학술논문
Effects of Sintering Temperature on the Electric Properties of Mn-modified BiFeO3-BaTiO3 Bulk Ceramics
Document Type
Article
Source
Journal of the Korean Physical Society, 66(7), pp.1115-1119 Apr, 2015
Subject
Language
English
ISSN
1976-8524
0374-4884
0374-4884
Abstract
Mn-modified 0.67Bi1.05FeO3-0.33BaTiO3 ceramics were prepared via a solid-state reaction processby using a quenching method after a sintering process at various temperatures. We obtainedceramics with improved electric properties within a narrow sintering temperature range. At theoptimized sintering temperature of 990◦C, improved ferroelectric and piezoelectric properties wereobserved in the 1-mol% Mn-modified ceramic. The small-field and the large-field piezoelectricconstants (d33 and d∗33) were 135 pC/N and 250 pm/V, respectively, and the leakage current densitywas about 2.4 × 10−7 A/cm2. The remnant polarization (Pr) and the coercive field (Ec) were 29μC/cm2 and 28 kV/cm, respectively.