Effect of the structural properties on the energy density of Pb(Zr0.47Ti0.53)O3-Pb[(Ni0.6Zn0.4)1/3Nb2/3]O3 ceramics

• Published in: Journal of applied physics 2011-10, Vol.110 (8)
• Main Authors: Cha, Yu-Joung, Seo, In-Tae, Kang, In-Young, Shin, Sang-Bong, Choi, Jae-Hong, Nahm, Sahn, Seung, Tae-Hyun, Paik, Jong-Hoo
• Format: Article
• Language: English
• ISSN: 0021-8979; 1089-7550
• DOI: 10.1063/1.3653274

(1−x)Pb(Zr0.47Ti0.53)O3-xPb[(Ni0.6Zn0.4)1/3Nb2/3]O3 [(1−x)PZT-xP(NZ)N] ceramics with 0.22 ≤ x ≤ 0.45232 have the tetragonal-pseudocubic morphotropic phase boundary (MPB). Their ɛ33T/ɛ0 values considerably decreased but their d33 values slowly decreased on the pseudocubic side of the MPB. Therefore, high d33 × g33 values were obtained from a composition on the pseudocubic of the MPB because g33 is given as d33/ɛ33T. In particular, a very high d33 × g33 value of 20 134 × 10−15 m2/N was observed from the 0.7PZT–0.3P(NZ)N ceramic sintered at 1000 °C for 2 h, which had a pseudocubic structure. The 0.7PZT–0.3 P(NZ)N ceramic sintered at 950 °C also exhibited a similar d33 × g33 value of 20 179 × 10−15 m2/N but it considerably decreased to 12 474 × 10−15 m2/N for the 0.7PZT–0.3P(NZ)N ceramic sintered at 1100 °C for 2 h, which can be explained by the increased ɛ33T value that resulted from the increased grain size. The grain size of this ceramic decreased as the sintering time decreased, resulting in an increase of the d33 × g33 value due to the decreasing ɛ33T value. The high d33 × g33 value of 19 572 × 10−15 m2/N was also obtained from the 0.7PZT–0.3 P(NZ)N ceramic sintered at 1100 °C for 5.0 min, indicating that grain size is also important for obtaining a specimen with a high d33 × g33 value.