Effect of concentration of Sm2O3 and Yb2O3 and synthesizing temperature on electrical and crystal structure of (Bi2O3)(1-x-y)(Sm2O3)(x)(Yb2O3)(y) electrolytes fabricated for IT-SOFCs
| Autor: | Nalan Çiçek Bezir, Refik Kayali, Atilla Evcin, Mürivet Kaşıkcı Özen |
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| Přispěvatelé: | Evcin, Atilla -- 0000-0002-0163-5097, [Kayali, Refik -- Ozen, Murivet Kasikci] Nigde Univ, Sci Literature Fac, Dept Phys, Nigde, Turkey -- [Bezir, Nalan Cicek] Suleyman Demirel Univ, Sci Literature Fac, Dept Phys, TR-32200 Isparta, Turkey -- [Evcin, Atilla] Afyon Kocatepe Univ, Fac Engn, Dept Mat Sci & Engn, Afyon, Turkey, 0-Belirlenecek |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Scanning electron microscope Analytical chemistry 02 engineering and technology Activation energy Conductivity 010402 general chemistry 01 natural sciences symbols.namesake Ionic conductivity Differential thermal analysis Electrical and Electronic Engineering Arrhenius equation 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Electronic Optical and Magnetic Materials Powder Diffractometer Arrhenius symbols Solid state ceramic technique 0210 nano-technology Ternary operation |
| Popis: | WOS: 000373092100007 For intermediate temperature solid oxide fuel cells (IT-SOFCs), (Bi2O3)(1-x-y)(Sm2O3)(x)(Yb2O3)(y) ternary systems (x=0.01 and y = 0.11), (x=0.05 andy= 0.07), (x=0.07 and y=0.05), and (x=0.11 and y=0.01) as electrolytes have been fabricated at different temperatures (700, 750, and 800 degrees C) by solid state ceramic technique (SST). The characterization of the samples has been performed by X-ray powder diffractometer (XRD), scanning electron microscopy (SEM), four point-probe method (FPPM), X-ray energy diffraction spectroscopy (EDX), and differential thermal analysis (DTA). XRD measurements have shown that only the samples (Bi2O3)(1-x-y)(Sm2O3)(x)(Yb2O3)(y) (x=0.01, y=0.11 synthesized at 700, 750, and 800 degrees C) and (x=0.05, y=0.07 synthesized at 800 degrees C) have stable fluorite type face centered cubic (FCC) delta-phase. SEM images have shown the morphology of the stable samples. The conductivity and the operation temperature region of the samples have been determined from Arrhenius curves obtained from the FPPM measurements data and they vary from 1.83 to 9.95 x 10(-1) S cm(-1). Moreover, activation energy of the samples have been calculated by means of Arrhenius curves of the samples and relationships between them and the conductivity of the samples have been investigated in detail. The results obtained from XRD and FPPM measurements were confirmed by the DTA measurements. (C) 2016 Elsevier B.V. All rights reserved. Nigde University Research Projects Unit [FEB 2011/04] This work was financially supported by Nigde University Research Projects Unit under the grant no. FEB 2011/04. |
| Databáze: | OpenAIRE |
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