Preparation of Crystalline Turbostratic Boron Nitride Nanoparticles by Combination of Precursor Compound Formation and Impurity Segregation from Boric Acid and Urea

Abstract:

Crystalline turbostratic boron nitride (t-BN) was prepared by a combination of precursor compound formation and impurity segregation from boric acid (H₃BO₃) and urea. A mixed material was prepared by separately dissolving H₃BO₃ and urea in distilled water then blended them, which was followed by drying. A precursor compound including oxygen was formed from the mixed material upon low-temperature heat treatment at 250 °C. The oxygen-containing impurity was segregated as a boron oxide component by the hydrolysis of the precursor compound during the grinding process in air, leading to the effective layered structure formation and layer stacking of t-BN. Crystalline t-BN nanoparticles with well-stacked layered structures were prepared by leaching the segregated impurity in a hot aqueous solution of the product formed by heat treatment at 1300 °C in an Ar flow.

• Periodical: Key Engineering Materials (Volume 534)
• Pages: 55-60
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.534.55
• Online since: January 2013
• Authors: Masaki Kakiage, Daisuke Yoshikoshi, Ikuo Yanase, Hidehiko Kobayashi
• Keywords: Boric Acid, Non-Oxide Ceramics, Precursor Compound, Turbostratic Boron Nitride, Urea

References

[1] A. Lipp, K.A. Schwetz and K. Hunold: J. Eur. Ceram. Soc. Vol. 5 (1989), p.3.

[2] R.T. Paine and C.K. Narula: Chem. Rev. Vol. 90 (1990), p.73.

[3] T.E. O'Connor: J. Am. Chem. Soc. Vol. 84 (1962), p.1753.

[4] J. Thomas, N.E. Weston and T.E. O'Connor: J. Am. Chem. Soc. Vol. 84 (1962), p.4619.

[5] S. Alkoy, C. Toy, T. Gönül and A. Tekin: J. Eur. Ceram. Soc. Vol. 17 (1997), p.1415.

[6] M. Hubáček, T. Sato and T. Ishii: J. Solid State Chem. Vol. 109 (1994), p.384.

[7] C. Guimon, D. Gonbeau, G. Pfister-Guillouzo, O. Dugne, A. Guette, R. Naslain and M. Lahaye: Surf. Interface Anal. Vol. 16 (1990), p.440.

DOI: 10.1002/sia.740160191

[8] L. Shen, B.J. Tan, W.S. Willis, F.S. Galasso and S.L. Suib: J. Am. Ceram. Soc. Vol. 77 (1994), p.1011.

[9] X. Gouin, P. Grange, L. Bois, P. L'Haridon and Y. Laurent: J. Alloy. Compd. Vol. 224 (1995), p.22.

[10] J. Economy, R.V. Anderson and V.I. Matkovich: Appl. Polym. Symp. Vol. 9 (1969), p.377.

[11] R. Geick, C.H. Perry and G. Rupprecht: Phys. Rev. Vol. 146 (1966), p.543.

[12] J.L. Parsons and M.E. Milberg: J. Am. Ceram. Soc. Vol. 43 (1960), p.326.

[13] T. Hagio, K. Nonaka and T. Sato: J. Mater. Sci. Lett. Vol. 16 (1997), p.795.