Fire protection performance of oxidized graphite modified with boric acid


We have studied intercalation in the graphite-H2SO4-H3BO3-K2Cr2O7 system with the acids in the weight ratio 1: 0, 12: 1, 6: 1, or 3: 1. The results demonstrate that, with decreasing sulfuric acid (active intercalant) concentration in solution, the stage number of the resultant graphite intercalation compounds increases. Boric acid modification raises the oxidation onset temperature of oxidized graphite by 200–300°C and improves its fire protection performance, with little or no effect on the bulk density of exfoliated graphite.

This is a preview of subscription content, log in to check access.


  1. 1.

    Toyoda, M. and Inagaki, M., Heavy Oil Sorption Using Exfoliated Graphite: New Application of Exfoliated Graphite to Protect Heavy Oil Pollution, Carbon, 2000, vol. 38, pp. 199–210.

    Article  CAS  Google Scholar 

  2. 2.

    Shornikova, O.N., Dunaev, A.V., Maksimova, N.V., and Avdeev, V.V., Synthesis and Properties of Ternary GIC with Iron or Copper Chlorides, J. Phys. Chem. Solids, 2006, vol. 67, pp. 1193–1197.

    Article  CAS  Google Scholar 

  3. 3.

    Weng, Zh., Hand, E., and Ke, W., Influence of Expandable Graphite on Fire Resistance and Water Resistance of Flame-Retardant Coatings, Corros. Sci., 2007, vol. 49, no. 5, pp. 2237–2253.

    Article  Google Scholar 

  4. 4.

    Gao, Q., Song, J., Liu, L., and Zhang, B., Oxidation Protection of Graphite and B4C-Modified Graphite by a SiC-Coating, Carbon, 1999, vol. 37, no. 1, pp. 149–152.

    Google Scholar 

  5. 5.

    Parashar, V.K., Raman, V., and Bahi, O.P., Oxidation Resistant Material for Carbon/Carbon Composites by the Sol-Gel Process, J. Mater. Sci. Lett., 1997, vol. 16, no. 6, pp. 479–481.

    Article  CAS  Google Scholar 

  6. 6.

    Tsou, H.T. and Kowbel, W., Design of Multilayer Plasma-Assisted CVD Coating for the Oxidation Protection of Composite Materials, Surf. Coat. Technol., 1996, vol. 79, no. 1, pp. 139–150.

    Article  CAS  Google Scholar 

  7. 7.

    Weiming, L. and Chung, D.D.L., Oxidation Protection of Carbon Materials by Acid Phosphate Impregnation, Carbon, 2000, vol. 40, pp. 1249–1254.

    Google Scholar 

  8. 8.

    Ehrbuger, P., Baranne, P., and Lahaye, J., Inhibition of the Oxidation of Carbon-Carbon Composite by Boron Oxide, Carbon, 1996, vol. 34, pp. 769–774.

    Article  Google Scholar 

  9. 9.

    Sogabe, T., Okada, O., Kuroda, K., and Inagaki, M., Improvement in Properties and Air Oxidation Resistance of Carbon Materials by Boron Oxide Impregnation, Carbon, 1997, vol. 35, no. 1, pp. 67–72.

    Article  CAS  Google Scholar 

  10. 10.

    Sorokina, N.E., Leshin, V.S., and Avdeev, V.V., Electrochemical Intercalation in the Graphite-H2SO4-R (R = CH3COOH, H3PO4) System, J. Phys. Chem. Solids, 2004, vol. 65, pp. 185–190.

    Article  CAS  Google Scholar 

  11. 11.

    Monyakina, L.A., Maksimova, N.V., Nikol’skaya, I.V., et al., The Calorimetric Investigation of the Graphite-HNO3-R System (R = CH3COOH, H2SO4), J. Phys. Chem. Solids, 2004, vol. 65, pp. 181–183.

    Article  CAS  Google Scholar 

  12. 12.

    Sorokina, N.E., Maksimova, N.V., and Avdeev, V.V., Intercalation of Graphite in the Ternary Systems C-NHO3-R (R = H2O, CH3COOH, H3PO4, H2SO4), Inorg. Mater., 2002, vol. 38, no. 6, pp. 564–570.

    Article  CAS  Google Scholar 

Download references

Author information



Corresponding author

Correspondence to M. I. Saidaminov.

Additional information

Original Russian Text © M.I. Saidaminov, N.V. Maksimova, N.G. Kuznetsov, N.E. Sorokina, V.V. Avdeev, 2012, published in Neorganicheskie Materialy, 2012, Vol. 48, No. 3, pp. 312–316.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Saidaminov, M.I., Maksimova, N.V., Kuznetsov, N.G. et al. Fire protection performance of oxidized graphite modified with boric acid. Inorg Mater 48, 258–262 (2012).

Download citation


  • Boric Acid
  • Oxidize Graphite
  • Exfoliate Graphite
  • Stage Number
  • Graphite Foil