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A kind of continuous preparation method and equipment of aluminum nitride powder

A technology of aluminum nitride powder and alumina, applied in chemical instruments and methods, nitrogen compounds, inorganic chemistry, etc., to achieve the effects of small footprint, prolong life, and ensure uniformity and consistency of thickness

Inactive Publication Date: 2016-08-17
NINGXIA AISENDA NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the defects of the existing carbothermal reduction method for producing aluminum nitride powder, and provide a continuous preparation method and equipment for aluminum nitride powder with continuous feeding and continuous reaction

Method used

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  • A kind of continuous preparation method and equipment of aluminum nitride powder
  • A kind of continuous preparation method and equipment of aluminum nitride powder
  • A kind of continuous preparation method and equipment of aluminum nitride powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] like figure 1 , 2 The continuous production equipment for the production of aluminum nitride powder shown in , 3 is equipped with a heating device and an annular track 9 on the furnace bottom 10 of the annular closed furnace body 1 of the rotary hearth type annular graphite resistance furnace, and a material is installed on the annular track. The boat 2, the material boat is driven by the power unit 8 to move on the circular track. In the annular closed furnace body of the rotary bottom-type annular graphite resistance furnace, it is divided into reduction nitriding area I and carbon removal area II. The arc angle of the reduction nitriding area is greater than or equal to 180°, and the arc angle of the carbon removal area is less than It is equal to 90°. A silo 4 and a suction collector 5 are installed on the annular closed furnace body between the reduction nitriding area and the carbon removal area. A vibration or screw feeding device is installed on the outlet of t...

Embodiment 2

[0032] On the basis of Example 1, aluminum nitride seeds are added to the mixed abrasive, the amount of which is about 1% of the total weight of the raw materials composed of aluminum oxide and carbon black, and the atmosphere of the mixed abrasive is kept under the protection of nitrogen. Carry out, wherein the purity of alumina and carbon black is more than 99.9%, other technical parameters remain unchanged.

Embodiment 3

[0034] According to the user's requirements for aluminum nitride powder, yttrium oxide is added in the raw material mixing step. The amount of yttrium oxide added is 3.5% of the total weight of the raw material composed of aluminum oxide and carbon black. The purity of the added yttrium oxide is 99.9%, and the rest The technical parameters remain unchanged.

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Abstract

The invention relates to a preparation method and equipment of aluminum nitride powder, in particular to a continuous preparation method and equipment of aluminum nitride powder. The process steps of the method are: mixing of raw materials, carbothermal reduction, and collection of reacted materials . Continuous production equipment for producing aluminum nitride powder, including a rotary bottom annular graphite resistance furnace and a heating device, a material boat is installed in the annular closed furnace body of the rotary bottom annular graphite resistance furnace, which is characterized in that the rotary bottom annular graphite resistance furnace The annular closed furnace body is divided into a reduction nitriding area and a carbon removal area. A silo and a suction collector are installed on the annular closed furnace body between the reduction nitriding area and the carbon removal area. A nitrogen inlet and an air inlet are installed on the annular closed furnace body in the zone. The technical solution of the present invention adopts ring-shaped and partitioned continuous production techniques and equipment, which can effectively reduce production costs and time, and effectively guarantee the quality of the produced aluminum nitride powder products.

Description

Technical field [0001] The invention relates to a preparation method and equipment for aluminum nitride powder, in particular to a continuous preparation method and equipment for aluminum nitride powder. Background technique [0002] Aluminum nitride ceramics (AIN ceramics) have become ideal packaging and substrate materials for electronic components due to their excellent comprehensive properties such as high thermal conductivity, low thermal expansion coefficient, high strength, high corrosion resistance, insulation, and low permittivity, and their application prospects are very broad. . Other applications of aluminum nitride ceramics include cutting tools, microwave substrates, hybrid power switch substrates, heating tanks, laser dipoles, heating diffusers, polymer and glass additives, etc. In addition, aluminum nitride ceramics have excellent resistance to molten metal erosion, and are ideal crucible materials for melting and casting pure iron, aluminum and aluminum all...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/072C04B35/581C04B35/626
Inventor 李大海彭建勋李清华陈一中李钰
Owner NINGXIA AISENDA NEW MATERIALS TECH
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