Results 31 to 40 of about 8,757 (280)

Absence of ferroelectricity in BiMnO3 ceramics [PDF]

Journal of Applied Physics, 2012
We performed factor-group analysis of all phonons in possible monoclinic C2/c and C2 structures of BiMnO3 and compared it with our experimental infrared and Raman spectra. We conclude that the crystal structure is centrosymmetric C2/c in the whole investigated temperature range from 10 to 550 K, therefore BiMnO3 cannot be ferroelectric.
Goian, V., Kamba, S., Savinov, M., Nuzhnyy, D., Borodavka, F., Vanek, P., Belik, A. A.   +6 more
openaire   +2 more sources

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

Ordered coalescence of nano-crystals in alkaline niobate ceramics with high remanent polarization

Journal of Materiomics, 2017
Lead-free alkali niobates Na0.5K0.5NbO3 (NKN) ceramics, with significantly enhanced ferroelectric remanent polarization (Pr), were prepared using Spark Plasma Sintering (SPS).
Zhijian Shen, Daniel Grüner, Mirva Eriksson, Lyubov M. Belova, Ce-Wen Nan, Haixue Yan   +5 more
doaj   +1 more source

Crystal Structure, Phase Transitions and Photoferroelectric Properties of KNbO3-Based Lead-Free Ferroelectric Ceramics: A Brief Review

Frontiers in Materials, 2020
Ferroelectric KNbO3 (KN) ceramics were first fabricated in the 1950s, however, their use in commercial technical applications has been hampered by inherently challenging processing difficulties. In the early 1990s, the interest in KN ceramics was revived
Dawei Wang, Ge Wang, Zhilun Lu, Zhilun Lu, Zaid Al-Jlaihawi, Antonio Feteira   +5 more
doaj   +1 more source

B-site non-stoichiometric (Pb0.97La0.02)(Zr0.95Ti0.05)O3 antiferroelectric ceramics for energy storage

Journal of Asian Ceramic Societies, 2018
Non-stoichiometric (Pb0.97La0.02)(Zr0.95Ti0.05)1+yO3 (y = −0.03, −0.01, 0.01 and 0.03) antiferroelectric ceramics were successfully prepared via a solid-state reaction route.
Zhong-Hua Niu, Yan-Ping Jiang, Xin-Gui Tang, Qiu-Xiang Liu, Wen-Hua Li   +4 more
doaj   +1 more source

Giant dielectric permittivity in ferroelectric thin films : domain wall ping pong

, 2015
This study was supported by the National Key Basic Research Program of China (No. 2014CB921004), the National Natural Science Foundation of China (Nos.
Scott, James Floyd, Wei Zhang, D., Seong Hwang, C., Jian Meng, X., Hyuk Park, M., Jin Kim, Y., Quan Jiang, A., Yoo, S.   +7 more
core   +1 more source

Piezoelectric sensing coating for real time impact detection and location on aircraft structures [PDF]

, 2012
Flexible, light weight and low cost electroactive coating has been fabricated by the dispersion of inorganic ferroelectric submicron particles in a polyurethane matrix. BaTiO3 particles have a mean diameter of 300 nm. The poling process and the influence
Dantras, Eric, Lacabanne, Colette, Capsal, Jean-Fabien, David, Charlotte   +3 more
core   +1 more source

Hot-pressed transparent PLZT ceramics from low cost chemical processing

Materials Research, 2001
Lanthanum-modified lead zirconate titanate (PLZT) ceramics were obtained with high transmittance in the visible range by a combination of an inexpensive chemical processing and hot pressing.
I.A. Santos, C. Endo, A.L. Zanin, M.H. Lente, J.A. Eiras, D. Garcia   +5 more
doaj   +1 more source

Encyclopedia of 2D β′‐In2Se3 Growth Using Chemical Vapor Deposition: The Effects of Synthesis Parameters Onto Material Quality

Advanced Engineering Materials, EarlyView.
A distinct semi‐confined inner‐tube chemical vapor deposition geometry enables reproducible, large‐area growth of phase‐pure 2D β′‐In2Se3 from InI + Se precursors. Engineering local vapor transport and optimizing precursor delivery and temperature–time conditions yield uniform continuous films.
Dasun P. W. Guruge, P. Sanju S. Panawala, Joseph F. S. Fernando, Zhenhuan Chen, Chao Zhang, Dong‐Chen Qi, Liangzhi Kou, Konstantin L. Firestein, Dmitri V. Golberg   +8 more
wiley   +1 more source

Dielectric Anisotropy in Partially Grain-Oriented Bi2VO5.5 Ceramics

Active and Passive Electronic Components, 1995
Ceramics obtained from quenching melts of prereacted polycrystalline Bi2V5.5 exhibit grain orientation (~ 55%). Microstructural studies carried out using scanning electron microscopy (SEM) on subsequently annealed ceramics show ferroelectric domains ...
K. V. R. Prasad, K. B. R. Varma
doaj   +1 more source