Microwave dielectric properties and Far-infrared spectroscopic analysis of Ba5+nTinNb4O15+3n (0.3 < n < 1.2) ceramics

作者：Cho In Sun; Kim Jeong Ryeol; Kim Dong Wook; Kim Dong Wan; Hong Kug Sun^*

来源：Journal of the European Ceramic Society, 2007, 27(8-9): 3081-3086.

DOI：10.1016/j.jeurceramsoc.2006.11.030

• dielectric properties
• spectroscopy
• Kramers-Kronig method
• niobates

Ba5+nTinNb4O15+3n ceramics (0.3 < n < 1.2) with a cation deficient hexagonal perovskite related structure were prepared by a conventional solid- reaction method. The crystal structure and microstructure were investigated by X-ray powder diffraction (XRD) and field emission scanning electron microscope (FE-SEM), respectively. The microwave dielectric properties were measured using a network analyzer. The dielectric constant (epsilon(r)) and the temperature coefficient of resonant frequency (tau(f)) were increased and the quality factor (Q x f) was decreased with increasing in the n value. The effect of the crystal structure on the microwave dielectric properties was also investigated. The FT-IR reflection spectra were obtained and analyzed using a Kramers-Kronig relation.

• 出版日期2007