Title :
Electrical and dielectric properties of xNi0.53Cu0.12Zn0.35Fe1.88O4 + (1−x) BaTiO3 nanocomposites
Author :
Bharadwaj, S. ; Ramesh, T. ; Sadhana, K. ; Murthy, S.R.
Author_Institution :
Dept. of Phys., Osmania Univ., Hyderabad, India
Abstract :
The composite of xNi0.53Cu0.12Zn0.35Fe1.88O4+ (1-x)BaTiO3 were prepared by mixing nanocrystalline Ni0.53Cu0.12Zn0.35Fe1.88O4 and BaTiO3 powders at different weight percent.The powders were densified using microwave sintering method at 900°C/30 min. The phase and morphology\´ of the composites was observed with X-ray diffraction (XRD) and Scanning Electron Microscope (SEM). The frequency dependence of real (ε\´) and imaginary (ε") parts of permittivity was measured in the range of lMHz-1.8GHz. The values of ε\´ increases with an increase of BaTiO3 content at 1MHz. The experimental value of dielectric constant was compared with available theoretical models. The transition temperature (Tc) of composite materials decreases with an increase of BaTiO3 content.
Keywords :
X-ray diffraction; barium compounds; copper compounds; crystal morphology; densification; ferrites; ferroelectric materials; ferroelectric transitions; mixing; nanocomposites; nanofabrication; nanoparticles; nickel compounds; permittivity; scanning electron microscopy; sintering; zinc compounds; Ni0.53Cu0.12Zn0.35Fe1.88O4-BaTiO3; SEM; X-ray diffraction; XRD; densification; dielectric constant; dielectric properties; electrical properties; frequency 1 MHz to 1.8 GHz; microwave sintering; mixing; morphology; nanocomposites; nanocrystalline powders; permittivity; scanning electron microscopy; temperature 900 degC; time 30 min; transition temperature; Magnetic resonance; Nanocomposites; Composite materials; Dielectric properties; Nano crystalline materials;
Conference_Titel :
Nanoscience, Engineering and Technology (ICONSET), 2011 International Conference on
Conference_Location :
Chennai
Print_ISBN :
978-1-4673-0071-1
DOI :
10.1109/ICONSET.2011.6167946
