Preparation method for high-dielectric high temperature-resistant microwave dielectric composite material

A technology of microwave media and composite materials, which is applied in the field of composite material manufacturing, can solve the problems of low solid phase content of ceramics, achieve the effects of simple and environmentally friendly preparation process, reduce thermal expansion coefficient, and improve thermal conductivity

Inactive Publication Date: 2015-08-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention solves the technical problem of low ceramic solid phase content in traditional preparation methods, and provides a preparation method of high-dielectric and high-temperature-resistant microwave dielectric composite materials

Method used

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  • Preparation method for high-dielectric high temperature-resistant microwave dielectric composite material

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specific Embodiment approach 1

[0019] Specific implementation mode 1: In this implementation mode, a method for preparing a high-dielectric and high-temperature-resistant microwave dielectric composite material is specifically carried out according to the following steps:

[0020] 1. Put the ceramic filler into the ethanol solution, add a silane coupling agent, adjust the pH to 8-10, stir it ultrasonically, put it in a water bath at a temperature of 50-60°C, keep it for 6-8 hours, and then perform centrifugal drying. Obtain ceramic powder;

[0021] 2. Dry the ceramic powder obtained in step 1 at 80°C for 24 hours, then mix it with resin powder, then add deionized water, mix evenly, then add zirconia ceramic balls and mix for 24 hours, put the mixed slurry Put it into an oven, control the temperature at 80°C for drying, and obtain a mixed powder of ceramics and resin;

[0022] 3. Put the mixed powder obtained in step 2 into a mold, carry out molding, then cool down naturally, demold and take out the pressed...

specific Embodiment approach 2

[0023] Embodiment 2: This embodiment differs from Embodiment 1 in that the mass ratio of the ceramic filler to the ethanol solution in step 1 is 1:1, and the volume ratio of ethanol to deionized water in the ethanol solution is 1:1. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Embodiment 3: This embodiment is different from Embodiment 1 in that the mass ratio of the ceramic filler to the silane coupling agent in step 1 is 1: (1.5%-5%). Others are the same as in the first embodiment.

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Abstract

The invention relates to a microwave dielectric material and provides a preparation method for a high-dielectric high temperature-resistant microwave dielectric composite material, which belongs to the field of manufacturing technology for composite materials. The objective of the invention is to overcome the technical problem of low ceramic solid phase content in traditional preparation methods. The preparation method comprises the following steps: 1, surface modification of a ceramic filling material in virtue of a silane coupling agent; 2, mixing of ceramic powder with resin powder; and 3, compression molding. The composite material prepared in the invention has the characteristics of a high dielectric constant, low loss, high temperature resistance, high thermal conductivity, a small thermal expansion coefficient, simplicity and environmental protection. The preparation method provided by the invention is used for preparation of the high-dielectric high temperature-resistant microwave dielectric composite material.

Description

technical field [0001] The invention relates to the technical scope of composite material manufacturing, and relates to a microwave dielectric material. Background technique [0002] With the rapid development of modern electronic technology, more and more applications have put forward higher requirements for the dielectric properties of electronic materials and the miniaturization of electronic components. Dielectric materials with high mechanical properties and processability make the importance of high dielectric constant materials increasingly significant. Ceramic / polymer microwave dielectric composite materials are compatible with the high dielectric properties of ceramic particles and the excellent mechanical properties and insulation properties of polymers. It is one of the main research directions in the field of dielectric materials. Combining ceramic powder and polymer It is a promising method to prepare composite materials with high dielectric constant and easy p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/10
Inventor 叶枫马杰张标高晔刘强
Owner HARBIN INST OF TECH
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