Effect of Sintering Behaviors on Microwave Dielectric Properties of (Ca_0.3Sr_0.1)Sm_0.4TiO₃ Ceramics

Abstract:

The microstructure and dielectric properties of the (Ca_0.3Sr_0.1)Sm_0.4TiO₃ ceramics with various sintering conditions have been investigated. The compounds were prepared by the conventional solid-state route with various sintering temperatures from 1340 to 1400°C and sintering duration from 3 h. The resultant microwave dielectric properties were analyzed based upon the densification, the X-ray diffraction patterns and the microstructures of the ceramics. The correlation between the microstructures, the microwave dielectric properties and sintering behaviors was also examined. The ε_r value of 96.7 and Q×f value of 11,600 GHz were obtained for (Ca_0.3Sr_0.1)Sm_0.4TiO₃ ceramics sintering at 1370°C for 3 h. The (Ca_0.3Sr_0.1)Sm_0.4TiO₃ ceramics had suitable dielectric properties can find applications in microwave devices such as resonator, filter and antenna.

• Periodical: Key Engineering Materials (Volumes 602-603)
• Pages: 738-741
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.602-603.738
• Online since: March 2014
• Authors: Cheng Hsing Hsu*, Shang Hung Tsai, Wen Shiush Chen, Chun Hung Lai, Jenn Sen Lin
• Keywords: (Ca_0.3Sr_0.1)Sm_0.4TiO₃ Ceramics, Microstructure, Microwave Dielectric Properties

References

[1] W.S. Kim, E.S. Kim, K.H. Yoon, Effects of Sm3+ Substitution on Dielectric Properties of Ca1−xSm2x/3TiO3 Ceramics at Microwave Frequencies, J. Am. Ceram. Soc. 82 (1999) 2111-2115.

DOI: 10.1111/j.1151-2916.1999.tb02049.x

[2] K.H. Yoon, W.S. Kim, E.S. Kim, Dependence of the octahedral bond valence on microwave dielectric properties of Ca1−xSm2x/3TiO3 ceramics, Mater. Sci. Eng. B 99 (2003) 112-115.

DOI: 10.1016/s0921-5107(02)00431-2

[3] C.L. Huang, C.H. Shen, Phase Evolution and Dielectric Properties of (Mg0. 95M0. 052+)Ti2O5 (M2+=Co, Ni, and Zn) Ceramics at Microwave Frequencies, J. Am. Ceram. Soc. 92 (2009) 384-388.

[4] P.L. Wise, I.M. Reaney, W.E. Lee, Proce TJ, Iddles DM, Cannell DS. Structure–microwave property relations in (SrxCa(1−x)n+1TinO3n+1, J. Eur. Ceram. Soc. 21 (2001) 1723-1726.

DOI: 10.1016/s0955-2219(01)00102-9

[5] J. Pei, Z.X. Yue, F. Zhao, Z.L. Gui, L.T. Li, Microwave dielectric ceramics of hexagonal (Ba1−xAx)La4Ti4O15 (A = Sr, Ca) for base station applications, J. Alloys Compd. 459 (2008) 390–394.

DOI: 10.1016/j.jallcom.2007.04.274

[6] N. Lamrani, B. Itaalit, S. Marinel, M. Aliouat, Influence of strontium substitution on the dielectric properties of Ca(1 − x)SrxTi0. 9Zr0. 1O3 solid solutions, Mater. Lett. 65 (2001) 346-349.

DOI: 10.1016/j.matlet.2010.09.065

[7] W.E. Courtney, Analysis and Evaluation of a Method of Measuring the Complex Permittivity and Permeability Microwave Insulators, IEEE Trans. Microwave Theory Tech. 18 (1970) 476-485.

DOI: 10.1109/tmtt.1970.1127271

[8] B.W. Hakki, P.D. Coleman, A Dielectric Resonator Method of Measuring Inductive Capacities in the Millimeter Range, IEEE Trans. Microwave Theory Tech. 8 (1960) 402-410.

DOI: 10.1109/tmtt.1960.1124749

[9] B.D. Silverman, Microwave Absorption in Cubic Strontium Titanate, Phys. Rev. 125 (1962) 1921-(1930).

DOI: 10.1103/physrev.125.1921