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Piezoelectric Ceramics for Use in Multilayer Actuators and Energy Harvesters
Author(s) -
Hur Joon,
Seo InTae,
Kim DaeHyeon,
Nahm Sahn,
Ryu Jungho,
Han Seung Ho,
Kang ChongYun,
Yoon SeokJin
Publication year - 2014
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.13079
Subject(s) - ceramic , materials science , piezoelectricity , sintering , dielectric , phase boundary , composite material , analytical chemistry (journal) , mineralogy , phase (matter) , chemistry , optoelectronics , organic chemistry , chromatography
Microstructural and piezoelectric properties of 0.72 Pb ( Zr 1− x Ti x )–0.28 Pb ( Zn 0.4 Ni 0.6 ) 1/3 Nb 2/3 O 3 ( PZ 1− x T x ‐ PZNN ) ceramics with 0.50 ≤ x ≤ 0.55 were investigated for evaluating the possibility of their use in multilayer actuators and energy harvesters, which demand a large piezoelectric strain constant ( d 33 ) and a small dielectric constant (ε T 33 / ε o ). The PZ 0.47 T 0.53 ‐ PZNN ceramic with a morphotropic phase boundary (MPB) composition showed large d 33 and ε T 33 / ε o values, making it unsuitable for use in multilayer actuators and energy harvesters. However, the PZ 0.48 T 0.52 ‐ PZNN ceramic with a rhombohedral structure showed a small ε T 33 / ε o value of 1605, yet maintained a large d 33 of 550 pC/N. Thermal stimulation did not have any significant effect on the piezoelectric properties of this specimen, except for a slight increase in the ε T 33 / ε o value upon heating the specimen at 150°C for 4 h. In an effort to reduce the sintering temperature, CuO was used as an additive for the ceramic. As a result, the CuO‐added PZ 0.48 T 0.52 ‐PZNN ceramic was well sintered at 900°C. In particular, the 1.0 mol% CuO‐added PZ 0.48 T 0.52 ‐PZNN ceramic exhibited a large d 33 value of 554 pC/N and a small ε T 33 / ε o value of 1620, making it highly suitable for use in multilayer actuators and energy harvesters.