Effects of microsilica content on microstructure and strength of lightweight castable refractories containing porous corundum-spinel aggregate
High-strength, lightweight castable refractories based on spinel were prepared by introducing porous corundum-spinel aggregate and appropriate microsilica. The effects of microsilica content on microstructure and properties of lightweight castable refractories were investigated using SEM, XRD, mercu...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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International Institute for the Science of Sintering, Beograd
2009-01-01
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| Series: | Science of Sintering |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0350-820X/2009/0350-820X0903275Y.pdf |
| _version_ | 1818578752677871616 |
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| author | Yan W. Li N. Han B.Q. |
| author_facet | Yan W. Li N. Han B.Q. |
| author_sort | Yan W. |
| collection | DOAJ |
| description | High-strength, lightweight castable refractories based on spinel were prepared by introducing porous corundum-spinel aggregate and appropriate microsilica. The effects of microsilica content on microstructure and properties of lightweight castable refractories were investigated using SEM, XRD, mercury porosimetry measurements and FactSage thermochemical software. It's found that microsilica was almost dissolved into a liquid phase at high temperature, which promoted liquid sintering. With increasing microsilica content, the matrices became denser and average pore size of matrices increased, then apparent porosity decreased, crushing strength increased and content of liquid phase in castables at 1600°C increased. The appropriate microsilica content is 0.65 to 1.95 wt%, which reaches to a compromise among apparent porosity (33-38%), crushing strength (82-125MPa) and liquid content (1.80~4.97 wt%). |
| first_indexed | 2024-12-16T06:50:48Z |
| format | Article |
| id | doaj.art-b4b83e9b050943d38e40471795a2cd96 |
| institution | Directory Open Access Journal |
| issn | 0350-820X |
| language | English |
| last_indexed | 2024-12-16T06:50:48Z |
| publishDate | 2009-01-01 |
| publisher | International Institute for the Science of Sintering, Beograd |
| record_format | Article |
| series | Science of Sintering |
| spelling | doaj.art-b4b83e9b050943d38e40471795a2cd962022-12-21T22:40:25ZengInternational Institute for the Science of Sintering, BeogradScience of Sintering0350-820X2009-01-0141327528110.2298/SOS0903275YEffects of microsilica content on microstructure and strength of lightweight castable refractories containing porous corundum-spinel aggregateYan W.Li N.Han B.Q.High-strength, lightweight castable refractories based on spinel were prepared by introducing porous corundum-spinel aggregate and appropriate microsilica. The effects of microsilica content on microstructure and properties of lightweight castable refractories were investigated using SEM, XRD, mercury porosimetry measurements and FactSage thermochemical software. It's found that microsilica was almost dissolved into a liquid phase at high temperature, which promoted liquid sintering. With increasing microsilica content, the matrices became denser and average pore size of matrices increased, then apparent porosity decreased, crushing strength increased and content of liquid phase in castables at 1600°C increased. The appropriate microsilica content is 0.65 to 1.95 wt%, which reaches to a compromise among apparent porosity (33-38%), crushing strength (82-125MPa) and liquid content (1.80~4.97 wt%).http://www.doiserbia.nb.rs/img/doi/0350-820X/2009/0350-820X0903275Y.pdfhigh-strengthlightweightspinelmicrosilicaliquid sintering |
| spellingShingle | Yan W. Li N. Han B.Q. Effects of microsilica content on microstructure and strength of lightweight castable refractories containing porous corundum-spinel aggregate Science of Sintering high-strength lightweight spinel microsilica liquid sintering |
| title | Effects of microsilica content on microstructure and strength of lightweight castable refractories containing porous corundum-spinel aggregate |
| title_full | Effects of microsilica content on microstructure and strength of lightweight castable refractories containing porous corundum-spinel aggregate |
| title_fullStr | Effects of microsilica content on microstructure and strength of lightweight castable refractories containing porous corundum-spinel aggregate |
| title_full_unstemmed | Effects of microsilica content on microstructure and strength of lightweight castable refractories containing porous corundum-spinel aggregate |
| title_short | Effects of microsilica content on microstructure and strength of lightweight castable refractories containing porous corundum-spinel aggregate |
| title_sort | effects of microsilica content on microstructure and strength of lightweight castable refractories containing porous corundum spinel aggregate |
| topic | high-strength lightweight spinel microsilica liquid sintering |
| url | http://www.doiserbia.nb.rs/img/doi/0350-820X/2009/0350-820X0903275Y.pdf |
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