Results 21 to 30 of about 14,723 (260)

Novel lead-free BCZT-based ceramic with thermally-stable recovered energy density and increased energy storage efficiency

Journal of Materiomics, 2022
The eco-responsible lead-free piezoelectric ceramics have been intensively searched for more than a decade, however, the final goal to replace toxic ceramics like lead zirconate titanate (PZT) with lead-free compounds, having comparable or even better ...
Zouhair Hanani, Soukaina Merselmiz, M'barek Amjoud, Daoud Mezzane, Mohammed Lahcini, Jaafar Ghanbaja, Matjaž Spreitzer, Damjan Vengust, Mimoun El Marssi, Igor A. Luk'yanchuk, Zdravko Kutnjak, Brigita Rožič, Mohamed Gouné   +12 more
doaj   +1 more source

Impedance spectroscopy studies on lead free (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 ceramics [PDF]

Processing and Application of Ceramics, 2012
The AC complex impedance spectroscopy technique has been used to obtain the electrical parameters of polycrystalline sample of (Ba0.85Ca0.15)(Ti0.9Zr0.1)O3 in a wide frequency range at different temperatures.
Ahcène Chaouchi, Sadia Kennour
doaj  

Doping effect of SrZrO3 on KNLN ceramics structure and their dielectric properties [PDF]

Journal of Advanced Dielectrics, 2018
In this work, lead-free systems; (1−x) (K0.465Na0.465Li0.07) NbO3–xSrZrO3 (x=0, 0.005, 0.050, 0.095 and 0.14) were synthesized by the conventional solid-state reaction technique.
Emad Ewais, Ragab Mahani, Samy Mostafa, Adel Ahmed   +3 more
doaj   +1 more source

Enhanced Electrical Properties of Lead-Free Piezoelectric KNLN-BZ-BNT Ceramics With the Modification of Sm3+ Ions

Frontiers in Materials, 2021
Environment-friendly lead-free piezoelectric ceramics with great properties and high thermal stability are desired in the industry. In this work, the Sm3+-modified lead-free 0.915(K0.45Na0.5Li0.05)NbO3–0.075BaZrO3–0.01(Bi0.5Na0.5)TiO3 (KNLN-BZ-BNT ...
Yi Quan, Lingyan Wang, Wei Ren, Jinyan Zhao, Jian Zhuang, Kun Zheng, Zhe Wang, Tomoaki Karaki, Zhishui Jiang, Li Wen   +9 more
doaj   +1 more source

Improvement of electrical and energy harvesting properties of new lead-free BST modified 0.995BNKT–0.005LN ceramics

Journal of Asian Ceramic Societies, 2023
New lead-free (1-y)[0.995Bi0.5(Na0.80K0.20)0.5TiO3-0.005LiNbO3]-y[(Ba0.7Sr0.3)TiO3] or (1-y)[0.995BNKT-0.005LN]-y[BST] (where y = 0, 0.01, 0.02, 0.03, 0.04 and 0.05 mol fraction) ceramics were fabricated by a conventional sintering method with two ...
Pimpilai Wannasut, Panupong Jaiban, Pharatree Jaita, Methee Promsawat, Orawan Khamman, Anucha Watcharapasorn   +5 more
doaj   +1 more source

Technology and Electrophysical Properties of the (K0.44Na0.52Li0.04) NbO3 Ceramics Doped by Cr3+, Zn2+, Sb3+ or Fe3+ [PDF]

Archives of Metallurgy and Materials, 2018
In the work five ceramic compounds based on the (K0.44Na0.52Li0.04)NbO3 (KNLN) material modified with oxides: Cr2O3, ZnO, Sb2O3 or Fe2O3 (in an amount of 0.5 mol.%) were obtained.
D. Bochenek, K. Osińska, P. Niemiec, M. Adamczyk, T. Goryczka, R. Szych   +5 more
doaj   +1 more source

A Rotary-Linear Ultrasonic Motor Using MnO₂-Doped (Ba_0.97Ca_0.03)(Ti_0.96Sn_0.005Hf_0.035)O₃ Lead-Free Piezoelectric Ceramics with Improved Curie Temperature and Temperature Stability

Actuators, 2022
In this work, a cylindrical lead-free rotary-linear ultrasonic motor was attached to piezoelectric plates of MnO2-doped (Ba0.97Ca0.03)(Ti0.96Sn0.005Hf0.035)O3 ceramics using the first bending vibration to pull a thread output shaft of the interior of a ...
Cheng-Che Tsai, Sheng-Yuan Chu, Wei-Hsiang Chao, Cheng-Shong Hong   +3 more
doaj   +1 more source

Giant energy-storage density with ultrahigh efficiency in lead-free relaxors via high-entropy design

Nature Communications, 2022
Dielectric ceramics are widely used in advanced high/pulsed power capacitors. Here, the authors propose a high-entropy strategy to design “local polymorphic distortion” in lead-free ceramics, achieving high energy storage performance.
Liang Chen, Shiqing Deng, Hui Liu, Jie Wu, He Qi, Jun Chen   +5 more
doaj   +1 more source

Revisiting Stability Criteria in Ball‐Milled High‐Entropy Alloys: Do Hume–Rothery and Thermodynamic Rules Equally Apply?

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
The stability criteria affecting the formation of high‐entropy alloys, particularly focusing in supersaturated solid solutions produced by mechanical alloying, are analyzed. Criteria based on Hume–Rothery rules are distinguished from those derived from thermodynamic relations. The formers are generally applicable to mechanically alloyed samples.
Javier S. Blázquez, Alejandro F. Manchón‐Gordón, Antonio Vidal‐Crespo, Rafael Caballero‐Flores, Jhon J. Ipus, Clara F. Conde   +5 more
wiley   +1 more source

Fabrication and Characterization of Lead-Free BNT-6BT Ultrasonic Transducers Designed by an Intelligent Optimization Algorithm

Crystals, 2022
Lead-free piezoelectric material-based ultrasonic transducers have been researched for several years, but the inefficient properties and design difficulties have troubled lead-free ultrasonic transducers for a long time.
Junshan Zhang, Jianxin Zhao, Yi Quan, Jingrong He, Yi Li, Zhe Wang, Kun Zheng, Jian Zhuang, Zhishui Jiang, Li Wen, Wei Ren   +10 more
doaj   +1 more source