Multi-scale thermal stability of niobate-based lead-free piezoceramics with large piezoelectricity

Abstract

Multi-scale thermal stability of (K,Na)NbO3-based perovskites with a high d33 of 430 pC N−1 is investigated, revealing the origin of its large piezoelectricity.

Composition and temperature dependence of structure and piezoelectricity in (1−x)(K1−yNay)NbO3‐x(Bi1/2Na1/2)ZrO3 lead‐free ceramics

“…Recently, PZT‐like morphotropic phase boundary (MPBs) (R‐T) have been reported in KNN‐based ceramics by integrating compositions which were previously used to optimize the O‐T and R‐O phase boundaries . In 2011, Zuo et al.…”

Piezoelectric properties of (K0.5Na0.5)NbO3-BaTiO3lead-free ceramics prepared by spark plasma sintering

“…[2][3][4] Up to present, a lot of research papers on KNNbased lead-free piezoelectric ceramics have been published, including the piezoelectric properties, [5][6][7] the energy-storage properties, 8 etc. In order to further improve the piezoelectric properties of KNN, engineering of the polymorphic phase transition (PPT) between tetragonal and orthorhombic phases, i.e., shifting downward the PPT point T OÀT to ambient temperature through chemical modifications, 9 has been employed, represented by the formation of pseudobinary solid solutions between KNN and one additional component, e.g., KNN-LiTaO 3 , 10-14 KNN-LiSbO 3 15-17 KNN-BiFeO 3 18 and so on.…”

Ferroelectric Domain Structure and Local Piezoelectric Properties of Lead-Free (Ka0.5Na0.5)NbO3 and BiFeO3-Based Piezoelectric Ceramics

“…Domain structure transformation with temperature was also studied in 0.96(K 0.4 Na 0.6 )(Nb 0.96 Sb 0.04 )O 3 -0.04Bi 0.5 K 0.5 Zr 0.85 Sn 0.15 O 3 ceramics [123]. The process leads to the reorganization of domain structures between 28 °C and 50 °C, resulting in different temperature-dependent behaviors of regular and irregular domains [123].…”

“…The process leads to the reorganization of domain structures between 28 °C and 50 °C, resulting in different temperature-dependent behaviors of regular and irregular domains [123]. At high temperature (above 100 °C), the amplitude of piezoresponse significantly decreased, accompanied with obscured ferroelectric domain boundaries.…”