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http://hdl.handle.net/2080/27
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| DC Field | Value | Language |
|---|
| contributor.author | Bera, J | - |
| contributor.author | Rout, S K | - |
| date.accessioned | 2005-04-25T11:16:02Z | - |
| date.available | 2005-04-25T11:16:02Z | - |
| date.issued | 2005-01 | - |
| identifier.citation | Materials Letters, Vol 59, Iss 1, P 135-138 | en |
| identifier.uri | http://hdl.handle.net/2080/27 | - |
| description | Copyright of this article belongs to Elsevier Science Ltd | en |
| description.abstract | The formation of solid solution composition BaTi0.6Zr0.4O3, from BaCO3, TiO2 and ZrO2 powders has been studied through solid-oxide reaction using TGA/DSC, XRD. BaCO3 decomposes at much lower temperature in the mixture due to the presence of TiO2. BaTiO3 and BaZrO3 start forming from the temperature range 700o-800oC without intermediate formation of BaO or other titanate/zirconate phases. Rate of BaTiO3 formation is higher than BaZrO3 formation due to the lower activation energy (34.3 kcal/mol) required for titanate formation than zirconate (48.4 kcal/mol). Solid solution then forms by diffusion of BaTiO3 into BaZrO3 from 1300oC onwards. Lattice parameter of initial SS-phase is higher, indicating the phase has a coherent interface with zirconate and higher in Zr-concentration than final product. Activation energy for the SS-formation (133 kcal/mole) indicates that Ba and/or O diffution through SS layer may limit the reaction. | en |
| format.extent | 897558 bytes | - |
| format.mimetype | application/pdf | - |
| language.iso | en | - |
| publisher | Elsevier | en |
| subject | perovskite | en |
| subject | ferroelectrics | en |
| subject | BaTiO3-BaZrO3 | en |
| subject | solid solution | en |
| title | On the formation mechanism of BaTiO3–BaZrO3 solid solution through solid-oxide reaction | en |
| type | Article | en |
| Appears in Collections: | Journal Articles
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Description |
Size | Format |
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| BaTiO3-BaZrO3.pdf | | 876Kb | Adobe PDF | View/Open |
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