Comparison of Precursor Preparation Routes on Final Density of Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> Garnets Prepared via Reactive Sintering
Yttrium iron garnet was obtained using four methods of synthesis. A modified citrate method and a modified citrate method with YIG (yttrium iron garnet, Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub>) nucleation were used. In two subsequent methods, YIP (yttrium iron p...
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| Online Access: | https://www.mdpi.com/1996-1944/14/23/7316 |
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| author | Kamil Wojciechowski Radosław Lach Magdalena Stan Łukasz Łańcucki Marta Gajewska Dariusz Zientara |
| author_facet | Kamil Wojciechowski Radosław Lach Magdalena Stan Łukasz Łańcucki Marta Gajewska Dariusz Zientara |
| author_sort | Kamil Wojciechowski |
| collection | DOAJ |
| description | Yttrium iron garnet was obtained using four methods of synthesis. A modified citrate method and a modified citrate method with YIG (yttrium iron garnet, Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub>) nucleation were used. In two subsequent methods, YIP (yttrium iron perovskite, YFeO<sub>3</sub>) and α-Fe<sub>2</sub>O<sub>3</sub> obtained in the first case by the citrate method and in the second by precipitation of precursors with an ammonia solution were used as the input precursors for reaction sintering. Differential scanning calorimetry (DSC) measurements of the output powders obtained by all methods allowed to identify the effects observed during the temperature increase. Dilatometric measurements allowed to determine the changes in linear dimensions at individual stages of reaction sintering. In the case of materials obtained by the citrate method, two effects occur with the increasing temperature, the first of which corresponds to the reaction of the formation of yttrium iron perovskite (YIP), and the second is responsible for the reaction of the garnet (YIG) formation. However, in the case of heat treatment of the mixture of YIP and α-Fe<sub>2</sub>O<sub>3</sub>, we observe only the effect responsible for the solid state reaction leading to the formation of yttrium iron garnet. The obtained materials were reaction sintered at temperatures of 1300 and 1400 °C. Only in the case of material obtained from a mixture of perovskite and iron(III) oxide obtained by ammonia precipitation at temperature of 1400 °C were densities achieved higher than 98% of the theoretical density. The use of Hot Isostatic Pressing (HIP) in the case of this material allowed to eliminate the remaining porosity and to obtain full density. |
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| language | English |
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| spelling | doaj.art-bac92e073fc24d0e9f1b04cf054c8fed2023-11-23T02:41:37ZengMDPI AGMaterials1996-19442021-11-011423731610.3390/ma14237316Comparison of Precursor Preparation Routes on Final Density of Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> Garnets Prepared via Reactive SinteringKamil Wojciechowski0Radosław Lach1Magdalena Stan2Łukasz Łańcucki3Marta Gajewska4Dariusz Zientara5Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30-059 Kraków, PolandFaculty of Materials Science and Ceramics, AGH University of Science and Technology, 30-059 Kraków, PolandFaculty of Materials Science and Ceramics, AGH University of Science and Technology, 30-059 Kraków, PolandFaculty of Materials Science and Ceramics, AGH University of Science and Technology, 30-059 Kraków, PolandFaculty of Materials Science and Ceramics, AGH University of Science and Technology, 30-059 Kraków, PolandFaculty of Materials Science and Ceramics, AGH University of Science and Technology, 30-059 Kraków, PolandYttrium iron garnet was obtained using four methods of synthesis. A modified citrate method and a modified citrate method with YIG (yttrium iron garnet, Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub>) nucleation were used. In two subsequent methods, YIP (yttrium iron perovskite, YFeO<sub>3</sub>) and α-Fe<sub>2</sub>O<sub>3</sub> obtained in the first case by the citrate method and in the second by precipitation of precursors with an ammonia solution were used as the input precursors for reaction sintering. Differential scanning calorimetry (DSC) measurements of the output powders obtained by all methods allowed to identify the effects observed during the temperature increase. Dilatometric measurements allowed to determine the changes in linear dimensions at individual stages of reaction sintering. In the case of materials obtained by the citrate method, two effects occur with the increasing temperature, the first of which corresponds to the reaction of the formation of yttrium iron perovskite (YIP), and the second is responsible for the reaction of the garnet (YIG) formation. However, in the case of heat treatment of the mixture of YIP and α-Fe<sub>2</sub>O<sub>3</sub>, we observe only the effect responsible for the solid state reaction leading to the formation of yttrium iron garnet. The obtained materials were reaction sintered at temperatures of 1300 and 1400 °C. Only in the case of material obtained from a mixture of perovskite and iron(III) oxide obtained by ammonia precipitation at temperature of 1400 °C were densities achieved higher than 98% of the theoretical density. The use of Hot Isostatic Pressing (HIP) in the case of this material allowed to eliminate the remaining porosity and to obtain full density.https://www.mdpi.com/1996-1944/14/23/7316citrate precursor methodyttrium iron garnet (YIG)reaction sintering |
| spellingShingle | Kamil Wojciechowski Radosław Lach Magdalena Stan Łukasz Łańcucki Marta Gajewska Dariusz Zientara Comparison of Precursor Preparation Routes on Final Density of Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> Garnets Prepared via Reactive Sintering Materials citrate precursor method yttrium iron garnet (YIG) reaction sintering |
| title | Comparison of Precursor Preparation Routes on Final Density of Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> Garnets Prepared via Reactive Sintering |
| title_full | Comparison of Precursor Preparation Routes on Final Density of Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> Garnets Prepared via Reactive Sintering |
| title_fullStr | Comparison of Precursor Preparation Routes on Final Density of Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> Garnets Prepared via Reactive Sintering |
| title_full_unstemmed | Comparison of Precursor Preparation Routes on Final Density of Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> Garnets Prepared via Reactive Sintering |
| title_short | Comparison of Precursor Preparation Routes on Final Density of Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> Garnets Prepared via Reactive Sintering |
| title_sort | comparison of precursor preparation routes on final density of y sub 3 sub fe sub 5 sub o sub 12 sub garnets prepared via reactive sintering |
| topic | citrate precursor method yttrium iron garnet (YIG) reaction sintering |
| url | https://www.mdpi.com/1996-1944/14/23/7316 |
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