Enhancing the electrical properties of high-Curie temperature BNT–PZT piezoceramics by oxides-hydrothermal method
Source abstract
Abstract
The difference between the oxides-hydrothermal (O-HT) method and the traditional hydrothermal method is that the former uses insoluble or poorly soluble metal oxides as raw materials. The O-HT method is mainly used to study the luminescence properties of rare-earth nanomaterials. In this work, the O-HT method has been used for the synthesis of high-Curie temperature (high-TC) 0.3Bi(Ni1/2Ti1/2)O3–0.7Pb(Zr0.52Ti0.48)O3 (0.3BNT–0.7PZT) piezoelectric ceramic powders at different hydrothermal synthesis temperatures. After the O-HT synthesis, ceramic powders are calcined and sintered. The effects of different hydrothermal synthesis temperatures on the crystallinity, structure, morphology, and electrical performance of the products are investigated. At a low hydrothermal synthesis temperature of 200 °C for 12 h, well-crystallized ceramic powders are obtained. After sintering, the ceramic samples exhibit a dense microstructure and optimal electrical properties (εr = 6840, d33 = 501 pC/N, TC = 245 °C, Pr = 14.79 μC/cm2, and Ec = 16.86 kV/cm). The experimental results show that applying O-HT technology can dramatically induce grain growth during sintering and improve the piezoelectricity and Curie temperature of samples and that it has the advantages of energy saving, environmental recycling, and suitability for industrial mass production.
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Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis · Acoustic Wave Resonator Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Materials and Metallurgy, Guizhou University 1 , Guiyang 550025, China
Guiyang High-Tech YiGe Electronic Co., Ltd. 2 , Guiyang 550000, China
Funding
National Natural Science Foundation of China · Guizhou Education Department Youth Science and Technology Talents Growth Project
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