Influence of zinc content on some properties of Ni–Zn ferrites

• Published in: Ceramics international 2002, Vol.28 (4), p.363-367
• Main Author: El-Sayed, A.M.
• Format: Article
• Language: English
• Subjects: A. Sintering; Applied sciences; B. Microstructure; Building materials. Ceramics. Glasses; Ceramic industries; Chemical industry and chemicals; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Domain effects, magnetization curves, and hysteresis; Electrotechnical and electronic ceramics; Exact sciences and technology; Magnetic properties and materials; Magnetization curves, hysteresis, Barkhausen and related effects; Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects; Materials science; Materials synthesis; materials processing; Methods of materials synthesis and materials processing; Ni–Zn ferrites; Nonmetallic ferromagnetic materials; Physics; Preparation; Studies of specific magnetic materials; Technical ceramics
• ISSN: 0272-8842; 1873-3956
• DOI: 10.1016/S0272-8842(01)00103-1

The chemical formula of the samples investigated is Ni 1− y Zn y Fe 2O 4, where y=0.1, 0.3, 0.5. 0.7 and 0.9. The specimens were prepared by the usual ceramic technology and sintered at 1250 °C in static air atmosphere. The influence of Zn content on the densification and microstructure characteristics of specimens was studied. X-ray diffraction and IR absorption spectra were used for analysing the compositions. It was found that the samples have spinel cubic structure and sintered to about 97–98% of the corresponding X-ray density. Exaggerated grain growth with fine pores inside the grains were observed with increasing Zn content. The overall results are discussed in light of the existing understanding of these systems.