Structure and conductivity of NiO/YSZ composite prepared via modified glycine-nitrate process at varying sintering temperatures |
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| Affiliation: | 1. Department of Engineering Science, University of the Philippines Los Baños, College, Laguna 4031, Philippines;2. Advanced Materials for Energy Research Laboratory, Department of Mining, Metallurgical and Materials Engineering, College of Engineering, University of the Philippines Diliman, Quezon City 1101, Philippines;1. Centre for Nanoscience and Nanotechnology, Sathyabama Institute of Science and Technology, Chennai–600119, India;2. Corrosion Science and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam–603102, India;3. Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, HBNI, Kalpakkam–603102, India;4. UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore–452017, India;5. Centre of Advanced Study in Geology, Banaras Hindu University, Varanasi–221005, India;1. Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University,Suzhou 215123, China;2. Center of Analysis and Testing, Soochow University, Suzhou 215123, China;1. CMR-Prototech, Fantoftveien 38, 5892 Bergen, Norway;2. Faculty of Physics, Babes-Bolyai University, 400084 Cluj-Napoca, Romania;3. Department of Physics and Technology, University of Bergen, Allégaten 55, 5007 Bergen, Norway |
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| Abstract: | Nickel oxide and Yttria-stabilized zirconia (NiO/YSZ) composite is one of the most promising mixed conducting electrode materials in both solid oxide electrolysis cell and solid oxide fuel cell applications. In this study, 50 wt% NiO and 50 wt% YSZ composite was synthesized via a modified glycine-nitrate combustion process (GNP) and the effect of sintering temperatures (1100 °C, 1300 °C and 1500 °C) on its microstructure and electrical properties were investigated. TG/DTA and in-situ high temperature XRD revealed the thermal property behavior and the structural changes of the as-combusted precursor material. For all the samples sintered at different temperatures, room temperature XRD patterns revealed a distinct cubic phases of both YSZ and NiO while SEM images showed a porous microstructure. The total conductivities at 700 °C are 9.87 × 10−3, 5.26 × 10−3, 4.02 × 10−3 S/cm for the 1100, 1300, and 1500 °C with activation energies of 0.1722, 0.3555, and 0.3768 eV, respectively. Conductivity measurements of the different sintered samples revealed that the total conductivities as well as the activation energies are greatly affected by different sintering temperatures. |
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| Keywords: | Combustion method Conductivity NiO/YSZ Sintering |
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