Novel aluminum nitride microsphere powder preparation method

An aluminum nitride and microsphere technology, applied in the field of aluminum nitride microsphere powder and its preparation, can solve the problems of unsuitable industrial production, high reaction temperature, expensive and complicated equipment, etc., and achieves low cost of raw materials and equipment, high heat treatment temperature Low effect and simple preparation steps

Inactive Publication Date: 2015-09-30
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the direct nitriding method of aluminum powder has low cost and simple process, but the product is incomplete nitriding and easy to agglomerate, and it is difficult to synthesize high-purity and fine-grained products; the synthetic product of alumina carbothermal reduction method has high purity and uniform particle size, but the reaction The temperature is high, the holding time is long, and carbon removal is required in the later stage; the self-propagating high-temperature synthesis method has a fast reaction speed, energy saving and environmental protection, and high activity of the product, but the reaction is difficult to control, the purity is not high, and the product is e...

Method used

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  • Novel aluminum nitride microsphere powder preparation method
  • Novel aluminum nitride microsphere powder preparation method
  • Novel aluminum nitride microsphere powder preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) According to the mass ratio of crystalline aluminum chloride: ethanol: deionized water: 1,2-propylene oxide = 1:1.15:1.06:1.54, weigh crystalline aluminum chloride, ethanol, deionized water and 1,2-cyclo Oxypropane;

[0021] 2) Under the condition of constant temperature water bath at 40°C, fully dissolve crystalline aluminum chloride in the mixed solution of deionized water and ethanol, then add 1,2-propylene oxide, stir for 10 seconds and then stand still to obtain a white gel;

[0022] 3) Dry the gel at a constant temperature of 60°C for 5 hours, then grind and disperse it, keep it in an ammonia atmosphere at 1200°C for 2 hours, and obtain AlN microsphere powder after cooling.

[0023] The scanning electron microscope photo of the AlN microsphere powder is shown in figure 1 , it can be seen from the figure that the AlN microspheres have the characteristics of regular shape and uniform size distribution. Its transmission electron microscope pictures are shown in ...

Embodiment 2

[0025] 1) According to the mass ratio of crystalline aluminum chloride: polyethylene oxide: ethanol: deionized water: formamide: 1,2-propylene oxide = 1: 0.02: 0.35: 1.45: 0.10: 1.45, weigh crystalline aluminum chloride, Polyethylene oxide, ethanol, deionized water, formamide and 1,2-propylene oxide;

[0026] 2) Under the condition of a constant temperature water bath at 40°C, fully dissolve crystalline aluminum chloride and polyethylene oxide in a mixed solution of deionized water, formamide and ethanol, then add 1,2-propylene oxide, stir for 10 seconds and then statically placed, a white gel was obtained;

[0027] 3) Dry the gel at a constant temperature of 70°C for 4 hours, then grind and disperse it, keep it at 1100°C for 5 hours under an ammonia atmosphere, and obtain AlN microsphere powder after cooling, with a microsphere diameter distribution of 0.6~3.2 μm, regular shape, uniform size distribution.

Embodiment 3

[0029] 1) According to the mass ratio of crystalline aluminum chloride: polyethylene glycol: ethanol: deionized water: formamide: 1,2-propylene oxide = 1: 0.1: 1.32: 0.88: 0.10: 0.77, weigh the crystalline aluminum chloride , polyethylene oxide, ethanol, deionized water, formamide and 1,2-propylene oxide;

[0030] 2) Under the condition of a constant temperature water bath at 40°C, fully dissolve crystalline aluminum chloride and polyethylene glycol in a mixed solution of deionized water, formamide and ethanol, then add 1,2-propylene oxide, and stir for 10 seconds Stand still, obtain white gel;

[0031] 3) Dry the gel at a constant temperature of 80°C for 3 hours, then grind and disperse it, keep it in an ammonia atmosphere at 1300°C for 3 hours, and obtain AlN microsphere powder after cooling, the diameter distribution of the microspheres is 0.8~2.8 μm, regular shape, uniform size distribution.

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Abstract

The present invention discloses aluminum nitride microsphere powder, which has a diameter of 20 nm-10 [mu]m. According to the preparation method, a metal inorganic salt is adopted as a precursor and a sol-gel method and a gas nitriding reducing method are combined to prepare the aluminum nitride microsphere powder at the low heat treatment temperature. According to the present invention, the method has characteristics of simple preparation process, simple operation, short preparation process period, low heat treatment temperature, substantial energy consumption reducing, low raw material cost and low equipment cost, and is suitable for industrial mass production; and the prepared ALN microspheres have characteristics of regular shape, adjustable particle size, uniform size distribution, good crystallinity, high purity and the like, can be used for producing circuit packaging materials, ultraviolet photoelectric detectors, pressure sensors, thermal radiation sensors, field effect transistors, light emitting diodes, transparent ceramics, nitride phosphor and the like, and is further the material with the excellent performances such as high temperature resistance, corrosion resistance and anti-oxidation property.

Description

technical field [0001] The invention relates to an aluminum nitride microsphere powder suitable for circuit packaging, sensors, semiconductor lighting, ceramic processing, anti-corrosion and wear-resistant technical fields and a preparation method thereof. Background technique [0002] Aluminum nitride (AlN) has excellent physical and chemical properties such as high thermal conductivity, high electrical insulation, high strength, high hardness, low thermal expansion coefficient, etc., and has excellent process properties such as easy processing, and has become the most promising new A generation of high thermal conductivity ceramic electronic substrates and packaging materials. AlN ceramic materials also have excellent optical properties and sound wave propagation properties, and can be used as the main material for optoelectronic components. As a high-performance dielectric ceramic, the thermal conductivity of AlN ceramics is slightly lower than that of SiC and BeO cerami...

Claims

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Application Information

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IPC IPC(8): C04B41/90
Inventor 樊先平万军乔旭升吴立昂吴一民
Owner ZHEJIANG UNIV
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