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Colossal permittivity and dielectric behaviour of (Nb₀.₅Fe₀.₅)₀.₁Ti₀.₉O₂ and (Ta₀.₅Fe₀.₅)₀.₁Ti₀.₉O₂ ceramics

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cris.virtual.department Universiti Malaysia Perlis
cris.virtual.department Universiti Malaysia Perlis
cris.virtualsource.department 5deb7039-bc31-46fb-a2b4-92c94fd859d7
cris.virtualsource.department 9be39179-9de1-4515-94b2-a2cba5a24c7f
dc.contributor.author Ku Noor Dhaniah Ku Muhsen
dc.contributor.author Rozana Aina Maulat Osman
dc.contributor.author Mohd Sobri Idris
dc.date.accessioned 2026-01-05T03:43:52Z
dc.date.available 2026-01-05T03:43:52Z
dc.date.issued 2023
dc.description.abstract The influence of pentavalent elements (Nb⁵⁺, Ta⁵⁺) with Fe³⁺ on TiO₂ ceramic were investigated. The (Nb₀.₅Fe₀.₅)₀.₁Ti₀.₉O₂ and (Ta₀.₅Fe₀.₅)₀.₁Ti₀.₉O₂ ceramics have been synthesized and realized that the effect of Nb in the system has developed lattice expansion, although Nb and Ta exhibit similar ionic radii. The colossal permittivity value for (Nb₀.₅Fe₀.₅)₀.₁Ti₀.₉O₂ ceramic is about εr ≥ 104 which is slightly higher than the (Ta₀.₅Fe₀.₅)₀.₁Ti₀.₉O₂ ceramic. According to the dielectric analysis, both ceramics exhibit colossal permittivity below 10³ Hz which contributed by the electron-pinned defect-dipole (EPDD) model. However, the low εr values in the high-frequency region are associated with the internal barrier layer capacitor (IBLC) model. In addition, the grain boundary resistance is far greater than the grain resistivity (Rgb≫ Rg) which confirmed the existence of the IBLC effect by equivalent circuit analysis.
dc.identifier.doi 10.1007/s10854-023-10155-w
dc.identifier.uri https://link.springer.com/content/pdf/10.1007/s10854-023-10155-w.pdf
dc.identifier.uri https://link.springer.com/article/10.1007/s10854-023-10155-w?utm_source=getftr&utm_medium=getftr&utm_campaign=getftr_pilot&getft_integrator=scopus
dc.identifier.uri https://link.springer.com/
dc.identifier.uri https://hdl.handle.net/20.500.14170/15616
dc.language.iso en
dc.publisher Springer Nature
dc.relation.ispartof Journal of Materials Science: Materials in Electronics
dc.relation.issn 0957-4522
dc.relation.issn 1573-482X
dc.subject Equivalent circuits
dc.subject Grain boundaries
dc.subject High-k dielectric
dc.subject Iron compounds
dc.subject Niobium
dc.subject Niobium compounds
dc.subject Permittivity
dc.subject Tantalum
dc.title Colossal permittivity and dielectric behaviour of (Nb₀.₅Fe₀.₅)₀.₁Ti₀.₉O₂ and (Ta₀.₅Fe₀.₅)₀.₁Ti₀.₉O₂ ceramics
dc.type journal-article
dspace.entity.type Publication
oaire.citation.endPage 11
oaire.citation.issue 9
oaire.citation.startPage 1
oaire.citation.volume 34
oairecerif.author.affiliation Universiti Malaysia Perlis
oairecerif.author.affiliation Universiti Malaysia Perlis
oairecerif.author.affiliation Universiti Malaysia Perlis
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Colossal permittivity and dielectric behaviour of (Nb₀.₅Fe₀.₅)₀.₁Ti₀.₉O₂ and (Ta₀.₅Fe₀.₅)₀.₁Ti₀.₉O₂ ceramics.pdf
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