Results 291 to 300 of about 321,908 (334)

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).
openaire   +1 more source

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
openaire   +1 more source

Novel Sodium Niobate-Based Lead-Free Ceramics as New Environment-Friendly Energy Storage Materials with High Energy Density, High Power Density, and Excellent Stability

ACS Sustainable Chemistry and Engineering, 2018
Recently, ceramic capacitors with fast charge–discharge performance and excellent energy storage characteristics have received considerable attention.
Mingxing Zhou, R. Liang, Zhiyong Zhou, Shiguang Yan, Xianlin Dong   +4 more
semanticscholar   +1 more source

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
openaire   +2 more sources

Electrical Aging in Lead-Free Piozoelectric Ceramics

2015
Bu çalışmada perovskit kristal yapılı kurşunsuz piezoelektrik Bi0.5(Na0.75K0.20Li0.05)0.5TiO3 (BNKLT), 0.948(K0.5Na0.5)NbO3-0.052LiSbO3(KNN-LS) ve %1 mol Cu katkılı KNN-LS-Cu (0.948(K0.5Na0.5)NbO30.052LiSbO3+%1 mol Cu) seramiklerin yüksek saflıktaki oksit ve karbonat bileşiminde tozlardan katı hal yöntemiyle üretimi gerçekleştirilmiştir.
KARGI, Birkız Dilek, TIKIZ, Serhat, ÖZGÜL, Metin   +2 more
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Boosting energy-storage performance in lead-free ceramics via polyphase engineering in the superparaelectric state

Composites Part B: Engineering, 2023
W. Cao, Pengfei Chen, Renju Lin, Feng Li, B. Ge, D. Song, Zhenxiang Cheng, Chunchang Wang   +7 more
semanticscholar   +1 more source

Lead-Free Ceramic Transducers for Sonar Applications

2018 IEEE International Ultrasonics Symposium (IUS), 2018
Lead-free piezoelectric ceramic development is gaining interest from researchers and transducer designers around the world due to future compliance requirement of the Restriction of Hazardous Substances (RoHS) Directive. This paper reports on Thales Australia developed soft lead-free material (Ba l-x Ca x )(Ti o.95 Zr 0.05 )O 3 (BCZT) with good ...
Valsala Kurusingal, Christopher Dean, George Gatsios   +2 more
openaire   +1 more source

Achieving outstanding temperature stability in KNN-based lead-free ceramics for energy storage behavior

Journal of the European Ceramic Society, 2023
Qifan Chen, Tingting Gao, Rong Lang, Zhi Tan, J. Xing, Jian Zhu   +5 more
semanticscholar   +1 more source

Enhancing electromechanical properties of lead-free ferroelectrics with bilayer ceramic/ceramic composites

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2015
The macroscopic electromechanical behavior of lead-free bilayer composites was characterized at room temperature. One layer consisted of a nonergodic relaxor, (Bi1/2Na1/2)TiO3-7BaTiO3, with an electric-field-induced longrange ferroelectric order, whereas the other is understood to be an ergodic relaxor [(Bi1/2Na1/2)TiO3-25SrTiO3] that undergoes a ...
Azatuhi, Ayrikyan, Virginia, Rojas, Leopoldo, Molina-Luna, Matias, Acosta, Jurij, Koruza, Kyle G, Webber   +5 more
openaire   +2 more sources

Regulating ferroelectric polarization and dielectric properties of BT-based lead-free ceramics

Journal of Alloys and Compounds, 2023
Jing Shi, Rizhuang Dong, Jiayi He, Daowei Wu, W. Tian, Xiao Liu   +5 more
semanticscholar   +1 more source