the polarization difference and high breakdown field strength. The polarization strength is mainly determined by the material composition, and the breakdown field strength is not only affected by the material composition and structure, but also by the preparation process. [0004] Intrinsic breakdown is the main means to characterize the breakdown field strength. According to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622C04B35/626H01B5/14
CPCC04B35/4682C04B35/622C04B35/626C04B35/62218H01B5/14C04B2235/3215C04B2235/3227C04B2235/3203C04B2235/3206C04B2235/96C04B2235/9669
Inventor 方必军闫桂炜张帅陈智慧丁建宁
Owner CHANGZHOU UNIV
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