Physical-Chemical Variables in Processing Na2O - B2O3 - SiO2 Gel Monoliths

MRS Online Proceedings Library volume 32, Article number: 79 (1984) Cite this article

Abstract

The addition of a drying control chemical additive (DCCA) to the solvent allows short drying times for monolithic gel samples. The variables involved in the use of a DCCA in preparing gels from the Na2O-SiO2-B2O3 system are described. Due to its higher reactivity, a DCCA influences the chemical behavior of the material at each step of the processing. The effects of formamide as a DCCA on the gelation process, surface charge, and surface area are presented. The variations of the physical properties of the gel, due to the addition of the DCCA, are related to the reactions of the formamide with the sol. Although the DCCA helps in producing monolithic dried gels, the problem of densification is not solved as yet.

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References

  1. 1.

    S. Wallace and L. Hench, 8th Annual Conference on Composites and Advanced Ceramic Materials, Jan. 15–18, 1984, Cocoa Beach, FL.

  2. 2.

    S.H. Wang and L. Hench, Rth Annual Conference on Composites and Advanced Ceramic Materials, Jan. 15–18, 1984, Cocoa Beach, FL.

  3. 3.

    G. Creel and L. Hench, 8th Annual Conference on Composites and Advanced Ceramic Materials, Jan. 15–18, 1984, Cocoa Beach, FL.

  4. 4.

    J. Lannutti and D. Clark, 8th Annual Conference on Composites and Advanced Ceramic Materials, Jan. 15–18, 1984, Cocoa Beach, FL.

  5. 5.

    T. Michalske and S. Freiman, J. Am. Ceram. Soc., 66 [4], 4 (1981).

    Google Scholar 

  6. 6.

    C.J. Brinker in: Ultrastructure Processing of Ceramics, Glasses and Composites, L.L. Hench and D.R. Ulrich, eds., (John Wiley & Sons, New York, NY 1984), Chp. 5.

    Google Scholar 

  7. 7.

    L.C. Klein, and G.J. Garvey, Effect of Water on Acid and Base Catalyzed Hydrolysis of Tetraethylorthosilicate (TEOS), presented at Materials Research Society (1984), Spring meeting, Albuquerque, NM.

  8. 8.

    D.P. Partlow and B.E. Yoldas, J. H. C. S., 46, 153 (1981).

    CAS  Google Scholar 

  9. 9.

    H. Schmidt, H. Scholze, A. Kaiser, J. N. C. S., 68, 65 (1982).

    Google Scholar 

  10. 10.

    M. Voronkov, V. Mileshkevich and Y. Yuzhelevskii, The Siloxane Bond, Consultants Bureau, New York, 1978.

    Google Scholar 

  11. 11.

    R.K. Iler, The Colloid Chemistry of Silica and Silicate, Cornell University Press, 1955.

  12. 12.

    J.A. Riddick and W.B. Bunger in: Techniques of Chemistry — Vol. 2, Organic Solvents, 3rd Ed. (Wiley-Interscience, New York, 1970).

    Google Scholar 

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Affiliations

  1. Materials Science and Engineering, University of Florida, Gainesville, Florida, 32611, USA

    Gerard Orcel & Larry L. Hench

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  1. Gerard Orcel
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  2. Larry L. Hench
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Correspondence to Gerard Orcel.

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Orcel, G., Hench, L.L. Physical-Chemical Variables in Processing Na2O - B2O3 - SiO2 Gel Monoliths. MRS Online Proceedings Library 32, 79 (1984). https://doi.org/10.1557/PROC-32-79

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