Results 31 to 40 of about 288,002 (309)

Relaxor Ferroelectric Polymers: Insight into High Electrical Energy Storage Properties from a Molecular Perspective

Small Science, 2021
Relaxor ferroelectric polymers exhibit both high dielectric constants and low remnant polarization and thus deliver much higher energy densities and greater charge–discharge efficiencies than normal ferroelectrics for capacitive energy storage ...
Yang Liu, Yen-Ting Lin, Aziguli Haibibu, Wenhan Xu, Yao Zhou, Li Li, Seong H. Kim, Qing Wang   +7 more
doaj   +1 more source

Connecting the Multiscale Structure with Macroscopic Response of Relaxor Ferroelectrics

Advanced Functional Materials, 2020
Lead‐based relaxor ferroelectrics are characterized by outstanding piezoelectric and dielectric properties, making them useful in a wide range of applications.
M. Otoničar, A. Bradeško, Lovro Fulanović, T. Kos, H. Uršič, A. Benčan, M. Cabral, A. Henriques, Jacob L. Jones, L. Riemer, Dragan Damjanovic, G. Dražič, B. Malič, T. Rojac   +13 more
semanticscholar   +1 more source

NMR and the local structure of relaxors [PDF]

Science of Sintering, 2002
The relaxor transition in cubic perovskite relaxors (PMN, PSN and PST) and tungsten bronze relaxor (SBN) has been studied by NMR. The observed spectra are composed of a narrow -1/2 « 1/2 central transition superimposed on a broad background due to ...
Blinc R., Zalar B., Gregorovič Alan
doaj   +1 more source

An Overview of Linear Dielectric Polymers and Their Nanocomposites for Energy Storage

Molecules, 2021
As one of the most important energy storage devices, dielectric capacitors have attracted increasing attention because of their ultrahigh power density, which allows them to play a critical role in many high-power electrical systems.
Lvye Dou, Yuan-Hua Lin, Ce-Wen Nan
doaj   +1 more source

Finite-Temperature Properties of Ba(Zr,Ti)O$_3$ Relaxors From First Principles [PDF]

, 2012
A first-principles-based technique is developed to investigate properties of Ba(Zr,Ti)O$_3$ relaxor ferroelectrics as a function of temperature. The use of this scheme provides answers to important, unresolved and/or controversial questions, such as ...
Akbarzadeh, A. R., Al-Barakaty, A., Bellaiche, L., Prosandeev, S., Walter, Eric J.   +4 more
core   +3 more sources

Time-Resolved Nanobeam X-ray Diffraction of a Relaxor Ferroelectric Single Crystal under an Alternating Electric Field

Crystals, 2021
Lead-containing relaxor ferroelectrics show enormous piezoelectric capabilities relating to their heterogeneous structures. Time-resolved nanobeam X-ray diffraction reveals the time and position dependences of the local lattice strain on a relaxor ...
Shinobu Aoyagi, Ayumi Aoyagi, Hiroaki Takeda, Hitoshi Osawa, Kazushi Sumitani, Yasuhiko Imai, Shigeru Kimura   +6 more
doaj   +1 more source

Temperature-dependent energy storage characterization of Pb-free relaxor ferroelectrics [PDF]

Journal of Advanced Dielectrics, 2020
The energy storage properties of (1−x)Bi0.5Na0.5TiO3–xBaTiO3(0≤x≤0.08) (BNT–BT) ceramics obtained via sol–gel method are determined from the polarization versus electric field (P–E) loops at various temperatures. The energy storage densities are observed
Sarir Uddin, Guang-Ping Zheng, Asif Khan, Muhammad Riaz Khan, Banaras Khan   +4 more
doaj   +1 more source

Theoretical prediction of electrocaloric effect based on non-linear behaviors of dielectric permittivity under temperature and electric fields

AIP Advances, 2015
The electrocaloric (EC) effect has been paid great attentions recently for applications on cooling or electricity generation. However, the directly commercial measurement equipment for the effect is still unavailable.
Hongbo Liu, Xue Yang
doaj   +1 more source

Enhanced electrocaloric effect in compositional driven potassium sodium niobate‐based relaxor ferroelectrics

Journal of Materials Research, 2020
Lead‐free ferroelectric electrocaloric ceramics that could convert electrical energy into heat are the promising candidate for environment‐friendly cooling devices. For refrigeration devices, a large temperature change (ΔT) and good temperature stability
N. Zhang, Ting Zheng, Chunlin Zhao, Xiao-yao Wei, Jiagang Wu   +4 more
semanticscholar   +1 more source

First Principles Theories of Piezoelectric Materials

, 2007
Piezoelectrics have long been studied using parameterized models fit to experimental data, starting with the work of Devonshire in 1954. Much has been learned using such approaches, but they can also miss major phenomena if the materials properties are ...
Cohen, R. E.
core   +1 more source