NDLI: Effect of MnO$_{2}$ Addition on Sintering Properties of 18NiO-NiFe$_{2}$O$_{4}$ Composite Ceramics: Preliminary Results

Content Provider	Springer Nature Link
Author	Du, Jinjing Liu, Yihan Yao, Guangchun Zhang, Zhigang
Copyright Year	2011
Abstract	NiFe$_{2}$O$_{4}$ samples with small amounts of MnO$_{2}$ were prepared via ball-milling process and two-step sintering process from commercial powders. Sintered density, average grain size, and microstructure of Mn-doped 18NiO-NiFe$_{2}$O$_{4}$ composite ceramics have been investigated by means of x-ray diffraction, scanning electron microscopy, and energy dispersive spectroscopy. Bending strength was measured by three-point method. The results show that the crystalline structures of the ceramic matrix are still NiFe$_{2}$O$_{4}$ spinel structure and Mn ions homogeneously distribute in both the grains interiors and the grain boundaries. When 1 wt.% MnO$_{2}$ was added, the values of relative density and bending strength of composite ceramics reached their respective maximum of 93.6% and 38.75 MPa, respectively. It is preliminarily found that MnO$_{2}$ can reduce the sintering temperature obviously because of partial substitution of Fe$^{3+}$ with Mn$^{4+}$ in NiFe$_{2}$O$_{4}$ lattice.
Starting Page	1998
Ending Page	2001
Page Count	4
File Format	PDF
ISSN	10599495
Journal	Journal of Materials Engineering and Performance
Volume Number	21
Issue Number	9
e-ISSN	15441024
Language	English
Publisher	Springer US
Publisher Date	2012-01-03
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	ceramic matrix composites grain refinement heat treating mechanical testing MnO$_{2}$ addition Engineering Design Tribology, Corrosion and Coatings Characterization and Evaluation of Materials Quality Control, Reliability, Safety and Risk
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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