Hostname: page-component-78c5997874-t5tsf Total loading time: 0 Render date: 2024-11-16T16:58:08.800Z Has data issue: false hasContentIssue false
  • English
  • Français

Structure and dielectric properties of pyrochlore–fluorite biphase ceramics in the Bi2O3–ZnO–Nb2O5 system

Published online by Cambridge University Press:  31 January 2011

Hong Wang  and
Xi Yao
Hong Wang
Affiliation:
Electronic Materials Research Laboratory, Xi'an Jiaotong University, Xi'an 710049, China
Xi Yao
Affiliation:
Electronic Materials Research Laboratory, Xi'an Jiaotong University, Xi'an 710049, China
Get access

Abstract

The structure and dielectric properties of Bi2O3–ZnO–Nb2O5-based ceramics with pyrochlore–fluorite biphase structure were investigated. Mixed-sintered ceramics were prepared by two precalcined constituents in the system of x[Bi1.5Zn0.5(Zn0.5Nb1.5)O7]−(1 − x)Bi3/4Nb1/4O7/4 (0.05 ≤ x ≤ 0.35), where Bi1.5Zn0.5(Zn0.5Nb1.5)O7 is a cubic pyrochlore (α) and Bi3/4Nb1/4O7/4 is a defect cubic fluorite (F). The phase composition of the mixed-sintered ceramics were characterized as a biphasic structure with a distorted pyrochlore (β) and a fluorite (F) coexisting. The phase ratio of β pyrochlore and F fluorite is related to the chemical composition x. The dielectric properties of the ceramics gradually change with their structure.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 1 , January 2001 , pp. 83 - 87
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

REFERENCES

1.Safronov, G.M., Batag, V.N., Stepanyuk, T.V., and Fedorov, P.M., Russ. J. Inorg. Chem. (Engl. Transl.) 16, 460–61 (1971).Google Scholar
2.Cann, D.P., Randall, C.A., and Shrout, T.R., Solid State Commun. 100, 529–534 (1996).CrossRefGoogle Scholar
3.Li, B.R. and Mo, Y.H., Inorganic Dielectric Materials (in Chinese) (Shanghai Science and Technology Press, Shanghai, China, 1986), pp. 360–363.Google Scholar
4.Ling, H.C., Yan, M.F., and Rhodes, W.W., J. Mater. Res. 5, 1752 (1990).CrossRefGoogle Scholar
5.Hiroshi Kagata, Tatsuya Inoue, Junichi Kato, and Kameyarna, I.Jpn. J. Appl. Phy. 31, 3152 (1992).Google Scholar
6.Mergen, A. and Lee, W.E., Mater. Res. Bull. 32, 175 (1997).CrossRefGoogle Scholar
7.Valant, M. and Davies, P.K., J. Am. Ceram. Soc. 83, 147 (2000).CrossRefGoogle Scholar
8.Wang, H., Wang, X., and Yao, X., Ferroelectrics 195, 19 (1997).Google Scholar
9.Wang, H., Zhang, D., Wang, X., and Yao, X., J. Mater. Res. 14, 546 (1999).CrossRefGoogle Scholar
10.Wang, H., Wang, X., and Yao, X., Ferroelectrics 229, 95 (1999).Google Scholar
11.Wang, X., Wang, H., and Yao, X., J. Am. Ceram. Soc. 80, 2745 (1997).CrossRefGoogle Scholar
12.Zhou, W., Jefferson, D.A., and Thomas, J.M., Proc. R. Soc. London A 406, 173 (1986).Google Scholar
13.Wang, H., Ph.D. Thesis, Xi’an Jiaotong University (1998).Google Scholar
14.Kingery, W.D., Bowen, H.K., and Uhlmann, D.R., Introduction to Ceramics, 2nd ed. (John Wiley & Sons, Inc., New York, 1976).Google Scholar
15.Coelho, R., Physics of Dielectrics for the Engineer (Elsevier Scientific Publishing Co., New York, 1979).Google Scholar