The positive effect of A-site nonstoichiometry on the electrical properties of Sr2Nb2O7 ceramics for high temperature piezoelectric sensor application

ANbO3 (A = Na, K) and (A′ = Ca, Sr) composite oxides for oxidative coupling of methane and oxidative dehydrogenation of ethane: perovskite vs. layered perovskite

“…Meanwhile, the NbO 6 octahedron in monoclinic layered A 2 ′ Nb 2 O 7 (A = Ca, Sr) perovskites only undergoes distortion or rotation in both reactions; however, its crystal phase does not change. 34,36 OCM reaction performance evaluation…”

The effect of Li/Ce co‐doping on structural and electrical properties of Sr2−x(Li, Ce)x/2Nb2O7 piezoelectric ceramics

“…Besides the process improvement, ions doping is also used to enhance the electrical properties of SNO‐based ceramics. Ions doping or introducing the second component to build solid solution can cause crystal structure distortion of SNO‐based ceramics, thereby improving electrical performance 15,16 . Especially, A‐site doping has a more significant improvement in piezoelectric performances 17 .…”

“…Xia et al. explored the structure and electrical properties of the A‐site nonstoichiometry Sr 2− x Nb 2 O 7− x piezoelectric ceramics prepared by the solid state reaction method 16 . Compared with stoichiometric SNO, the d 33 value of nonstoichiometry Sr 2− x Nb 2 O 7− x was increased from 1.0 to 2.1 pC/N due to the distortion and rotation of the oxygen octahedron, and the resistivity at 700°C was increased up to 1.1 × 10 7 Ω·cm.…”

“…Ions doping or introducing the second component to build solid solution can cause crystal structure distortion of SNO-based ceramics, thereby improving electrical performance. 15,16 Especially, A-site doping has a more significant improvement in piezoelectric performances. 17 Moreover, Gao et al prepared Sr 1.8 Ba 0.2 Nb 2 O 7 with the d 33 value of 3.6 pC/N by the SPS method, which is currently the highest d 33 value in SNO-based ceramics.…”

Materials Development and Potential Applications of Ceramics: New Opportunities and Challenges

“…Advanced ceramics serve as "bricks" for modern electronics, powering devices such smartphones, computers, wearable equipment, electrical vehicles, and telecommunications infrastructure. Piezoelectric ceramics find use in sensors [1,2], actuators [3,4], and ultrasound technology [5][6][7], while dielectric ceramics are crucial for capacitors [8,9] and resonators [10][11][12] in communication systems. Ceramics' ability to withstand extreme temperatures and harsh conditions makes them ideal for aerospace [13,14] and defense [15,16] applications.…”