The study of dielectric diffuseness in the Ba(Mg1/3Nb2/3)O3–BaTiO3ceramic system

Autor: Tawee Tunkasiri, Kamonpan Pengpat, Jerapong Tontrakoon, Anocha Munpakdee
Rok vydání: 2006
Předmět:
Zdroj: Smart Materials and Structures. 15:1255-1259
ISSN: 1361-665X
0964-1726
Popis: The dielectric properties of Ba(Mg1/3Nb2/3)O3 (BMN)-substituted BaTiO3 (BT) (xBMN–(100−x)BT) ceramics, where x = 0–5 mol%, were prepared by a high-temperature solid-state reaction technique. It was found that the substitution of Mg2+ and Nb5+ at the Ti-site of the BMN–BT ceramics caused compositional inhomogeneity, leading to a diffuse phase transition (DPT). Discontinuous grain growth accompanied with excellent dielectric diffuseness was found in 3–5 mol% BMN specimens. The maximum solubility limit of Mg/Nb substitution was assumed to be between 3 2 mol%, the maximum dielectric constant decreased and the Curie temperature shifted downwards on the lower temperature side.
Databáze: OpenAIRE