Microstructural, Thermoelectric and Mechanical Properties of Cu Substituted NaCo2O4
Autori
Perać, SanjaM.Savić, Slavica
Branković, Zorica
Bernik, Slavko
Radojković, Aleksandar
Kojić, Sanja
Vasiljević, Dragana
Branković, Goran
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Polycrystalline samples of NaCo2−xCuxO4 (x = 0, 0.01, 0.03, 0.05) were obtained from powder precursors synthesized by a mechanochemically assisted solid-state reaction method (MASSR) and a citric acid complex method (CAC). Ceramic samples were prepared by pressing into disc-shaped pellets and subsequently sintering at 880 °C in an argon atmosphere. Effects of low concentrations of Cu doping and the above-mentioned synthesis procedures on the thermoelectric and mechanical properties were observed. The electrical resistivity (ρ), the thermal conductivity (κ) and the Seebeck coefficient (S) were measured simultaneously in the temperature gradient (ΔT) between the hot and cold side of the sample, and the figure of merit (ZT) was subsequently calculated. The ZT of the CAC samples was higher compared with the MASSR samples. The highest ZT value of 0.061 at ΔT = 473 K was obtained for the sample with 5 mol% of Cu prepared by the CAC method. The CAC samples showed better mechanical properties ...compared to the MASSR samples due to the higher hardness of the CAC samples which is a consequence of homogeneous microstructure and higher density obtained during sintering of these samples. The results confirmed that, besides the concentration of Cu, the synthesis procedure considerably affected the thermoelectric and mechanical properties of NaCo2O4 (NCO) ceramics.
Ključne reči:
microstructure / electrical resistivity / thermal conductivity / mechanical propertiesIzvor:
Materials, 2022, 15, 4470-Izdavač:
- MDPI
Finansiranje / projekti:
- Ministarstvo nauke, tehnološkog razvoja i inovacija Republike Srbije, institucionalno finansiranje - 200053 (Univerzitet u Beogradu, Institut za multidisciplinarna istraživanja) (RS-MESTD-inst-2020-200053)
- Ministarstvo nauke, tehnološkog razvoja i inovacija Republike Srbije, institucionalno finansiranje - 200358 (BioSense institut) (RS-MESTD-inst-2020-200358)
Institucija/grupa
Institut za multidisciplinarna istraživanjaTY - JOUR AU - Perać, Sanja AU - M.Savić, Slavica AU - Branković, Zorica AU - Bernik, Slavko AU - Radojković, Aleksandar AU - Kojić, Sanja AU - Vasiljević, Dragana AU - Branković, Goran PY - 2022 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/1561 AB - Polycrystalline samples of NaCo2−xCuxO4 (x = 0, 0.01, 0.03, 0.05) were obtained from powder precursors synthesized by a mechanochemically assisted solid-state reaction method (MASSR) and a citric acid complex method (CAC). Ceramic samples were prepared by pressing into disc-shaped pellets and subsequently sintering at 880 °C in an argon atmosphere. Effects of low concentrations of Cu doping and the above-mentioned synthesis procedures on the thermoelectric and mechanical properties were observed. The electrical resistivity (ρ), the thermal conductivity (κ) and the Seebeck coefficient (S) were measured simultaneously in the temperature gradient (ΔT) between the hot and cold side of the sample, and the figure of merit (ZT) was subsequently calculated. The ZT of the CAC samples was higher compared with the MASSR samples. The highest ZT value of 0.061 at ΔT = 473 K was obtained for the sample with 5 mol% of Cu prepared by the CAC method. The CAC samples showed better mechanical properties compared to the MASSR samples due to the higher hardness of the CAC samples which is a consequence of homogeneous microstructure and higher density obtained during sintering of these samples. The results confirmed that, besides the concentration of Cu, the synthesis procedure considerably affected the thermoelectric and mechanical properties of NaCo2O4 (NCO) ceramics. PB - MDPI T2 - Materials T1 - Microstructural, Thermoelectric and Mechanical Properties of Cu Substituted NaCo2O4 SP - 4470 VL - 15 DO - 10.3390/ma15134470 ER -
@article{ author = "Perać, Sanja and M.Savić, Slavica and Branković, Zorica and Bernik, Slavko and Radojković, Aleksandar and Kojić, Sanja and Vasiljević, Dragana and Branković, Goran", year = "2022", abstract = "Polycrystalline samples of NaCo2−xCuxO4 (x = 0, 0.01, 0.03, 0.05) were obtained from powder precursors synthesized by a mechanochemically assisted solid-state reaction method (MASSR) and a citric acid complex method (CAC). Ceramic samples were prepared by pressing into disc-shaped pellets and subsequently sintering at 880 °C in an argon atmosphere. Effects of low concentrations of Cu doping and the above-mentioned synthesis procedures on the thermoelectric and mechanical properties were observed. The electrical resistivity (ρ), the thermal conductivity (κ) and the Seebeck coefficient (S) were measured simultaneously in the temperature gradient (ΔT) between the hot and cold side of the sample, and the figure of merit (ZT) was subsequently calculated. The ZT of the CAC samples was higher compared with the MASSR samples. The highest ZT value of 0.061 at ΔT = 473 K was obtained for the sample with 5 mol% of Cu prepared by the CAC method. The CAC samples showed better mechanical properties compared to the MASSR samples due to the higher hardness of the CAC samples which is a consequence of homogeneous microstructure and higher density obtained during sintering of these samples. The results confirmed that, besides the concentration of Cu, the synthesis procedure considerably affected the thermoelectric and mechanical properties of NaCo2O4 (NCO) ceramics.", publisher = "MDPI", journal = "Materials", title = "Microstructural, Thermoelectric and Mechanical Properties of Cu Substituted NaCo2O4", pages = "4470", volume = "15", doi = "10.3390/ma15134470" }
Perać, S., M.Savić, S., Branković, Z., Bernik, S., Radojković, A., Kojić, S., Vasiljević, D.,& Branković, G.. (2022). Microstructural, Thermoelectric and Mechanical Properties of Cu Substituted NaCo2O4. in Materials MDPI., 15, 4470. https://doi.org/10.3390/ma15134470
Perać S, M.Savić S, Branković Z, Bernik S, Radojković A, Kojić S, Vasiljević D, Branković G. Microstructural, Thermoelectric and Mechanical Properties of Cu Substituted NaCo2O4. in Materials. 2022;15:4470. doi:10.3390/ma15134470 .
Perać, Sanja, M.Savić, Slavica, Branković, Zorica, Bernik, Slavko, Radojković, Aleksandar, Kojić, Sanja, Vasiljević, Dragana, Branković, Goran, "Microstructural, Thermoelectric and Mechanical Properties of Cu Substituted NaCo2O4" in Materials, 15 (2022):4470, https://doi.org/10.3390/ma15134470 . .