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CaCu3Ti4012 dielectric composite material and preparation method thereof

A composite material and dielectric technology, applied in the field of CaCu3Ti4012 dielectric composite material and its preparation, can solve the problems of small dielectric loss, large dielectric constant, low breakdown voltage and the like, achieve high breakdown voltage and simple preparation method Effect

Inactive Publication Date: 2017-02-15
CHENGDU SHANSHUI TIANXIA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention is to overcome existing CaCu 3 Ti 4 0 12 The defect that the breakdown voltage of polymer matrix composite dielectric material exists is low, provides a kind of CaCu 3 Ti 4 0 12 Dielectric composite material and preparation method thereof; the present invention contains CaCu 3 Ti 4 0 12 The grains are chemically coated-co-sintered to form BaO-CaCu with a thicker grain boundary layer 3 Ti 4 0 12 grains, thereby increasing the electric field strength of the grain boundary layer being broken down, so that it has the advantages of high breakdown voltage, large dielectric constant, and small dielectric loss, which promotes the application of composite dielectric materials in electronic devices

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of ceramic particles: A. Precursor preparation: Calcium carbonate, copper oxide and titanium dioxide were mixed and ball-milled according to the stoichiometric ratio, then pre-sintered at 1000°C for 8 hours, cooled, and ball-milled to obtain CaCu 3 Ti 4 0 12 Precursor particles; B, coating: 0.01molCaCu 3 Ti 4 0 12 Precursor particles are uniformly dispersed in 500ml of glycerol solution to form a mixed suspension, add 200ml, 0.01mol / L of barium hydroxide solution and 200ml, 0.01mol / L of sodium bicarbonate solution in the mixed suspension, react After coating for 2 hours, filter and dry to obtain CaCu coated with barium carbonate 3 Ti 4 0 12 Precursor particles; C, co-sintering: CaCu coated with barium carbonate 3 Ti 4 0 12 Precursor particles were sintered at 1480°C for 40 minutes, then cooled to 1250°C, sintered for 5 hours, and cooled to obtain ceramic particles;

[0026] (2) Compounding of ceramic particles and polymer matrix material: Take ...

Embodiment 2

[0028] (1) Preparation of ceramic particles: A. After mixing calcium carbonate, copper oxide and titanium dioxide according to the stoichiometric ratio and ball milling, pre-sintering at 950°C for 10 hours, cooling, and ball milling to obtain CaCu 3 Ti 4 0 12 Precursor particles; B, coating: 0.01molCaCu 3 Ti 4 0 12 Precursor particles are uniformly dispersed in 500ml of glycerol solution to form a mixed suspension, and 100ml, 0.03mol / L of barium hydroxide solution and 100ml, 0.03mol / L of sodium bicarbonate solution are added to the mixed suspension to react After coating for 1.5h, filter and dry to obtain CaCu coated with barium carbonate 3 Ti 4 0 12 Precursor particles; C, co-sintering: CaCu coated with barium carbonate 3 Ti 4 0 12 After the precursor particles were sintered at 1500°C for 30 minutes, the temperature was lowered to 1300°C, sintered for 2 hours, and cooled to obtain a high breakdown voltage ceramic dielectric material;

[0029] (2) Compounding of cera...

Embodiment 3

[0031] (1) Preparation of ceramic particles: Calcium carbonate, copper oxide and titanium dioxide were mixed and ball-milled according to the stoichiometric ratio, pre-sintered at 1050°C for 6 hours, cooled, and ball-milled to obtain CaCu 3 Ti 4 0 12 Precursor particles; B, coating: 0.015molCaCu 3 Ti 4 0 12 Precursor particles are uniformly dispersed in 500ml of glycerol solution to form a mixed suspension, add 10ml, 0.5mol / L of barium hydroxide solution and 10ml, 0.5mol / L of sodium bicarbonate solution in the mixed suspension, react After coating for 1 h, filter and dry to obtain CaCu coated with barium carbonate 3 Ti 4 0 12 Precursor particles; C, co-sintering: CaCu coated with barium carbonate 3 Ti 4 0 12 After the precursor particles were sintered at 1500°C for 60 minutes, the temperature was lowered to 1300°C, sintered for 2 hours, and cooled to obtain a high breakdown voltage ceramic dielectric material;

[0032] (2) Compounding of ceramic particles and polymer...

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Abstract

The invention discloses a CaCu3Ti4012 dielectric composite material and a preparation method thereof. The dielectric composite material comprises a polymer base material and ceramic particles, wherein the ceramic particles are BaO-CaCu3Ti4012 grain particles. The preparation method comprises the following step: carrying out chemical coating-co-sintering treatment on CaCu3Ti4012 grain particles to form the BaO-CaCu3Ti4012 crystal particles with a thicker grain boundary layer, thus the electric field intensity of puncturing the grain boundary layer is improved, and the CaCu3Ti4012 dielectric composite material has the advantages of high puncture voltage, large dielectric constant and less dielectric loss and promotes application of the composite dielectric material in an electron device.

Description

technical field [0001] The invention relates to the field of electronic materials, in particular to a CaCu 3 Ti 4 0 12 Dielectric composite materials and methods for their preparation. Background technique [0002] Dielectric material, also known as dielectric, is an insulating material that can be used to control the storage of charge and electric energy, and has an important strategic position in modern electronics and power systems. Dielectric materials mainly include capacitor dielectric materials and microwave dielectric materials. Among them, the dielectric material used as a capacitor medium requires a high resistivity and a large dielectric constant, which occupies a large proportion of the entire dielectric material. Dielectric materials can also be divided into two categories, organic and inorganic, with a wide variety. [0003] People's research on dielectric materials started from inorganic piezoelectric ceramic materials. Inorganic piezoelectric ceramic mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08K9/10C08K9/00C08K3/22
CPCC08K9/10C08K3/22C08K9/00
Inventor 王鸥
Owner CHENGDU SHANSHUI TIANXIA TECH CO LTD