Results 61 to 70 of about 25,661 (302)

Dielectric properties of Na0.25K0.25Bi0.5TiO3 lead-free ceramics

Acta Physica Sinica, 2006
Na0.25K0.25Bi0.5TiO3(NKBT50)lead-free ceramics were prepared by solid-state reaction. The dielectric property of the ceramics was investigated in the lemperature range from room temperature to 400℃. Our results show that there exists a dielectric anomaly in the vicinity of 70℃ for the unpoled ceramics sintered in air, which will disappear after the ...
null Zhao Su-Chuan, null Li Guo-Rong, null Zhang Li-Na, null Wang Tian-Bao, null Ding Ai-Li   +4 more
openaire   +1 more source

Energy storage properties in Nd doped AgNbTaO3 lead-free antiferroelectric ceramics with Nb-site vacancies

, 2023
It is crucial to discover lead-free materials with ultrahigh recoverable energy density (Wrec) that can be employed in future pulse power capacitors. In this work, a high Wrec of 4.51 J/cm3 was successfully obtained in lead-free Nd-doped AgNb0.8Ta0.2O3 ...
Wang, Dawei, Islam Shyha, Wang, Ge, Shyha, Islam, Lu, Zhilun, Dawei Wang, Jianwei Zhao, Zhao, Jianwei, Zhilun Lu, Zhang, Bin, Dongyang Sun, Ge Wang, Bin Zhang, Sun, Dongyang   +13 more
core   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Structure and electrical properties of (Bi,Na)0.94Ba0.06Ti1-x(Mg1/3Nb2/3)xO3 ceramics [PDF]

Processing and Application of Ceramics, 2018
In this work the effect of pseudo-cation (Mg2+1/3Nb5+2/3)4+ addition on Ti-site of (Bi0.5Na0.5)0.94Ba0.06TiO3 ceramics, having general formula (Bi,Na)0.94Ba0.06Ti1-x(Mg1/3Nb2/3)xO3 (0 ≤ x ≤ 1), on their structural and electrical properties was ...
Ashutosh Prasad, Ranjan Kumar Mishra, Kumar Prabhat Chandra, Kamal Prasad   +3 more
doaj   +1 more source

Transferring lead-free piezoelectric ceramics into application

Journal of the European Ceramic Society, 2015
After twenty years of partly quiet and ten years of partly enthusiastic research into lead-free piezoceramics there are now clear prospects for transfer into applications in some areas. This mimics prior research into eliminating lead from other technologies that resulted in restricted lead use in batteries and dwindling use in other applications.
Jürgen Rödel, Kyle G. Webber, Robert Dittmer, Wook Jo, Masahiko Kimura, Dragan Damjanovic   +5 more
openaire   +2 more sources

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Composition‐Tuned Enhancement of the Anomalous Nernst Effect in FeCo–Pt Thin Films on Rigid and Flexible Substrates

Advanced Engineering Materials, EarlyView.
Disordered (Fe50Co50)1−xPtx thin films exhibit a pronounced anomalous Nernst effect (ANE) with a strong composition dependence on both rigid and flexible substrates. The transverse thermoelectric response peaks near 22.5 at.% Pt, accompanied by enhanced αxy/σxy scaling, thermal transport, and ANE sensitivity.
Mojtaba Mohammadi, Hiroyuki Awano, Kenji Tanabe   +2 more
wiley   +1 more source

Dielectric Characteristics of the Lead-free Piezoelectric Ceramics

, 2012
[[abstract]]In order to improve the sintering density and dielectric properties of the lead-free K0.5Na0.5NbO3-based ceramics, by the use of solid-state reaction, part of the Nb atoms are substituted by the Ta atoms to form K0.5Na0.5Nb0.95Ta0.05O3 ...
Tzou, Wen-Cheng, Cheng, Chien-Min, Kuan, Ming-Chang, Yang, Hung-Chi, Yang, Cheng-Fu, Jong, Fuh-Cheng, Chen, Kai-Huang   +6 more
core  

Combined Process‐ and Phase‐Field‐Simulation to Predict the Microstructure of Single‐Crystal Ni‐Based Superalloys

Advanced Engineering Materials, EarlyView.
A combined finite element and phase‐field approach predicts the evolution of microstructure during the directional solidification of Ni‐based superalloys. The model reveals how withdrawal rate, temperature gradient, and wall thickness control the dendrite spacing, highlighting the strong effect of surface regions in thin sections where dendrite growth ...
Sean Böhm, André B. Baldissera, Rainer Völkl, Uwe Glatzel   +3 more
wiley   +1 more source

Concurrently enhanced piezoelectric performance and curie temperature in stressed lead-free Ba0.85Ca0.15Ti0.9Zr0.1O3 ceramics

Nature Communications
Eco-friendly, lead-free BaTiO3-based piezoelectrics are critical for sustainable electronics, but improving their piezoelectric properties often compromises Curie temperature (T C).
Yuanhui Su, Qingying Wang, Yu Huan, Jianli Wang, Wei Sun, Yongjun Li, Tao Wei, Zhenxiang Cheng   +7 more
doaj   +1 more source