Effect of Oxygen Partial Pressure on Electrical Conductivity of Ca-Ru-O Compounds Prepared by Spark Plasma Sintering

Nittaya Keawprak; Rong Tu; Takashi Goto

doi:10.4028/www.scientific.net/MSF.561-565.595

Paper Titles

Densification and α/β Phase Transformation of SHS Si₃N₄ Containing Al₂O₃ and Y₂O₃ during Sintering
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Zinc Oxide Ceramics with High Mobility as n-Type Thermoelectric Materials
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Preparation and Characterization of β-SiAlON Ceramics from High Aluminium Fly Ash via Carbothermal Reduction-Nitridation
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XRD and HRTEM Study of Zirconia Nanoparticles Synthesized by Laser Ablation
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Effect of Oxygen Partial Pressure on Electrical Conductivity of Ca-Ru-O Compounds Prepared by Spark Plasma Sintering
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Spark Plasma Sintering of βSiAlON-cBN Composite
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Fabrication of Alumina and Silicon Carbide Fibers from Carbon Fibers
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Fabrication and Electrical Property of SiC-AlN Composites
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Effect of Calcination on Mechanical Properties of Hydroxyapatite / Zirconia Composite Sintered by Spark Plasma Sintering
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HomeMaterials Science ForumMaterials Science Forum Vols. 561-565Effect of Oxygen Partial Pressure on Electrical...

Effect of Oxygen Partial Pressure on Electrical Conductivity of Ca-Ru-O Compounds Prepared by Spark Plasma Sintering

Abstract:

Ca-Ru-O compounds were prepared by spark plasma sintering (SPS) using CaCO3 and RuO2 powders at various molar ratio of Ru to Ca (RRu/Ca). CaRuO3 in a single phase was obtained at RRu/Ca = 1.0. A non-stoichiometric solid solution range of CaRuO3 was identified at RRu/Ca = 0.7 to 1.0. The electrical conductivity (σ) showed metallic conduction behavior and increased with increasing RRu/Ca. The electrical conductivity at RRu/Ca = 0.8 to 1.0 increased with decreasing oxygen partial pressure (PO2) and the PO2 dependence of σ became significant with increasing temperature.