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Structural Design and Synthesis of H3O+-β”/βAl2O3 and NH4-β”/β-Al2O3 Polycrystals

Published online by Cambridge University Press:  21 February 2011

Patrick S. Nicholson
Patrick S. Nicholson*
Affiliation:
Ceramic Engineering Research Group Department of Materials Science and Engineering McMaster University Hamilton, Ontario, Canada L8S 4L7
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Abstract

The synthesis and characterization of H3Oβ”/β-Al2O3 and NH4 + -H3O+β”/β-Al2O3 poly-crystals is described. The role of stress development and control in the intermediate stages of ion-exchange of the NaK-β”/βA12O3 ceramics is analysed and identifies the β-Al2O3 phase as acting as inert reinforcement for the two-phase composite. The Rb + ion-exchange of the intermediate K + β”/β-Al2O3 requisite for NH4+/H3O + ion-exchange to NH4-H3O+β”/βAl2O3 is described as also is the NH4NO3 exchange to the final ceramic. The total weight loss on heating NH4-H3O+β”/βAl2O3 polycrystals to 810°C is 7.4% which agrees with the value expected from the chemical formula. The 25°C conductivity of the grains of NH4 +-H3O + β”/βAl2O3 was 1.7 × 10−4 (ω-cm)−1 and the bulk conductivity was 3 × 10−5(ω-cm)−1.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 135: Symposium M – Solid State Ionics I , 1988 , 511
Copyright
Copyright © Materials Research Society 1989

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References

1. Farrington, G.C. and Brant, J.L., Mater. Res. Bull. 13 (1978), 763.CrossRefGoogle Scholar
2. Nicholson, P.S., Munshi, M.Z.A., Singh, G., Sayer, M. and Bell, M.F., Solid State lonics 18–19 (1986), 699.CrossRefGoogle Scholar
3. Farrington, G.C., Frase, K.G. and Thomas, J.O., Adv. in Matls. Sci. (1984).Google Scholar
4. Thomas, J.O. and Farrington, G.C., Act Cryst. B39 (1983) 227.CrossRefGoogle Scholar
5. Thomas, J.O., McIntyre, E. and Nuzzio, J. De, Sol. State Ionics (in press).Google Scholar
6. Ochadlick, A.R. Jr., Bailey, W.C., Stamp, R.L., Story, H.S., Farrington, G.C. and Brant, J.L.. Fast Ion Transport in Solids, ed. Vashita, Mundy, and Shenoy, , Elsevier (1979) p. 401–404.Google Scholar
7. Hooper, A. and Tofield, B.C., Fast Ion Transport in Solids. p. 409–412.Google Scholar
8. Slade, R.C.T., Fridd, P.F. and Halstead, T.K. and McGeehin, P., J. Solid St. Chem., 32 (1980) 87–95.CrossRefGoogle Scholar
9. Tsurumi, T., Ikawa, H., Ishimori, M., Urabe, K. and Udagawa, S. Sol. State Ionics 21 (1986) 31–35.CrossRefGoogle Scholar
10. Munshi, M.Z.A. and Nicholson, P.S., Sol. State Ionics 23 (1987) 203–209.CrossRefGoogle Scholar
11. Tsurumi, T., Singh, G. and Nicholson, P.S., Sol. State Ionics 23 (1-2) (1987) 81–88.CrossRefGoogle Scholar
12. Tsurumi, T., Singh, G. and Nicholson, P.S., Sol. State Ionics 22 (1987) 225–230.CrossRefGoogle Scholar
13. Tan, A. and Nicholson, P.S., Sol. State Ionics in press.Google Scholar
14. Klotz, I.M., Chemical Thermodynamics (Prentice Hall NY 1950) p. 278.Google Scholar
15. Boley, B.A. and Weiner, D.H. Theory of Thermal Stresses (Wiley NY 1900) pg. 277–279.Google Scholar
16. Evans, A.G., Acta Met. 26 (1978) 1845.CrossRefGoogle Scholar
17. lyi, N. and Nicholson, P.S. (unpublished results - to be submitted to Sol. State Ionics).Google Scholar
18. Gilling, D., Tofield, B.C., McGeehin, P. and Hooper, A., U.K. Patent GB 2109782 A (1983).Google Scholar
19. Bell, M.F., Sayer, M. and Nicholson, P.S. Sol. State Ionics 18–19 (1986) 672.CrossRefGoogle Scholar