Microwave dielectric properties and structure of ZnO–Nb2O5–TiO2 ceramics

Autor:	N.F. Kartenko, Elizaveta Nenasheva, S. S. Redozubov, I. M. Gaidamaka
Rok vydání:	2011
Předmět:	Permittivity Materials science Scanning electron microscope Analytical chemistry Sintering Mineralogy Dielectric engineering.material Microstructure Rutile visual_art Materials Chemistry Ceramics and Composites engineering visual_art.visual_art_medium Ceramic Columbite
Zdroj:	Journal of the European Ceramic Society. 31:1097-1102
ISSN:	0955-2219
DOI:	10.1016/j.jeurceramsoc.2010.12.023
Popis:	Ceramic samples based on ZnO–Nb 2 O 5 –TiO 2 compositions have been prepared using solid state ceramic route. The work was carried out over a wide range of initial ZnNb 2 O 6 and Zn 0.17 Nb 0.33 Ti 0.5 O 2 compounds concentration. The crystal structure and microstructure developments were studied using X-ray diffraction (XRD) and scanning electron microscopy (SEM). It was shown that the phase compositions of the samples present itself a columbite type and mixture of two phases—solid solutions of columbite and rutile types.The sintering behavior, permittivity, its temperature coefficients and quality factor had been characterized for ceramic samples in depending on compositions. The permittivity of the samples in this system is within the limits from 24 to 80, τ ɛ from 150 to −560 ppm/°C. For the samples with τ ɛ ∼ 0, ɛ r ∼ 43.8 and Q · f = 35000 GHz at f = 9 GHz. The comparatively low sintering temperature (≤1080 °C) and high dielectric properties in microwave range make these ceramics promising for application in electronics.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::477654446c4c9f09b91ffad80a3bbdcf https://doi.org/10.1016/j.jeurceramsoc.2010.12.023 Zobrazit plný text záznamu Full Text from ScienceDirect