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Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK)

Changsha,China,10.16-10.18,2010

ISBN: 978-1-935068-41-9 Scientific Research Publishing, USA

E-Book 2313pp Pub. Date: October 2010

Category: Chemistry & Materials Science

Price: $360

Title: Stearic Acid Sol-gel Synthesis and Characterization of Ytype Hexaferrite
Source: Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK) (pp 269-273)
Author(s): Chun-xiang Zhang, Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, Nanjing University of Science and Technology,
Xu-jie Yang, Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, Nanjing University of Science and Technology,
Abstract: Y-type hexagonal ferrite with composition Ba2Co2-xZnxFe12O22 was synthesized by a stearic acid sol-gel method using inorganic metal salts as raw materials and stearic acid as dispersant agent and solvent. The effects of calcination temperature and Zn2+ concentration on the crystal structure and frequency properties were studied. The crystallization behavior, structure and frequency properties were characterized by TG-DTA, XRD, FT-IR and impedance analyzer. The results indicate that the formation of single phase Ytype hexagonal ferrites can be achieved at a relatively low temperature 1000℃. The Zn2+ substitution for Co2+ results in the expansion of crystal lattice. Intermediate BaCO3 can improve the stability of γ-Fe2O3. The resonance peaks shift towards lower frequency and the real part of permeability increases with the decrease of the internal stress and magnetic anisotropy resulting from the increase of calcination temperature.
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