Results 61 to 70 of about 225,954 (203)

Inhibiting oxygen vacancies and twisting NbO6 octahedron in erbium modified KNN-based multifunctional ceramics

Journal of Materiomics
It is a challenge to obtain highly tunable multifunctional performances in one ferroelectric system by a simple approach to meet the miniaturization, integration, and functionalization requirements of advanced electronic components.
Lulu Gao, Zhiyong Liu, Pengrong Ren, Renhong Liang, Ting Li, Kun Guo, Bing Xie, Jinshan Lu, Pu Mao, Jun Tian, Longlong Shu   +10 more
doaj   +1 more source

Mechanical confinement for improved energy storage density in BNT-BT-KNN lead-free ceramic capacitors

AIP Advances, 2014
With the advent of modern power electronics, embedded circuits and non-conventional energy harvesting, the need for high performance capacitors is bound to become indispensible.
Aditya Chauhan, Satyanarayan Patel, Rahul Vaish   +2 more
doaj   +1 more source

Revealing the Giant Electromechanical Effects in Yttria‐Stabilized Zirconia Single Crystal

Advanced Science, EarlyView.
Giant electromechanical responses are uncovered in yttria‐stabilized zirconia single crystal (SC‐YSZ), exhibiting pronounced orientation dependence. The giant electrostriction and piezoelectricity are directly correlated with the long‐range transport kinetics of oxygen vacancies.
Zhuwu Yi, Kai Pan, Chaoming Hu, Luocheng Liao, Zhijian He, Ziwei Guo, Yibao Wu, Changxing Zhao, Shuhong Xie   +8 more
wiley   +1 more source

Electrically reversible cracks in an intermetallic film controlled by an electric field

Nature Communications, 2018
Electric-field-induced cracks are generally detrimental to functionality of ferroelectric ceramics. Liu et al. use an intermetallic alloy and ferroelectric oxide junction to mediate the reversible formation of cracks at nanoscales, resulting in colossal ...
Z. Q. Liu, J. H. Liu, M. D. Biegalski, J.-M. Hu, S. L. Shang, Y. Ji, J. M. Wang, S. L. Hsu, A. T. Wong, M. J. Cordill, B. Gludovatz, C. Marker, H. Yan, Z. X. Feng, L. You, M. W. Lin, T. Z. Ward, Z. K. Liu, C. B. Jiang, L. Q. Chen, R. O. Ritchie, H. M. Christen, R. Ramesh   +22 more
doaj   +1 more source

Unraveling Hierarchical B‐Site Ordering: Mechanism of Microwave Dielectric Enhancement in Complex Perovskite Oxide Ceramics

Advanced Science, EarlyView.
This study maps out the hierarchical ordering in 1:2 B‐site complex perovskite ceramics using a comprehensive multiscale characterization route. It turns out that intradomain strain, oxygen vacancies, and Mg disorder within the ordered domains act as strong phonon scatterers.
Qingqiao Fu, Hui Gu, Hanbin Gao, Pianpian Ma, Xiangming Chen, Juanjuan Xing, Qiang Zheng   +6 more
wiley   +1 more source

Flexoelectric Suppression of Interfacial Carrier Loss in BaTiO3 Thin‐Film Bulk Photovoltaic Systems

Advanced Science, EarlyView.
In single‐crystalline BaTiO3 thin films, flexoelectric strain gradients strongly enhance photocurrent by suppressing interfacial carrier loss. Loading experiments reveal a ∼35‐fold photocurrent increase with applied force. Self‐consistent electrostatic modeling shows that strain gradients reshape the interfacial potential landscape, strengthen local ...
Minwoo Jang, Hyunkyu Lim, Sanghoon Yeom, Jaewhan Oh, Yongsoo Yang, Hyungwoo Lee   +5 more
wiley   +1 more source

Detection of Degraded Formulated BaTiO3 Induced by Oxygen Vacancy Migration Using Ultrasonic Attenuation

Advanced Science, EarlyView.
Oxygen vacancy migration is a key degradation mechanism for the majority of MLCCs. There are limitations with spatially identifying regions of a capacitor that have degraded due to oxygen vacancy migration. This work showcases ultrasonic attenuation as a non‐electrical and nondestructive technique of identifying oxygen vacancy degraded regions of an ...
Haley N. Jones, Clive A. Randall, Andrea P. Argüelles, Susan Trolier‐McKinstry   +3 more
wiley   +1 more source

Study of Constitutive Behavior of Ferroelectrics via Self-Consistent Modeling and Neutron Diffraction [PDF]

, 2007
The central goal of this study is to develop a reliable self-consistent model to describe the constitutive behavior of polycrystalline ferroelectrics and to predict their lattice strain and texture evolution. Starting with the model developed by Huber et
Motahari, Seyed-Maziar
core   +1 more source

Heat‐to‐Electricity Conversion Using Barium Strontium Titanate Multilayer Capacitors

Advanced Science, EarlyView.
Lead‐free barium strontium titanate multilayer capacitors convert waste heat into electricity via the Olsen electro‐thermodynamic cycle. These capacitors achieve an energy density of 3.7 J cm−3, comparable to the performance of lead‐based ceramics. Their high dielectric strength and broad operating temperature window below 100°C make them practical for
Fan Ni, Junning Li, Uros Prah, Youri Nouchokgwe, Yves Fleming, Ashwath Aravindhan, Moiz Khalil, Torsten Granzow, Sakyo Hirose, Veronika Kovacova, Emmanuel Defay   +10 more
wiley   +1 more source

Tailoring Dielectric Properties of Multilayer Composites Using Spark Plasma Sintering [PDF]

, 2007
A straightforward and simple way to produce well-densified ferroelectric ceramic composites with a full control of both architecture and properties using spark plasma sintering (SPS) is proposed. SPS main outcome is indeed to obtain high densification at
Estournès, Claude, Elissalde, Catherine, Maglione, Mario   +2 more
core   +1 more source