Results 251 to 260 of about 148,147 (298)

Hardening effect in lead-free piezoelectric ceramics

Journal of Materials Research, 2021
Ecologically sustainable development of piezoelectric ceramics has been the primary target of the community over the past 20 years. While the development of “soft” lead-free piezoelectric ceramics has been of high maturity, the understanding of “hard” lead-free piezoelectric ceramics is still far from satisfactory, leading to a limited chance for high ...
Trong Nghia Nguyen, Hao-Cheng Thong, Zhi-Xiang Zhu, Jing-Kai Nie, Yi-Xuan Liu, Ze Xu, Pak-Sheng Soon, Wen Gong, Ke Wang   +8 more
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Lead-free piezoelectric ceramics and thin films

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2010
Recent progress in lead-free piezoelectric ceramics and thin films with special emphasis on alkaline niobatebased and bismuth sodium titanate-based systems is reviewed concisely. Modifications of potassium sodium niobate (KNN) ceramics are presented and subsequent improvements in the electrical properties are summarized. Special attention is devoted to
Ahmad, Safari, Maryam, Abazari
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Perovskite Lead-Free Piezoelectric Ceramics

2011
Lead zirconate titanate (PZT)-based piezoelectric materials are the most widely used piezoelectric materials for electromechanical devices. However, due to the toxicity of lead, there is a strong interest in the development of environmental friendly lead-free piezoelectrics.
Hyeong Jae Lee, Shujun Zhang
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Selection of Lead‐Free Piezoelectric Ceramics

International Journal of Applied Ceramic Technology, 2013
Lead‐free piezoelectric ceramics are extensively investigated for the alternatives of lead‐based piezoceramics. ( K , N a) N b O 3 ...
Gaurav Vats, Rahul Vaish
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Na0.5K0.5NbO3–BiFeO3 lead-free piezoelectric ceramics

Journal of Physics and Chemistry of Solids, 2008
Abstract Lead-free (Na 0.5 K 0.5 )NbO 3 -based piezoelectric ceramics were successfully fabricated by substituting with a small amount of BiFeO 3 (BF). Difficulty in sintering of pure NKN ceramics can be eased by adding a few molar percent of BF, and the crystalline structure is also changed, leading to a morphotropic phase boundary (MPB) between ...
Ruzhong Zuo, Chun Ye, Xusheng Fang
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Lead-free ceramics for pyroelectric applications

Journal of Applied Physics, 2008
The use of lead-free materials has recently become a very important issue in environmental protection of the earth. Two groups of lead-free ceramics, (K0.5,Na0.5)NbO3 based (KNN) and Bi1−y(NaxK1−x)yTiO3 based (BNKT), were studied for their thermal, dielectric, and pyroelectric properties as candidates for pyroelectric sensor applications.
Lau, ST, Cheng, CH, Choy, SH, Lin, D, Kwok, KW, Chan, HLW   +5 more
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(Na0.5K0.5)NbO3–LiTaO3 lead-free piezoelectric ceramics

Materials Letters, 2005
Lead-free piezoelectric ceramics were prepared in the system (1−x)(Na0.5K0.5)NbO3–xLiTaO3 following the conventional mixed oxide route. The effect of cationic substitution of lithium for sodium and potassium in the A sites and tantalum for niobite in the B sites in (Na0.5K0.5)NbO3 (NKN) perovskite lattice on symmetry and physical properties were ...
Yiping Guo, Ken-ichi Kakimoto, Hitoshi Ohsato   +2 more
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Lead-Free Piezoelectric Ceramics

2010
A number of new lead-free electroceramics have been developed based on the known lead-free ferroelectric system Bi0.5Na0.5TiO3-Bi0.5K0.5TiO3 (BNT-20BKT) at the morphotropic phase boundary by introducing small amounts of K0.5Na0.5NbO3-Bi0.5K0.5TiO3 (KNN-03BKT).
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KNN–NTK composite lead-free piezoelectric ceramic

Journal of Applied Physics, 2014
A (K,Na)NbO3-based lead-free piezoelectric ceramic was successfully densified. It exhibited an enhanced electromechanical coupling factor of kp = 0.52, a piezoelectric constant d33 = 252 pC/N, and a frequency constant Np = 3170 Hz m because of the incorporation of an elaborate secondary phase composed primarily of KTiNbO5.
T. Matsuoka, H. Kozuka, K. Kitamura, H. Yamada, T. Kurahashi, M. Yamazaki, K. Ohbayashi   +6 more
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Microstructure design of lead-free piezoelectric ceramics

Journal of the European Ceramic Society, 2013
Abstract Computational and experimental methodologies are integrated into a novel combined technique to define microstructure design criteria and maximize the properties of rhombohedral Bi0.5Na0.4K0.1TiO3, from untextured (1 MRD ), d33 = 155 pC/N, to textured (4.41 MRD s), d33 = 227 pC/N.
Lee, Sukbin, Key, T. S., Liang, Z., Garcia, R. E., Wang, S., Tricoche, X., Rohrer, G. S., Saito, Y., Ito, C., Tani, T.   +9 more
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