4.6 Article

Fabrication of textured CoFe2O4 ceramics by a novel RTGG method using rod-like α-FeOOH particles as templates

Journal

MATERIALS CHEMISTRY AND PHYSICS
Volume 162, Issue -, Pages 380-385

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2015.06.002

Keywords

Magnetic materials; Sintering; Microstructure; Magnetic properties

Funding

  1. Natural Science Foundation of Jiangsu Province in China [BK20140517]
  2. University Natural Science Project of Jiangsu Province in China [14KJB430011]

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A textured CoFe2O4 ceramic was fabricated by reactive template grain growth (RTGG) method using rodlike alpha-FeOOH particles as templates. The template particles were synthesized by hydrothermal method, the particles showed good crystallization and rod-like shape with a diameter of 0.1-0.2 mu m and an aspect ratio of 20-50. (110) oriented CoFe2O4 ceramic was obtained after a sintering process. The ceramic sintered at 1150 degrees C for 4 h showed dense and oriented structure with orientation degree of 0.89. Different magnetic hysteresis loops were observed along the in-plane and out-of-plane direction of the textured CoFe2O4, which was due to anisotropy properties of the sample. The textured ceramic exhibited an in-plane M-s enhancement (355 emu/cm(3)) compared to that of the non-textured ceramics (320 emu/cm(3)) in the same sintering conditions. (C) 2015 Elsevier B.V. All rights reserved.

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