What question did this study set out to answer?

The study aims to enhance the piezoelectric properties and resistivity of high-temperature ceramics through co-doping with W and Cr.

March 14, 2026Journal of Advanced Ceramics1 citationsOpen Access

Synergistically enhances piezoelectricity and resistivity of high temperature 0.3Na 0.5 Bi 2.5 Nb 2 O 9 0.7Bi 3 TiNbO 9 ceramics by (W,Cr) co-doping

ZZZhipeng Zhang FSFusheng Song QWQilai WenJingdezhen Ceramic Institute

Key Points

The study aims to enhance the piezoelectric properties and resistivity of high-temperature ceramics through co-doping with W and Cr.
Preparation of 0.3NBN-0.7BTN-WC ceramics via solid-state reaction method.
Incorporation of W and Cr ions in varying concentrations for doping.
Measurement of piezoelectric constants and resistivity under high-temperature conditions.
Achieved a piezoelectric constant of 20.3 pC/N and a Curie temperature of 845.9 °C.
Secured high resistivity at 7.3×10^7 Ω·cm with low dielectric loss of 0.057 at 500 °C.
Maintained 93.1% of initial piezoelectric value after 600 °C annealing.

Abstract

3Na0.5Bi2.5Nb2O9-0.7Bi3Ti1-x(W1/3Cr2/3)xNbO9 (0.3NBN-0.7BTN-WCx, x=0-0.06) high Curie temperature piezoceramics with bismuth layered structure were prepared by a solid-state reaction method. The optimized 0.3NBN-0.7BTN-WC0.04 ceramics possess an enhanced piezoelectric constant (d33=20.3 pC/N) with a very high Curie temperature (TC=845.9 oC). The incorporation of W/Cr ions disrupts the long-range order of the crystal lattice, which induces significant distortion of Nb/TiO6 octahedral and generates more stable domain structures, contributing to enhanced piezoelectric response and high Curie temperature. Meanwhile, W6+ donor doping and the formation of defect dipoles synergistically reduced the concentration of oxygen vacancies, thereby achieving both high resistivity (ρ=7.3×107 Ω·cm) and low dielectric loss (tanδ=0.057) under high temperature condition (@500 oC). In addition, the d33 of 0.3NBN-0.7BTN-WC0.04 ceramics exhibits excellent thermal stability, retaining 93.1% of its initial value (d33=18.9 pC/N) after annealing at 600 oC. All results indicate that 0.3NBN-0.7BTN-WC0.04 ceramics can be a good candidate for piezoelectric sensor application in high temperature harsh environments.

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