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Hydrolysis resistant aluminum nitride powder, and preparation method and application thereof

An aluminum nitride and hydrolysis-resistant technology, applied in the field of colloid chemistry, can solve the problems of increasing oxygen content and affecting the fluidity of water-based aluminum nitride slurry, and achieves no reduction in thermal conductivity, significant industrial application value, and scope of application. wide effect

Inactive Publication Date: 2016-05-11
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above methods can improve the water resistance of aluminum nitride powder, there are also certain defects, such as: when using phosphoric acid or silane to treat aluminum nitride powder, phosphorus and silicon impurities will inevitably be introduced; and heat treatment will lead to Significant increase in oxygen content; organic acid treatment affects fluidity of water-based aluminum nitride slurries

Method used

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  • Hydrolysis resistant aluminum nitride powder, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0027] Add 150g of aluminum nitride powder and 100mL of ethanol into a ball mill jar, and mill for 10 minutes to obtain aluminum nitride slurry; take 1.5g of single-component polyurethane (water-based polyurethane grouting solution, purchased from Shanghai Jiankuo Industrial Co., Ltd.) Add it to the aluminum nitride slurry and continue ball milling for 1 hour to obtain a mixed slurry; pour the mixed slurry into a tray and dry it directly at 70°C for at least 12 hours to obtain a hydrolysis-resistant aluminum nitride powder.

Embodiment 2

[0029] Add 150g of aluminum nitride powder and 100mL of ethanol into the ball milling tank, and mill for 10 minutes to obtain aluminum nitride slurry; take 1g of two-component polyurethane isocyanate component (MDI) and add it to the aluminum nitride slurry, continue Ball mill for 1 hour, then pour the aluminum nitride slurry into a beaker, add 0.5 g of a two-component polyurethane curing agent component (polyether 204, hydroxyl value 265-300 mgKOH / g) while stirring, and continue stirring for 1 hour. hours to obtain a mixed slurry; pour the mixed slurry into a tray and directly dry at 70°C for at least 12 hours to obtain a hydrolysis-resistant aluminum nitride powder.

Embodiment 3

[0031] Add 150 g of aluminum nitride powder and 100 mL of ethanol into a ball milling tank, and mill for 10 minutes to obtain aluminum nitride slurry; take polyol-modified single-component polyurethane (purchased from Shanghai Crane City Polymer Technology Co., Ltd.) 1.5 g was added to the aluminum nitride slurry, and ball milling was continued for 1 hour to obtain a mixed slurry; the mixed slurry was poured into a tray and dried directly at 70°C to obtain a hydrolysis-resistant aluminum nitride powder. Disperse the aluminum nitride powder obtained in this example in water at a mass fraction of 10%, test and record the pH value of the suspension every 20 minutes, stir continuously during the test, and at the same time use the Ordinary aluminum nitride powder is used as a comparative test, and the pH value and time are plotted to obtain figure 1 The aluminum nitride hydrolysis process curve shown by figure 1 It can be seen that the aluminum nitride powder without polyurethane ...

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Abstract

The invention discloses a hydrolysis resistant aluminum nitride powder, and a preparation method and an application thereof. The hydrolysis resistant aluminum nitride powder is formed through carrying out surface wrapping on an aluminum nitride powder particle by polyurethane, and the polyurethane content is 0.1-10wt%. The preparation method of the powder comprises the following steps: preparing an aluminum nitride slurry, adding polyurethane to prepare a mixed slurry, and drying the mixed slurry to obtain the powder. Experiments prove that the aluminum nitride powder has good hydrolysis resistance, can be used in water-based and non-water-based molding preparation of aluminum nitride ceramics, and makes aluminum nitride ceramic blanks have excellent hydrolysis resistance, and the thermal conductivity of the blanks does not reduce after the blanks are sintered. A polyurethane wrapping layer can be completely removed through calcining, so no other impurities are introduced, and the physical and chemical performances of aluminum nitride are not influenced. The hydrolysis resistant aluminum nitride powder has the advantages of simple process, easy industrialization, wide application range and substantial industrial application values.

Description

technical field [0001] The invention relates to a hydrolysis-resistant aluminum nitride powder and its preparation method and application, belonging to the technical field of colloid chemistry. Background technique [0002] Aluminum nitride ceramic is a new type of high thermal conductivity material developed in the past two decades, with a theoretical thermal conductivity as high as 320Wm·K -1 , the actual thermal conductivity is 180~200Wm·K -1 . Aluminum nitride ceramic materials with high thermal conductivity have the advantages of simple preparation process and low sintering temperature. They also have the characteristics of high hardness, low expansion rate, good dielectric properties and chemical stability, high mechanical strength and low dielectric loss. Excellent heat dissipation performance and high electrical insulation performance have played an important role in reducing heat dissipation and power loss in high-frequency and high-efficiency integrated circuits,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/634C04B35/581
Inventor 董满江薛剑峰
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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