Structural and dielectric properties of cobalt-copper ferrite/barium-strontium titanate composites

Author

Wu, Jian-gong ; Li, Quan-lu ; Xin, Hui ; Wang, Peng-fei ; Wang, Yong

Author_Institution

Sch. of Phys. & Inf. Technol., Shaanxi Normal Univ., Xian

fYear

2008

fDate

5-8 Dec. 2008

Firstpage

483

Lastpage

487

Abstract

Ferromagnetic Co_0.5Cu_0.5Fe₂O₄ and ferroelectric Ba_0.8Sr_0.2TiO₃ composite ceramics, xCo_0.5Cu_0.5Fe₂O₄ + (1-x)Ba_0.8Sr_0.2TiO₃ for x = 0.15, 0.3 and 0.45, were prepared by a conventional solid-state reaction method. The crystalline phases of the sintered samples were studied by the X-ray diffraction technique. Scanning electron microscopy (SEM) micrographs were taken to understand the microstructure of the samples. Variation of dielectric constant and loss tangent were determined with temperature (room temperature to 600degC) at different test frequencies (in the range 100 Hz-1 MHz). The maximum value of dielectric constant was observed for composite with 0.45 ferrite + 0.55 ferroelectric phase.

Keywords

X-ray diffraction; barium compounds; ceramics; cobalt compounds; composite materials; copper compounds; crystal microstructure; dielectric losses; ferroelectric materials; ferromagnetic materials; permittivity; scanning electron microscopy; sintering; strontium compounds; Co_0.5Cu_0.5Fe₂O₄-Ba_0.8Sr_0.2TiO₃; X-ray diffraction; barium-strontium titanate; cobalt-copper ferrite; composite ceramics; composite material; conventional solid-state reaction method; crystalline phases; dielectric constant; dielectric loss tangent; ferroelectric material; ferromagnetic material; frequency 100 Hz to 1 MHz; microstructure; scanning electron microscopy micrographs; sintering; temperature 293 K to 873 K; Ceramics; Dielectric constant; Ferrites; Ferroelectric materials; Iron; Scanning electron microscopy; Solid state circuits; Strontium; Temperature distribution; Titanium compounds; Composite materials; X-ray diffraction; dielectric behavior; sintering;

fLanguage

English

Publisher

ieee

Conference_Titel

Piezoelectricity, Acoustic Waves, and Device Applications, 2008. SPAWDA 2008. Symposium on

Conference_Location

Nanjing

Print_ISBN

978-1-4244-2891-5

Type

conf

DOI

10.1109/SPAWDA.2008.4775836

Filename

4775836