R&D result detail

Original Title

Structural, magnetic, elastic, dielectric and electrical properties of hot-press sintered Co1-xZnxFe2O4 (x=0.0, 0.5) spinel ferrite nanoparticles

English Title

Structural, magnetic, elastic, dielectric and electrical properties of hot-press sintered Co1-xZnxFe2O4 (x=0.0, 0.5) spinel ferrite nanoparticles

Type

WoS Article

Original Abstract

In this article, Co1-xZnxFe2O4(x = 0.0 and 0.5) disc-shaped pellets were formed by hot-press sintering of nanoparticles at temperature 925 degrees C for 10 min in vacuum atmosphere under 30 MPa mechanical pressure. X-ray diffraction study confirmed the formation of spinel cubic ferrite structure of hot-press sintered spinel ferrite Co1-xZnxFe2O4(x= 0.0 and 0.5) samples. The scanning electron microscopy image indicated that the growth and densification of smaller ferrite nanoparticles were higher than larger ferrite nanoparticles. Magnetic properties of sintered samples were investigated by the superconducting quantum interface device (SQUID) magnetometer at room temperature. The hot press sintered Co1-xZnxFe2O4(x = 0.0 and 0.5) pellet samples exhibited magnetic properties dependent on the grain size of spinel ferrite particles. The maximum saturation magnetization 82.47 emu/g was obtained for Co(0.5)Zn(0.5)Fe(2)O(4)hot press sintered sample of ball-milled ferrite particles. Further, the impact of grain size and density of sample on hardness, dielectric property and ac conductivity of hot-press sintered samples was investigated. In addition, the longitudinal wave velocity (V-l), transverse wave velocity (V-t), mean elastic wave velocity (V-m), bulk modulus (B), rigidity modulus (G), Young's modulus (E), Poisson ratio (sigma) and Debye temperature (theta(D)) were calculated. The elastic moduli of hot press sintered ferrite samples were corrected to zero porosity using Hosselman and Fulrath model.

English abstract

In this article, Co1-xZnxFe2O4(x = 0.0 and 0.5) disc-shaped pellets were formed by hot-press sintering of nanoparticles at temperature 925 degrees C for 10 min in vacuum atmosphere under 30 MPa mechanical pressure. X-ray diffraction study confirmed the formation of spinel cubic ferrite structure of hot-press sintered spinel ferrite Co1-xZnxFe2O4(x= 0.0 and 0.5) samples. The scanning electron microscopy image indicated that the growth and densification of smaller ferrite nanoparticles were higher than larger ferrite nanoparticles. Magnetic properties of sintered samples were investigated by the superconducting quantum interface device (SQUID) magnetometer at room temperature. The hot press sintered Co1-xZnxFe2O4(x = 0.0 and 0.5) pellet samples exhibited magnetic properties dependent on the grain size of spinel ferrite particles. The maximum saturation magnetization 82.47 emu/g was obtained for Co(0.5)Zn(0.5)Fe(2)O(4)hot press sintered sample of ball-milled ferrite particles. Further, the impact of grain size and density of sample on hardness, dielectric property and ac conductivity of hot-press sintered samples was investigated. In addition, the longitudinal wave velocity (V-l), transverse wave velocity (V-t), mean elastic wave velocity (V-m), bulk modulus (B), rigidity modulus (G), Young's modulus (E), Poisson ratio (sigma) and Debye temperature (theta(D)) were calculated. The elastic moduli of hot press sintered ferrite samples were corrected to zero porosity using Hosselman and Fulrath model.

Keywords

Hot-press sintering; Spinel ferrite; Nanoparticles; Magnetic properties

Key words in English

Hot-press sintering; Spinel ferrite; Nanoparticles; Magnetic properties

Authors

YADAV, R.; KUŘITKA, I.; HAVLICA, J.; HNATKO, M.; CIGÁŇ, A.; MÁSILKO, J.; KALINA, L.; MONČEKOVÁ, M.; RUSNAK, J.; ENEV, V.

RIV year

2018

Released

01.02.2018

Publisher

ELSEVIER SCIENCE

Location

AMSTERDAM, NETHERLANDS

ISBN

0304-8853

Periodical

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

Number

447

State

Kingdom of the Netherlands

Pages from

48

Pages to

57

Pages count

10

BibTex

@article{BUT141512,
  author="Raghvendra Singh {Yadav} and Ivo {Kuřitka} and Jaromír {Havlica} and Miroslav {Hnatko} and Alexander {Cigáň} and Jiří {Másilko} and Lukáš {Kalina} and Miroslava {Mončeková} and Jaroslav {Rusnak} and Vojtěch {Enev}",
  title="Structural, magnetic, elastic, dielectric and electrical properties of hot-press sintered Co1-xZnxFe2O4 (x=0.0, 0.5) spinel ferrite nanoparticles",
  journal="JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS",
  year="2018",
  number="447",
  pages="48--57",
  doi="10.1016/j.jmmm.2017.09.033",
  issn="0304-8853"
}