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

Ruzha Harizanova, Ivailo Gugov, Christian Rüssel, Dragomir Tatchev, Vikram Singh Raghuwanshi, Armin Hoell

Research output: Contribution to journalArticleResearchpeer-review

Abstract

In this investigation, glasses from the system Na2O/MnO/SiO 2/Fe2O3 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(SiO3)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.

Original languageEnglish
Pages (from-to)7169-7176
Number of pages8
JournalJournal of Materials Science
Volume46
Issue number22
DOIs
Publication statusPublished - Nov 2011
Externally publishedYes

Cite this

Harizanova, Ruzha ; Gugov, Ivailo ; Rüssel, Christian ; Tatchev, Dragomir ; Raghuwanshi, Vikram Singh ; Hoell, Armin. / Crystallization of (Fe, Mn)-based nanoparticles in sodium-silicate glasses. In: Journal of Materials Science. 2011 ; Vol. 46, No. 22. pp. 7169-7176.
@article{49eaabab098d47f0969acb66fd58ba46,
title = "Crystallization of (Fe, Mn)-based nanoparticles in sodium-silicate glasses",
abstract = "In this investigation, glasses from the system Na2O/MnO/SiO 2/Fe2O3 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(SiO3)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.",
author = "Ruzha Harizanova and Ivailo Gugov and Christian R{\"u}ssel and Dragomir Tatchev and Raghuwanshi, {Vikram Singh} and Armin Hoell",
year = "2011",
month = "11",
doi = "10.1007/s10853-011-5840-x",
language = "English",
volume = "46",
pages = "7169--7176",
journal = "Journal of Materials Science",
issn = "0022-2461",
publisher = "Springer-Praxis",
number = "22",

}

Crystallization of (Fe, Mn)-based nanoparticles in sodium-silicate glasses. / Harizanova, Ruzha; Gugov, Ivailo; Rüssel, Christian; Tatchev, Dragomir; Raghuwanshi, Vikram Singh; Hoell, Armin.

In: Journal of Materials Science, Vol. 46, No. 22, 11.2011, p. 7169-7176.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Crystallization of (Fe, Mn)-based nanoparticles in sodium-silicate glasses

AU - Harizanova, Ruzha

AU - Gugov, Ivailo

AU - Rüssel, Christian

AU - Tatchev, Dragomir

AU - Raghuwanshi, Vikram Singh

AU - Hoell, Armin

PY - 2011/11

Y1 - 2011/11

N2 - In this investigation, glasses from the system Na2O/MnO/SiO 2/Fe2O3 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(SiO3)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.

AB - In this investigation, glasses from the system Na2O/MnO/SiO 2/Fe2O3 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(SiO3)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.

UR - http://www.scopus.com/inward/record.url?scp=80052040536&partnerID=8YFLogxK

U2 - 10.1007/s10853-011-5840-x

DO - 10.1007/s10853-011-5840-x

M3 - Article

VL - 46

SP - 7169

EP - 7176

JO - Journal of Materials Science

JF - Journal of Materials Science

SN - 0022-2461

IS - 22

ER -