Cho, In-Sun Kim, Jeong-Ryeol Kim, Dong Wook Kim, Dong-Wan Hong, Kug Sun 2024-01-21T01:31:35Z 2024-01-21T01:31:35Z 2021-09-05 2007-03 0955-2219 https://pubs.kist.re.kr/handle/201004/134608 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. (C) 2007 Published by Elsevier Ltd. English ELSEVIER SCI LTD HIGH PERMITTIVITY COMPOUND Microwave dielectric properties and Far-infrared spectroscopic analysis of Ba5+nTinNb4O15+3n (0.3 < n < 1.2) ceramics Article 10.1016/j.jeurceramsoc.2006.11.030 1 JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, v.27, no.8-9, pp.3081 - 3086 JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 27 8-9 3081 3086 scie scopus 000246331700064 2-s2.0-34047154462 Materials Science, Ceramics Materials Science Article; Proceedings Paper HIGH PERMITTIVITY COMPOUND dielectric properties spectroscopy Kramers-Kronig method niobates