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http://hdl.handle.net/1942/3039
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DC Field | Value | Language |
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dc.contributor.author | VAN BAEL, Marlies | - |
dc.contributor.author | KAREIVA, Aivaras | - |
dc.contributor.author | VANHOYLAND, Geert | - |
dc.contributor.author | MULLENS, Jules | - |
dc.contributor.author | FRANCO, Dirk | - |
dc.contributor.author | YPERMAN, Jan | - |
dc.contributor.author | VAN POUCKE, Lucien | - |
dc.date.accessioned | 2007-11-23T13:52:06Z | - |
dc.date.available | 2007-11-23T13:52:06Z | - |
dc.date.issued | 1999 | - |
dc.identifier.citation | THERMOCHIMICA ACTA, 340-341. p. 407-416 | - |
dc.identifier.issn | 0040-6031 | - |
dc.identifier.uri | http://hdl.handle.net/1942/3039 | - |
dc.description.abstract | In order to study the influence of calcium substitution on the thermal stability and phase composition of the YBa2Cu4O8 (Y-124) superconductor, precursor powders with composition Y:Ca:Ba:Cu = 1 - x : x : 2 : 4 (x = 0.0-0.1) are prepared using an acetate-tartrate based sol-gel method, The phase composition of the products formed after different stages of heat treatment at 800 degrees C and under 1 atm oxygen pressure is examined by X-ray powder diffraction (XRD) and thermogravimetric analysis (TGA). We found that in the first stage of the heat treatment, among stable mixed oxides and carbonate, mainly Y2Ba4Cu7Oy (Y-247) and CuO are formed. Upon further heating Y-247 can react with CuO to form Y-124, but can also decompose into Y-124 and YBa2Cu3O7 - y (Y-123). The formation of Y-123 is favoured by an increasing amount of calcium substitution. We also demonstrate that the TGA technique makes it possible to detect and distinguish between the presence of the Y-123, Y-124 and Y-247 when they are simultaneously present in a sample, while this is less obvious using only XRD. (C) 1999 Elsevier Science B.V, All rights reserved. | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.subject.other | YBa2Cu4O8 superconductor; X-ray powder diffraction; thermogravimetric analysis; calcium substitution | - |
dc.title | Influence of calcium substitution on the formation and thermal stability of the YBa2Cr4O8 superconductor | - |
dc.type | Journal Contribution | - |
dc.identifier.epage | 416 | - |
dc.identifier.spage | 407 | - |
dc.identifier.volume | 340-341 | - |
local.format.pages | 10 | - |
dc.description.notes | Limburgs Univ Ctr, Lab Inorgan & Phys Chem, IMO, B-3590 Diepenbeek, Belgium. Vilnius State Univ, Dept Gen & Inorgan Chem, LT-2006 Vilnius, Lithuania.Mullens, J, Limburgs Univ Ctr, Lab Inorgan & Phys Chem, IMO, Univ Campus, B-3590 Diepenbeek, Belgium. | - |
local.type.refereed | Refereed | - |
local.type.specified | Article | - |
dc.bibliographicCitation.oldjcat | A1 | - |
dc.identifier.doi | 10.1016/S0040-6031(99)00285-3 | - |
dc.identifier.isi | 000084236400039 | - |
item.fullcitation | VAN BAEL, Marlies; KAREIVA, Aivaras; VANHOYLAND, Geert; MULLENS, Jules; FRANCO, Dirk; YPERMAN, Jan & VAN POUCKE, Lucien (1999) Influence of calcium substitution on the formation and thermal stability of the YBa2Cr4O8 superconductor. In: THERMOCHIMICA ACTA, 340-341. p. 407-416. | - |
item.accessRights | Closed Access | - |
item.contributor | VAN BAEL, Marlies | - |
item.contributor | KAREIVA, Aivaras | - |
item.contributor | VANHOYLAND, Geert | - |
item.contributor | MULLENS, Jules | - |
item.contributor | FRANCO, Dirk | - |
item.contributor | YPERMAN, Jan | - |
item.contributor | VAN POUCKE, Lucien | - |
item.fulltext | No Fulltext | - |
item.validation | ecoom 2000 | - |
Appears in Collections: | Research publications |
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