Electrical properties, EPR analyses and defect chemistry of Mn-doped 0.675PMN-0.325PT piezoceramics. Issue 18 (15th December 2020)

• Record Type: Journal Article
• Authors: Berksoy-Yavuz, Ayse; Mensur-Alkoy, Ebru; Erdem, Emre; Alkoy, Sedat
• Is Part Of: Ceramics international. Volume 46:Issue 18(2020)Part A
• Page Start: 28980
• Page End: 28986
• Publication Date: 2020-12-15
• Subjects: PMN-PT -- Sintering -- Electrical properties -- Electron paramagnetic resonance (EPR); Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.08.069
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The morphotropic phase boundary solid solution of 0.675Pb(Mg1/3 Nb2/3 )O3 -0.325PbTiO3 (0.675PMN-0.325PT) were studied. Manganese (Mn) was used as a dopant element in 0.4 mol% and 0.7 mol% ratios because of its multiple oxidation states. Sintering was done either in the air or under an oxygen-rich atmosphere. Both the effect of doping and sintering atmosphere on the electrical properties were reported. The ceramic with 0.4 mol% were exhibited higher properties such as piezoelectric charge coefficient ( d 33 ), dielectric constant, polarization values compared to undoped and 0.7 mol% Mn-doped ceramics. Electron paramagnetic resonance (EPR) spectroscopy was used to resolve the oxidation state of Mn in the 0.675PMN-0.325PT structure. The electrical properties were discussed and explained using defect chemistry.