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Hot pressing and physical properties of Na beta alumina

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Abstract

Dense transparent/translucent Na-gb-alumina was hot pressed using commercial powders having low SiO2 contents provided that agglomerates could be broken down by milling. Partial (up to 60 vol %) transformation to alpha alumina during hot pressing was caused by SiO2 either present in some powders, or introduced by excessive milling or present through the addition of Na2O-SiO2 glass. Such transformation also results from increased storage time or from direct water contamination. Two wt % MgO was used to aid densification, and 2 wt % Na2O to aid conductivity. Flexure strengths averaging 290 MN m−2, a measured Young's modulus of 21.3×104 MN m−2, and the observed pores or flaws at the fracture origins gave calculated values for the fracture energy in good agreement with the directly measured value of 13 J m−2, for larger pores and flaws. The ionic resistivity was low, e.g. ∼3 Ω cm at 350° C. Effects of surface finish, limited porosity and hot pressing texture varied resistivity by up to a factor of 10.

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References

  1. M. S. Whittingham andR. A. Huggins, ‘Proc. Solid State Chemistry,’ edited by R. S. Roth and S. J. Schneider, Jr., (NBS Spec. Pub. 364, Washington, D. C. 1972) p. 139.

  2. R. C. Devries andW. L. Roth,J. Amer. Ceram. Soc. 52 (1969) 364. 1969.

    Article  CAS  Google Scholar 

  3. J. T. Kummer, “Prog. Solid State Chem.”, edited by H. Reiss and J. O. McCaldin, (Pergamon Press, New York, 1972) p. 141.

    Google Scholar 

  4. W. Vangool, “Annual Review Materials Science”, Vol 4 (Annual Reviews Inc., Palo Alto, 1974) p. 311.

    Google Scholar 

  5. I. Wynn Jones andL. J. Miles,Proc. Brit. Ceram. Soc. 19 (1971) 161.

    Google Scholar 

  6. T. L. Francis, F. E. Phelps andG. Maczura,Amer. Ceram. Soc. Bull. 50 (1971) 615.

    CAS  Google Scholar 

  7. J. H. Kennedy andA. F. Sammells,J. Electrochem. Soc. 119 (1972) 1609.

    Article  CAS  Google Scholar 

  8. P. McGeehin andA. Hooper,J. Mater. Sci. 12 (1977).

  9. D. R. Flinn, W. J. McDonough, K. H. Stern andR. W. Rice,Electrochem Soc. Ext. Abs. 75 (1975) 23.

    Google Scholar 

  10. H. B. Huntington,Phys. Rev. 72 (1947) 321.

    Article  CAS  Google Scholar 

  11. C. S. Barrett andT. B. Massalski, “Structure of Metals,” (McGraw-Hill, New York, 1966).

    Google Scholar 

  12. W. L. Fielder, S. Fordyce andJ. Singer, NASA Report No. TMX–71546.

  13. A. Imai andM. Harata,Jap. J. Appl. Phys. 8 (1972) 180.

    Article  Google Scholar 

  14. S. W. Freiman, D. R. Mulville andP. W. Mast,J. Mater. Sci. 8 (1973) 1527.

    Article  CAS  Google Scholar 

  15. M. Shad, B. Dunn, M. Minami andJ. D. Mackenzie, presented at 77th Meeting, Amer. Ceram. Soc., Washington D. C. 1975.

  16. F. Y. Tsiang, presented at 77th Meeting, Amer. Ceram. Soc., Washington D. C., 1975.

  17. Y. Lazennec, private communication (1976).

  18. R. W. Rice, NRL Report No. 7111, Naval Research Laboratory, Washington D. C., 1970.

    Google Scholar 

  19. R. W. Powers andS. P. Mitoff,J. Electrochem. Soc. 122 (1975) 226.

    Article  CAS  Google Scholar 

  20. W. H. Rhodes, D. J. Sellers andT. Vasilos,J. Amer. Ceram. Soc. 58 (1975) 31.

    Article  CAS  Google Scholar 

  21. A. V. Virkar andR. S. Gordon,ibid. 60 (1977) 58.

    Article  CAS  Google Scholar 

  22. S. R. Tan andG. J. May,J. Mater. Sci. 12 (1977) 1058.

    Article  CAS  Google Scholar 

  23. R. Stevens,ibid. 9 (1974) 934.

    Article  CAS  Google Scholar 

  24. G. R. Irwin andP. C. Paris, “Fracture — An Advances Treatise”, Vol III, edited by H. Liebowitz, (Academic Press, New York, 1971).

    Google Scholar 

  25. A. G. Evans andR. W. Davidge,J. Nuclear Mater. 33 (1969) 249.

    Article  CAS  Google Scholar 

  26. R. W. Rice, R. C. Pohanka, andW. J. McDonough, to be published.

  27. R. C. Pohanka, R. W. Rice, B. E. Walker andP. L. Smith,Ferroelectrics 10 (1976) 231.

    Article  CAS  Google Scholar 

  28. G. J. May andR. W. Rice, private communication (1977).

  29. T. J. Whalen, G. J. Tennenhouse andC. Meyer,J. Amer. Ceram. Soc. 57 (1974) 497.

    Article  CAS  Google Scholar 

  30. J. H. Kennedy, “Superionic Conductors”, ed. G. D. Mahan and W. L. Roth, 351–68, (Plenum Press, New York, 1976) p. 351.

    Google Scholar 

  31. R. W. Powers,ibid.“, p. 351.

    Chapter  Google Scholar 

  32. D. D. Williams, J. A. Grand andR. R. Miller, NRL Memorandum Report No. 424, Naval Research Laboratory, Washington D. C., 1955.

    Google Scholar 

  33. R. D. Armstrong, T. Dickinson andJ. Tunrer,Electroanalyt. Inter. Electrochem. 44 (1973) 157.

    Article  CAS  Google Scholar 

  34. R. W. Rice, Proceedings of the Second Army Materials Technology Conference, sponsored by Army Mtls. and Mech. Res. Center, Watertown, Mass., 1973.

  35. G. J. Tennenhouse, R. C. Ku, R. H. Richman andT. J. Whalen,Amer. Ceram. Soc. Bull. 54, (1975) 923.

    Google Scholar 

  36. M. Harata, private communication (1975).

  37. W. C. Johnson, D. F. Stein andR. W. Rice,J. Amer. Ceram. Soc. 57 (1974) 342.

    Article  CAS  Google Scholar 

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Author notes

  1. D. R. Flinn

    Present address: Bureau of Mines, College Park, Maryland

Authors and Affiliations

  1. Naval Research Laboratory, 20375, Washington, DC, USA

    W. J. McDonough, D. R. Flinn, K. H. Stern & R. W. Rice

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  1. W. J. McDonough
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  2. D. R. Flinn
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  3. K. H. Stern
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  4. R. W. Rice
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McDonough, W.J., Flinn, D.R., Stern, K.H. et al. Hot pressing and physical properties of Na beta alumina. J Mater Sci 13, 2403–2412 (1978). https://doi.org/10.1007/BF00808055

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