Issue 29, 2025

Enhanced piezoelectric properties and electrical resistivity of Na+/Nd3+ co-doped Ca1−x(Na1/2Nd1/2)xBi4Ti4O15 ceramics for high-temperature applications

Abstract

In bismuth layered structure ferroelectrics (BLSFs), relatively low piezoelectric coefficients (d33) and DC electrical resistivity (ρdc) impede the high-temperature application of CaBi4Ti4O15 (CBT). In this work, Na+/Nd3+ co-doped Ca1−x(Na1/2Nd1/2)xBi4Ti4O15 (x = 0–0.12) ceramics were prepared using traditional solid-phase reaction method, and their microstructure and electrical properties were systematically investigated. The results show that with increasing Na+/Nd3+ co-doping content, the grain size first increases and then slightly decreases. The piezoelectric properties and DC electrical resistivity (ρdc) of the ceramic samples first increase and then slightly decrease. At x = 0.09, Ca0.91(Na1/2Nd1/2)0.09Bi4Ti4O15 exhibits a high piezoelectric coefficient (d33 = 24 pC N−1) and high temperature DC electrical resistivity (ρdc = 5.6 × 106 Ω cm at 600 °C), as well as a high Curie temperature of 761 °C. The enhancement in overall performance suggests that Na+/Nd3+ co-doped CBT ceramics are promising candidate materials for high-temperature piezoelectric applications.

Graphical abstract: Enhanced piezoelectric properties and electrical resistivity of Na+/Nd3+ co-doped Ca1−x(Na1/2Nd1/2)xBi4Ti4O15 ceramics for high-temperature applications

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Article information

Article type
Paper
Submitted
01 Meu 2025
Accepted
28 Me 2025
First published
03 Met 2025

J. Mater. Chem. C, 2025,13, 14832-14842

Enhanced piezoelectric properties and electrical resistivity of Na+/Nd3+ co-doped Ca1−x(Na1/2Nd1/2)xBi4Ti4O15 ceramics for high-temperature applications

M. Lu, X. Xu, Y. Fang, X. Xu, X. Feng, H. Xu, J. Xu and F. Gao, J. Mater. Chem. C, 2025, 13, 14832 DOI: 10.1039/D5TC00915D

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