• 专利标题:   Preparing boron carbide nano powder comprises e.g. mixing graphene oxide and boron powder, adding ethanol, passing an inert gas, reacting, heating graphene oxide-coated boron powder under inert gas and cooling in the furnace.
  • 专利号:   CN110627068-A
  • 发明人:   JIN L, JIA J, BAI L, LIU G, FENG J, LI C, ZHANG P
  • 专利权人:   NORTHWEST INST NONFERROUS METALS
  • 国际专利分类:   C01B032/991
  • 专利详细信息:   CN110627068-A 31 Dec 2019 C01B-032/991 202006 Pages: 8 Chinese
  • 申请详细信息:   CN110627068-A CN11068860 05 Nov 2019
  • 优先权号:   CN11068860

▎ 摘  要

NOVELTY - Preparing boron carbide nano powder comprises (i) mixing graphene oxide and boron powder, placing in a three-neck round bottom flask, adding ethanol and passing an inert gas, reacting under mechanical stirring, and allowing to stand, layering and removing the solvent to obtain a graphene oxide coated boron powder, (ii) placing the graphene oxide-coated boron powder in a heating device and passing inert gas for low-temperature heat treatment at 200-400 degrees C for 0.5-2 hours and cooling in the furnace to obtain boron carbide, and (iii) heat-treating the boron carbide at 800-1200 degrees C for 0.5-5 hours or a vacuum condition to obtain a boron carbide nano powder. USE - The method is useful for preparing boron carbide nano powder. ADVANTAGE - The method utilizes high specific surface area and high reactivity graphene oxide, reduces content of impurities and preparation costs, and improves purity.