Effect of synthesis method on the long-range order of the space charge type in 0.75PFW–0.25PT ceramics

• Published in: Journal of alloys and compounds Vol. 497; no. 1; pp. 436 - 441
• Main Authors: Hong, Cheng-Shong, Chu, Sheng-Yuan, Su, Wen-Chang
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 14.05.2010; Elsevier
• Subjects: Alloys; Ceramics; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dielectric breakdown and space-charge effects; Dielectric loss and relaxation; Dielectric properties of solids and liquids; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Diffused phase transition; Diffusion; Exact sciences and technology; Mathematical models; Order; Order disorder; Oxides; Physics; Polarization; Relaxor; Space charge; Space charge polarization; Order; Diffused phase transition; Relaxor; Space charge polarization; Polarization; Lead titanates; Transition element compounds; Empirical method; Long-range order; Space charge; Low field; Iron Lead Tungstates Mixed; Dielectric losses; Ordering; Property structure relationship
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2010.03.096

In this paper, 0.75Pb(Fe 2/3W 1/3)O 3–0.25PbTiO 3(0.75PFW–0.25PT) ceramics are synthesized by two different methods, the conventional direct oxide synthesized (DS) method and the two-step indirect synthesized (IS) method. The low-field dielectric response is investigated by using the empirical law, the ordering model and the space charge polarization. Due to the IS method, the degree of diffused phase transition is decreased, the space charge polarization is enhanced and the dielectric loss is increased. Therefore, it is concluded that the ordering degree of B-site cations is enhanced based on the space charge type by using the IS synthesized method.