Journal
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY
Volume 121, Issue 1-2, Pages 148-151Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.mseb.2005.03.023
Keywords
bismuth sodium titanate; dielectric properties; doping effects; phase transitions
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A-site replacement is common used in optimizing the electric properties of Bi0.5Na0.5TiO3 (abbreviated to BNT). The effect of Ba2+ doping in BNT capacitor ceramics is investigated here. After the samples containing 6 at.% Ba2+, was sintered at 1180 degrees C for 2 h, capacitor ceramics with enhanced dielectric properties was fabricated, compared with pure BNT ceramics. It can be concluded from the experiment results that Ba2+ replaced the ions in A-site, and the lattice structure was altered, which led to the improvement of dielectric properties in BNT ceramics. Then we discussed the phase transformation process from room temperature to 400 degrees C according to the dielectric properties-temperature graphs. (c) 2005 Elsevier B.V. All rights reserved.
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