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Method for preparing dispersion-strengthened copper with high strength and high conductivity

A technology of dispersion strengthening copper and high conductivity, applied in the field of powder metallurgy, can solve the problems of long production cycle, high cost of raw materials, difficult to control, etc., and achieve the effects of high production efficiency, high mechanical properties, and short time.

Active Publication Date: 2012-07-11
天钛隆(天津)金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide an industrialized preparation method for obtaining dispersion-strengthened copper with nano-oxides with fine dispersion phase particles, uniform size and optimal distribution state, which has simple process, controllable process, low cost, high strength and high conductivity, and solves the problem of Existing methods have disadvantages such as high cost, difficult control, and long production cycle, and realize low-cost, high-efficiency, and environmentally friendly large-scale production of high-strength, high-conductivity dispersion-strengthened copper
Therefore, using such rich and cheap copper-containing etching waste liquid as raw material to prepare oxide dispersion strengthened copper solves the problem of high raw material cost

Method used

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  • Method for preparing dispersion-strengthened copper with high strength and high conductivity
  • Method for preparing dispersion-strengthened copper with high strength and high conductivity
  • Method for preparing dispersion-strengthened copper with high strength and high conductivity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: 0.1 wt% Al 2 o 3 Dispersion strengthened copper

[0033] 1. Cu(OH) 2 / Al(OH) 3 Preparation of composite powder: according to Al 2 o 3 The mass fraction of dispersion-strengthened copper is 0.1%, and Al(NO 3 ) 3 Mix and dissolve, then feed into the co-precipitation reactor at the same time with NaOH solution, and control the pH value of the solution to produce Cu(OH) 2 / Al(OH) 3 Precipitation, the precipitated material is filtered, washed and dried to obtain Cu(OH) 2 / Al(OH) 3 Composite powder.

[0034] 2. Calcination: Cu(OH) 2 / Al(OH) 3 The composite powder was placed in a calcination furnace with a calcination temperature of 300 °C and a calcination time of 2 h to obtain CuO / Al 2 o 3 Composite powder.

[0035] 3. Selective reduction: CuO / Al 2 o 3 The composite powder was reduced in a hydrogen protective atmosphere at a reduction temperature of 400 °C and a reduction time of 2 h to obtain Al 2 o 3 Nano-Al with extremely fine particles and un...

Embodiment 2

[0037] Example 2: 1.0 wt% Y 2 o 3 Dispersion strengthened copper

[0038] 1. Cu(OH) 2 / Y(OH) 3 Preparation of composite powder: according to Y 2 o 3 The mass fraction of dispersion-strengthened copper is 1.0%, the alkaline etching waste solution (copper content is 153 g / L), YCl 3 ·6H 2 O, hydrochloric acid is fed into the co-precipitation reactor at the same time, and the pH value of the solution is controlled to produce Cu(OH) 2 / Y(OH) 3 Precipitation, the precipitated material is filtered, washed and dried to obtain Cu(OH) 2 / Y(OH) 3 Composite powder.

[0039] 2. Calcination: Cu(OH) 2 / Y(OH) 3 The composite powder was placed in a calcination furnace with a calcination temperature of 400 °C and a calcination time of 1 h to obtain CuO / Y 2 o 3 Composite powder.

[0040] 3. Selective reduction: CuO / Y 2 o 3 The composite powder was reduced in a hydrogen protective atmosphere at a reduction temperature of 600 °C and a reduction time of 1.5 h to obtain Y 2 o 3 Na...

Embodiment 3

[0042] Example 3: 2.0 wt% ZrO 2 Dispersion strengthened copper

[0043] 1. Cu(OH) 2 / Zr(OH) 4 Preparation of composite powder: according to ZrO 2 The mass fraction of dispersion-strengthened copper is 2.0%, and ZrCl is added to the acidic etching waste solution (copper content is 176 g / L) 4 Mix and dissolve, and then enter the co-precipitation reactor at the same time as the alkaline etching waste solution (copper content is 172 g / L), and control the pH value of the solution to produce Cu(OH) 2 / Zr(OH) 4 Precipitation, the precipitated material is filtered, washed and dried to obtain Cu(OH) 2 / Zr(OH) 4 Composite powder.

[0044] 2. Calcination: Cu(OH) 2 / Zr(OH) 4 The composite powder was placed in a calcination furnace with a calcination temperature of 500 °C and a calcination time of 1.5 h to obtain CuO / ZrO 2 Composite powder.

[0045] 3. Selective reduction: CuO / ZrO 2 The composite powder was reduced in a hydrogen protective atmosphere at a reduction temperature ...

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Abstract

The invention provides a method for preparing dispersion-strengthened copper with high strength and high conductivity and belongs to the technical field of an oxide dispersion-strengthened material. The method comprises the following steps of: taking an electronic circuit board containing copper etching effluent (HW22) as a raw material; adding a soluble salt corresponding to a dispersion phase (one, two or more of Al2O3, Y2O3, MgO2, ZrO2 and ThO2); preparing Cu(OH)2 / X(OH)n compound powder according to a chemical neutralizing sediment technology; and performing roasting, selective reduction and compacting technology, thereby obtaining the nanometer oxide dispersion-strengthened copper. The prepared nanometer oxide dispersion-strengthened copper has high strength, high conductivity and excellent high-temperature softening resistance, wherein the tensile strength at room temperature is above 600MPa, the electric conductivity is more than 80% of IACS (International Annealed Copper Standard), and the softening temperature is above 700 DEG C. The method provided by the invention has the advantages of simple process, short flow, low energy consumption, rich and easily obtained raw material and low cost, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy and belongs to the category of oxide dispersion strengthening materials. In particular, it provides a low-cost large-scale industrial preparation of Cu(OH) by using electronic circuit board etching waste solution (HW22) 2 / X(OH) n Composite powder, a production process for preparing high-strength and high-conductivity copper-based oxide dispersion-reinforced materials through calcination, reduction, and densification processes. Background technique [0002] Dispersion-strengthened copper is a new type of structural functional material with excellent comprehensive properties. It has both high strength and high conductivity and good high temperature softening resistance. It is considered to be a new type of functional material with great development potential and application prospects. of great importance. As the name implies, the strengthening phase particles of oxide dispersion-stren...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C9/00B22F1/054
CPCC22C9/00C22F1/08C22B5/12C22C1/05C22C32/0021B22F1/0018C22C1/02B22F8/00B22F9/22B22F9/30B22F2003/208B22F2998/10B22F2999/00Y02W30/50B22F1/054B22F3/02B22F3/10B22F2201/013B22F2201/20B22F3/20
Inventor 郝俊杰郭志猛陈存广郭雷辰杨薇薇
Owner 天钛隆(天津)金属材料有限公司
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