Comprehensive analysis of the temperature dependence of the crystal structure of (1−x)K_0.5Na_0.5NbO₃–xBa(Li_1/4Nb_3/4)O₃piezoelectric ceramics

Abstract

Much attention has been paid for the characterization of piezoelectric properties and crystal structure of K0.5Na0.5NbO3 (KNN)-based ceramics with Li substitution for A-site to date. In contrast, this study described...

Enhanced photocatalytic hydrogen production performance of K0.5Na0.5NbO3-based ferroelectric semiconductor ceramics by Nd/Ni modification at A/B sites and polarization

“…2e, the v 1 mode moves to a lower angle with increasing doping, meaning that the crystal structure undergoes a structural evolution from orthorhombic to tetragonal phase, consistent with the XRD analysis. 23,24 Also, the intensity of the Raman spectra decreases with the continuous introduction of foreign elements, which implies the change of symmetry of the crystal structure and the enhancement of relaxation. 24,25 The SEM of the (1 À x)KNN-xNN ceramics is shown in Fig.…”

Excellent comprehensive electrical properties in KNN-based ceramics via synergistic effects of structural flexibility and domain engineering

“…[1][2][3][4][5][6][7] Potassium sodium niobate ceramics (KNN)-based materials are an important family of lead-free functional materials and are promising candidates to replace the commercial lead-based piezoelectric devices. [8][9][10] To achieve high-performance KNN-based ceramics that can compete with lead-based ones, researchers have focused on improving their piezoelectric properties by constructing a polymorphic phase boundary (PPB) near room temperature. Some studies have reported high d 33 values of 650 AE 20 pC N À1 11 and 680 AE 10 pC N À1 12 using this approach.…”

A spin–orbit configuration interaction study of the low-lying electronic states of the diatomic lithium antimonide cation

“…Lithium-ion batteries have been widely used in energy storage devices, which are currently one of the most promising technologies [20][21][22][23][24][25][26][27][28][29][30]. Lithium has also been utilized in special glasses and ceramics [31][32][33][34][35], as well as in wearable sensors [36][37][38] and pharmacology [39][40][41]. Our current knowledge of lithium and its compounds can be found in reviews [42][43][44][45][46][47][48][49][50][51] and the references therein.…”