Fabrication of New (Ba_0.97Ca_0.03)(Zr_0.94Sn_0.06)O₃ Ceramics by the Combustion Technique

Abstract

In this study, new (Ba_0.97Ca_0.03)(Zr_0.94Sn_0.06)O₃ BCZS ceramics were synthesized by the combustion technique using glycine as fuel. The powders and ceramics were calcined from 1,000 to 1,200 °C for 2 h and sintered from 1,500 to 1,675 °C for 2 h. A pure perovskite phase was found in the powder calcined at higher than 1,150 °C and the purity phase of the ceramics was detected in all samples. The average particle size and grain size increased approximately from 73 to 103 nm and from 0.51–1.61µm when firing temperatures increased. The calcined powders exhibited tight agglomerates at low calcination temperatures and they changed to loosely bound agglomerates at higher calcination temperatures. The densest ceramics were discovered in the samples sintered at 1,650 °C. The dielectric constant (ϵ_r) and loss factor (tan δ) values measured at 100 kHz of this sample were found to be 44 and 0.01, respectively at room temperature.

• Keywords BCZS ceramics
• combustion method
• microstructure
• dielectric
• crystal structure

Acknowledgments

The authors wish to thank the Department of Physics, Faculty of Science, Naresuan University for supporting facilities. I would like to thank Prof. Dr. Gobwute Rujijanagul for his help in making the dielectric property measurements. Acknowledgment also given to Mr. Don Hindle for his help in editing the manuscript.

Funding

This study was financially supported by Naresuan University.