Phase evolution and associated high piezoelectric properties of sodium potassium niobate-based piezoelectric ceramics

Breakdown performance of potassium‐sodium niobate piezoceramics copped with oxides

“…To identify the phase structure of the KNN matrix and oxides, the Rietveld refinements of the ceramics are presented in Figures 1(B)‐1(E). It is revealed that the KNN matrix possesses an orthorhombic (O) phase while the lattice parameters change to some extent 20 . The appearance of the phase structure of the oxides further demonstrates the sole existence of CuO, Fe 2 O 3 , ZnO, and Al 2 O 3 .…”

Superior lead-free high-temperature piezoceramics of BiFeO3–BaTiO3–(Bi0.5Na0.5)TiO3 through cooperative regulation

“…3(a) and (b) compare the variation of d 33 and ε r against T c for the presently studied compositions with other MPB piezoelectric ceramic systems, respectively. 6–10,20–53 It is evident that the d 33 value of most MPB compositions can be further enhanced by adjusting the T c value downward relative to room temperature, which is generally associated with the substantial increase of ε r . 12,14,15 As a result, many previously reported piezoelectric material systems usually exhibit either high T c but extremely low d 33 , or relatively large d 33 but low T c .…”

Weakening Effect of Mn on the Oxygen Vacancies of KNN-BZT-Mn Ceramic with Improved Energy Storage Performance

“…It is observed that the Raman spectra of the samples possess the vibration of NbO 6 octahedron, which is assigned to 1A 1g (ν 1 )+1E g (ν 2 )+2F 1u (ν 3 ,ν 4 )+F 2g (ν 5 )+ F 2u (ν 6 ). 26,27 The Fig. 2b is peak fitting of ν 1 , ν 2 and ν 5 for the sample.…”