Title :
Microwaves dielectric properties of Y3Fe5O12-CaCu3Ti4O12 composites
Author :
Sabóia, K. D A ; Girão, H.T. ; Sombra, A.S.B. ; Graça, M. P F ; Costa, L.C. ; Amaral, F. ; Valente, M.A.
Author_Institution :
Dept. de Fis., Univ. Fed. do, Brazil
fDate :
Oct. 29 2011-Nov. 1 2011
Abstract :
A study of the effect of the presence of Y3Fe5O12 (YIG) in the dielectric properties of the CaCu3Ti4O12 (CCTO) is presented. The samples were prepared by the solid state method. Mechanical alloying followed by the solid state procedure had been successfully used to produce powders of CCTO and YIG to be used in the composites. We also look at the effect of the grain size of the YIG and CCTO in the final properties of the composite. The samples were analyzed using X-Ray diffraction and scanning electron microscopy (SEM). Dielectric permittivity had been measured at 2.7 and 5.0 GHz, using the small perturbation theory.
Keywords :
X-ray diffraction; calcium alloys; composite materials; copper alloys; iron alloys; permittivity; perturbation theory; scanning electron microscopy; titanium alloys; yttrium alloys; SEM; XRD; Y3Fe5O12-CaCu3Ti4O12; composites; dielectric permittivity; frequency 2.7 GHz; frequency 5 GHz; grain size; mechanical alloying; microwaves dielectric properties; powders; scanning electron microscopy; small perturbation theory; solid state method; x-ray diffraction; Cavity resonators; Dielectric constant; Materials; Microwave devices; Permittivity; CaCu3Ti4O12; Composite; Y3Fe5O12; dielectric properties; microwave;
Conference_Titel :
Microwave & Optoelectronics Conference (IMOC), 2011 SBMO/IEEE MTT-S International
Conference_Location :
Natal
Print_ISBN :
978-1-4577-1662-1
DOI :
10.1109/IMOC.2011.6169310
