Multiple dielectric anomalies in xBiLaO3–(1 − x)PbTiO3 piezoelectrics

Autor:	Robert F. Speyer, Michael S. Haluska, Runrun Duan
Rok vydání:	2008
Předmět:	Diffraction Materials science Mechanical Engineering Dielectric Condensed Matter Physics Piezoelectricity law.invention Crystallography Tetragonal crystal system Differential scanning calorimetry Mechanics of Materials law General Materials Science Calcination Endotherm Dielectric anomaly
Zdroj:	Journal of Materials Research. 23:565-569
ISSN:	2044-5326 0884-2914
DOI:	10.1557/jmr.2008.0074
Popis:	Compositions of xBiLaO3–(1 − x) PbTiO3 over the range 0 ≤ x ≤ 0.225 were calcined and sintered. The dielectric constant with temperature and differential scanning calorimetry measurements were in excellent agreement with respect to Curie-like tetragonal to cubic transformations starting at 495 °C for pure PbTiO3, shifting to lower temperatures with increasing x. For compositions of x ≥ 0.05, a second higher-temperature (∼600 °C) endotherm, and matching dielectric anomaly, were consistently observed, for which there were no structural changes indicated by hot-stage x-ray diffraction. This transformation was speculated to be based on a thermally induced desegregation of B-site cations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e8fef52f3a3acea4402e4a85beb2d173 https://doi.org/10.1557/jmr.2008.0074 Zobrazit plný text záznamu Full text from SpringerLink