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Aliovalent substitutions in Ca3Co4O9 often result in complex effects on the electrical properties and the solubility, and impact of the substituting cation also depends largely on the preparation and processing method. It is also well-known that the monoclinic symmetry of this material’s composite crystal structure allows for a significant hole tra...
Journal Pre-proof Characterization and estimation of dielectric constant of electrospun BaTiO 3 nanofibers at different calcination temperatures using theoretical models Characterization and estimation of dielectric constant of electrospun BaTiO 3 nanofibers at different calcination temperatures using theoretical models
The main aim of this work was to estimate the dielectric constant of electrospun BaTiO 3 nanofibers (BT NF s) using theoretical models. The effect of calcination temperatures on morphology and crystal structure of BT NF s was also investigated by using SEM, TEM, XRD and Raman spectroscopy. The dielectric constant of BT NF s was calculated by applyi...
This paper reports a novel composite-based processing route for improving the electrical performance of Ca3Co4O9 thermoelectric (TE) ceramics. The approach involves the addition of metallic Co, acting as a pore filler on oxidation, and considers two simple sintering schemes. The (1-x)Ca3Co4O9/xCo composites (x = 0%, 3%, 6% and 9% vol.) have been pr...