Nanoindentation study of Cu doped NaCo2O4 ceramics
Апстракт
Thermoelectric materials, such as layered cobalt oxides, have been the subject of many theoretical and experimental investigations in past decade as potential candidates for application in energy conversion. In this work, polycrystalline samples of NaCo2-xCuxO4 (x = 0, 0.01, 0.03, 0.05) were synthesized from the powder precursors obtained by the citric acid complex method (CAC) and mechanochemically assisted solid state reaction method (MASSR). The obtained powders were uniaxially pressed into disc-shaped pellets and subsequently sintered at 880 °C in inert argon atmosphere. Indentation experiments were carried out to investigate mechanical properties. The hardness (H) and the Young's modulus of elasticity (Y) were determined using Agilent Nanoindenter G200. The surface approach velocity of the indenter (Berkovich pyramid) and Poisson ratio were set to 10 nm/s and 0.25, respectively. It was found that the highest Y (65.2 GPa) and H (1.41 GPa) were obtained for the CAC sample containing... 1mol% of Cu. These results indicated a significant improvement of mechanical properties even in the case of the sample with the lowest dopant concentration.
Кључне речи:
Thermoelectrics / Nanoindentation / Hardness / Young's modulus / Mechanical propertiesИзвор:
5th Conference of the Serbian Society for Ceramic Materials, 2019, 132-Издавач:
- Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia
Финансирање / пројекти:
- info:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45007/RS (-)
Институција/група
Institut za multidisciplinarna istraživanjaTY - CONF AU - Perać, Sanja AU - Savic, Slavica AU - Kojic, Sanja AU - Branković, Zorica AU - Branković, Goran PY - 2019 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/2308 AB - Thermoelectric materials, such as layered cobalt oxides, have been the subject of many theoretical and experimental investigations in past decade as potential candidates for application in energy conversion. In this work, polycrystalline samples of NaCo2-xCuxO4 (x = 0, 0.01, 0.03, 0.05) were synthesized from the powder precursors obtained by the citric acid complex method (CAC) and mechanochemically assisted solid state reaction method (MASSR). The obtained powders were uniaxially pressed into disc-shaped pellets and subsequently sintered at 880 °C in inert argon atmosphere. Indentation experiments were carried out to investigate mechanical properties. The hardness (H) and the Young's modulus of elasticity (Y) were determined using Agilent Nanoindenter G200. The surface approach velocity of the indenter (Berkovich pyramid) and Poisson ratio were set to 10 nm/s and 0.25, respectively. It was found that the highest Y (65.2 GPa) and H (1.41 GPa) were obtained for the CAC sample containing 1mol% of Cu. These results indicated a significant improvement of mechanical properties even in the case of the sample with the lowest dopant concentration. PB - Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia C3 - 5th Conference of the Serbian Society for Ceramic Materials T1 - Nanoindentation study of Cu doped NaCo2O4 ceramics SP - 132 UR - https://hdl.handle.net/21.15107/rcub_rimsi_2308 ER -
@conference{ author = "Perać, Sanja and Savic, Slavica and Kojic, Sanja and Branković, Zorica and Branković, Goran", year = "2019", abstract = "Thermoelectric materials, such as layered cobalt oxides, have been the subject of many theoretical and experimental investigations in past decade as potential candidates for application in energy conversion. In this work, polycrystalline samples of NaCo2-xCuxO4 (x = 0, 0.01, 0.03, 0.05) were synthesized from the powder precursors obtained by the citric acid complex method (CAC) and mechanochemically assisted solid state reaction method (MASSR). The obtained powders were uniaxially pressed into disc-shaped pellets and subsequently sintered at 880 °C in inert argon atmosphere. Indentation experiments were carried out to investigate mechanical properties. The hardness (H) and the Young's modulus of elasticity (Y) were determined using Agilent Nanoindenter G200. The surface approach velocity of the indenter (Berkovich pyramid) and Poisson ratio were set to 10 nm/s and 0.25, respectively. It was found that the highest Y (65.2 GPa) and H (1.41 GPa) were obtained for the CAC sample containing 1mol% of Cu. These results indicated a significant improvement of mechanical properties even in the case of the sample with the lowest dopant concentration.", publisher = "Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia", journal = "5th Conference of the Serbian Society for Ceramic Materials", title = "Nanoindentation study of Cu doped NaCo2O4 ceramics", pages = "132", url = "https://hdl.handle.net/21.15107/rcub_rimsi_2308" }
Perać, S., Savic, S., Kojic, S., Branković, Z.,& Branković, G.. (2019). Nanoindentation study of Cu doped NaCo2O4 ceramics. in 5th Conference of the Serbian Society for Ceramic Materials Institut za multidisciplinarna istraživanja Kneza Višeslava 1, 11000 Belgrade, Serbia., 132. https://hdl.handle.net/21.15107/rcub_rimsi_2308
Perać S, Savic S, Kojic S, Branković Z, Branković G. Nanoindentation study of Cu doped NaCo2O4 ceramics. in 5th Conference of the Serbian Society for Ceramic Materials. 2019;:132. https://hdl.handle.net/21.15107/rcub_rimsi_2308 .
Perać, Sanja, Savic, Slavica, Kojic, Sanja, Branković, Zorica, Branković, Goran, "Nanoindentation study of Cu doped NaCo2O4 ceramics" in 5th Conference of the Serbian Society for Ceramic Materials (2019):132, https://hdl.handle.net/21.15107/rcub_rimsi_2308 .