Mechanism of Ni-Zn ferrite formation in the presence of molten Li/sub 2/SO/sub 4/-Na/sub 2/SO/sub 4/
Journal Article
·
· J. Am. Ceram. Soc.; (United States)
Nickel-zinc ferrite powder was prepared from the constituent oxides in the presence of molten Li/sub 2/SO/sub 4/-Na/sub 2/SO/sub 4/. The effect of ZnO on the reactivity of NiO was studied. The process of Ni-Zn ferrite formation was followed by X-ray diffraction and thermomagnetic analyses. Particle size and shape of the product were determined by scanning electron microscopy. In the presence of molten salt, ZnO enhances the reactivity of NiO, and Ni-Zn ferrite formation is completed at lower temperature than Ni ferrite formation. In the reaction for the formation of NiZn ferrite, Zn ferrite forms before NiO is incorporated into the ferrite phase. The reaction between the initially formed Zn ferrite and NiO leads to a rate of Ni-Zn ferrite formation higher than that of Ni ferrite formation from NiO and Fe/sub 2/O/sub 3/.
- Research Organization:
- Keio Univ., 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223
- OSTI ID:
- 5634164
- Journal Information:
- J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 69:4; ISSN JACTA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ACTIVATION ENERGY
ALKALI METAL COMPOUNDS
CERAMICS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
COHERENT SCATTERING
DIFFRACTION
ELECTRON MICROSCOPY
ENERGY
FERRIMAGNETIC MATERIALS
FERRITES
IRON COMPOUNDS
IRON OXIDES
KINETICS
LITHIUM COMPOUNDS
LITHIUM SULFATES
MAGNETIC MATERIALS
MATERIALS
MICROSCOPY
MOLTEN SALTS
NICKEL COMPOUNDS
NICKEL OXIDES
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
POWDERS
REACTION KINETICS
SALTS
SCANNING ELECTRON MICROSCOPY
SCATTERING
SIZE
SODIUM COMPOUNDS
SODIUM SULFATES
SULFATES
SULFUR COMPOUNDS
SYNTHESIS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
YIELDS
ZINC COMPOUNDS
ZINC OXIDES
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ACTIVATION ENERGY
ALKALI METAL COMPOUNDS
CERAMICS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
COHERENT SCATTERING
DIFFRACTION
ELECTRON MICROSCOPY
ENERGY
FERRIMAGNETIC MATERIALS
FERRITES
IRON COMPOUNDS
IRON OXIDES
KINETICS
LITHIUM COMPOUNDS
LITHIUM SULFATES
MAGNETIC MATERIALS
MATERIALS
MICROSCOPY
MOLTEN SALTS
NICKEL COMPOUNDS
NICKEL OXIDES
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
POWDERS
REACTION KINETICS
SALTS
SCANNING ELECTRON MICROSCOPY
SCATTERING
SIZE
SODIUM COMPOUNDS
SODIUM SULFATES
SULFATES
SULFUR COMPOUNDS
SYNTHESIS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
YIELDS
ZINC COMPOUNDS
ZINC OXIDES