Results 41 to 50 of about 6,643 (169)

Effect of (Al/Ta) co-doped on dielectric properties of CdCu3Ti4O ceramics

Journal of Advanced Dielectrics
In this work, dense CdCu3(Al[Formula: see text]Ta[Formula: see text]Ti[Formula: see text]O[Formula: see text] ceramics were prepared by a conventional solid phase method. The effect of Al[Formula: see text]/Ta[Formula: see text] dopants on the dielectric
Huan Liu, Zhanhui Peng, Yulin Chen, Bi Chen, Di Wu, Lingling Wei, Pengfei Liang, Xiaolian Chao, Zupei Yang   +8 more
doaj   +1 more source

Impedance and AC conductivity study of nano crystalline, fine grained multiferroic bismuth ferrite (BiFeO3), synthesized by microwave sintering

AIP Advances, 2015
In this paper, major reduction in sintering time,temperautre and significant improvement over final density of sitnered sample is reported for the microwave sintered nanocrystalline BiFeO3 (BFO) ceramic.
Jayant Kolte, Paresh H. Salame, A. S. Daryapurkar, P. Gopalan   +3 more
doaj   +1 more source

Hidden Bioavailable Dissolved Organic Matter in the Deep Northwestern Pacific Ocean

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract The deep ocean is widely viewed as a stable reservoir of dissolved organic carbon (DOC) that is highly resistant to microbial degradation. However, this paradigm may be oversimplified. In a cross‐latitude survey conducted in the northwestern Pacific Ocean (155°E, 28.5°N–41.5°N), bulk DOC concentrations were found to be relatively constant ...
Yixian Li, Tao Liu, Xiaolin Li, Dalin Shi, Yuan Shen   +4 more
wiley   +1 more source

The Fundamental Mechanism Behind Colossal Permittivity in Oxides

Advanced Materials, Volume 31, Issue 51, December 20, 2019., 2019
The atomic‐scale origin of colossal permittivity in CaCu3Ti4O12 is shown to be the result of a metallic interface between its grains and the intergrain material, CuxO. When under an applied electric field, interface charges respond by flowing within the grain edge, resulting in a large polarization of the electronic charge that gives rise to colossal ...
Ned T. Taylor, Francis H. Davies, Shane G. Davies, Conor J. Price, Steven P. Hepplestone   +4 more
wiley   +1 more source

Dielectric behavior of Copper Tantalum Oxide

, 2003
A thorough investigation of the dielectric properties of Cu2Ta4O12, a material crystallizing in a pseudo-cubic, perovskite-derived structure is presented.
A. Loidl, A. Reller, B. Renner, Jonscher A. K., M. Schetter, Mott N. F., P. Lunkenheimer, S. G. Ebbinghaus   +7 more
core   +1 more source

From Synthesis to Applications: Copper Calcium Titanate (CCTO) and its Magnetic and Photocatalytic Properties

ChemistryOpen, Volume 8, Issue 7, Page 922-950, July 2019., 2019
The synthesis and the sintering approaches, the dopant elements used, as well as the applications of copper calcium titanate (CCTO) have been reported. In addition to the dielectrical properties useful to energy storage devices, CCTO could serve as magnetic materials as well as photo‐ and photoelectro‐catalytic materials with a very good performance in
Sara Kawrani, Madona Boulos, David Cornu, Mikhael Bechelany   +3 more
wiley   +1 more source

Investigations on Structural, Mechanical, and Dielectric Properties of PVDF/Ceramic Composites

Journal of Engineering, Volume 2015, Issue 1, 2015., 2015
Polymer ceramic composites are widely used for embedded capacitor application. In the present work PVDF has been used as a matrix and CCTO and LaCCTO have been used as reinforcement. Extrusion process has been used for the synthesis of composites. X‐ray diffraction (XRD) patterns confirm the formation of single phase CCTO, and LaCCTO in its pure as ...
Anshuman Srivastava, Karun Kumar Jana, Pralay Maiti, Devendra Kumar, Om Parkash, H. P. S. Abdul Khalil   +5 more
wiley   +1 more source

Non-intrinsic origin of the Colossal Dielectric Constants in CaCu3Ti4O12

, 2004
The dielectric properties of CaCu3Ti4O12, a material showing colossal values of the dielectric constant, were investigated in a broad temperature and frequency range extending up to 1.3 GHz.
A. Loidl, A.K. Jonscher, P. Lunkenheimer, R. Fichtl, S. G. Ebbinghaus   +4 more
core   +1 more source

Weakly‐coupled barium titanate stannate‐based relaxors as energy storage materials

Journal of the American Ceramic Society, Volume 108, Issue 6, June 2025.
This study explores the development of lead‐free relaxor ferroelectrics, specifically (1−x)Ba(Ti0.93Sn0.07)O3−xBiYO3 (BTS7‐BY) solid solutions, which offer potential for high‐efficiency energy storage applications. By adjusting the BiYO3 content, we achieved a transition from ferroelectric to weakly‐coupled relaxor behavior, resulting in improved ...
Eva Kröll, Lara Devecioglu, Andrei N. Salak, Lukas Piotrowsky, Vladimir V. Shvartsman, Doru C. Lupascu   +5 more
wiley   +1 more source

The role of calcination temperature on enhancing the dielectric and optical properties of CaCu3Ti4O11.8Cl0.2 material

Results in Physics
The role of calcination temperature on phase stability and dielectric properties improvement of CaCu3Ti4O11.8Cl0.2 was studied. Analysis using optical properties indicated a redshift of the absorption peaks, while the band gap energy was decreased up to ...
Najwa Gouitaa, Fatima Zahra Ahjyaje, Taj-dine Lamcharfi, Jamal Houssaini, Mahjoub Daoudy, Farid Abdi   +5 more
doaj   +1 more source