Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-23T11:13:14.926Z Has data issue: false hasContentIssue false
  • English
  • Français

Effects of heating rate on sintering of alkoxide-derived BaTi5O11 powder

Published online by Cambridge University Press:  29 June 2016

Toshimi Fukui ,
Chihiro Sakurai  and
Masahiko Okuyama
Toshimi Fukui
Affiliation:
Colloid Research Institute, 350-1 Ogura, Yahata-higashi-ku, Kitakyushu 805, Japan
Chihiro Sakurai
Affiliation:
Colloid Research Institute, 350-1 Ogura, Yahata-higashi-ku, Kitakyushu 805, Japan
Masahiko Okuyama
Affiliation:
Colloid Research Institute, 350-1 Ogura, Yahata-higashi-ku, Kitakyushu 805, Japan
Get access

Abstract

The effects of heating rate on the sintering of BaTi5O11 ceramics from an alkoxide-derived powder were investigated, and the microwave properties were measured. Density and the crystalline phase of the sintered bodies varied with heating rate. Density increased with an increase in heating rate up to 30 °C/min and decreased at one exceeding 30 °C/min. BaTi5O11 ceramics with >99% theoretical density were obtained by sintering at 1120 °C for 48 h with a heating rate at 30 °C/min. The sintering with a heating rate at 100 °C/min resulted in a decomposition of BaTi5O11 to Ba2Ti9O20 and rutile that hindered sintering. The dielectric constant εr and Q volume, neither sensitive to microstructure or the crystalline phase, were 42 and ca. 6100 at 9.7 GHz, respectively. The temperature coefficient of resonant frequency τf was 39.3 ppm/°C at 7 GHz.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 1 , January 1992 , pp. 192 - 196
Copyright
Copyright © Materials Research Society 1992

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.O'Bryan, H. M. Jr., Thomason, J. Jr., and Plourde, J.K., J. Am. Ceram. Soc. 57, 450–453 (1974).Google Scholar
2.Plourde, J.K., Linn, D.F., O'Bryan, H.M. Jr., and Thomason, J. Jr., J. Am. Ceram. Soc. 58, 418–420 (1975).Google Scholar
3.Nomura, S., Tomaya, K., and Kaneta, K., Jpn. J. Appl. Phys. 22, 1125–1128 (1983).Google Scholar
4.Suwa, Y., Sugimoto, Y., and Naka, S., J. Jpn. Soc. Powder Powder Metall. 25, 164–167 (1978).CrossRefGoogle Scholar
5.Ritter, J. J., Roth, R. S., and Blendell, J. E., J. Am. Ceram. Soc. 69, 155–162 (1986).Google Scholar
6.Hirano, S. and Otsuka, J., Preprint of Annual Meeting of Am. Ceram. Soc., Indianapolis, IN (1989).Google Scholar
7.Hiuga, T., Takada, K., Matsumoto, K., and Ichimura, H., Proc. Int. Symp. & Exhibition on Science and Technology of Sintering, Tokyo, 88–89 (1987).Google Scholar
8.Ikuma, Y., Harada, Y., and Hiuga, T., Proc. Jpn. Ceram. Soc. Symp., Kanazawa, 472–473 (1990).Google Scholar
9.Harmer, M.P. and Brook, R.J., J. Br. Ceram. Soc. 80, 147–148 (1981).Google Scholar
10.Kobayashi, Y. and Katoh, M., IEEE Trans. Microwave Theory Tech. 33, 586–592 (1985).Google Scholar
11.Hakki, B.W. and Coleman, P. D., IRE Trans., Microwave Theory Tech. 8, 402–410 (1960).Google Scholar
12.Mostaghci, H. and Brook, R.J., J. Br. Ceram. Soc. 80, 148–149 (1981).Google Scholar
13.Mostaghci, H. and Brook, R.J., Trans. Br. Ceram. Soc. 82, 167–170 (1983).Google Scholar
14.Hirano, S., Yokouchi, K., Arai, M., and Naka, S., Adv. Ceram. 19, 139–146 (1987).Google Scholar
15.Ouchi, H., Electron. Ceram. (in Jpn.) 19, 9–19 (1983).Google Scholar