NDLI: Crystallization of (Fe, Mn)-based nanoparticles in sodium-silicate glasses

Content Provider	Springer Nature Link
Author	Harizava, Ruzha Gugov, Ivailo Rüssel, Christian Tatchev, Dragomir Raghuwanshi, Vikram Singh Hoell, Armin
Copyright Year	2011
Abstract	In this investigation, glasses from the system Na$_{2}$O/MnO/SiO$_{2}$/Fe$_{2}$O$_{3}$ are prepared using a conventional glass-melting technique. During annealing the glass, a nanocrystalline (Fe, Mn)-based spinel phase is precipitated. The phase composition and microstructure of the formed glass–ceramics are studied using X-ray diffraction and electron microscopy. Anomalous small-angle X-ray scattering experiment is used to gather information on the size, composition and element distribution for the precipitated (Fe, Mn)-based nanocrystals. The sizes of the formed spinel crystals, as determined by scanning electron microscopy and anomalous X-ray scattering, are in the range from 12 to 50 nm for annealing temperatures in the range from 550 to 700 °C. Annealing for a longer period of time at temperatures ≥600 °C results in the formation of a second crystalline phase, NaFe(SiO$_{3}$)$_{2}$ (aegirine). The ASAXS data show the formation of core–shell structure for the (Fe, Mn)-based crystals with core consisting mostly of iron oxide and a shell, depleted of Fe and Mn. The growth of the spinel crystals is assumed to be kinetically self-constrained.
Starting Page	7169
Ending Page	7176
Page Count	8
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	46
Issue Number	22
e-ISSN	15734803
Language	English
Publisher	Springer US
Publisher Date	2011-08-06
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Materials Science Polymer Sciences Characterization and Evaluation of Materials Continuum Mechanics and Mechanics of Materials Mechanics Crystallography
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

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