f-ca-lu doped aluminum nitride composite ceramic green body and its preparation process

A composite ceramic and preparation technology, which is applied in the field of aluminum nitride composite ceramics with high thermal conductivity, can solve the problem that the thickness of the ceramic substrate cannot meet the needs of electronic ceramics, and achieve the effect of good performance, stable quality and low sintering temperature of subsequent products

Active Publication Date: 2021-11-05
福建臻璟新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, in view of the current application requirements of ceramic substrates in the electronics industry, most aluminum nitride ceramic substrates are prepared by the first two methods, and the thickness of the prepared ceramic substrates cannot meet the needs of electronic ceramics, while tape casting is a large-scale preparation of substrate materials. An important process method, and can prepare thinner ceramic substrates

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0024] The preparation process of the F-Ca-Lu doped aluminum nitride composite ceramic green body of the present embodiment, the preparation process includes the following steps carried out in sequence:

[0025] (1) In the high-speed dispersant, add a mixed solution of 65mL of absolute ethanol, 20mL of propylene glycol ether and 40mL of isopropanol into the container, and gradually add a mixture of 1g of fluorocarbon resin and 2g of polyvinyl butyral, particle size A mixture of 1.2μm yttrium-containing aluminum nitride powder 125g, 2g calcium oxide and 1g lutetium oxide, 0.3g polyethylene glycol, keep the stirring speed at 1700±200r / min, after stirring for 30-270min, add the remaining 15mL without A mixture of water ethanol, 5mL propylene glycol ether and 5mL isopropanol, 0.12g polyolefin wax and 0.2g dimethyl phthalate, and then stir at high speed (1600±200r / min) for 35-300min to obtain a slurry;

[0026] (2) Transfer the slurry to a sand mill for sand grinding. The grinding ...

Embodiment approach 2

[0033] The preparation process of the F-Ca-Lu doped aluminum nitride composite ceramic green body of the present embodiment, the preparation process includes the following steps carried out in sequence:

[0034](1) In the high-speed dispersant, add a mixed solution of 80mL of absolute ethanol, 40mL of propylene glycol ether and 20mL of isopropanol into the container, and gradually add a mixture of 0.4g of fluorocarbon resin and 1.6g of polyvinyl butyral, 180g of aluminum nitride powder with a particle size of 1.2μm, a mixture of 3g of calcium oxide and 1g of lutetium oxide, and 0.39g of polyethylene glycol. Keep the stirring speed at 1700±200r / min. After stirring for 60min, add the remaining 20mL of absolute ethanol , a mixture of 10mL propylene glycol ether and 5mL isopropanol, 0.12g polyolefin wax and 0.2g dimethyl phthalate, and then stirred at high speed (1600±200r / min) for 150min to obtain a slurry;

[0035] (2) Transfer the slurry to a sand mill for sand grinding. The gr...

Embodiment approach 3

[0042] The preparation process of the F-Ca-Lu doped aluminum nitride composite ceramic green body of the present embodiment, the preparation process includes the following steps carried out in sequence:

[0043] (1) In the high-speed dispersant, add the mixed solution of 78mL of absolute ethanol, 24mL of propylene glycol ether and 48mL of isopropanol into the container, gradually add the mixture of 1g of fluorocarbon resin and 2g of polyvinyl butyral, the particle size 162g of 2μm aluminum nitride powder with an oxygen content of 1%, a mixture of 3g of calcium oxide and 0.6g of lutetium oxide, and 0.25g of polyethylene glycol. Keep the stirring speed at 1700±200r / min. After stirring for 120min, add the remaining 18mL of absolute ethanol, 6mL of propylene glycol ether and 6mL of isopropanol mixture, 0.45g of polyolefin wax and 0.2g of dimethyl phthalate, and then stirred at high speed (1600±200r / min) for 200min to obtain a slurry;

[0044] (2) Transfer the slurry to a sand mill...

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Abstract

The invention relates to a F-Ca-Lu-doped aluminum nitride composite ceramic green body with high thermal conductivity and a casting process thereof. The ceramic green body is prepared by a casting process, and organic solvents, binders, nitriding Aluminum powder, sintering aid, dispersant, anti-sedimentation agent, plasticizer and other raw materials are uniformly dispersed and stirred, and sand-milled to obtain casting slurry, and the slurry is subjected to vacuum defoaming, casting plate making, isostatic pressing and other processes The multi-phase ceramic green body with high flatness and small sintering shrinkage can be obtained through advanced processing, and at the same time meet the industrial needs of rapid, large-scale, and stable quality manufacturing of green bodies; the obtained aluminum nitride ceramic substrate is widely used in the field of integrated circuits, high-power devices and Optoelectronic engineering fields such as high-power LED lighting have broad application prospects.

Description

technical field [0001] The invention relates to the field of aluminum nitride composite ceramics with high thermal conductivity, in particular to an F-Ca-Lu doped aluminum nitride composite ceramic green body with high thermal conductivity and a casting process thereof. Background technique [0002] Aluminum nitride (AlN) ceramic substrate has excellent characteristics such as high thermal conductivity, high hardness, good electrical insulation, low dielectric constant and dielectric loss, thermal expansion coefficient matching with silicon, and non-toxicity. It is used in power electronics, electronic information and other fields have a wide range of application potential. [0003] At present, the synthesis processes of aluminum nitride powder that have become commercialized mainly include the direct nitriding method of aluminum powder and the carbon thermal reduction method of alumina. However, aluminum nitride is a covalent bond crystal, which is difficult to sinter, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/582C04B35/622
Inventor 林伟毅
Owner 福建臻璟新材料科技有限公司
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