Investigation of the dielectric properties of MnO-additive Pb(Fe2/3W1/3)–PbTiO3 relaxors prepared by two different methods
| Autor: | Cheng Shong Hong, Sheng-Yuan Chu, Ren Chuan Chang, Wen Chang Su, Hsiau Hsian Nien, Yung Der Juang |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Permittivity
Curie–Weiss law Dopant Condensed matter physics Mechanical Engineering Metals and Alloys Oxide Analytical chemistry Crystal structure Dielectric chemistry.chemical_compound chemistry Mechanics of Materials visual_art Materials Chemistry visual_art.visual_art_medium Dielectric loss Ceramic |
| Zdroj: | Journal of Alloys and Compounds. 460:658-667 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2007.06.068 |
| Popis: | In this paper, 0.75Pb(Fe 2/3 W 1/3 )O 3 –0.25PbTiO 3 –0.15 wt% MnO (0.75PFW–0.25PT–0.15 wt% MnO) ceramics are synthesized by two different methods, the conventional direct oxide synthesized (DS) method and two-step indirect synthesized (IS) method. The low-field dielectric responses are investigated by using the empirical law, the Curie–Weiss law, the modified-Landau theory and the spin-glass model. Due to the IS method, the lattice structure and the grain structure of the samples are changed. Furthermore, the dielectric properties are evidently modified. It is suggested that the ordering degree of B-site cations is enhanced by using the IS synthesized method. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect