Influence of lattice defects on the high pressure properties of Ni 0.66 Mn 2.3 4 O 4 NTC ceramics
Ceramics International, ISSN: 0272-8842, Vol: 49, Issue: 6, Page: 9412-9418
2023
- 4Citations
- 3Captures
- 1Mentions
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Most Recent News
Reports from Adam Mickiewicz University Describe Recent Advances in Ceramics Research (Influence of Lattice Defects On the High Pressure Properties of Ni0.66mn2.34o4 Ntc Ceramics)
2023 APR 12 (NewsRx) -- By a News Reporter-Staff News Editor at Tech Daily News -- Researchers detail new data in Technology - Ceramics Research.
Article Description
The properties and hence the applications of negative temperature coefficient (NTC) oxides, Ni x Mn 3-x O 4, strongly depend on the Ni:Mn ratio, valence states, defects and cation distribution in the spinel structure. Here, the accuracy of determination of nickel and manganese cations distribution in the spinel structure of Ni 0.66 Mn 2.34 O 4 oxide, has been improved by taking into account the presence of tetrahedral vacancies. Additionally, the structural stability of cubic Ni 0.66 Mn 2.34 O 4 was investigated as a function of pressure up to 9.5 GPa using synchrotron radiation angle-dispersive X-ray powder diffraction and a diamond anvil cell. The bulk modulus and its first derivative were determined by fitting the Birch-Murnaghan equation of state (EoS) model to the experimental pressure-volume data. Rietveld refinement of the X-ray powder diffraction data reveals that the cubic spinel structure is stable upon compression to 9.5 GPa. The XRD data yielded a bulk modulus of K 0 = 126(7) GPa, with a pressure derivative K′ = 12(2). The obtained data were discussed in terms of defects in the cationic sublattice and compared with the elastic parameters of NiMn 2 O 4.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0272884222041281; http://dx.doi.org/10.1016/j.ceramint.2022.11.106; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85142452000&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0272884222041281; https://dx.doi.org/10.1016/j.ceramint.2022.11.106
Elsevier BV
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