Microstructure and properties of Ni-Zn ferrites sintered from slip cast colloidally precipitated particles

Author

Tseng, T.Y. ; Lin, J.C.

Author_Institution

Inst. of Electron., Nat. Chiao-Tung Univ., Hsinchu, Taiwan

Volume

25

Issue

6

fYear

1989

fDate

11/1/1989 12:00:00 AM

Firstpage

4405

Lastpage

4408

Abstract

The microstructural dependence of magnetic permeability and magnetic loss of Ni-Zn ferrites sintered from split-cast colloidally precipitated ultrafine particles was investigated. A low-loss Ni-Zn ferrite (tan δ/μ₀=4.92×10^-5 at 1 MHz) having nearly maximum attainable density, fairly uniform and small grain size, and no significant zinc loss was prepared by sintering at 1100°C. There was considerable discrepancy in the permeability-grain size relationship between ferrites sintered at ⩽1100°C and at >1100°C. The zinc loss and intragranular pores in 1100°C sintered ferrites may explain this discrepancy

Keywords

X-ray diffraction examination of materials; crystal microstructure; ferrites; grain size; magnetic leakage; magnetic permeability; magnetic properties of fine particles; nickel compounds; scanning electron microscope examination of materials; sintering; zinc compounds; 1 MHz; 1100 degC; Ni_0.5Zn_0.5Fe₂O₄; SEM; X-ray diffraction; ferrites; grain size; intragranular pores; magnetic loss; magnetic permeability; microstructural dependence; sintering; split-cast colloidally precipitated ultrafine particles; Casting; Etching; Ferrites; Grain size; Microstructure; Powders; Rheology; Scanning electron microscopy; Temperature; Zinc;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.45319

Filename

45319