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- W2926355556 abstract "Ca2.93Na0.07Co4Oy/x wt% K2CO3 (x = 0.00, 0.01, and 0.03) polycrystalline ceramics were prepared by conventional solid-state method. XRD results have shown that all samples predominantly include Ca3Co4O9 phase together with small amounts of secondary phases. SEM images show that all samples have randomly oriented plate-like grains in different sizes. The electrical resistivity measurement showed that electrical properties of Ca3Co4O9 ceramics can be improved significantly by both, Na doping and K addition at their optimal values. The effect of dopants on thermoelectric properties of Ca3Co4O9 was examined by both, Seebeck coefficient and power factor, being higher in K-added than in the pure samples, indicating that thermoelectric properties of samples are positively affected when alkaline elements enter into their structure." @default.
- W2926355556 created "2019-04-11" @default.
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- W2926355556 date "2019-03-29" @default.
- W2926355556 modified "2023-09-30" @default.
- W2926355556 title "Improving thermoelectric properties of Ca3Co4O9+δ through both Na doping and K addition at optimal values" @default.
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- W2926355556 doi "https://doi.org/10.1007/s10854-019-01209-z" @default.
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