PRODUCTION OF SOLID MATERIAL COMPOSED MAINLY OF BORON, CARBON AND NITROGEN

摘要

PURPOSE:To produce a solid material having uniform composition with a simplified apparatus in high yield and short time at a low reaction temperature compared with CVD process by reacting a polymer as a carbon and nitrogen source with a boron source gas and a carrier gas. CONSTITUTION:A powdery polymer such as acrylonitrile, imide, amide or guanamine resin polymer is used as a polymer for carbon and nitrogen source and made to react with a boron-source gas (e.g. BCl3) using a quartz reaction tube in a carrier gas (e.g. nitrogen gas) under atmospheric pressure. The polymer raw material is placed at the center of the furnace core tube and heated at 100-600 deg.C while introducing the boron source gas and the carrier gas into the tube. The introduction of the boron source gas is stopped and the temperature is lowered when the color of the powdery polymer becomes complete black color. The recovered product is heat-treated at 1000 deg.C for about 1hr. The product is a solid material composed mainly of boron, carbon and nitrogen and having X-ray diffraction peaks in the ranges of 20-30 deg. and 40-50 deg. (2theta) by X-ray diffraction method with Cu-Kalpha line.