Composite material with high dielectric constant and preparation method thereof

A technology of high dielectric constant and composite material, applied in the field of materials, can solve the problems of high cost and complicated preparation process, and achieve the effect of low cost, large dielectric constant and low price

Active Publication Date: 2011-05-18
YANCHENG LANBANG TECHN FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of the existing ceramic matrix composites use more expensive raw materials (such as Ag, Pt) and the preparation process is complicated. How to reduce manufacturing costs and carry out cost-effective design is the main issue to expand the application of ceramic matrix composites.

Method used

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  • Composite material with high dielectric constant and preparation method thereof
  • Composite material with high dielectric constant and preparation method thereof
  • Composite material with high dielectric constant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for preparing a high dielectric constant composite material, characterized in that it comprises the following steps,

[0035] In the first step, barium titanate powder and copper powder are used as raw materials, according to BaTiO 3 / xCu, x=30wt.% carry out batching;

[0036] In the second step, the raw material, ball milling medium and ball stone are mixed, and then ball milled on a planetary ball mill for 4 hours in a resin ball mill tank, wherein the mass ratio of raw material, ball milling medium and ball stone is: raw material: ball milling medium: ball stone=1 :1:1.5;

[0037] The third step is to dry the ball-milled slurry in a vacuum oven at a temperature not higher than 50°C, then use PVA with a concentration of 3% to granulate, pass the granulated granules through a 150-mesh sieve, and stale for 24 hours;

[0038] The fourth step is to put the stale grains into a steel mold and press them into a cylindrical green body under a pressure of 5MPa, hold...

Embodiment 2

[0043] A method for preparing a high dielectric constant composite material, characterized in that it comprises the following steps,

[0044] In the first step, barium titanate powder and copper powder are used as raw materials, according to BaTiO 3 / xCu, x=10wt.% carry out batching;

[0045] In the second step, the raw material, ball milling medium and ball stone are mixed, and then ball milled on a planetary ball mill for 4 hours in a resin ball mill tank, wherein the mass ratio of raw material, ball milling medium and ball stone is: raw material: ball milling medium: ball stone=1 :1.2:2;

[0046] The third step is to dry the ball-milled slurry in a vacuum oven at a temperature not higher than 50°C, and then use PVA with a concentration of 4% to granulate, pass the granulated granules through a 150-mesh sieve, and stale for 24 hours;

[0047] The fourth step is to put the stale grains into a steel mold and press them into a cylindrical green body under a pressure of 5MPa, ...

Embodiment 3

[0052] A method for preparing a high dielectric constant composite material, characterized in that it comprises the following steps,

[0053] In the first step, barium titanate powder and copper powder are used as raw materials, according to BaTiO 3 / xCu, x=1wt.% for batching;

[0054] In the second step, raw materials, ball milling media and ball stones are mixed, and then ball milled on a planetary ball mill for 4 hours in a resin ball mill tank, wherein the mass ratio of raw materials, ball milling media and ball stones is: raw materials: ball milling media: ball stones=1.5 :1.5:2;

[0055] The third step is to dry the ball-milled slurry in a vacuum oven at a temperature not higher than 50°C, and then use PVA with a concentration of 5% to make granules. The granulated granules are passed through a 150-mesh sieve and aged for 24 hours;

[0056] The fourth step is to put the stale grains into a steel mold and press them into a cylindrical green body under a pressure of 5MPa...

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Abstract

The invention provides a composite material with a high dielectric constant. The composition of the composite material is expressed as BaTiO3 / xCu, wherein x is 0 to 30 weight percent. The invention also provides a preparation method of the material, which comprises: mixing barium strontium titanate powder and copper powder, which serve as raw materials, according to a BaTiO3 to Cu ratio of 1:x, wherein the x is 0 to 30 weight percent; mixing the mixture with a ball milling medium and ballstone; and ball milling, drying granulating, aging, pressing to form a film, sintering and cooling to obtain BaTiO3 / xCu. In the invention, the preparation process is simple and has the characteristics of low cost and no pollution.

Description

technical field [0001] The invention belongs to the field of materials, and relates to an electronic material and a preparation method thereof, in particular to a high dielectric constant composite material and a preparation method thereof. Background technique [0002] It has become increasingly difficult to prepare a single material to meet the requirements of today's high-tech development. At present, more and more materials are used to prepare high-performance composite materials. Metal-ceramic composite materials are widely used in various technical fields due to their high heat resistance, wear resistance, corrosion resistance and special electrical properties. [0003] As an excellent electronic ceramic matrix, pure BaTiO 3 Ferroelectric materials and perovskite-based materials are widely used in thermistors, capacitors, gate dielectric materials and information storage media. BaTiO can be achieved by doping 3 Charge balance, defect control, grain size adjustment a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622
Inventor 蒲永平许宁庄永勇王博陈凯吴海东
Owner YANCHENG LANBANG TECHN FIBER
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