A preparation method of hexagonal boron nitride-wrapped copper nanoparticles
A hexagonal boron nitride, nano-copper technology, applied in nanotechnology, transportation and packaging, metal processing equipment and other directions, can solve the problems of large thermal expansion coefficient, poor insulation, poor molding process performance, etc., and achieve good high-temperature oxidation resistance. Excellent thermal conductivity, easy operation and control effect
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Embodiment 1
[0025] Weigh 1 g of ammonium borate and 2 g of copper nitrate, mix and grind at room temperature for 10 minutes. Put it into a tube furnace for calcination, rise to 700°C at a heating rate of 1°C / min, and keep at 700°C for 1h. 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 hexagonal boron nitride-coated nano-copper particle product. The boron nitride infrared characteristic peak of the product can be seen from the FTIR spectrum, which proves that the boron nitride is successfully prepared.
[0026] figure 1 It is the FTIR spectrogram of hexagonal boron nitride wrapped nano-copper particles and hexagonal boron nitride prepared in this embodiment. The boron nitride infrared characteristic peak of the product can be seen from the FTIR spectrum, which proves that the boron nitride is successfully prepared.
Embodiment 2
[0028] Weigh 1 g sodium borohydride and 3 g copper acetate respectively, 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 5 hours. 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 hexagonal boron nitride-coated nano-copper particle product. The characteristic peaks of boron nitride and metal elemental copper of the product can be seen from the XRD spectrum, which proves that the boron nitride and copper metal particles are successfully prepared.
[0029] figure 2 It is the XRD spectrum of the hexagonal boron nitride wrapped nano-copper particles prepared in this example, commercial boron nitride and hexagonal boron nitride. The characteristic peaks of boron nitride and metal copper of the product can be seen from the XRD spectrum, which proves that the boron nitri...
Embodiment 3
[0031] Weigh 1 g of potassium borohydride and 1.2 g of tetraammine copper 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 2h. 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 hexagonal boron nitride-coated nano-copper particle product. It can be seen from the SEM spectrum that the hexagonal boron nitride completely wraps the metal copper particles, the thickness of the hexagonal boron nitride is ~10 nm, and the diameter of the nano-copper particles is 100-300 nm, which proves that the boron nitride-wrapped copper metal particles are successfully prepared.
[0032] image 3 It is the SEM photo of the hexagonal boron nitride wrapped nano-copper particles prepared in this embodiment. It can be seen from the SEM spectrum that the hexagonal boron ni...
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Abstract
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