Results 141 to 150 of about 17,613 (186)

Textured Lead-Free Piezoelectric Ceramics for Flexible Energy Harvesters

ACS Applied Materials & Interfaces, 2023
A lead-free (K,Na)NbO3-based piezoelectric ceramic is textured along the (001) direction using the NaNbO3 (NN) seeds. The composition 0.96(K0.5Na0.5)(Nb0.965Sb0.035)O3-0.01CaZrO3-0.03(Bi0.5K0.5)HfO3 (KNN) is found to provide an excellent combination of electromechanical coefficients at room temperature. The textured composition with 5 wt % NN template (
Yuvasree Purusothaman, Haoyang Leng, Aman Nanda, Ilan Levine, Shashank Priya   +4 more
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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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(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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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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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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Giant Piezoelectricity in Potassium–Sodium Niobate Lead-Free Ceramics

Journal of the American Chemical Society, 2014
Environment protection and human health concern is the driving force to eliminate the lead from commercial piezoelectric materials. In 2004, Saito et al. [ Saito et al., Nature , 2004 , 432 , 84 . ] developed an alkali niobate-based perovskite solid solution with a peak piezoelectric constant d33 of 416 pC/N when prepared in the textured ...
Xiaopeng, Wang, Jiagang, Wu, Dingquan, Xiao, Jianguo, Zhu, Xiaojing, Cheng, Ting, Zheng, Binyu, Zhang, Xiaojie, Lou, Xiangjian, Wang   +8 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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High Power Characteristics of Lead‐Free Piezoelectric Ceramics

Journal of the American Ceramic Society, 2012
High power characteristics of lead‐free ( Bi , Na ) Ti O 3
Lee, Hyeong Jae, Ural, Seyit, Chen, Lei, Uchino, Kenji, Zhang, Shujun   +4 more
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