Abstract
Samples of pyrolytic BN ceramics were produced by CVD from BCl3-NH3-N2 mixtures at temperatures of 1300–2100°C, pressures 1–20 torr and varying partial pressures of the components. A theoretical analysis of the dependences of i.r. spectral band frequencies on interlayer distance and crystal block size is given. Five BN structure modifications have been found in BN ceramics from i.r. band shape analysis: hexagonal graphite-like, partially ordered, turbostratic, dense amorphous and highly dispersed amorphous, whose relative content strongly depends on the synthesis conditions.
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Rozenberg, A.S., Sinenko, Y.A. & Chukanov, N.V. I.r. spectroscopy characterization of various types of structural irregularities in pyrolytic boron nitride. JOURNAL OF MATERIALS SCIENCE 28, 5675–5678 (1993). https://doi.org/10.1007/BF00367846
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DOI: https://doi.org/10.1007/BF00367846