Results 81 to 90 of about 1,486,722 (375)

Computational and experimental investigations of the giant dielectric property of Na1/2Y1/2Cu3Ti4O12 ceramics

Scientific Reports, 2023
A modified sol-gel method was used to successfully produce Na1/2Y1/2Cu3Ti4O12 ceramics with high dielectric permittivity. The dielectric permittivity of Na1/2Y1/2Cu3Ti4O12 ceramics reaches values larger than 104 at room temperature and 1 kHz.
Jakkree Boonlakhorn, Punpatsorn Suksangrat, Weerachai Sarakorn, Sriprajak Krongsuk, Prasit Thongbai, Pornjuk Srepusharawoot   +5 more
doaj   +1 more source

Soft Beats: A Dielectric Elastomer‐Based Ventricular Assist Device for Next‐Gen Heart Failure Management

Advanced Engineering Materials, EarlyView.
The dielectric elastomer‐based electropneumatic device (DE‐EPD) is a vacuum‐assisted ventricular assist device (VAD) that delivers high performance (85 mmHg, 6.8 L min−1) with low power consumption. Unlike traditional motor‐driven VADs, it is lightweight, quiet, energy‐efficient, and provides pulsatile flow. Validated in a simulated circulation system,
Amine Benouhiba, Armando Walter, Silje Ekroll Jahren, Francesco Clavica, Dominik Obrist, Yoan Civet, Yves Perriard   +6 more
wiley   +1 more source

Enhanced humidity sensing properties of Ta2O5 and ITO doped rutile-TiO2 porous ceramics

Scientific Reports
In this study, we investigated the humidity sensing properties of TiO2-based ceramics doped with tantalum pentoxide (Ta2O5) and indium tin oxide (ITO).
Jurimart Wongsricha, Kaniknun Sreejivungsa, Noppakorn Thanamoon, Viyada Harnchana, Pornjuk Srepusharawoot, Nutthakritta Phromviyo, Wirat Jarernboon, Prasit Thongbai   +7 more
doaj   +1 more source

First-order phase transition and unexpected rigid rotation mode in hybrid improper ferroelectric (La, Al) co-substituted Ca3Ti2O7 ceramics

Journal of Materiomics, 2019
Ca3Ti2O7 with Ruddlesden-Popper structure exhibits the largest polarization among the known hybrid improper ferroelectrics. However, the high Curie temperature impedes the thorough study of phase transition through dielectric characterization.
Z.Z. Hu, J.J. Lu, B.H. Chen, T.T. Gao, X.Q. Liu, W. Wen, X.M. Chen   +6 more
doaj   +1 more source

Theory of ac electrokinetic behavior of spheroidal cell suspensions with an intrinsic dispersion

, 2005
The dielectric dispersion, dielectrophoretic (DEP) and electrorotational (ER) spectra of spheroidal biological cell suspensions with an intrinsic dispersion in the constituent dielectric constants are investigated. By means of the spectral representation
D.J. Bergman, F. Bordi, G. Fuhr, G. Schwarz, J. Gimsa, J. Gimsa, J. Gimsa, J. Lei, J. P. Huang, J.M. Cruz, J.P. Huang, J.P. Huang, K. Asami, K. Asami, K. Asami, K. W. Yu, K.R. Foster, L. Gao, L. Gao, Lei Gao, M. Kriegmaier, R. Paul, R. Paul, R.D. Miller, T.N. Tombs, X.B. Wang, X.B. Wang, X.F. Zhou   +27 more
core   +1 more source

Microcellular Poly (Ethylene‐Co‐Vinyl Acetate)/Lignin Nanocomposites for Soft Ferroelectrets

Advanced Engineering Materials, EarlyView.
Lignin valorization for advanced porous polymer nanocomposites development and an upscaling route for continuous manufacturing of soft ferroelectrets for energy harvesting are studied. This work examines the role of lignin and carbon nanotubes (CNT) in modifying the mechanical, dielectric, and ferroelectret properties of poly (ethylene‐co‐vinyl acetate)
Yuchen Lian, Zihe Li, Chris Bowen, James Roscow, Alan M. Wemyss, Chaoying Wan   +5 more
wiley   +1 more source

Mechanisms of enhanced performance in Zr4+/Ta5+ codoped rutile–TiO2 ceramics via broadband dielectric spectroscopy

Scientific Reports
Aliovalent dopant codoped rutile–TiO2 materials have garnered attention due to their excellent performance properties, characterized by low loss tangent (tanδ), high dielectric permittivity (ε′), and stable ε′ over a broad temperature range.
Yasumin Mingmuang, Narong Chanlek, Masaki Takesada, Viyada Harnchana, Wirat Jarernboon, Pairot Moontragoon, Pornjuk Srepusharawoot, Ekaphan Swatsitang, Prasit Thongbai   +8 more
doaj   +1 more source

Lead-free piezoelectric KNN-BZ-BNT films with a vertical morphotropic phase boundary

AIP Advances, 2015
The lead-free piezoelectric 0.915K0.5Na0.5NbO3-0.075BaZrO3-0.01Bi0.5Na0.5TiO3 (0.915KNN-0.075BZ-0.01BNT) films were prepared by a chemical solution deposition method.
Wen Chen, Jinyan Zhao, Lingyan Wang, Wei Ren, Ming Liu   +4 more
doaj   +1 more source

Wideband polarization-independent anomalous reflection metasurface with multiple resonance modes [PDF]

Journal of Advanced Dielectrics, 2017
An ultra-thin metasurface is proposed to realize wideband polarization-independent anomalous reflection. The sub-wavelength resonator can produce different resonance modes, which are the result of the combined effect of dielectric and the metallic ...
Guoxiang Dong, Song Xia, Yongyong Zhuang, Hongyu Shi, Zhan Zhang, Yuchen He, Anxue Zhang, Xiaoyong Wei, Zhuo Xu   +8 more
doaj   +1 more source

First-principles study of vibrational and dielectric properties of {\beta}-Si3N4

, 2011
First-principles calculations have been conducted to study the structural, vibrational and dielectric properties of {\beta}-Si3N4. Calculations of the zone-center optical-mode frequencies (including LO-TO splittings), Born effective charge tensors for ...
F. L. Riley, Laifei Cheng, Litong Zhang, Qingfeng Zeng, R. N. Katz, S. H. Vosko, X. Gonze, X. Gonze, Yongdong Xu, Yongqing Cai   +9 more
core   +1 more source