Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-28T00:26:37.172Z Has data issue: false hasContentIssue false
  • English
  • Français

Microwave sintering of ZnO at ultra high heating rates

Published online by Cambridge University Press:  31 January 2011

Geng-fu Xu ,
Isabel K. Lloyd ,
Yuval Carmel ,
Tayo Olorunyolemi  and
Otto C. Wilson Jr
Geng-fu Xu
Affiliation:
Department of Materials and Nuclear Engineering, University of Maryland, College Park, Maryland 20742
Isabel K. Lloyd
Affiliation:
Department of Materials and Nuclear Engineering, and Institute for Plasma Research, University of Maryland, College Park, Maryland 20742
Yuval Carmel
Affiliation:
Institute for Plasma Research, University of Maryland, College Park, Maryland 20742
Tayo Olorunyolemi
Affiliation:
Institute for Plasma Research, University of Maryland, College Park, Maryland 20742
Otto C. Wilson Jr
Affiliation:
Department of Materials and Nuclear Engineering, and Institute for Plasma Research, University of Maryland, College Park, Maryland 20742
Get access

Abstract

In this paper, a unique processing approach for producing a tailored, externally controlled microstructure in zinc oxide using very high heating rates (to 4900 °C/min) in a microwave environment is discussed. Detailed data on the densification, grain growth, and grain size uniformity as a function of heating rate are presented. With increasing heating rate, the grain size decreased while grain size uniformity increased. At extremely high heating rates, high density can be achieved with almost complete suppression of grain growth. Ultrarapid microwave heating of ZnO also enhanced densification rates by up to 4 orders of magnitude compared to slow microwave heating. The results indicate that the densification mechanisms are different for slow and rapid heating rates. Since the mechanical, thermal, dielectric, and optical properties of ceramics depend on microstructure, ultrarapid heating may lead to advanced ceramics with tailored microstructure and enhanced properties.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 10 , October 2001 , pp. 2850 - 2858
Copyright
Copyright © Materials Research Society 2001

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

1Brook, R.J., Proc. Br. Ceram. Soc. 32, 7 (1982).Google Scholar
2Baumgartner, C.E., J. Am. Ceram. Soc. 71, C–350 (1988).Google Scholar
3Harmer, M.P., Roberts, E.W., and Brook, R.J., Trans. J. Br. Ceram. Soc. 78, 22 (1979).Google Scholar
4Kim, D-H. and Kim, C.H., J. Am. Ceram. Soc. 76, 1877 (1993).CrossRefGoogle Scholar
5Johnson, D.L., in Materials Science Research, edited by Kuczynski, G.C., Miller, A.E., and Sargent, G.A. (Plenum Press, New York, 1984), Vol. 16, p. 243.Google Scholar
6García, D.E., Seidal, J., Janssen, R., and Claussen, N., J. Eur. Ceram. Soc. 15, 935 (1995).CrossRefGoogle Scholar
7Morrel, A. and Hermosin, A., Am. Ceram. Soc. Bull. 59, 626 (1980).Google Scholar
8Chen, D-J. and Mayo, M.J., J. Am. Ceram. Soc. 79, 906 (1996).Google Scholar
9Sutton, W.H., Am. Ceram. Soc. Bull. 68, 376 (1989).Google Scholar
10Clark, D.E., Folz, D.E., Shultz, R.L., Fathi, Z., and Cozzi, A.D., MRS Bull. 18, 41 (1993).CrossRefGoogle Scholar
11Janney, M.A. and Kimery, H.D., in Microwaving Processing of Materials II, edited by Snyder, W.B. Jr., Sutton, W.H., Iskander, M.F., and Johnson, D.L. (Mater. Res. Soc. Synap. Proc. 189, Pittsburgh, PA, 1991), pp. 215–217.Google Scholar
12Willert-Porada, M., Fischer, B., and Gerdes, T., in Microwaves: Theory and Application in Materials Processing II, Ceramic Transactions. Vol. 36, edited by Clark, D.E., Tinga, W.R., andGoogle Scholar
13Laia, J.R. Jr. (Am. Ceram. Soc., Westerville, OH, 1993), pp. 365–371.Google Scholar
14Birnboim, A. and Carmel, Y., J. Am. Ceram. Soc. 82, 3024 (1999).CrossRefGoogle Scholar
15Lynn Johnson, D., in Microwaves: Theory and Application in Materials Processing, Ceramic Transactions, Vol. 21, edited by Clark, D.E., Gac, F.D., and Sutton, W.H. (Am. Ceram. Soc., Westerville, OH, 1991), pp. 17–28.Google Scholar
16De, A., Ahmad, I., Dow Whitney, E., and Clark, D.E., in Microwaves: Theory and Application in Materials Processing, Ceramic Transactions, Vol. 21, edited by Clark, D.E., Gac, F.D., andGoogle Scholar
17Sutton, W.H. (Am. Ceram. Soc., Westerville, OH, 1991), pp. 319–328.Google Scholar
18De, A., Ahmad, I., Whitney, E.D., and Clark, D.E., in Microwaves: Theory and Application in Materials Processing, Ceramic Transactions, Vol. 21, edited by Clark, D.E., Gac, F.D., and Sutton, W.H. (Am. Ceram. Soc., Westerville, OH, 1991), pp. 329–339.Google Scholar
19Fang, Y., Agramal, D.K., Roy, D.M., and Roy, R., Microwaves: Theory and Application in Materials Processing, Ceramic Transactions, Vol. 21, edited by Clark, D.E., Gac, F.D., and Sutton, W.H. (Am. Ceram. Soc., Westerville, OH, 1991), pp. 349–356.Google Scholar
20Pert, E., Carmel, Y., Birnboim, A., Olorunyolemi, T., Gershon, D., Calame, J., Lloyd, I., and Wilson, O., J. Am. Ceram. Soc. (2001, in press).Google Scholar
19Olorunyolemi, T., Tolbert, R., Wilson, O. Jr., Carmel, Y., Lloyd, I., Xu, G., and Jaworski, A., J. Am. Ceram Soc. 83, 974 (2000).Google Scholar
20Mendelson, M.I., J. Am. Ceram. Soc., 52, 443 (1969).Google Scholar
21Tian, Y.L., Feng, J.H., Sun, L.C., and Tu, C.J., in Microwave Processing of Materials III, edited by Beatty, R.L., Sutton, W.H., and Iskander, M.F. (Mater. Res. Soc. Symp. Proc. 269, Pittsburgh, PA, 1992), pp. 41–46.Google Scholar
22Dadon, D., Martin, L.P., Rosen, M., Birman, A., Gershon, D., Calame, J.P., Levush, B., and Carmel, Y., J. Mater. Synth. Process. 4, 95 (1996).Google Scholar
23Chu, M-Y., Rahaman, M.N., De Jonghe, L.C., and Brook, R.J., J. Am. Ceram. Soc. 74, 1217 (1991).Google Scholar
24Demartin, M., Hérard, C., Carry, C., and Lemâtre, J., J. Am. Ceram. Soc. 80, 1079 (1997).CrossRefGoogle Scholar
25Coble, R.L., J. Appl. Phy. 32, 787 (1962).Google Scholar
26Zhao, J. and Harmer, M.P., J. Am. Ceram. Soc. 75, 830 (1992).Google Scholar
27Lellett, B.J. and Lange, F.F., J. Am. Ceram. Soc. 72, 725 (1989).Google Scholar
28Lange, F.F. and Kellet, B.J., J. Am. Ceram. Soc. 72, 735 (1989).Google Scholar
29Greskovich, C. and Lay, K.W., J. Am. Ceram. Soc. 55, 142 (1972).Google Scholar
30Gupta, T.K. and Coble, R.L., J. Am. Ceram. Soc. 51, 521 (1968).Google Scholar
31Dutta, S.K. and Spriggs, R.M., Mater. Res. Bull. 4, 797 (1969).CrossRefGoogle Scholar