Adhesive agent for injection molding of aluminum nitride ceramic and application method of adhesive agent

A technology of aluminum nitride ceramics and injection molding, which is applied in the field of binders for aluminum nitride ceramics injection molding, can solve the problems of high cost, difficult to prepare, small size, complex shape, etc., and achieve good toughness, high strength, and reduce defects. Effect

Active Publication Date: 2015-08-26
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the inherent brittleness of ceramic materials and the high hardness of some special ceramic materials, if the traditional powder metallurgy process is used, that is, the method of pressing the powder first and then machining, the cost is high an...

Method used

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  • Adhesive agent for injection molding of aluminum nitride ceramic and application method of adhesive agent
  • Adhesive agent for injection molding of aluminum nitride ceramic and application method of adhesive agent
  • Adhesive agent for injection molding of aluminum nitride ceramic and application method of adhesive agent

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A binder for injection molding of aluminum nitride ceramics of the present invention, the binder composition is as follows:

[0022]

[0023] The specific process steps of the binder for injection molding of aluminum nitride ceramics and the injection molding process of aluminum nitride of this embodiment are as follows:

[0024] (1) Feed material preparation: first, 1000 g of aluminum nitride powder (oxygen content 0.65%) and 30 g of sintering aid yttrium oxide were ball milled and mixed in alcohol, and then dried to obtain a mixed powder. Put it, 192g of binder and mixed powder of the above ingredients into a kneader for kneading, the kneading temperature is 170°C, and the rotation speed is 30r / min. After the mixture is in a molten state, continue kneading for 1h, and take it out after cooling. feeding.

[0025] (2) Injection molding: After crushing the feed material, it is formed by an injection molding machine at an injection temperature of 160° C. to obtain an ...

Embodiment 2

[0031] A binder for injection molding of aluminum nitride ceramics of the present invention, the binder composition is as follows:

[0032]

[0033] The specific process steps of the binder for injection molding of aluminum nitride ceramics and the injection molding process of aluminum nitride of this embodiment are as follows:

[0034] (1) Feed material preparation: first, 1000 g of aluminum nitride powder (with an oxygen content of 0.65%) and 30 g of sintering aid yttrium oxide were ball milled and mixed in alcohol, and then dried to obtain a mixed powder. Put it, 192g of the binder of the above ingredients, and the mixed powder into the internal mixer for mixing. The mixing temperature is 170°C and the rotation speed is 30r / min. After the mixture is in a molten state, continue mixing for 2 hours, and then cool Then remove the feed.

[0035] (2) Injection molding: After crushing the feed material, it is formed by an injection molding machine at an injection temperature o...

Embodiment 3

[0041] A binder for injection molding of aluminum nitride ceramics of the present invention, the binder composition is as follows:

[0042]

[0043]

[0044] The specific process steps of the binder for injection molding of aluminum nitride ceramics and the injection molding process of aluminum nitride of this embodiment are as follows:

[0045] (2) Feed material preparation: first, 1000 g (0.65%) of aluminum nitride powder and 30 g of sintering aid yttrium oxide were ball milled and mixed in alcohol, and then dried to obtain a mixed powder. Put it, 192g of the binder and the mixed powder of the above ingredients into a kneader for kneading, the kneading temperature is 170°C, and the rotation speed is 30r / min. After the mixture is in a molten state, continue kneading for 1h, and then cool Remove feed.

[0046] (3) Injection molding: After crushing the feed material, it is formed by an injection molding machine at an injection temperature of 160° C. to obtain an aluminum...

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Abstract

The invention belongs to the technical field of ceramic material preparation and discloses an adhesive agent for injection molding of aluminum nitride ceramic and an application method of the adhesive agent. The adhesive agent comprises the following ingredients: 50-70% of microcrystalline wax, 25-40% of high polymer, 3-10% of surface modifier and 2-12% of resin. The application method of the adhesive agent comprises the following steps of mixing aluminum nitride powder and the adhesive agent, putting in a mixing mill for heating and mixing to prepare a feed, carrying out the injection molding to prepare a green body, preparing a degreased blank after degreasing, carrying out high-temperature sintering at last to form a finish product. In a sintering process, heat preservation is carried out at a specific temperature point to achieve carbon thermal reduction to further reduce an oxygen content, and then the temperature is raised to the maximum temperature for sintering and compacting. The adhesive agent has excellent liquidity and shape preserving property, and a specific carbon residue rate after thermal degreasing, and the aluminum nitride ceramic prepared by the adhesive agent has upper heat conductivity.

Description

technical field [0001] The invention belongs to the technical field of ceramic material preparation, and relates to a binder used for injection molding of aluminum nitride ceramics and an application method thereof. technical background [0002] Aluminum nitride ceramics have good thermal conductivity, linear expansion coefficient close to that of silicon, high volume resistivity, low dielectric constant and dielectric loss. With excellent mechanical properties and other characteristics, it has very broad application prospects in the fields of electronics and energy. However, the degree of commercialization of AlN ceramics is not high, and the key factors restricting its development are high preparation costs and difficulty in forming complex ceramic parts. [0003] Powder injection molding is a near-net-shaping technology developed by combining traditional powder metallurgy and modern plastic injection molding technology. The biggest feature of this technology is that it c...

Claims

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Application Information

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IPC IPC(8): C04B35/634C04B35/581
Inventor 秦明礼鲁慧峰章林贾宝瑞何庆吴昊阳曲选辉
Owner UNIV OF SCI & TECH BEIJING
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