Utilization of Nonstoichiometric Nb5+ to Optimize Comprehensive Electrical Properties of KNN-Based Ceramics

Li H, Xie L, Tan Z, Xing J, Li X, Chen H, Wang F, Cheng Y, Tang M, Zhu J (2022)

Publication Type: Journal article, Original article

Publication year: 2022

Journal

Inorganic Chemistry American Chemical Society

URI: https://pubs.acs.org/doi/full/10.1021/acs.inorgchem.2c03160

DOI: 10.1021/acs.inorgchem.2c03160

Abstract

An easy approach is suggested to obtain excellent piezoelectric performances in potassium sodium niobate (KNN)-based ceramics simultaneously with low dielectric loss (tanδ), high Curie temperature (TC), and electromechanical coupling factor (kp). Herein, a KNN-based ceramics system with nonstoichiometric Nb5+ is designed. Excessive Nb5+ occupying the B-site significantly influences the microstructural features and electrical properties of KNN-based ceramics. Furthermore, the excessive Nb5+ improves the temperature stability of ceramics by providing the domain wall pegging effect and defect dipole. A high TC = 300 °C, large kp = 0.516, and d33 = 450 pC/N can be simultaneously obtained in the KNN-based ceramics with nonstoichiometric Nb5+. These results confirm that the comprehensive electrical properties of KNN-based ceramics can be tuned by optimizing the content of nonstoichiometric Nb5+.

Authors with CRIS profile

Lixu Xie Lehrstuhl für Glas und Keramik (WW3)

Involved external institutions

Sichuan University (SCU) / 四川大学 CN China (CN)

How to cite

APA:

Li, H., Xie, L., Tan, Z., Xing, J., Li, X., Chen, H.,... Zhu, J. (2022). Utilization of Nonstoichiometric Nb5+ to Optimize Comprehensive Electrical Properties of KNN-Based Ceramics. Inorganic Chemistry. https://doi.org/10.1021/acs.inorgchem.2c03160

MLA:

Li, Hongjiang, et al. "Utilization of Nonstoichiometric Nb5+ to Optimize Comprehensive Electrical Properties of KNN-Based Ceramics." Inorganic Chemistry (2022).

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