Hostname: page-component-745bb68f8f-b95js Total loading time: 0 Render date: 2025-01-28T23:43:20.228Z Has data issue: false hasContentIssue false
  • English
  • Français

Crystallization Of Oxide Films Derived From Metallo-Organic Precursors

Published online by Cambridge University Press:  28 February 2011

K. C. Chen ,
A. Janah  and
J. D. Mackenzie
K. C. Chen
Affiliation:
Department of Materials Science and Engineering, University of California, Los Angeles, CA 90024
A. Janah
Affiliation:
Department of Materials Science and Engineering, University of California, Los Angeles, CA 90024
J. D. Mackenzie
Affiliation:
Department of Materials Science and Engineering, University of California, Los Angeles, CA 90024
Get access

Abstract

Ferroelectric lead zirconate titanate and ferrimagnetic nickel ferrite films were prepared by dip-coating of metal organic solutions. In the amorphous state, both films were porous, with specific porous surface areas on the order of tens of square meters. Crystallization temperatures were in the range of 400–500°C. The crystallization kinetics of the porous films and powders of both compounds have been studied by using non-isothermal DSC and isothermal XRD. The kinetic parameters were empirically described by the Johnson-Mehl-Avrami transformation equation α = 1- exp(−Ktn). The order of reaction (n) of PZT film is approximately 1 but that of the powder is 2, and their activation energies are 80 and 70 kcal/mole, respectively. It was found that the PZT film crystallizes more easily than the powder at the same temperature. The nickel ferrite film and powder, on the other hand, have similar n values ranging from 0.6 to 0.7, with activation energies of 20 and 35 kcal/mole, respectively. The possible mechanisms were also briefly discussed.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 73: Symposium H – Better Ceramics Through Chemistry II , 1986 , 731
Copyright
Copyright © Materials Research Society 1986

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Lipeles, R.A., Ives, N.A. and Leung, M.S., private communication.Google Scholar
2. Fukushima, J., Kodaira, K. and Matsushita, T., J. Mater. Sci. 19 595–598 (1984).Google Scholar
3. Budd, K.D., Dey, S.K. and Payne, D.A., Am. Ceram. Soc. Annual Meeting, May 1985, Cincinnati, Ohio.Google Scholar
4. Suwa, K., Hirano, S., Itozawa, K. and Naka, S., Proc. International Conf. on Ferrite, 1980, Japan, 23–26.Google Scholar
5. Sakharov, V.V., Savenko, V.G., Nurgalieva, A.A. and Petrov, K.I., Russian Journal of Inorg. Chem., 26 (9) 1251–1255 (1981).Google Scholar
6. Gurkovich, S.R. and Blum, J.B., Ferroelectrics, Vol.62 189–194 (1985).CrossRefGoogle Scholar
7. Rao, V.S., Rajendran, S. and Maiti, H.S., J. Mat. Sci., 19 3593 (1984).Google Scholar
8. Shaikh, A.S. and Vest, G.M., Am. Ceram. Soc. Annual Meeting, May 1985, Cincinnati, Ohio.Google Scholar
9. Fine, M.E., Introduction to Phase Transformation in Condensed Systems, McMillan Co., 542, New York (1963).Google Scholar
10. Augis, J.A. and Bennett, J.D., J. Thermal Anal., 13 283 (1978).CrossRefGoogle Scholar
11. Kissinger, H.E., J. Res. Nat. Bur. Stds., 57 (1956) 217; Anal. Chem. 29 (1957) 1702.Google Scholar
12. Ozawa, T., J. Thermal Anal., 2 (1970) 301; Polymer 12 150 (1971).Google Scholar
13. Lyubimov, A.P., Kalashnikov, A.A. and Nuriddinov, B., Dokl. Akad. Nauk Uzb SSSR, 29 5 (1972) 24–26.Google Scholar
14. Eguchi, E. and Kajima, K., Trans. Japan Inst. Met., 13 (1972) 45.Google Scholar
15. Kenesha, F.J. and Douglass, D.L., Oxid. Metals, 3 (1971) 1.Google Scholar
16. Kumagai, M. and Messing, G.L., J. Am. Ceram. Soc., 68 [9] 500 (1985).Google Scholar
17. Christian, J.W., Transformation in Metals and Alloys, Part I, 2nd Ed., Pergamon Press, N.Y. (1975) 542.Google Scholar
18. Weinberg, M.C., J. Non-cryst. Solids, 72 (1985) 301–314.CrossRefGoogle Scholar
19. Eissa, N.A. and Bhagat, A.A., J. Am. Ceram. Soc., 59 (1976) 7–8.CrossRefGoogle Scholar
20. Maxima, G. and Craus, M.L., Rev. Roum. Phys., 16 [6] (1971) 655–657.Google Scholar
21. O';Brien, H. M. and DiMarcello, F.V., J. Am. Ceram. Soc., 53 [7] (1970) 413.Google Scholar
22. Chang, R.H. and Wagner, J.B., J. Am. Ceram. Soc. 55 [4] (1972) 211.Google Scholar