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dc.contributor.author | Ros, F.C. | - |
dc.contributor.author | Reeves-McLaren, N. | - |
dc.contributor.author | Masó, Nahum | - |
dc.contributor.author | West, A.R. | - |
dc.date.accessioned | 2020-05-05T10:31:35Z | - |
dc.date.available | 2020-05-05T10:31:35Z | - |
dc.date.issued | 2018-09-24 | - |
dc.identifier | doi: 10.1007/s41779-018-0236-x | - |
dc.identifier | issn: 2510-1579 | - |
dc.identifier.citation | Journal of the Australian Ceramic Society 55: 305-314 (2019) | - |
dc.identifier.uri | http://hdl.handle.net/10261/210460 | - |
dc.description.abstract | Eight new phases with the general formula of ABC O with different rare earth, (Zr, Hf), (Nb, Ta) combinations, have been prepared by solid-state reactions at a temperature range of 1200–1500 °C. The new phases—LaHfTa, LaHfNb, LaZrNb, PrHfTa, NdHfTa, NdHfNb, SmHfTa and GdHfTa—are characterised by X-ray and neutron diffraction data at room temperature and variable frequency impedance measurements. They are isostructural with LaZrTa O which consist of alternating single layers of UO pentagonal bipyramids and octahedra as shown by Rietveld refinement of X-ray and neutron powder diffraction data. Lattice parameters decrease with decreasing size of rare earth element substitution at A-site, and of all, Gd is the smallest rare earth that formed LaZrTa O analogues. Detailed attempts of attained and unattainable LaZrTa O analogues with different temperatures are included in this paper. All phases are highly insulating with temperature-independent bulk permittivities in the range 17 to 50; LaHfNb demonstrates the highest permittivity. Arrhenius plot shows that the activation energies are in the range 0.8 to 1.94 eV. | - |
dc.description.sponsorship | We thank EPSRC and the Ministry of Higher Education of Malaysia for their financial support through the research grant of Fundamental Research Grant Scheme (FRGS) no. FRGS/1/ 2017/STG07/UPNM/02/2. | - |
dc.language | eng | - |
dc.publisher | Springer Nature | - |
dc.relation.isversionof | Publisher's version | - |
dc.rights | openAccess | - |
dc.title | Synthesis, structure and dielectric properties of a new family of phases, ABC 3 O 11 : A = La, Pr, Nd, Sm, Gd; B = Zr, Hf; C = Ta, Nb | - |
dc.type | artículo | - |
dc.identifier.doi | 10.1007/s41779-018-0236-x | - |
dc.relation.publisherversion | http://dx.doi.org/10.1007/s41779-018-0236-x | - |
dc.date.updated | 2020-05-05T10:31:35Z | - |
dc.relation.csic | Sí | - |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.fulltext | With Fulltext | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | artículo | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
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Synthesis, structure and dielectric properties of a new family... Ros2019_Article_SynthesisStructureAndDielectri.pdf | 1,63 MB | Adobe PDF | Visualizar/Abrir |
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