Aluminum oxide ceramic substrate with high heat conductivity and preparation method thereof

An alumina ceramic, high thermal conductivity technology, applied in the field of ceramic materials, can solve the problems of large one-time investment, non-compliance with energy saving and emission reduction, high operation and maintenance costs, and achieve consistent shrinkage rate, consistent thickness, and stable physical properties. Effect

Inactive Publication Date: 2013-11-27
NANJING ZHONGJIANG NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All these treatment devices require a large one-time investment, and the operation and maintenance costs are also very high, which do not meet the requirements of energy saving and emission reduction

Method used

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  • Aluminum oxide ceramic substrate with high heat conductivity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Weigh 200g of ceramic powder with an electronic balance, of which alumina powder accounts for 96%, additives 4%, of which 2g silicon dioxide, 1.5g magnesium oxide, 1.5g titanium dioxide, 2g zirconium dioxide and 1g yttrium oxide The PVB powder that weighs 14g; The butanol that weighs 60g, weighs 30g Virahol, weighs 30g butyl acetate; The DBP that weighs 12g; 30g triolein;

[0026] (2) Put the three solvents of butanol, isopropanol and butyl acetate that have been weighed into the ball mill tank;

[0027] (3) Add the weighed ceramic powder into the solvent, then add an appropriate amount of zirconia balls, put them into a ball mill for ball milling, and mill at room temperature for 24 hours;

[0028] (4) In the ball mill tank, put the weighed DBP and PVB powders into the mixed powder, then put them back in the ball mill, and ball mill at room temperature for 36 hours;

[0029] (5) Stir and degas the ball-milled raw porcelain slurry for 40 minutes in a low vacuum env...

Embodiment 2

[0037] The steps of this example are exactly the same as Example 1, the difference is that in step (1), 200g of ceramic powder is weighed with an electronic balance, wherein alumina powder accounts for 96%, auxiliary agent 4%, wherein 2g of silicon dioxide, 1.5g magnesia, 1.5g titanium dioxide, 2g zirconia and 1g yttrium oxide; weigh 8g of PVB powder; weigh 50g of butanol, weigh 15g of isopropanol, weigh 15g of butyl acetate; weigh 4g of DBP; weigh 4g of triolein; the ball milling time in step (3) is 12h; the ball milling time in step (4) is 40h, the degassing time in step (5) is 30min, and the gel removal temperature in step (10) is 400°C, and the heating rate is 40°C / h; in step (11), the sintering temperature is 1450°C, the sintering time is 2h, and the heating rate is 400°C / h. The resulting substrate density is 3.80 g / cm 3 , the bending strength can reach 322 MPa, the thermal conductivity is 25.4W / m K, the dielectric constant is 9.68 at 10GHz, and the dielectric loss tang...

Embodiment 3

[0039] The steps of this example are exactly the same as Example 1, the difference is that: (1) weigh 200g of ceramic powder with an electronic balance, of which alumina powder accounts for 96%, additives 4%, of which 2g of silicon dioxide, 1.5 g magnesia, 1.5 g titania, 2 g zirconia and 1 g yttrium oxide; weigh 30 g of PVB powder; weigh 80 g of butanol, weigh 160 g of isopropanol, weigh 160 g of butyl acetate; weigh 26 g of DBP ; Weigh the triolein of 8g. The ball milling time in step (3) is 6 hours; the ball milling time in step (4) is 48 hours, the degassing time in step (5) is 60 minutes, the debinding temperature in step (10) is 600°C, and the heating rate is 80°C / h; In step (11), the sintering temperature is 1550°C, the sintering time is 0.5h, and the heating rate is 900°C / h. The resulting substrate density was 3.84 g / cm 3 , the bending strength can reach 351 MPa, the thermal conductivity is 26.7W / m K, the dielectric constant is 9.95 at 10GHz, and the dielectric loss ...

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Abstract

The invention discloses an aluminum oxide ceramic substrate with high heat conductivity. The aluminum oxide ceramic substrate is prepared by steps of stirring a ceramic powder material, a binder, a plasticizer, a dispersant and a solvent uniformly, preparing a ceramic raw-ceramic substrate through a tape casting method, glue discharging and sintering. The aluminum oxide ceramic substrate is characterized in that the solvent is a mixture of butanol, isopropanol and butyl acetate, and the ceramic powder material comprises aluminium oxide powder and auxiliary agents. The invention also discloses a preparation method for the aluminum oxide ceramic substrate with the high heat conductivity. According to the aluminum oxide ceramic substrate and the preparation method, the solvent system which comprises the butanol, the isopropanol and the butyl acetate are used as the main solvent in place of traditional toluene, thus enhancing dissolution of PVB by the solvent, thereby guaranteeing uniformity of raw ceramic slurry, making physical properties of sintered ceramic stable, reducing environmental influences of the exhausted gas during production processes compared to traditional modes of production, contributing to energy conservation and emission reduction, and reducing the cost.

Description

technical field [0001] The invention relates to a high thermal conductivity alumina ceramic substrate and a preparation method thereof, belonging to the technical field of ceramic materials. Background technique [0002] Alumina ceramic materials have the advantages of high strength, superior insulation and chemical stability, and good power-saving performance, and are widely used in electronics, machinery, chemical industry, aerospace and other fields. In recent years, with the rapid development of microelectronics technology, especially hybrid integrated circuit (HIC) and multi-chip module (MCM) technology, the wide application of alumina ceramic substrates has attracted increasing attention. Alumina ceramics are divided into high-purity type and ordinary type. High-purity alumina ceramic system Al 2 o 3 Ceramic materials with a content of more than 99.9%, because their sintering temperature is as high as 1650-1990°C and the transmission wavelength is 1-6 μm, generally ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622
Inventor 尚文锦严文强方立鹤赵建光黄列武黄礼侃赵耀丽
Owner NANJING ZHONGJIANG NEW MATERIAL TECH
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