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A kind of low temperature sintering ceramic material and preparation method

A technology for low-temperature sintering ceramics and ceramic materials, which is applied in the field of low-temperature sintering ceramic materials and non-metallic heat-dissipating materials, can solve the problems of high manufacturing cost, low sintering temperature, and unsuitable market promotion.

Active Publication Date: 2018-11-30
GUANGDONG REAL FAITH LIGHTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, materials with higher thermal conductivity have stricter requirements on raw materials. In order to ensure their performance, their sintering temperature will be higher than 1000°C. For example, the molding temperature of alumina (96%) ceramics is above 1400°C, and the higher the temperature , the lower the sintering molding rate, the higher the manufacturing cost, which is not suitable for market promotion
At this stage, there is no ceramic material with low sintering temperature, low cost, high thermal conductivity and excellent performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The formula of the ceramic material is (parts by weight): 59 parts of kaolin; 31 parts of aluminum nitride aluminum oxide mixed material; 7 parts of silane coupling agent KH5607; 1.5 parts of titanium oxide; 0.5 parts of lanthanum oxide; 0.5 parts of yttrium oxide; 1 part oxalic acid. In this embodiment, each of lanthanum oxide and yttrium oxide accounts for 0.5 parts, and in other embodiments, only one of them may be added, and the addition amount is 0.5-1 part.

[0037] The preparation method of ceramic material is:

[0038] 1. Dilute the silane coupling agent KH560 with water to a solution with a mass fraction of 3%, then pass the kaolin powder through a 350-mesh sieve, add it to the diluted silane coupling agent KH560 solution for immersion treatment for 1 hour, and put it in a low-temperature microwave drying oven Calcined at 700°C for 2 hours, cooled to room temperature, and passed through a 350-mesh sieve by ultra-fine dry powder ball milling to make precursor-t...

Embodiment 2

[0045] The formula of the ceramic material is (parts by weight): 65 parts of kaolin; 19 parts of aluminum nitride aluminum oxide mixed material; 14 parts of silane coupling agent KH56014; 1.5 parts of titanium oxide; 0.5 parts of lanthanum oxide; 1 part of mica;

[0046] The preparation method of ceramic material is:

[0047] 1. Dilute the silane coupling agent KH560 with water to a solution with a mass fraction of 3%, then pass the kaolin powder through a 400-mesh sieve, add it to the diluted silane coupling agent KH560 solution for immersion treatment for 1 hour, and put it in a low-temperature microwave drying oven Calcined at 800°C for 2 hours, cooled to room temperature, and passed through a 400-mesh sieve by ultra-fine dry powder ball milling to obtain precursor-treated kaolin powder, which was sealed for future use.

[0048] 2. Pass the aluminum nitride alumina mixed material through a 400-mesh sieve, and dry it in a low-temperature nitrogen furnace at 160°C for 50 minu...

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Abstract

The invention relates to a low-temperature sintered ceramic material and a preparing method thereof. The ceramic material is prepared from, by weight, 55-68 parts of kaoline, 19-31 parts of an aluminum nitride and aluminum oxide mixed material, 7-17 parts of a silane coupling agent, 1.5 parts of titanium oxide, 1-3 parts of mica and 0.5 part of lanthanum oxide or yttrium oxide. Heat conductivity of a radiator can be improved by the microwave low-temperature sintered ceramic material, the excellent performance such as high rigidity, high abrasion resistance, the low expansion degree, low density, low cost, corrosion resistance, easy machining and forming and impact resistance of a radiating material product is improved, the problems that ceramics in the field of LEDs are poor in radiating performance and short in service life are solved, and meanwhile the extremely strong vitality is given to electronic technology industrialization.

Description

technical field [0001] The invention belongs to the field of LEDs and relates to the technical improvement of non-metal heat dissipation materials, in particular to a low-temperature sintered ceramic material. Background technique [0002] LED is a new type of solid-state light source, which has received great attention since it came out. Its luminescent mechanism relies on electrons in the PN junction to transition between energy bands to generate light energy. Under the action of an external electric field, the radiative recombination of electrons and holes undergoes electrogenic action, and part of the energy is converted into light energy, while the lattice oscillation generated by non-radiative recombination converts the rest of the energy into heat energy. At present, the luminous efficiency of LED is only 20%-30%, and most of the remaining energy is converted into heat energy. A large amount of heat energy needs to be dissipated in time, otherwise the life of LED wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/04C04B33/32
CPCC04B33/04C04B33/32C04B2235/3217C04B2235/3225C04B2235/3227C04B2235/3232C04B2235/3472C04B2235/3865C04B2235/606C04B2235/656
Inventor 程康丁天昊丁萍
Owner GUANGDONG REAL FAITH LIGHTING TECH
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