Fig. 9. Number of ideally hybridized sp, sp² and sp³ atoms for B (pink) and N (blue) atoms at (a) 2000 K and (b) 4000 K, as a function of time for the BN precursor system. Probabilities of formation of (c) sp, (d) sp² and (e) sp³ hybridized B and N atoms at various temperatures, as a function of time.