Investigation of Effective Parameters In the Synthesis of Mullite – Zirconia Composite Formed by Gel Casting Process
In this study, mullite– irconia composite samples were prepared by reaction sintering of alumina and zircon powder via gel casting process. Gel casting is a new ceramic forming technique. This process is based on the casting of slurry, containing ceramic powder, dispersant and premix monomer solutio...
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| Format: | Article |
| Language: | fas |
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Isfahan University of Technology
2013-06-01
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| Series: | Journal of Advanced Materials in Engineering |
| Subjects: | |
| Online Access: | http://jame.iut.ac.ir/article-1-553-en.html |
| _version_ | 1818725529490030592 |
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| author | N. Miadi H. Sarpoolaky H. Ghassai |
| author_facet | N. Miadi H. Sarpoolaky H. Ghassai |
| author_sort | N. Miadi |
| collection | DOAJ |
| description | In this study, mullite– irconia composite samples were prepared by reaction sintering of alumina and zircon powder via gel casting process. Gel casting is a new ceramic forming technique. This process is based on the casting of slurry, containing ceramic powder, dispersant and premix monomer solution. To achieve stabilized, high solid loading (80 wt%) and castable slurry, the rheological properties of slurry were optimized. The monomers polymerized the slurry to form gelled specimens. After gelation, the specimens were unmolded, then dried out under controlled condition. Burning out and sintering of the specimens was carried out in the range of 1400-1700°C. Apparent porosity and bulk density of the sintered samples were measured by soaking in water. Crystalline phase evolution and microstructure were determined by XRD and SEM techniques. Results showed that the reaction sintering and mullite formation was completed at 1700°C due to very slow diffusion of Al3+ ions within amorphous silica formed at the decomposition of zircon. The sintered samples at this temperature also showed the lowest apparent porosity (≈ 4%) and the highest bulk density (≈3.40 gr/cm-3). |
| first_indexed | 2024-12-17T21:43:46Z |
| format | Article |
| id | doaj.art-61cbde69db024d84813c47adcbbd0e5c |
| institution | Directory Open Access Journal |
| issn | 2251-600X 2423-5733 |
| language | fas |
| last_indexed | 2024-12-17T21:43:46Z |
| publishDate | 2013-06-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Advanced Materials in Engineering |
| spelling | doaj.art-61cbde69db024d84813c47adcbbd0e5c2022-12-21T21:31:32ZfasIsfahan University of TechnologyJournal of Advanced Materials in Engineering2251-600X2423-57332013-06-013217989Investigation of Effective Parameters In the Synthesis of Mullite – Zirconia Composite Formed by Gel Casting ProcessN. Miadi0H. Sarpoolaky1H. Ghassai2 Department of Materials and Metallurgical Engineering, Iran University of Science and Technology Department of Materials and Metallurgical Engineering, Iran University of Science and Technology Department of Materials and Metallurgical Engineering, Iran University of Science and Technology In this study, mullite– irconia composite samples were prepared by reaction sintering of alumina and zircon powder via gel casting process. Gel casting is a new ceramic forming technique. This process is based on the casting of slurry, containing ceramic powder, dispersant and premix monomer solution. To achieve stabilized, high solid loading (80 wt%) and castable slurry, the rheological properties of slurry were optimized. The monomers polymerized the slurry to form gelled specimens. After gelation, the specimens were unmolded, then dried out under controlled condition. Burning out and sintering of the specimens was carried out in the range of 1400-1700°C. Apparent porosity and bulk density of the sintered samples were measured by soaking in water. Crystalline phase evolution and microstructure were determined by XRD and SEM techniques. Results showed that the reaction sintering and mullite formation was completed at 1700°C due to very slow diffusion of Al3+ ions within amorphous silica formed at the decomposition of zircon. The sintered samples at this temperature also showed the lowest apparent porosity (≈ 4%) and the highest bulk density (≈3.40 gr/cm-3).http://jame.iut.ac.ir/article-1-553-en.htmlmullite- zirconia compositegel castingreaction sintering |
| spellingShingle | N. Miadi H. Sarpoolaky H. Ghassai Investigation of Effective Parameters In the Synthesis of Mullite – Zirconia Composite Formed by Gel Casting Process Journal of Advanced Materials in Engineering mullite- zirconia composite gel casting reaction sintering |
| title | Investigation of Effective Parameters In the Synthesis of Mullite – Zirconia Composite Formed by Gel Casting Process |
| title_full | Investigation of Effective Parameters In the Synthesis of Mullite – Zirconia Composite Formed by Gel Casting Process |
| title_fullStr | Investigation of Effective Parameters In the Synthesis of Mullite – Zirconia Composite Formed by Gel Casting Process |
| title_full_unstemmed | Investigation of Effective Parameters In the Synthesis of Mullite – Zirconia Composite Formed by Gel Casting Process |
| title_short | Investigation of Effective Parameters In the Synthesis of Mullite – Zirconia Composite Formed by Gel Casting Process |
| title_sort | investigation of effective parameters in the synthesis of mullite zirconia composite formed by gel casting process |
| topic | mullite- zirconia composite gel casting reaction sintering |
| url | http://jame.iut.ac.ir/article-1-553-en.html |
| work_keys_str_mv | AT nmiadi investigationofeffectiveparametersinthesynthesisofmullitezirconiacompositeformedbygelcastingprocess AT hsarpoolaky investigationofeffectiveparametersinthesynthesisofmullitezirconiacompositeformedbygelcastingprocess AT hghassai investigationofeffectiveparametersinthesynthesisofmullitezirconiacompositeformedbygelcastingprocess |