Preparation method of copper-matrix aluminum oxide nano material

A nano-alumina and copper-based technology, which is applied in the field of copper-based composite material preparation, can solve the problems of long process flow, uneven distribution of alumina, and low performance of nanomaterials, achieving shortened process flow, low cost, and guaranteed uniformity Effect

Active Publication Date: 2021-09-24
CHINA ENFI ENGINEERING CORPORATION
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  • Claims
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Problems solved by technology

[0013] The purpose of the present invention is to provide a short process flow, economical and efficient preparation method of copper-based alumina nanomaterials, to solve the need to use nano-scale alumina particles in the prior art, aluminum oxide is unevenly distributed in the copper base, The performance of the prepared nanomaterials is not high, and the process is long

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  • Preparation method of copper-matrix aluminum oxide nano material
  • Preparation method of copper-matrix aluminum oxide nano material
  • Preparation method of copper-matrix aluminum oxide nano material

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[0036] figure 1 The process flow of the preparation method of copper-based alumina nanomaterials in the embodiment of the present invention is schematically shown. like figure 1 As shown, in an optional embodiment, a method for preparing a copper-based alumina nanomaterial provided by the present invention may include:

[0037] Step S1, to analyze pure Cu(NO 3 ) 2 ·3H 2 O(or Cu(NO 3 ) 2 ·6H 2 O) and Al(NO 3 ) 3 9H 2 O is the raw material, according to the Al in copper-based alumina nanopowder 2 o 3 The mass fraction is 0.1-5wt%, and the proportion of copper nitrate and aluminum nitrate is configured. Preferably according to Al 2 o 3 The copper-based aluminum oxide nanometer powder is configured with a mass fraction ranging from 0.7 to 1.5 wt%.

[0038] In the step of the present invention, analytically pure copper nitrate and aluminum nitrate are selected as raw materials and dissolved in water to ensure sufficient mutual solubility of the two raw materials. Ab...

Embodiment 1-3

[0053] Embodiment 1-3 is based on Cu(NO 3 ) 2 ·3H 2 O and Al(NO 3 ) 3 9H 2 O is raw material; Embodiment 4-6 is based on Cu(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O is the raw material. In the following examples 1-6, the detection standard of copper-based alumina nano-powder is: (1) Density measurement: GB / T5162-2006; (2) Conductivity: the powder is pressed into tablets, and measured by four-probe method Conductivity; (3) hardness: measured by nano-micromechanical probe; (4) powder particle size: electron microscope method, laser particle size analysis method, X-ray diffraction method, etc. can be used, and the powder in Examples 1-6 of the present invention The particle size was measured by electron microscopy.

Embodiment 1

[0055] According to the mass fraction of alumina in the copper-based alumina composite material being 1%, the copper nitrate solution and the aluminum nitrate solution are prepared. The mixed solution was prepared into precursor powder by using a spray dryer. The precursor powder was placed in a heatable and ventilated planetary ball mill, and ball milled for 10 h under the conditions of 600 ° C, ball mill speed 500 rpm, and hydrogen (1 L / min) to prepare copper-based alumina nanopowder. After testing, the main physical parameters of the copper-based alumina nanopowder are shown in Table 1.

[0056] Table 1 Physical parameters of copper-based alumina nanopowder

[0057] Relative density 98.3％ Conductivity 90.8%IACS hardness 113HB Powder particle size 28nm

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Abstract

The invention discloses a preparation method of a copper-matrix aluminum oxide nano material. The preparation method comprises the following steps of taking copper nitrate and aluminum nitrate as raw materials, quickly drying the raw materials to prepare precursor powder, and heating and ball-milling the precursor powder in a reducing atmosphere to prepare the copper-matrix aluminum oxide nano material. According to the method, the cost of the raw materials is lower, and nanoscale aluminum oxide particles do not need to be used as a strengthening phase; the precursor powder is prepared through quick drying so that the raw material mixing uniformity can be ensured; ball milling and reduction are combined, so that the problem of crystal particle growth caused by reduction after ball milling can be avoided; and the technological process is shortened, and the copper-matrix aluminum oxide nano material with more excellent performance can be economically and efficiently prepared.

Description

technical field [0001] The invention relates to the technical field of preparation of copper-based composite materials, in particular to a method for preparing copper-based alumina nanometer materials. Background technique [0002] Copper matrix composites (CMCs) is the addition of suitable reinforcements to the matrix of copper and its alloys, so that it can obtain properties that it does not have. For example, when copper is applied to the lead frame of an integrated circuit, its softening temperature is required to exceed 800K, its tensile strength exceeds 600MPa, and its conductivity must reach 5.2S / m, which is difficult to meet the requirements for a single copper or copper alloy. Traditional methods such as Adding alloying elements increases the strength of the material but sacrifices the thermal and electrical conductivity of copper. The emergence of CMCs has found a new balance point in the copper matrix for the two contradictory properties of high strength and high...

Claims

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Application Information

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IPC IPC(8): B22F9/22B22F1/00B22F9/04
CPCB22F9/22B22F9/04B22F2009/043
Inventor 苟海鹏陈学刚裴忠冶陈宋璇姚亮
Owner CHINA ENFI ENGINEERING CORPORATION
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