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Sodium potassium niobate-based lead-free piezoelectric ceramics
2021Due to the toxicity of lead, there is an urgent need to develop lead-free alternatives to replace the currently dominant lead-based piezoelectrics such as lead zirconate titanate (PZT). (Na_[0.5]K_[0.5])NbO₃ (NKN)-based piezoelectrics are promising because of their relatively high Curie temperatures and piezoelectric coefficients among the non-lead ...
Huidong Li, Wei-Heng Shih, Wan Y. Shih
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High-Performance Lead-Free Barium Titanate Piezoelectric Ceramics
Advances in Science and Technology, 2008Barium titanate (BaTiO3) ceramics with a high-density were fabricated by two-step sintering method from hydrothermally synthesized 100 nm BaTiO3 nano-particles. The best specimen with an average grain size of 1.6 μm and a density of 5.91 g/cm3 (98.3% of the theoretical value).
Tomoaki Karaki +2 more
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Lead-free piezoelectric ceramics based on perovskite structures
Journal of Electroceramics, 2007The piezoelectric properties of a solid solution based on three components of bismuth sodium titanate (Bi1/2Na1/2)TiO3 (BNT), bismuth potassium titanate, (Bi1/2K1/2)TiO3 (BKT), and barium titanate, BaTiO3 (BT), that is x(Bi1/2Na1/2)TiO3−y(Bi1/2K1/2)TiO3−zBaTiO3, [ $$ x + y + z ...
T. Takenaka +4 more
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Hydrothermal (K1-xNax)NbO3 Lead-free Piezoelectric Ceramics
Journal of the Korean Physical Society, 2010As a lead-free piezoelectric ceramics, (K,Na)NbO$_{3}$ is a promising material because of its good piezoelectric properties. In this study, (K$_{1-x}$Na$_{x}$)NbO$_{3}$ ceramics were synthesized from a KNbO$_{3}$ and NaNbO$_{3}$ mixture powder prepared by the hydrothermal reaction. The hydrothermal reaction enables the production of high quality powder
Takafumi Maeda +4 more
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Gd2O3 doped 0.82Bi0.5Na0.5TiO3–0.18Bi0.5K0.5TiO3 lead-free piezoelectric ceramics
Materials & Design, 2012Abstract Gd2O3 (0–0.8 wt.%)-doped 0.82Bi0.5Na0.5TiO3–0.18Bi0.5K0.5TiO3 (BNKT18) lead-free piezoelectric ceramics were synthesized by a conventional solid-state process. The effects of Gd2O3 on the microstructure, the dielectric, ferroelectric and piezoelectric properties were investigated. X-ray diffraction (XRD) data shows that Gd2O3 in an amount of
Peng Fu +5 more
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Bismuth Ferrite-Based Lead-Free High-Entropy Piezoelectric Ceramics
ACS Applied Materials & InterfacesPiezoelectric ceramics, as essential components of actuators and transducers, have captured significant attention in both industrial and scientific research. The "entropy engineering" approach has been demonstrated to achieve excellent performance in lead-based materials.
Hongtian Li +9 more
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Lead-Free Piezoelectric Ceramic Coatings Fabricated by Thermal Spray Process
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2017This paper starts from a review on the progress in fabrication of piezoelectric ceramic coatings by thermal spray method. For our experimental work, two types of lead-free piezoelectric ceramic coatings, including potassium-sodium niobate-based and bismuth sodium titanate-based, are fabricated by thermal spray process, and their structure, morphology ...
Kui Yao +5 more
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Piezoelectric properties of some lead-free ferroelectric ceramics
Ferroelectrics, 1999Abstract The use of lead-free materials in piezoelectric ceramics has recently become a very important issue in environmental protection of the earth. Some lead-free piezoelectric materials, namely bismuth sodium titanate, (Bi1/2Na1/2)TiO3 (BNT) – based solid solution ceramics, such as (1-a)BNT-a·BaTiO3 [BNBT], (1-b)BNT-b·NaNbO3 [BNTN] and a(Bi1/2Na1/2)
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