High-Purity, Fine-Particle Boron Nitride Powder Synthesis at -75 to 750 Degrees C

Details

• Personal Author:
  Kalyoncu RS
• Description:
  Nonoxide ceramics with improved high-temperature properties could substitute for high-temperature alloys and reduce the nation's dependence on imports of Cr, CO, Ni, and Mn. To meet this objective, the Bureau of Mines conducted research to synthesize ultrafine reactive boron nitride (BN) powders. BN powders were prepared at temperatures ranging from -75 deg to 750 deg C. Low- temperature reactions (-75 deg to 200 deg C) between boron halides and N compounds led to formation of elemento-organic compounds that were thermally decomposed to ultrafine (approximately 100- to 150-a particle size) reactive BN powders. BN powders were also prepared through the reaction of a low-melting inorganic b compound (boric acid, borax) with an organic n compound (carbimide and thiocarbimide) in n2 and/or ammonia (NH3) atmospheres at temperatures between 500 deg and 750 deg C. This report is based upon work done under an agreement between the University of Alabama and the Bureau of Mines. [Description provided by NIOSH]
• Subjects:
  Ceramics Occupational Health Safety
• Keywords:
  Powder-particles; Synthesis; Ceramics; Boron-nitrides
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Conference Publications ; Case Report
• Place as Subject:
  Alabama ; OSHA Region 4
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  TURC - Tuscaloosa Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-9
• NIOSHTIC Number:
  nn:10005081
• NTIS Accession Number:
  PB86217940
• Citation:
  Tuscaloosa, AL: U.S. Department of the Interior, Bureau of Mines, RI 9012, 1986 Jan; :1-9
• Federal Fiscal Year:
  1986
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:7dc847c09aedf140bc731323e8446b4703641ae07d6ad9e7b7238120dab30b8f7dcaa9b938d34d035f87873a0fe7fec262d5d13dcaf290925445e82b6de3b57d
• Download URL:
  https://stacks.cdc.gov/view/cdc/236671/cdc_236671_DS1.pdf
• File Type:
  [PDF - 168.02 KB ]