Giant dielectric constants in K0.8M0.4Ti1.6O4 (M = Ni, Zn) lepidocrocite-type layered titanate ceramics
| dc.contributor.author | Maluangnont, Tosapol | |
| dc.contributor.author | Vittayakorn, Naratip | |
| dc.date.accessioned | 2026-08-06T10:23:51Z | |
| dc.date.available | 2026-08-06T10:23:51Z | |
| dc.date.issued | 2019-01-02 | |
| dc.description.abstract | We reported herein the temperature-dependent dielectric properties of K<inf>0.8</inf>M<inf>0.4</inf>Ti<inf>1.6</inf>O<inf>4</inf> (M = Ni, Zn) lepidocrocite titanate ceramics at the frequency f of 10<sup>3</sup>, 10<sup>4</sup> and 10<sup>5</sup> Hz. This titanate is an example of layered alkali titanium oxides possessing two-dimensional (2D) sheets of edge-shared TiO<inf>6</inf> octahedra, in contrast to other widely studied materials with mostly corner-shared TiO<inf>6</inf> motifs. The giant dielectric constants ε′ ∼10<sup>4</sup> and the dielectric losses tan δ ∼ 0.5–2 were obtained upon heating from RT to 250 °C. These values in our water-free ceramics are comparable to those previously reported in lepidocrocite titanate and related structures containing up to 15%wt water. The results were explained considering (i) Maxwell-Wagner polarization of interlayer species, and (ii) the possible formation of internal barrier layer capacitors (IBLCs) via the oxidized surfaces. | |
| dc.identifier.citation | Integrated Ferroelectrics, 195(1), 100-108, 2019 | |
| dc.identifier.doi | 10.1080/10584587.2019.1570024 | |
| dc.identifier.issn | 10584587 | |
| dc.identifier.other | 2-s2.0-85065484474 | |
| dc.identifier.uri | https://dspace.kmitl.ac.th/handle/123456789/9673 | |
| dc.source | Integrated Ferroelectrics | |
| dc.subject | alkali titanate | |
| dc.subject | dielectric properties | |
| dc.subject | layered structure | |
| dc.subject | Lepidocrocite | |
| dc.title | Giant dielectric constants in K0.8M0.4Ti1.6O4 (M = Ni, Zn) lepidocrocite-type layered titanate ceramics | |
| dc.type | Article |