Aerosol synthesis of spherical morphology boron nitride powders from organoborate precursors

Chemistry of Materials

Volumn 18, Issue 6, 2006, Pages 1434-1442

  Wood, Gary L ^b   Janik, Jerzy F ^c   Pruss, Eugene A ^a   Dreissig, Dirk ^a   Kroenke, William J ^a   Habereder, Tassilo ^a   Nöth, Heinrich ^d   Paine, Robert T ^a  

^a NATIONAL SCIENCE FOUNDATION   (United States)

^b VALDOSTA STATE UNIVERSITY   (United States)

^c AGH UNIVERSITY OF SCIENCE AND TECHNOLOGY   (Poland)

^d UNIVERSITY OF MUNICH   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

NITRIDATION; ORGANOBORATE PRECURSORS; PRECURSOR POWDER; SINGLE-CRYSTAL X-RAY DIFFRACTION METHODS; SPHERICAL MORPHOLOGY;

AMMONIA; BORON COMPOUNDS; SCANNING ELECTRON MICROSCOPY; SYNTHESIS (CHEMICAL); TRANSMISSION ELECTRON MICROSCOPY; X RAY DIFFRACTION ANALYSIS;

AEROSOLS;

EID: 33645509149     PISSN: 08974756     EISSN: None     Source Type: Journal    
DOI: 10.1021/cm052032x     Document Type: Article

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42. 3.
43. z where x, y, and z vary depending upon reactor process parameters. These products contain small amounts of hydrogen as well. These products are also referred to as stage 1 products and are the solid-state precursor for stage 2 calcinations that produce BN containing low levels of O, C, and H impurities.
44. z powder was recovered on the impact filter. On the basis of the elemental analysis of the product, this corresponds to ∼97% recovery of boron.
45. 3 and formation of gaseous byproducts, e.g., MeOH in the reactor.
46. 3 = 0.5 L/min gave B 27.24, C 0.59, H 1.22, N 35.61, O 22.6.
47. As an example, the analysis of a second-stage sample, obtained from calcination of stage 1 sample prepared at 1400°C, gave B 43.68, C 0.60, H 0.96, N 55.69, O 0.73. This sample displayed a measured 14.5% mass loss.