The study of dielectric diffuseness in the Ba(Mg1/3Nb2/3)O3–BaTiO3ceramic system
Autor: | Tawee Tunkasiri, Kamonpan Pengpat, Jerapong Tontrakoon, Anocha Munpakdee |
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Rok vydání: | 2006 |
Předmět: |
Permittivity
Phase transition Materials science Analytical chemistry Dielectric Condensed Matter Physics Atomic and Molecular Physics and Optics Lower temperature Grain growth Mechanics of Materials visual_art Signal Processing visual_art.visual_art_medium Curie temperature General Materials Science Ceramic Electrical and Electronic Engineering Solubility Civil and Structural Engineering |
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 |
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