Hostname: page-component-848d4c4894-75dct Total loading time: 0 Render date: 2024-05-27T02:26:04.927Z Has data issue: false hasContentIssue false
  • English
  • Français

Effect of Divalent Dopants on Properties of Ba3.75Nd9.5Ti18O54 Microwave Dielectric Resonators

Published online by Cambridge University Press:  15 February 2011

R. Ubic ,
I. M. Reaney ,
W. E. Lee ,
J. Samuels  and
E. Evangelinost
R. Ubic
Affiliation:
Department of Engineering Materials, The University of Sheffield, Hadfield Bldg, Mappin Street, Sheffield SI 3JD (United Kingdom)
I. M. Reaney
Affiliation:
Department of Engineering Materials, The University of Sheffield, Hadfield Bldg, Mappin Street, Sheffield SI 3JD (United Kingdom)
W. E. Lee
Affiliation:
Department of Engineering Materials, The University of Sheffield, Hadfield Bldg, Mappin Street, Sheffield SI 3JD (United Kingdom)
J. Samuels
Affiliation:
Morgan Matroc Ltd. Unilator Division, Vauxhall Industrial Estate, Ruabon, Wrexham, Clwyd LL14 6HY (United Kingdom)
E. Evangelinost
Affiliation:
Morgan Matroc Ltd. Unilator Division, Vauxhall Industrial Estate, Ruabon, Wrexham, Clwyd LL14 6HY (United Kingdom)
Get access

Abstract

Pellets in the ternary solid-solution Ba6–3xNd8+2xTi18O54 (x=0.75) have been processed to near theoretical density by mixed-oxide synthesis, and their dielectric properties determined to be εr≈89, Qf> 10,000, and τf≈+60ppm/°C at microwave frequencies. Similar ceramics with Ca, Sr, and Pb partially substituted for Ba were also processed and analysed. Both Ca and Sr were found to increase εr to 100–105 but significantly lower Qf and inflate τf. While Pb substitution also lowered Qf, it had no significant effect on εr and beneficially suppressed τf to values from -16 to +8ppm/°C, tunable with Pb content, strongly suggesting that these materials may be useful for commercial applications.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 453: Symposium R – Solid State Chemistry of Inorganic Materials , 1996 , 495
Copyright
Copyright © Materials Research Society 1997

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 Sun, J.-S., Wei, C.-C., and Wu, L., J. Mater. Sci. 27 [21], p. 5818–22 (1992).Google Scholar
2 Laffez, P., Desgardin, G., and Raveau, B., J. Mater. Sci. 30 [1], p. 267–273 (1995).Google Scholar
3 Ohsato, H., Kato, H., Mizuta, M., Nishigaki, S., and Okuda, T., Jap. J. Appl. Phys., Part 1 34 [9B], p. 5413–5417(1995).Google Scholar
4 Durand, J.M. and Boilot, J.P., J. Mater. Sci. Lett. 6, p. 134–36 (1987).Google Scholar
5 Valant, M., Suvorov, D., and Kolar, D., in Proceedings of the Fourth International Conference on Electronic Ceramics and Applications 1, (European Ceramic Society, 1994), p. 69–72.Google Scholar
6 Kolar, D., Gaberšček, S., Stadler, Z., and Suvorov, D., Ferroelectrics 27, p. 269–72 (1980).Google Scholar
7 Nishigaki, S., Kato, H., Yano, S., and Kamimura, R., Bull. Am. Ceram. Soc. 66 [9], p. 1405–10(1987).Google Scholar
8 Wu, J.-M. and Chang, M.-C., J. Am. Ceram. Soc. 73 [6], p. 1599–1605 (1990).Google Scholar
9 Wakino, K., Minai, K., and Tamura, H., J. Am. Ceram. Soc. 67 [4], p. 278–281 (1984).Google Scholar
10 Negas, T. and Davies, P.K. in Materials and Processes for Wireless Communications, edited by. Negas, T. and Ling, H., (Ceramic Transactions 53, Am. Ceram. Soc, Westerville, Ohio USA 1995), p. 179–96.Google Scholar
11 Itoh, T. and Rudokas, R., IEEE Trans. on Microwave Theory and Tech MTT–25 [1], p. 52–59(1977).Google Scholar
12 Ubic, R., Reaney, I.M., and Lee, W.E., to be published.Google Scholar
13 Matveeva, R.G., Varfolomeev, M.B., and Il'yushenko, L.S., Russ. J. Inorg. Chem. 29 [1], p. 17–19(1984).Google Scholar
14 Reaney, I.M., Colla, E.L., and Setter, N., Jap. J. Appl. Phys., Part 1 33 [7], p. 3984–3990 (1994).Google Scholar