Thermal evolution of CaO-doped HfO2 films and powders
被引:4
作者:
Barolin, S. A.
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h-index: 0
机构:
Univ Nacl Rosario, Lab Mat Ceramicos, FCEIyA, IFIR CONICET, RA-2000 Rosario, Santa Fe, ArgentinaUniv Nacl Rosario, Lab Mat Ceramicos, FCEIyA, IFIR CONICET, RA-2000 Rosario, Santa Fe, Argentina
Barolin, S. A.
[1
]
Caracoche, M. C.
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h-index: 0
机构:Univ Nacl Rosario, Lab Mat Ceramicos, FCEIyA, IFIR CONICET, RA-2000 Rosario, Santa Fe, Argentina
Caracoche, M. C.
Martinez, J. A.
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h-index: 0
机构:Univ Nacl Rosario, Lab Mat Ceramicos, FCEIyA, IFIR CONICET, RA-2000 Rosario, Santa Fe, Argentina
Martinez, J. A.
Rivas, P. C.
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h-index: 0
机构:Univ Nacl Rosario, Lab Mat Ceramicos, FCEIyA, IFIR CONICET, RA-2000 Rosario, Santa Fe, Argentina
Rivas, P. C.
Taylor, M. A.
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h-index: 0
机构:Univ Nacl Rosario, Lab Mat Ceramicos, FCEIyA, IFIR CONICET, RA-2000 Rosario, Santa Fe, Argentina
Taylor, M. A.
Pasquevich, A. F.
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机构:Univ Nacl Rosario, Lab Mat Ceramicos, FCEIyA, IFIR CONICET, RA-2000 Rosario, Santa Fe, Argentina
Pasquevich, A. F.
de Sanctis, O. A.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Nacl Rosario, Lab Mat Ceramicos, FCEIyA, IFIR CONICET, RA-2000 Rosario, Santa Fe, ArgentinaUniv Nacl Rosario, Lab Mat Ceramicos, FCEIyA, IFIR CONICET, RA-2000 Rosario, Santa Fe, Argentina
de Sanctis, O. A.
[1
]
机构:
[1] Univ Nacl Rosario, Lab Mat Ceramicos, FCEIyA, IFIR CONICET, RA-2000 Rosario, Santa Fe, Argentina
来源:
XIX LATIN AMERICAN SYMPOSIUM ON SOLID STATE PHYSICS (SLAFES)
|
2009年
/
167卷
关键词:
SOL-GEL PROCESS;
PHASE-STRUCTURE;
PERCENT Y2O3;
D O I:
10.1088/1742-6596/167/1/012052
中图分类号:
TB3 [工程材料学];
学科分类号:
0805 ;
080502 ;
摘要:
Solid solutions of ZrO2 and HfO2 are potential electrolyte materials for intermediate-temperature SOFC because both are oxygen-ion conductors. The main challenge for these compounds is to reduce the relatively high value of the activation energies vacancies diffusion, which is influenced by several factors. In this work the thermal evolution of CaO-HfO2 materials have been investigated. (CaO) y-Hf(1-y)O(2-y) (y = 0.06, 0.14 y 0.2) coatings and powders were synthesized by chemical solution deposition (CSD). Films were deposited onto alumina substrates by Dip Coating technique, the burning of organic waste was carried out at 500 degrees C under normal atmosphere and then the films were thermally treated at intervals of temperature rising to a maximum temperature of 1250 degrees C. By means Glazing Incidence X-ray Diffraction (phi-2 theta configuration) the phases were studied in the annealed films. On the other hand, the thermal evolution and crystallization process of powders were analyzed in-situ by HT-XRD. The phenomena crystallization occurred in films and powders were analyzed. The activation energies of diffusion of oxygen vacancies of HfO2-14 mole% CaO and HfO2-20 mole% CaO films were measured from the thermal evolution of the relaxation constant measured by Perturbed Angular Correlation Technique.