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Introduction to the main production methods of boron nitride

Posted on 2020-06-30 14:12 ET

Brief Introduction of Hexagonal Boron Nitride by Hummer Method

 

The hexagonal boron nitride (BN)nanosheets were stripped with polyvinyl alcohol and polyethylene glycol, respectively, and composite materials of hexagonal boron nitride nanosheets, vinyl alcohol, and hexagonal boron nitride nanosheets were synthesized. Their thermal and optical properties were studied. Thermogravimetric analysis shows that the addition of hexagonal boron nitride nanosheets can effectively improve the thermal stability of polyvinyl alcohol (PVA) and polyethylene glycol (PEG) polymer materials. When the amount of H.BNNSS added was 3%, the composite material's oxidative decomposition temperature increased by 9and 20, respectively. The analysis and characterization of the ultraviolet-visible spectrophotometer indicate that these two composite materials have functional absorption capacity of near 194 nm in the deep ultraviolet region, and can be used in the fields of light-emitting devices and drug diagnosis.

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Preparation of hexagonal boron nitride powder by chemical vapor deposition (CVD)


The preparation of hexagonal boron nitride powder by chemical vapor deposition usually uses a hot-wall reactor. The gaseous substances containing B and N enter the reaction chamber through the carrier gas. A chemical reaction occurs between gaseous substances, producing boron nitride powder at high temperatures. The boron source generally uses B (OCH3) 3, BF3, B2H6, BBr3, and BCl3 containing boron compounds, and the nitrogen source is usually n2 or NH3. Using ammonia water and trihydroxyborate as raw materials, hexagonal boron nitride nanoparticles were prepared by chemical vapor deposition at 1350, and the reaction temperature can be lowered by selecting appropriate raw materials. Using ethyl borate and ammonia water as raw materials, boron nitride nanospheres containing oxygen impurities were synthesized at 700°C and then ammoniated to remove oxygen at 1000°C in an ammonia atmosphere. Hexagonal boron nitride nanospheres with a particle size of 80-120nm were obtained. Hexagonal boron nitride nanospheres with a particle size of 80-120nm were obtained by ammoniating and deoxidizing at 1000in an ammonia atmosphere.

 

Trunnano is one of the world's largest nitride manufacturers. Boron nitride is one of the leading products. If you are interested in boron nitride, please contact Dr. Leo, email: brad@ihpa.net.


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