Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5461443 | Journal of Alloys and Compounds | 2017 | 30 Pages |
Abstract
Phase formation, chemical structure and microwave (MW) dielectric behavior of A-site Ce-doped SrTiO3 ceramics sintered in close aluminum pipe have been investigated. Samples with x = 0.4 appeared cubic by X-ray diffraction (XRD) but exhibited splitting and superstructure reflections in the range of 0.45 â¤Â x â¤Â 0.6. X-ray photoelectron spectroscopy (XPS) analysis revealed the sample possesses mixed-valent states of Ti3+/Ti4+ upon oxygen vacancy formation. As the x value increases, the Q Ã f value increases slightly from 7569 to 22,682 GHz, but the temperature coefficient of resonant frequency (Ïf) decreases markedly from +372 to +5 ppm/°C. A novel combination of microwave dielectric properties: εr = 61, Q Ã f = 22,682 GHz and Ïf = +5 pmm/°C were achieved for composition Sr0.1Ce0.6TiO3 at 1300 °C for 3 h.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Burhan Ullah, Wen Lei, Zheng-Yu Zou, Xiao-Hong Wang, Wen-Zhong Lu,