Alkaline Earth Elements Modified Lead-Free 0.96(K0.5Na0.5)NbO3–0.04LiTaO3Ceramics

Autor:	Ying Yang, Yiping Wang, Dandan Wan, Yu Cheng, Qian Li, Hanqi Meng
Rok vydání:	2010
Předmět:	Permittivity Phase boundary Tetragonal crystal system Piezoelectric coefficient Materials science Sintering Dielectric loss Dielectric Composite material Condensed Matter Physics Microstructure Electronic Optical and Magnetic Materials
Zdroj:	Ferroelectrics. 404:105-111
ISSN:	1563-5112 0015-0193
DOI:	10.1080/00150193.2010.482461
Popis:	Lead-free 0.96(K0.5Na0.5)NbO3–0.04LiTaO3 + x% MgO ceramics with x = 0.00, 0.25, 0.50, 0.75 and 1.00 were prepared by conventional solid-state sintering technique. The effects of MgO on the phase transitional behavior, microstructure, piezoelectric and dielectric properties were investigated. 0.96(K0.5Na0.5)NbO3–0.04LiTaO3 ceramics were chosen because of their high piezoelectric coefficient d 33 and electromechanical coupling factor k p. These samples exhibit a polymorphic phase transition from orthorhombic to tetragonal symmetry near the room temperature, which is analogous to the morphtropic phase boundary (MPB). In order to further improve the piezoelectric and dielectric characteristics meanwhile decrease sintering temperature, alkaline earth element Mg had been doped in 0.96(K0.5Na0.5)NbO3–0.04LiTaO3 ceramics. Our results show that the doping of MgO could not only improve the sintering performance but also be effective on promoting the dielectric properties.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::70ca6f3be1adeeecb2410218105880a8 https://doi.org/10.1080/00150193.2010.482461 Zobrazit plný text záznamu