<abstract xmlns="http://www.w3.org/1999/xhtml">Magnesium oxide (MgO) is one of the most important raw materials in many branches of industry. Magnesium oxide is a popular refractory raw material because of its high refractoriness and high resistance to basic slags and environment. In many cases, use of MgO is limited by its properties, especially the presence of secondary phases like iron oxides. The amount and distribution of iron oxides can strongly influence the technological properties of MgO and depend on the manufacturing method, particularly the heat-treatment process. The aim of the study was to evaluate the influence of the heat-treatment process on amount and distribution of iron ions in a magnesium oxide lattice. The 57Fe Mössbauer effect measurements of fused and sintered magnesium oxide samples doped by the iron oxide were conducted. Investigation reveals in both cases the presence of Fe2+ as well as Fe3+ ions. Fe2+ ions occupy Mg2+ octahedral sites in the MgO lattice, whereas the Fe3+ ions are located in highly distorted octahedral coordination. The amount of Fe2+ varies from around 66% for fused samples to 30% for sintered samples.</abstract>

Magnesium oxide (MgO) is one of the most important raw materials in many branches of industry. Magnesium oxide is a popular refractory raw material because of its high refractoriness and high resistance to basic slags and environment. In many cases, use of MgO is limited by its properties, especially the presence of secondary phases like iron oxides. The amount and distribution of iron oxides can strongly influence the technological properties of MgO and depend on the manufacturing method, particularly the heat-treatment process. The aim of the study was to evaluate the influence of the heat-treatment process on amount and distribution of iron ions in a magnesium oxide lattice. The 57Fe Mössbauer effect measurements of fused and sintered magnesium oxide samples doped by the iron oxide were conducted. Investigation reveals in both cases the presence of Fe2+ as well as Fe3+ ions. Fe2+ ions occupy Mg2+ octahedral sites in the MgO lattice, whereas the Fe3+ ions are located in highly distorted octahedral coordination. The amount of Fe2+ varies from around 66% for fused samples to 30% for sintered samples.

Position of Fe ions in MgO crystalline structure

Department of Ceramics and Refractories, Faculty of Material Science and Ceramics, AGH – University of Science and Technology, 30 A. Mickiewicza Ave., 30-059 Kraków, Poland, Tel.: +48 12 617 2462, Fax: +48 12 633 4630

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{"article-title":"Position of Fe ions in MgO crystalline structure"}

Magnesium oxide (MgO) is one of the most important raw materials in many branches of industry. Magnesium oxide is a popular refractory raw material because of...

Position of Fe ions in MgO crystalline structure

Published Online: Mar 12, 2015

Page range: 143 - 145

Received: Jun 18, 2014

Accepted: Nov 02, 2014

DOI: https://doi.org/10.1515/nuka-2015-0024

Keywords
Mössbauer spectroscopy, MgO, Fe ions, crystal structure

© Jacek Szczerba, Ryszard Prorok, Paweł Stoch, Edyta Śnieżek, Ilona Jastrzębska

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Position of Fe ions in MgO crystalline structure

Published Online: Mar 12, 2015

Page range: 143 - 145

Received: Jun 18, 2014

Accepted: Nov 02, 2014

DOI: https://doi.org/10.1515/nuka-2015-0024

KeywordsMössbauer spectroscopy, MgO, Fe ions, crystal structure

© Jacek Szczerba, Ryszard Prorok, Paweł Stoch, Edyta Śnieżek, Ilona Jastrzębska

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Mössbauer spectroscopy, MgO, Fe ions, crystal structure