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Preparation method of monocrystalline copper strips

A copper strip and single crystal technology, applied in the field of single crystal copper, can solve the problems such as the production and use of single crystal copper strip, and achieve the effect of avoiding single crystal to polycrystalline transformation, continuous production, and controllable thickness range.

Inactive Publication Date: 2014-01-22
XINGHUA PRECISION CASTING & FORGING IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, there are no reports on the production and use of single crystal copper strips

Method used

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  • Preparation method of monocrystalline copper strips

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This embodiment specifically implements a method for preparing a single crystal copper strip. Under the protection of a mixed gas of argon and hydrogen containing 1.0% hydrogen by volume, the polycrystalline copper strip with a thickness of 0.005mm and a width of 100mm obtained by cold rolling The copper strip is continuously fed into a closed holding furnace with a temperature of 1000°C. The polycrystalline copper strip enters the holding furnace with an effective heating length of 100cm at a speed of 5mm / min. Starting from the position of the ultrasonic horn, through three ultrasonic horns with a distance of 10 mm, under the protection of inert gas, ultrasonic action is performed on the continuously moving polycrystalline copper strip. The temperature of the polycrystalline copper strip is controlled at 900°C, the ultrasonic vibration frequency is 20kHz, and the power is 200W / mm 2 ; Next, continue to keep warm at 1000 ° C for 100 min under the protection of inert gas,...

Embodiment 2

[0020] This embodiment specifically implements a method for preparing a single crystal copper strip. Under the protection of a mixed gas of argon and hydrogen containing 0.8% hydrogen by volume, the polycrystalline copper strip with a thickness of 0.010mm and a width of 300mm obtained by cold rolling The copper strip is continuously fed into a closed holding furnace with a temperature of 1020°C; the polycrystalline copper strip enters a holding furnace with an effective heating length of 100cm at a speed of 10mm / min, and is kept in the furnace for 100min, and then the effective heating length is 50mm from the holding furnace Starting from the position, through three ultrasonic horns separated by 10 mm, ultrasonic action is performed on the continuously moving polycrystalline copper strip under the protection of inert gas. The temperature of the polycrystalline copper strip is controlled at 950°C, the ultrasonic vibration frequency is 30kHz, and the power is 250W / mm 2 ; Next, c...

Embodiment 3

[0022] This embodiment specifically implements a method for preparing a single crystal copper strip. Under the protection of a mixed gas of argon and hydrogen containing 0.5% hydrogen by volume, the polycrystalline copper strip with a thickness of 0.030mm and a width of 500mm obtained by cold rolling The copper strip is continuously fed into a closed holding furnace with a temperature of 1040°C; the polycrystalline copper strip enters a holding furnace with an effective heating length of 80cm at a speed of 8mm / min, and is kept in the furnace for 100min, and then the effective heating length is 50mm from the holding furnace Starting from the position, through three ultrasonic horns separated by 10 mm, ultrasonic action is performed on the continuously moving polycrystalline copper strip under the protection of inert gas. The temperature of the polycrystalline copper strip is controlled at 920°C, the ultrasonic vibration frequency is 20kHz, and the power is 300W / mm 2 ; Then, con...

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Abstract

The invention relates to monocrystalline copper, and specifically relates to a method utilizing crystal merging growth to prepare monocrystalline copper strips. Utilization of polycrystalline copper strips which can gradually merge and grow at a sufficiently high temperature, grain boundary areas can be gradually centralized together due to the merging growth process, when the grain boundary areas are large enough or two large enough crystals meet each other, an area which cannot be converted into a monocrystalline is formed; through a method of step-by-step continuous heating, the area which is not converted into the monocrystalline always remains relatively small size, at the same time, the part which is not converted into the monocrystalline is avoided from generating anisotropy by an ultrasonic vibration effect, and a continuous single-crystal strip area is eventually obtained by heating to grow for enough time.

Description

technical field [0001] The invention relates to single crystal copper, in particular to a method for preparing a single crystal copper strip by combining crystal growth. Background technique [0002] Copper has been widely used in integrated circuits, large-scale computers, electronic instruments, audio equipment and other fields due to its good electrical and thermal conductivity. With the rapid development of the electronic industry and communication technology, the amount of ultra-fine and high-fidelity transmission wires is increasing, which puts forward higher and higher requirements for the performance of conductor metals. Ordinary polycrystalline copper has been difficult to meet this requirement, and single crystal copper has broad application prospects due to the elimination of transverse grain boundaries and good fidelity performance. Hot-type continuous casting technology is an engineered directional solidification technology, which can produce single crystal cop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/02C22F1/08C22F3/00
Inventor 陈刚赵玉涛周小亮安子强
Owner XINGHUA PRECISION CASTING & FORGING IND RES INST CO LTD
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