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Preparing method for hexagonal boron nitride wrapping cobalt-nickel alloy

A hexagonal boron nitride, cobalt-nickel alloy technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of short circuit, soft heat conduction sheet material, etc., achieve low preparation cost, good tear resistance, good tear resistance Effect

Inactive Publication Date: 2016-09-07
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thermally conductive silicone gaskets are widely used as gap filler materials in electronic products, but the existing thermal pad materials are very soft, and there is a risk of being pierced and short-circuited when applied to the working conditions with pins on the back of the motherboard

Method used

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  • Preparing method for hexagonal boron nitride wrapping cobalt-nickel alloy
  • Preparing method for hexagonal boron nitride wrapping cobalt-nickel alloy
  • Preparing method for hexagonal boron nitride wrapping cobalt-nickel alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Weigh 1 g of ammonium borate and 2 g of a mixture of cobalt nitrate hexahydrate and nickel nitrate hexahydrate, mix and grind at room temperature for 20 minutes. Put it into a tube furnace for calcination, rise to 700°C at a heating rate of 5°C / min, and keep at 700°C for 5h. The product obtained after calcination is washed three times with ethanol and water respectively, and then put into a drying oven to dry to obtain a product of few-layer hexagonal boron nitride-coated nano-nickel particles.

[0029] figure 1 It is the FTIR spectrogram of the few-layer hexagonal boron nitride wrapped nano-nickel particles prepared in this embodiment; the boron nitride infrared characteristic peak of the product can be seen from the FTIR spectrogram, which proves that the boron nitride is successfully prepared.

Embodiment 2

[0031] Weigh 1 g of sodium borohydride and 3 g of cobalt acetate and nickel acetate, mix and grind at room temperature for 10 minutes. Put it into a tube furnace for calcination, rise to 1200°C at a heating rate of 10°C / min, and keep at 1200°C for 1h. The product obtained after calcination is washed with ethanol and water respectively, and then put into a drying oven to dry to obtain a product of few-layer hexagonal boron nitride-coated cobalt-nickel particles.

[0032] figure 2 It is the XRD spectrum of the hexagonal boron nitride-wrapped cobalt-nickel metal particles prepared in this example; the characteristic peaks of boron nitride and metal cobalt-nickel of the product can be seen from the XRD spectrum, which proves that the preparation of boron nitride-wrapped cobalt-nickel metal particles success.

Embodiment 3

[0034] Weigh 1 g potassium borohydride and 1.2 g cobalt chloride and nickel chloride respectively, mix and grind at room temperature for 10 minutes. Put it into a tube furnace for calcination, rise to 900°C at a heating rate of 5°C / min, and keep at 900°C for 5h. The calcined product is washed with ethanol and water respectively, and then put into a drying oven to dry to obtain a product of few-layer hexagonal boron nitride-wrapped nano-cobalt-nickel particles.

[0035] image 3 It is the SEM photo of the hexagonal boron nitride-wrapped cobalt-nickel metal particles prepared in this example; it can be seen from the SEM image that the hexagonal boron nitride completely wraps the metal cobalt-nickel particles, the number of layers of hexagonal boron nitride is ~10 nm, and the nano-nickel particles The diameter is ~50 nm, which proves that the boron nitride-coated cobalt-nickel metal particles were successfully prepared.

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Abstract

The invention belongs to the technical field of preparing of nanometer materials, and particularly relates to a preparing method for a hexagonal boron nitride wrapping cobalt-nickel alloy material. A precursor of hexagonal boron nitride and a precursor of a cobalt-nickel alloy compound are mixed to be ground according to a certain molar ratio, and under the nitrogen condition, hexagonal boron nitride wrapping nanometer cobalt nickel particles are prepared in a high-temperature roasting manner; and according to the method, raw materials are cheap and easy to obtain, the cost is low, the preparing method is easy to operate, and high pressure and strong oxidants involved in preparation of methods like an arc discharge method are avoided. The production yield is high, defects are few, and the hexagonal boron nitride wrapping nanometer cobalt-nickel alloy nano particles have the higher heat conduction performance, high-temperature oxidation resistance performance, good soft magnetic performance and insulation performance.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, specifically relates to the technical field of heat dissipation of electronic components, in particular to an inorganic composite metal nano particle interstitial material with high thermal conductivity, high mechanical strength and high temperature oxidation resistance. More specifically, it relates to a method for preparing few-layer hexagonal boron nitride-coated cobalt-nickel alloy particles, a method based on the preparation of cobalt-nickel alloy compound precursors, and roasting the hexagonal boron nitride precursor mixture to obtain few-layer hexagonal boron nitride coatings A method for cobalt-nickel alloy particles. Background technique [0002] With the development of industrial production and science and technology, people continue to put forward new requirements for materials. In the field of electronic appliances, due to the rapid development of integration technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/20B22F9/16B22F1/02
CPCB22F9/16B22F9/20B22F1/16
Inventor 范东亮吕晓萌冯金张素云刘军谢吉民
Owner JIANGSU UNIV
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