Attack of YBa2Cu3O6.8 by acidic aqueous solutions
The dissolution of YBa2Cu3O6.8 in acidic aqueous solutions was studied at 298 K as a function of pH, nature and concentration of present anions and time, t. In the range 2.0 ≤ pH ≤ 4.0, dissolution is congruent and proceeds to completion; dissolution profiles are deceleratory and comply with a contr...
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| Lenguaje: | Inglés |
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Springer Netherlands
1996
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
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| LEADER | 07916caa a22009977a 4500 | ||
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| 001 | PAPER-3422 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518203253.0 | ||
| 008 | 190411s1996 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-0029732084 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 030 | |a JMTSA | ||
| 100 | 1 | |a Candal, R.J. | |
| 245 | 1 | 0 | |a Attack of YBa2Cu3O6.8 by acidic aqueous solutions |
| 260 | |b Springer Netherlands |c 1996 | ||
| 270 | 1 | 0 | |m Candal, R.J.; INQUIMAE, Facultad de Ciencias Exactes, Pabellón 2, 1428-Buenos Aires, Argentina |
| 506 | |2 openaire |e Política editorial | ||
| 504 | |a Myhra, S., Pham, D.K., Smart, R.St.C., Turner, P.S., (1991) Science of Ceramic Interfaces, p. 569. , edited by J. Nowotny Elsevier, Amsterdam | ||
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| 504 | |a Hyde, B.G., Thompson, J.G., Withers, R.L., Fitzgerald, J.D., Stewart, A.M., Bevan, D.J.M., Anderson, J.S., Paterson, M.S., (1987) Nature, 327, p. 402 | ||
| 504 | |a Thompson, J.G., Hyde, B.G., Withers, R.L., Anderson, J.S., Fitzgerald, J.D., Bitmead, J., Paterson, M.S., Stewart, A.M., (1987) Mater. Res. Bull., 22, p. 1715 | ||
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| 504 | |a Jin, S.G., Liu, L.G., Zhu, Z.Z., Huang, Y.L., (1989) Solid State Commun., 69, p. 179 | ||
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| 504 | |a Blesa, M.A., Morando, P.J., Regazzoni, A.E., (1994) Chemical Dissolution of Metal Oxides, , CRC Press, Boca Raton, FL | ||
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| 520 | 3 | |a The dissolution of YBa2Cu3O6.8 in acidic aqueous solutions was studied at 298 K as a function of pH, nature and concentration of present anions and time, t. In the range 2.0 ≤ pH ≤ 4.0, dissolution is congruent and proceeds to completion; dissolution profiles are deceleratory and comply with a contracting volume rate law up to t0.5. The rate of dissolution, which is limited by slow surface reactions, decreases with increasing pH; the kinetic order on proton concentration is a fractional and variable number. At higher pH values, dissolution is arrested at intermediate conversion values. In these cases, congruent dissolution is followed by the precipitation of less soluble solid phases which form a passive layer. The nature of this passive layer depends on pH and on the nature and concentration of present anions, which also define the extent of conversion attained at passivation. The dissolution behaviour of YBa2Cu3O6.8 is described in terms of two consecutive surface reactions: fast equilibrated protonation of surface metal ions is followed by the slow release of cations. Barium surface ions are identified as the more reactive sites. The effect of the fast initial leaching of barium ions on the reactivity of yttrium and copper sites is discussed. The influence of the formal Cu(III) oxidation state is also stressed. © 1996 Chapman & Hall. |l eng | |
| 593 | |a INQUIMAE, Facultad de Ciencias Exactes, Pabellón 2, 1428-Buenos Aires, Argentina | ||
| 593 | |a Departamento Químíca de Reactores, Comisión Nacional de Energía Atómica, Av. del Libertador 8250, 1429-Buenos Aires, Argentina | ||
| 690 | 1 | 0 | |a BARIUM |
| 690 | 1 | 0 | |a CHEMICAL REACTIONS |
| 690 | 1 | 0 | |a COPPER |
| 690 | 1 | 0 | |a DISSOLUTION |
| 690 | 1 | 0 | |a IONS |
| 690 | 1 | 0 | |a LEACHING |
| 690 | 1 | 0 | |a OXIDATION |
| 690 | 1 | 0 | |a PRECIPITATION (CHEMICAL) |
| 690 | 1 | 0 | |a PROTONS |
| 690 | 1 | 0 | |a SOLUTIONS |
| 690 | 1 | 0 | |a SURFACE PHENOMENA |
| 690 | 1 | 0 | |a ACIDIC AQUEOUS SOLUTIONS |
| 690 | 1 | 0 | |a OXIDATION STATE |
| 690 | 1 | 0 | |a PASSIVE LAYER |
| 690 | 1 | 0 | |a PROTONATION |
| 690 | 1 | 0 | |a SURFACE REACTIONS |
| 690 | 1 | 0 | |a VOLUME RATE LAW |
| 690 | 1 | 0 | |a YTTRIUM BARIUM COPPER OXIDE |
| 690 | 1 | 0 | |a OXIDE SUPERCONDUCTORS |
| 650 | 1 | 7 | |2 spines |a PH |
| 700 | 1 | |a Blesa, M.A. | |
| 700 | 1 | |a Regazzoni, A.E. | |
| 773 | 0 | |d Springer Netherlands, 1996 |g v. 31 |h pp. 54-60 |k n. 1 |p J Mater Sci |x 00222461 |w (AR-BaUEN)CENRE-5658 |t Journal of Materials Science | |
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| 856 | 4 | 0 | |u https://doi.org/10.1007/BF00355126 |y DOI |
| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_00222461_v31_n1_p54_Candal |y Handle |
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| 999 | |c 64375 | ||