A study on phase equilibria in the CaO-Al2O3-SiO2-“Nb2O5”(5 mass pct) system in reducing atmosphere
Phase equilibria in 5 mass% “Nb2O5” plane of CaO-Al2O3-SiO2-“Nb2O5” system at 1873 K in an oxygen partial pressure of 1.78×10-6 Pa have been investigated through isothermal equilibration and quenching followed by EPMA examinations. In order to characterize the effect of niobium oxide on the phase...
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University of Belgrade, Technical Faculty, Bor
2013-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2013/1450-53391300013Y.pdf |
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| author | Yan B. Guo R. Zhang J. |
| author_facet | Yan B. Guo R. Zhang J. |
| author_sort | Yan B. |
| collection | DOAJ |
| description | Phase equilibria in 5 mass% “Nb2O5” plane of CaO-Al2O3-SiO2-“Nb2O5” system at 1873 K in an oxygen partial pressure of 1.78×10-6 Pa have been investigated through isothermal equilibration and quenching followed by EPMA examinations. In order to characterize the effect of niobium oxide on the phase relationship of the CaO-Al2O3-SiO2 system, Nb2O5-containing and Nb2O5-free samples with the same CaO/Al2O3/SiO2 weight ratio were investigated simultaneously. The ratios of CaO/Al2O3/SiO2 were selected from the CaO•2Al2O3-liquid two-phase equilibrium region in the CaO-Al2O3- SiO2 system at1873 K. It was found that the adding of 5 mass% Nb2O5 to the CaO-Al2O3-SiO2 system caused the original CaO•2Al2O3-liquid equilibrium to become three different new equilibria. The three equilibria were single liquid phase, CaO•6Al2O3-liquid and gehlenite-CaO•2Al2O3-liquid equilibrium respectively. The gehlenite phase may be a new solid solution of 2CaO•Al2O3•SiO2 and NbOx with melting point higher than 1873 K. |
| format | Article |
| id | doaj-art-dc3c2cfa658d43d8a4f1953414147a0b |
| institution | Kabale University |
| issn | 1450-5339 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | University of Belgrade, Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj-art-dc3c2cfa658d43d8a4f1953414147a0b2025-02-02T03:37:58ZengUniversity of Belgrade, Technical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392013-01-0149214515110.2298/JMMB120823013YA study on phase equilibria in the CaO-Al2O3-SiO2-“Nb2O5”(5 mass pct) system in reducing atmosphereYan B.Guo R.Zhang J.Phase equilibria in 5 mass% “Nb2O5” plane of CaO-Al2O3-SiO2-“Nb2O5” system at 1873 K in an oxygen partial pressure of 1.78×10-6 Pa have been investigated through isothermal equilibration and quenching followed by EPMA examinations. In order to characterize the effect of niobium oxide on the phase relationship of the CaO-Al2O3-SiO2 system, Nb2O5-containing and Nb2O5-free samples with the same CaO/Al2O3/SiO2 weight ratio were investigated simultaneously. The ratios of CaO/Al2O3/SiO2 were selected from the CaO•2Al2O3-liquid two-phase equilibrium region in the CaO-Al2O3- SiO2 system at1873 K. It was found that the adding of 5 mass% Nb2O5 to the CaO-Al2O3-SiO2 system caused the original CaO•2Al2O3-liquid equilibrium to become three different new equilibria. The three equilibria were single liquid phase, CaO•6Al2O3-liquid and gehlenite-CaO•2Al2O3-liquid equilibrium respectively. The gehlenite phase may be a new solid solution of 2CaO•Al2O3•SiO2 and NbOx with melting point higher than 1873 K.http://www.doiserbia.nb.rs/img/doi/1450-5339/2013/1450-53391300013Y.pdfPhase equilibrium“Nb2O5”- CaO-Al2O3-SiO2 systemreducing atmosphere |
| spellingShingle | Yan B. Guo R. Zhang J. A study on phase equilibria in the CaO-Al2O3-SiO2-“Nb2O5”(5 mass pct) system in reducing atmosphere Journal of Mining and Metallurgy. Section B: Metallurgy Phase equilibrium “Nb2O5”- CaO-Al2O3-SiO2 system reducing atmosphere |
| title | A study on phase equilibria in the CaO-Al2O3-SiO2-“Nb2O5”(5 mass pct) system in reducing atmosphere |
| title_full | A study on phase equilibria in the CaO-Al2O3-SiO2-“Nb2O5”(5 mass pct) system in reducing atmosphere |
| title_fullStr | A study on phase equilibria in the CaO-Al2O3-SiO2-“Nb2O5”(5 mass pct) system in reducing atmosphere |
| title_full_unstemmed | A study on phase equilibria in the CaO-Al2O3-SiO2-“Nb2O5”(5 mass pct) system in reducing atmosphere |
| title_short | A study on phase equilibria in the CaO-Al2O3-SiO2-“Nb2O5”(5 mass pct) system in reducing atmosphere |
| title_sort | study on phase equilibria in the cao al2o3 sio2 nb2o5 5 mass pct system in reducing atmosphere |
| topic | Phase equilibrium “Nb2O5”- CaO-Al2O3-SiO2 system reducing atmosphere |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2013/1450-53391300013Y.pdf |
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