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RESEARCH PRODUCT
Raman spectra and anomalies of dielectric properties and thermal expansion of lead-free (1−x)Na0.5Bi0.5TiO3-xSrTiO3 (x = 0, 0.08 and 0.1) ceramics
Andris SternbergPiotr CzajaK. KluczewskaE.m. DutkiewiczViktor BovtunJan SuchaniczMaija AntonovaK. KoniecznyB. Handkesubject
010302 applied physicsPermittivityPhase transitionMaterials scienceCondensed matter physicsRelaxation (NMR)02 engineering and technologyDielectric021001 nanoscience & nanotechnology01 natural sciencesThermal expansionTetragonal crystal systemsymbols.namesakePhase (matter)0103 physical sciencessymbolsGeneral Materials Science0210 nano-technologyRaman spectroscopyInstrumentationdescription
ABSTRACTThermal expansion, Raman and dielectric properties of the lead-free (1−x)Na0.5Bi0.5TiO3-xSrTiO3 (x = 0, 0.08 and 0.1) ceramic solid solutions, fabricated by the conventional solid-state reaction method, were investigated. The Sr-doping results in an increase of the dielectric permittivity, broadening of the permittivity maximum, enhancement of the relaxation near depolarization temperature, broadening of the Raman bands and shift of all anomalies toward lower temperatures. The observed effects are attributed to an increase of the degree of cationic disorder and enhancement of the relaxor-like features. Anomalies in the thermal expansion strain were observed at the temperatures corresponding to the dielectric anomalies but not related to any phase transitions. These anomalies are supposed to follow changes of the averaged unit cell volume in the temperature interval of tetragonal and rhombohedral phase coexistence.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-05-15 | Phase Transitions |