Evolution of Composition and Structure of Poly[(alkylamino)borazine] to Boron Nitride Ceramic during Pyrolysis Process

Abstract:

Boron nitride (BN) was prepared by polymer-derived method using precursor poly [(alkylamino) borazin (PABZ). The evolution of composition and structure of precursor PABZ into BN ceramic during curing and pyrolysis process was investigated by FTIR, TG, XRD techniques and chemical analysis. The results showed that PABZ could fulfill curing heated at 80°C for 2hrs in NH₃ atmosphere. During the curing process the both transamination reaction and condensation reaction occurred, resulting in cross-link between monomer molecular. With the proceeding of curing process, the new B-N bonds were formed and continued to expand in three dimensions. After cured treatment the thermal pyrolysis of PABZ in ammonia atmosphere was took place, and inorganic degree and crystallinity of products were better, which was more suitable for preparation of high purity hexagonal BN (h-BN) ceramic.

• Periodical: Key Engineering Materials (Volumes 602-603)
• Pages: 146-150
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.602-603.146
• Online since: March 2014
• Authors: Cheng Deng, Meng Fu Zhu, Hong Bo Su, Xiu Dong You, Ping Chen
• Keywords: BN Ceramic, Curing Process, Poly[(alkylamino)borazine] Precursor, Pyrolysis

References

[1] R. T. Paine, C. K. Narula, Synthetic routes to boron nitride, Chem. Rev. 90 (1990) 73-91.

DOI: 10.1021/cr00099a004

[2] Y. Kimura, Y. Kubo, N. Hayashi, High-performance boron-nitride fibers from poly(borazine) preceramics, Compos. Sci. Technol. 51 (1994) 173-179.

DOI: 10.1016/0266-3538(94)90188-0

[3] T. Wideman, L. G. Sneddon, Dipentylamine-modified polyborazylene: a new, melt-spinnable polymeric precursor to boron nitride ceramic fibers, Chem. Mater. 8 (1996) 3-5.

DOI: 10.1021/cm950398b

[4] B. Toury, P. Miele, D. Cornu, H. Vincent, J. Bouix, Boron nitride fibers prepared from symmetric and asymmetric alkylaminoborazines, Adv. Funct. Mater. 12 (2002) 228-234.

DOI: 10.1002/1616-3028(200203)12:3<228::aid-adfm228>3.0.co;2-u

[5] C. Deng, Y. C. Song, Y. D. Wang, Y. H. Li, Y. P. Lei, Preparation and characterization of polymeric precursor for boron nitride fibers, Chem. J. Chinese Universities 31 (2010) 623-628.

[6] P. Miele, B. Toury, D. Cornu, Borylborazines as new precursors for boron nitride fibres, J. Organomet. Chem. 690 (2005) 2809-2814.

DOI: 10.1016/j.jorganchem.2005.02.039

[7] B. Toury, P. Miele, A new polyborazine-based route to boron nitride fibres, J. Mater. Chem. 14 (2004) 2609-2611.

DOI: 10.1039/b408633c

[8] C. Deng, Y. C. Song, Y. D. Wang, Y. H. Li, Y. P. Lei, A facile synthesis of 2, 4, 6-trichloroborazine from boron trichloride-dimethylsulfide complex, Chinese Chem. Lett. 21 (2010) 135-138.

DOI: 10.1016/j.cclet.2009.10.016

[9] C. Deng, Y. C. Song, Y. D. Wang, Y. H. Li, Y. P. Lei, Synthesis of polymeric precursor for boron nitride through substitution reaction of methylamine, Acta Chim. Sin. 68 (2010) 1217-1222.

[10] S. Bernard, D. Cornu, P. Miele, H. Vincent, J. Bouix, Pyrolysis of poly[2, 4, 6-tri(methylamino) borazine] and its conversion into BN fibers, J. Organomet. Chem. 657 (2002) 91-97.

DOI: 10.1016/s0022-328x(02)01543-7

[11] D. Cornu, P. Miele, B. Toury, Boron nitride matrices and coatings from boryl borazine molecular precursors, J. Mater. Chem. 9 (1999) 2605-2610.

DOI: 10.1039/a904318g

[12] B. Toury, S. Bernard, D. Cornu, High-performance boron nitride fibers obtained from asymmetric alkylaminoborazine, J. Mater. Chem. 13 (2003) 274-279.

DOI: 10.1039/b207476a

[13] P. Gerstel, A. Müller, J. Bill, F. Aldinger, Synthesis and high-temperature behavior of Si/B/C/N precursor-derived ceramics without free carbon, Chem. Mater. 15 (2003) 4980-4986.

DOI: 10.1021/cm031120j

[14] D. A. Lindquist, J. F. Janik, A. K. Datye, Boron nitride fibers processed from poly(boraziny1 amine) solutions, Chem. Mater. 4 (1992) 17-19.

DOI: 10.1021/cm00019a007

[15] P. Dibandjo, L. Bois, F. Chassagneux, Thermal stability of mesoporous boron nitride templated with a cationic surfactant, J. Eur. Ceram. Soc. 27 (2007) 313-317.

DOI: 10.1016/j.jeurceramsoc.2006.04.178