Results 31 to 40 of about 18,880 (284)

Giant electrocaloric effect in the thin film relaxor ferroelectric 0.9 PbMg1/3Nb2/3O3–0.1 PbTiO3 near room temperature. [PDF]

, 2006
We have recently observed a giant electrocaloric effect (12 K in 25 V) in 350 nm sol-gel PbZr0.95Ti0.05O3 films near the ferroelectric Curie temperature of 242oC.
Zhang, Qi, Mischenko, A. S., Zhang, Q, Zhang, Q., Whatmore, Roger W., J. F. Scott, Whatmore, RW, Mischenko, AS, Scott, JF, Scott, J. F., A. S. Mischenko, R. W. Whatmore, Mathurb, N. D., Q. Zhang, Mathur, ND, N. D. Mathur, Mathur, N. D., Mischenkoa, A. S., Whatmore, R. W.   +18 more
core   +1 more source

On the Enhancement of Energy Storage Performance in Modified Relaxor Ferroelectric Ceramics for Pulsed Power Applications

Crystals, 2023
Relaxor-type ferroelectrics show important potential in energy storage fields due to their significantly enhanced energy performance and good temperature stability compared to normal ferroelectrics. Here, a novel, high-performance ternary composition, (0.
Hao Zhang, Zhe Zhu, Zhonghua Yao, Hua Hao, Lingyun Wang, Minghe Cao, Hanxing Liu   +6 more
doaj   +1 more source

Simultaneously achieving giant piezoelectricity and record coercive field enhancement in relaxor-based ferroelectric crystals

Nature Communications, 2022
High-drive electromechanical applications require ferroelectrics accounting for a large coercive field and high piezoelectricity simultaneously but it is still a challenge. Here, the authors demonstrate it in a relaxor-based ferroelectric crystal.
Liya Yang, Houbing Huang, Zengzhe Xi, Limei Zheng, Shiqi Xu, Gang Tian, Yuzhi Zhai, Feifei Guo, Lingping Kong, Yonggang Wang, Weiming Lü, Long Yuan, Minglei Zhao, Haiwu Zheng, Gang Liu   +14 more
doaj   +1 more source

Electrocaloric Cooling - A New Application of Relaxor Ferroelectrics [PDF]

, 2018
Until now, relaxor ferroelectrics are considered as a class of disordered materials possessing peculiar structures and properties which are not yet generalized into a universal model explaining the significant amount of experimental data available.
Gerlach, G., G. Gerlach, Suchaneck, G., G. Suchaneck   +3 more
core   +1 more source

Polarization reversal via a transient relaxor state in nonergodic relaxors near freezing temperature

Journal of Materiomics, 2019
Among the unresolved issues in the study of relaxor ferroelectrics is the role of freezing temperature, across which the dynamics of polarization reversal in relaxor ferroelectrics changes.
Chang-Hyo Hong, Hanzheng Guo, Xiaoli Tan, John E. Daniels, Wook Jo   +4 more
doaj   +1 more source

Nanoscale phase quantification in lead-free (Bi1/2Na1/2)TiO₃-BaTiO₃ relaxor ferroelectrics by means of ²³Na NMR [PDF]

, 2023
We address the unsolved question on the structure of relaxor ferroelectrics at the atomic level by characterizing lead-free piezoceramic solid solutions (100−x)(Bi1/2Na1/2)TiO₃−xBaTiO₃ (BNT−xBT) (for x=1,4,6, and 15).
Jo, Wook, Sapper, Eva, Dittmer, Robert, Buntkowsky, Gerd, Breitzke, Hergen, Rödel, Jürgen, Groszewicz, Pedro B.   +6 more
core   +1 more source

Ferroelectric Relaxor Quantum Crystals [PDF]

Crystals, 2018
A discussion is given of ferroelectrics (FEs) that have their Curie temperatures Tc very near absolute zero. These have differences in their dynamics in comparison with higher-temperature systems, since domain wall motion occurs via quantum mechanical tunneling and not by thermally activated diffusion.
openaire   +4 more sources

Ultrahigh energy density and improved discharged efficiency in bismuth sodium titanate based relaxor ferroelectrics with A-site vacancy

Journal of Materiomics, 2018
Novel A-site deficient (1-x-y)Bi0.5Na0.5TiO3-xBaTiO3-yBi0.2Sr0.7TiO3 lead-free relaxor ferroelectrics have been explored for energy storage property. Particularly slim polarization hysteresis (P-E) loops are observed in 0.655Bi0.5Na0.5TiO3-0.065BaTiO3-0 ...
Xiao Liu, Jing Shi, Fangyuan Zhu, Huiling Du, Tangyuan Li, Xiangchun Liu, Hai Lu   +6 more
doaj   +1 more source

Giant dynamic electromechanical response via field driven pseudo-ergodicity in nonergodic relaxors

Nature Communications, 2023
Enhanced electromechanical response can commonly be found during the crossover from normal to relaxor ferroelectric state, making relaxors to be potential candidates for actuators.
He Qi, Tengfei Hu, Shiqing Deng, Hui Liu, Zhengqian Fu, Jun Chen   +5 more
doaj   +1 more source

Relaxor Behaviour in Ferroelectric Ceramics [PDF]

, 2012
The chapter shows the studies carried out on several relaxor ferroelectric ceramic materials, which have been developed by the present authors. Lanthanum modified lead zirconatetitanate ceramics will be evaluated considering different La3+ concentrations and Zr/Ti ratios.
Peláiz Barranco, Aimé, Calderón Piñar, Francisco, García Zaldívar, Osmany, González -Abreu, Yuslin   +3 more
openaire   +2 more sources