Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Low-temperature composite high-heat-conductivity ceramic material and preparation method thereof

A technology of high thermal conductivity ceramics and ceramic materials, which is applied in the field of low-temperature composite high thermal conductivity ceramic materials and its preparation, can solve the problems of material uniformity limitation, lower material high temperature performance, high processing cost, etc., and achieve uniform, stable and compact physical and chemical properties As well as the effect of strength improvement and production cost reduction

Inactive Publication Date: 2016-05-11
GUANGDONG REAL FAITH LIGHTING TECH
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The preparation process of traditional ceramics generally adopts powder sintering method. The general process is: powder preparation-molding-sintering-processing. Although the preparation technology improvement technology emerges endlessly, it still has its own insurmountable limitations:
[0004] 1. The sintering temperature is high. Although the sintering temperature can be reduced by adding sintering aids, adding sintering aids will reduce the high temperature performance of the material;
[0005] 2. Material molding is difficult; ceramic molding technology cannot meet the manufacturing requirements of high-precision and complex parts;
[0006] 3. The material processing is relatively difficult, the strength of the green body is relatively low, and it cannot be finely processed, while the strength of the sintered body is very high, very hard, the processing cost is high, and processing is difficult;
[0007] 4. When preparing multi-phase materials, due to powder mixing, uniform distribution at the molecular level cannot be achieved, so that the uniformity of the material is limited, thereby affecting its high-temperature performance
[0018] The existing precursor technology is rarely used in the molding of ceramics in the LED field. Generally speaking, the cost of using the precursor is higher, and the production conditions are more demanding than traditional ceramics, and its application fields are limited.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Low-temperature composite high-heat-conductivity ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The composition of the ceramic material is: 60 parts of modified polysiloxane, 39 parts by weight of mixed powder of aluminum oxide and aluminum nitride, and 1 part of titanate coupling agent.

[0047] The mixed powder of alumina and aluminum nitride has a particle size of 1-3 μm and a purity of over 99%.

[0048] The titanate coupling agent is selected from isopropyl three (dioctyl pyrophosphoryl acyloxy), isopropyl trioleate acyloxy titanate, tetraisopropyl two (dioctyl phosphite acyloxy) oxy) titanate, etc. In this embodiment, isopropyl trioleate acyloxy titanate is selected.

[0049] Modified polysiloxane can be prepared by the following preparation method, but this method is only for example and not as a limitation of the present invention:

[0050] 1. Stir and mix the aromatic solvent, alkyl ester solvent and soft water, then add the chlorosilane mixture and titanate and keep stirring, and keep the temperature at room temperature.

[0051] 2. Washing after sepa...

Embodiment 2

[0062] The composition of the ceramic material is as follows in parts by weight: 60 parts of modified polysiloxane, 30 parts of mixed powder of alumina and aluminum nitride, 1 part of silane coupling agent, 1 part of titanium oxide, 1 part of silicon dioxide, 1 part of mica portion composition.

[0063] The mixed powder of alumina and aluminum nitride has a particle size of 1-3 μm and a purity of over 99%. Wherein the silane coupling agent is KH560. Titanium oxide, silicon dioxide, and mica are ceramic performance additives. The ceramic performance additives described in this embodiment can be one or more of the above-mentioned materials, and the particle size is controlled at the nanometer level, such as within 10 nanometers, and the purity is 99%. %above.

[0064] The preparation process of ceramic materials is as follows:

[0065] 1. Put the mixed powder of alumina and aluminum nitride into a low-temperature nitrogen-protected drying oven for drying at 170°C, keep it war...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Granularityaaaaaaaaaa
Densityaaaaaaaaaa
Thermal conductivityaaaaaaaaaa
Login to View More

Abstract

The invention provides a low-temperature composite high-heat-conductivity ceramic material which is composed of the following components in parts by weight: 60-70 parts of modified polysiloxane, 30-40 parts of aluminum oxide-aluminum nitride mixed powder and 1-3 parts of coupling agent. The molecular formula of the modified polysiloxane is [RnSiO[4-n / 2]]n, wherein R is the modified part which is a titanium-containing group or phenyl group. The invention also provides a preparation method of the low-temperature composite high-heat-conductivity ceramic material, which comprises the following steps: mixing all the raw materials together, grinding, sintering, and carrying out dry-process powder ball milling to obtain the required ceramic material. The ceramic material has the advantages of high heat conductivity coefficient, high / low-temperature resistance, chemical corrosion resistance, high formability, simple technique, high production efficiency and the like.

Description

technical field [0001] The invention belongs to the field of high molecular polymer materials, and in particular relates to a low-temperature composite high-thermal conductivity ceramic material and a preparation method thereof. Background technique [0002] In the fields of high-temperature structures such as machinery, aerospace, energy and military, commonly used metal materials and metal alloy materials are difficult to meet the requirements in terms of operating temperature and density, so people have to seek new materials to replace them. In order to replace the current materials, the new materials must have the following properties: light weight, good thermal stability, high fracture toughness, high fracture strength, good oxidation resistance, good thermal shock resistance, etc. Ceramic materials have high strength, high modulus, and good oxidation resistance and corrosion resistance. Compared with metal and alloy materials, ceramic materials have lower density and b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B35/14C04B35/622C04B35/626
CPCC04B35/14C04B35/622C04B35/6261C04B35/62655C04B2235/3217C04B2235/3232C04B2235/3244C04B2235/3418C04B2235/3463C04B2235/3865C04B2235/483C04B2235/5436C04B2235/77C04B2235/9607
Inventor 程康丁天昊丁萍
Owner GUANGDONG REAL FAITH LIGHTING TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products