Skip to main content Accessibility help
×
Home

Fabrication and Characterization of Colossal Dielectric Response of Polycrystalline Ca1-x Sr x Cu3Ti4O12 (0≤x≤1) Ceramics

  • Sung Yun Lee (a1), Duk-Keun Yoo (a1), Jihye Lee (a2), William Jo (a2), Youn-Woo Hong (a3), Young-Hwan Kim (a4) and Sang-Im Yoo (a1)...

Abstract

We report the microstructures and dielectric properties of Ca1-x Sr x Cu3Ti4O12 (C1-x S x CTO, 0≤x≤1) ceramics sintered at the various sintering temperatures ranging from 1000 to 1060˚C in air. The linear increase in lattice parameter in C1-x S x CTO (0≤x≤1) ceramics is observable for the full range of substitution. However, the second phases of SrTiO3 and CuO start to occur from the composition of x=0.8, implying that a stoichiometric SrCu3Ti4O12 (SCTO) compound may not exist. While the C0.6S0.4CTO and C0.4S0.6CTiO samples exhibit relatively lower dielectric constant (εr ) of ∼40,000 below 1 kHz, the CaCu3Ti4O12 (CCTO) and SCTO show the extremely high εr values of ~120,000 and ∼180,000, respectively. Complex impedance (Z*) and modulus (M*) spectroscopy revealed that the capacitance (C) and resistivity (ρ) values of grain boundary in all samples are much higher than those of grains.

Copyright

References

Hide All
1. Subramanian, M. A., Li, Dong., Duan, N., Reisner, B. A. and Sleight, A. W., J. Solid State Chem. 151, 323 (2000).
2. Amaral, F., Costa, L. C. and Valente, M. A., J. Non-Cryst Solids. 357, 775 (2011).
3. Li, M., Cai, G., Zhang, D. F., Wang, W. Y., Wang, W. J. and Chen, X. L., J. Appl. Phys. 104, 074107 (2008).
4. Feng, L., Tang, X., Yan, Y., Chen, X., Jiao, Z. and Cao, G., Phys. Stat. Sol. (a), 203, R22 (2006).
5. Xue, H., Guan, X., Yu, R. and Xiong, Z., J. Alloy. Compd. 482, L14 (2009).
6. Schmidt, R., and Sinclair, D. C., Chem. Mater. 22, 6 (2010).
7. Li, J., Subramanian, M. A., Rosenfeld, H. D., Jones, C. Y., Toby, B. H., and Sleight, A. W., Chem. Mater. 16, 5223 (2004).
8. Werner, P. E., Eriksson, L. and Westdahl, M., J. Appl. Cryst. 18, 367 (1985).
9. Li, J., Subramanian, M. A., Rosenfeld, H. D., Jones, C. Y., Toby, B. H., and Sleight, A. W., Chem. Mater. 16, 5223 (2004).
10. Lee, S. Y., Yoo, D. K. and Yoo, S. I., Electron. Mater. Lett. 3, 23 (2007).
11. Lee, S. Y., Hong, Y. W. and Yoo, S. I., Electron. Mater. Lett. 7, 287 (2011).
12. Adams, T. B., Sinclair, D. C. and West, A. R., Adv. Mater. 14, 1321 (2002).
13. Adams, T. B., Sinclair, D. C. and West, A. R., J. Am. Ceram. Soc. 89, 3129 (2006).
14. Adams, T. B., Sinclair, D. C. and West, A. R., Phys. Rev. B. 73, 094124 (2006).
15. Shao, S. F., Zhang, J. L., Zheng, P., Zhong, W. L. and Wang, C. L., J. Appl. Phys. 99, 084106 (2006).
16. Sinclair, D. C. and West, A. R., J. Appl. Phys. 66, 3850 (1989).

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed