Enhanced piezoelectric properties and temperature-insensitive strain behavior of <001>-textured KNN-based ceramics. Issue 11 (1st August 2017)

• Record Type: Journal Article
• Authors: Liu, Baihui; Li, Peng; Shen, Bo; Zhai, Jiwei; Zhang, Yang; Li, Feng; Liu, Xing
• Is Part Of: Ceramics international. Volume 43:Issue 11(2017)
• Page Start: 8004
• Page End: 8009
• Publication Date: 2017-08-01
• Subjects: KNN-based textured ceramics -- Microstructure -- Piezoelectric properties -- Temperature stability; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.03.090
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this study, <001>-textured 0.99(K0.5 Na0.5 )0.95 Li0.05 Nb0.93 Sb0.07 O3 −0.01CaZrO3 [abbreviated as 0.99KNLNS-0.01CZ] lead-free ceramics were prepared by templated grain growth (TGG) using plate-like NaNbO3 templates and sintered by a two-step sintering process with different soaking time. All textured samples with high Lotgering factor ( f >85%) presented orthorhombic and tetragonal coexisting phase, and the proportion of orthorhombic phase was varied with prolonged soaking time. A large piezoelectric constant d 33 (~ 310 pC/N) was obtained in the textured samples with a 12 h soaking time, which was almost twice larger compared to the randomly oriented one. Furthermore, the field-induced piezoelectric strain coefficient d 33 * (~ 440 pm/V) of the texture d ceramics with 6 h soaking time was larger than the value of randomly oriented one (~ 298 pm/V) at room-temperature. Enhanced piezoelectric response and good temperature stability prove that <001>-textured 0.99KNLNS-0.01CZ ceramics are promising candidates in the field of lead-free piezoelectric materials.