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Extremely Enhanced Nonlinear Current–Voltage Properties of Tb‐Doped CaCu 3 Ti 4 O 12 Ceramics
Author(s) -
Thongbai Prasit,
Boonlakhorn Jakkree,
Putasaeng Bundit,
Yamwong Teerapon,
Maensiri Santi
Publication year - 2013
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12157
Subject(s) - doping , materials science , grain boundary , analytical chemistry (journal) , ceramic , grain size , chemistry , microstructure , composite material , optoelectronics , chromatography
Nonlinear current–voltage properties of CaCu 3 Ti 4 O 12 ceramics were extremely enhanced by doping with Tb . Substitution of Tb to CaCu 3 Ti 4 O 12 resulted in a decrease in grain size due to the ability of Tb ions to inhibit grain boundary mobility. The dielectric properties of CaCu 3 Ti 4 O 12 ceramics were degraded after doping with Tb . Surprisingly, the nonlinear electrical properties were strongly enhanced. The best properties with a nonlinear coefficient of ~29.67 and breakdown electric field strength of ~1.52 × 10 4 V/cm were obtained in the Ca 0.775 Tb 0.15 Cu 3 Ti 4 O 12 ceramic. These extremely enhanced properties were attributed to modification of grain boundary electrical response due to the effect Tb substitution.