Results 111 to 120 of about 25,661 (302)
Journal of Saudi Chemical SocietyThe compound [(Bi0.5Na0.5)0.94Ba0.06]1-xLixTiO3 (BNBT-Li) 0 ≤ x ≤ 0.04), was prepared using a solid-state reaction method. In the X-ray diffraction (XRD) study, a tetragonal structure was observed for the compositions x = 0 and steadily modified to a ...
Sapna Qazi +10 more
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Studies on structural, dielectric and optical properties of (Ba0.95Ca0.05)1-x (Ti0.8Sn0.2)1-x Na x Nb x O3 lead-free ceramics. [PDF]
RSC Adv, 2021 Slimi H, Oueslati A, Aydi A.
europepmc +1 more source
Advanced Engineering Materials, EarlyView.Identified through the use of statistical design of experiments and metallographic investigation, this study exposes the stochastic origins of intergranular cracks in blown powder laser beam directed energy deposition additive manufacturing of pure molybdenum. It further demonstrates a successful crack mitigation approach with direct correlation to the
Nathaniel J. Lies +2 more
wiley +1 more source
Progress in engineering high strain lead-free piezoelectric ceramics
Science and Technology of Advanced Materials, 2010 Environmental concerns are strongly driving the need to replace the lead-based piezoelectric materials currently employed as multilayer actuators. The current review describes both compositional and structural engineering approaches to achieve enhanced ...
Serhiy O Leontsev and Richard E Eitel
doaj
EcoMatOver the years, lead‐based piezoelectric ceramics found extensive use in vital fields such as sensors and actuators. Despite their exceptional electromechanical properties, lead‐containing materials pose severe environmental risks and foster a new era of
Yanqi Wu +7 more
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Observation of large electrocaloric properties in lead-free Ba0.98Ca0.02Ti0.98Sn0.02O3 ceramics
AIP Advances, 2019 Tetragonal lead-free Ba0.98Ca0.02Ti0.98Sn0.02O3 (BCST) compound sintered at 1400 °C was investigated for its electrocaloric properties. The large adiabatic temperature variation, ΔT ∼ 0.476 K and isothermal entropy change, ΔS ∼ 1.90 J/kg.K were obtained ...
Ramovatar +5 more
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Processing and Properties of Lead-Free KNN-Based Ceramics
In the present work characterization of lead free ceramics based on KNN has been studied. Ceramics with the chemical composition (1-x)(K0.5Na0.5)Nb1-ySbyO3-xBaTiO3 (x=0.02, 0.04; y=0.04, 0.07) were prepared by conventional ceramic processing technology.
Livinsh, Maris +3 more
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Robust Spot Melting by 3D Spot Arrangements in Electron Beam Powder Bed Fusion
Advanced Engineering Materials, EarlyView.This work proposes an approach to replace separately melted contours for spot melting in electron beam powder fusion. Adapting the spot arrangements close to the contour combined with stacking yields a comparable surface quality without the inherent challenges of separate contours, as demonstrated, by electron optical images and roughness measurements.
Tobias Kupfer +4 more
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Gongneng cailiao yu qijian xuebaoUtilizing solid-phase sintering technology, lead-free piezoelectric ceramics (K0.44Na0.52Li0.04)(Nb0.9Ta0.06Sb0.04)O3 with high density and superior electrical properties were successfully fabricated at temperatures ranging from 1055 to 1070 ℃.
Lin WANG +3 more
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Lead-free ferroelectric ceramics for multilayer ceramic capacitors
Céramiques ferroélectriques sans plomb pour condensateurs céramiques multicouches De nos jours, la consommation des condensateurs céramiques multicouches (MLCCs) augmente en raison de leur efficacité et leur fiabilité. La miniaturisation résultant dans une plus grande dissipation volumique de chaleur et les nouvelles applications ...
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