Results 1 to 10 of about 126,247 (197)

Lead-Free Sodium Potassium Niobate-Based Multilayer Structures for Ultrasound Transducer Applications [PDF]

Sensors, 2022
Thick films with nominal composition (K0.5Na0.5)0.99Sr0.005NbO3 (KNNSr) on porous ceramics with identical nominal composition were investigated as potential candidates for environmentally benign ultrasonic transducers composed entirely of inorganic ...
Danjela Kuscer, Brigita Kmet, Silvo Drnovšek, Julien Bustillo, Franck Levassort   +4 more
doaj   +3 more sources

Lead-Free Potassium Sodium Niobate-Based Wearable Ultrasonic Patches for Blood Pressure Detection [PDF]

Micromachines
Ultrasound is one of the most promising methods for blood pressure monitoring due to its harmless, non-invasive, and high-precision characteristics. To further enhance the biocompatibility of ultrasound blood pressure monitors, this work reports wearable
Yajun Sun, Yi Quan, Jie Xing, Zhi Tan, Xinhao Sun, Lifei Lou, Chunlong Fei, Jianguo Zhu, Yintang Yang   +8 more
doaj   +3 more sources

Contribution of irreversible non-180° domain to performance for multiphase coexisted potassium sodium niobate ceramics [PDF]

Nature Communications
Despite the dominance of lead-based piezoelectric materials with ultrahigh electric-field-induced strain in actuating applications, seeking eco-friendly substitutes with an equivalent performance remains an urgent demand.
Bo Wu, Lin Zhao, Jiaqing Feng, Yiting Zhang, Xilong Song, Jian Ma, Hong Tao, Ze Xu, Yi-Xuan Liu, Shidong Wang, Jingtong Lu, Fangyuan Zhu, Bing Han, Ke Wang   +13 more
doaj   +3 more sources

Humidity resistance and recovery of sintered sodium potassium niobate-based piezoelectrics

Open Ceramics, 2023
This study delves into the crucial impact of humidity on the microstructure, phase composition, dielectric, ferroelectric, and piezoelectric properties of sintered 0.06LiNbO3–0.94(K0.5Na0.5)NbO3 lead-free piezoelectric ceramics during storage.
Gianni Ferrero, Malgorzata K. Pierchala, Konstantin Astafiev, Erling Ringgaard, Bhaskar Reddy Sudireddy, Astri Bjørnetun Haugen   +5 more
doaj   +2 more sources

Giant electrostrain coefficient under low driving electric field in sodium potassium niobate piezoelectric ceramics with symmetrical bipolar strain. [PDF]

Nat Commun
Currently, achieving highly symmetrical bipolar strain and high electrostrain under low driving electric field remains challenging in piezoelectric materials.
Cao F, Cen Z, Xu Z, Zhang X, Shi X, Huang H, Liu Z, Liu YX, Cai X, Zhu D, Wang K, Dou Z, Wu C, Luo N.   +13 more
europepmc   +2 more sources

Processing and characterization of lead-free ceramics on the base of sodium–potassium niobate [PDF]

Journal of Advanced Dielectrics, 2018
Lead-free sodium–potassium niobate-based piezoelectric materials are most intensively studied in order to replace the widely used Pb-based ones. In this work, the effects of modification of compositions by donor and acceptor dopants in the A- and B-sites
E. D. Politova, N. V. Golubko, G. M. Kaleva, A. V. Mosunov, N. V. Sadovskaya, S. Yu. Stefanovich, D. A. Kiselev, A. M. Kislyuk, P. K. Panda   +8 more
doaj   +2 more sources

BiFeO3-BaTiO3: A new generation of lead-free electroceramics [PDF]

Journal of Advanced Dielectrics, 2018
Lead-based electroceramics such as Pb(Zr.Ti)O3 (PZT) and its derivatives have excellent piezoelectric, pyroelectric and energy storage properties and can be used in a wide range of applications.
Dawei Wang, Ge Wang, Shunsuke Murakami, Zhongming Fan, Antonio Feteira, Di Zhou, Shikuan Sun, Quanliang Zhao, Ian M. Reaney   +8 more
doaj   +5 more sources

High sound pressure piezoelectric micromachined ultrasonic transducers using sputtered potassium sodium niobate [PDF]

Microsystems & Nanoengineering
This work presents air-coupled piezoelectric micromachined ultrasonic transducers (pMUTs) with high sound pressure level (SPL) under low-driving voltages by utilizing sputtered potassium sodium niobate K0.34Na0.66NbO3 (KNN) films.
Fan Xia, Yande Peng, Wei Yue, Mingze Luo, Megan Teng, Chun-Ming Chen, Sedat Pala, Xiaoyang Yu, Yuanzheng Ma, Megha Acharya, Ryuichi Arakawa, Lane W. Martin, Liwei Lin   +12 more
doaj   +2 more sources

Composition Regulation of Potassium Sodium Niobate Thin Films through Post-Annealing under Alkali Element Atmospheres [PDF]

Nanomaterials
Amorphous potassium sodium niobate (KNN) films were synthesized at 300 °C through the radio frequency magnetron sputtering method and subsequently crystallized by post-annealing at 700 °C in various alkali element atmospheres (Na and K). The as-deposited
Binjie Chen, Chuanyang Tao, Wenying Fan, Binglin Shen, Min Ju, Zhongshang Dou, Chaofeng Wu, Fang-Zhou Yao, Wen Gong, Ke Wang   +9 more
doaj   +2 more sources

Effects of potassium sodium niobate (KNN) thickness on biaxial non-resonant microelectromechanical systems (MEMS) mirror performance [PDF]

Journal of Sensors and Sensor Systems
This work presents the results obtained with potassium sodium niobate (KNN) biaxial non-resonant microelectromechanical systems (MEMS) mirrors manufactured on a 200 mm silicon substrate.
L. Mollard, C. Dieppedale, A. Hamelin, R. Liechti, G. Le Rhun   +4 more
doaj   +2 more sources