Properties of (Bi, M)ZrO3 (M: alkali metals)-modified (K, Na)NbO3 lead-free piezoceramics. Issue 17 (1st December 2017)

• Record Type: Journal Article
• Authors: Kim, Byung-Hoon; Yang, Sun-A; Lee, Min-Ku; Lee, Gyoung-Ja
• Is Part Of: Ceramics international. Volume 43:Issue 17(2017)
• Page Start: 15880
• Page End: 15885
• Publication Date: 2017-12-01
• Subjects: Piezoelectric ceramics -- Lead-free -- Phase structure -- Accelerometer -- Thermal aging; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2017.08.161
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this work, the piezoelectric and thermal aging characteristics of 0.955(K, Na)NbO3 ceramics doped with 0.045(Bi, M)ZrO3 {M: Na, K, (Na, K), (Na, K, Li), (Na, Li), (K, Li), Li} were investigated. All the ceramics prepared by conventional solid-state process showed a rhombohedral−orthorhombic−tetragonal (R−O−T) or a R−T phase boundary, and the KNN-BNKLZ ceramic exhibited the highest d 33 value of ~300 pC/N ( T C ~337 °C). The effect of Li + on the piezoelectric and thermal aging properties of the KNN-BMZ ceramics was considerably larger than those of Na + and K + . The higher fraction of T phase relative to R phase with increasing Li + content is detrimental to the piezoelectric properties but beneficial to the thermal aging rate. The temperature-dependent behaviors of the charge sensitivity obtained from the prototype accelerometers were consistent with those of d 33 . The results indicate that the structural manipulation of the R−T phase boundary region is required to optimize the piezoelectric properties and thermal aging stability for accelerometer applications.