Results 51 to 60 of about 2,365 (229)

High-entropy relaxor ferroelectric ceramics for ultrahigh energy storage

Nature Communications
Dielectric ceramic capacitors with ultrahigh power densities are fundamental to modern electrical devices. Nonetheless, the poor energy density confined to the low breakdown strength is a long-standing bottleneck in developing desirable dielectric ...
Haonan Peng, Tiantian Wu, Zhen Liu, Zhengqian Fu, Dong Wang, Yanshuang Hao, Fangfang Xu, Genshui Wang, Junhao Chu   +8 more
doaj   +1 more source

Hydrogen (H2) Recovery From Hydrogen Sulfide (H2S): Current Technologies, Challenges, and Future Outlook

Advanced Science, EarlyView.
ABSTRACT Hydrogen sulfide (H2S) can be transformed into hydrogen (H2) through several chemical and catalytic processes, offering a promising route for both waste treatment and clean H2 production. This colorless, flammable, and toxic gas is found abundantly in swamps, volcanoes, hot springs, sewages, other natural gas fields, and even in refineries and
Divyesh Cirikonda, Astrid Campos‐Mata, Sehmus Ozden, Shreyasi Chattopadhyay, Pulickel M. Ajayan   +4 more
wiley   +1 more source

Advancing first-principles dielectric property prediction of complex microwave materials: an elemental-unit decomposition approach

npj Computational Materials
Tungsten-bronze-type material Ba6-3x RE 8+2x Ti18O54, (RE = rare earth elements) is an important microwave dielectric that has shown great promises for future miniaturization of microwave devices because of its high dielectric constant, low loss, and ...
Yabei Wu, Peihong Zhang, Wenqing Zhang
doaj   +1 more source

Structural characterization and ferroelectric properties of strontium barium niobate (Sr xBa1-xNb2O6) thin films

Materials Research, 2001
Strontium barium niobate (SBN) thin films of good quality were deposited on Pt/Ti/SiO2/Si substrate using a polymeric resin containing metallic ions. Films were crystallized at different temperatures and for different duration of time.
R.G. Mendes, E.B. Araújo, J.A. Eiras
doaj   +1 more source

Machine Learning‐Assisted Design and Performance Prediction of a Compact Dual‐Band Polarization‐Insensitive THz Metamaterial Absorber for Skin‐Cancer‐Related Refractive‐Index Sensing

Advanced Electronic Materials, EarlyView.
A compact QASRR‐based THz metamaterial absorber enables polarization‐insensitive dual‐band absorption and skin‐cancer‐related refractive‐index sensing through measurable resonance shifts. Field, surface‐current, and circuit analyses clarify the dual‐resonance mechanism, while StackNet‐assisted prediction accurately estimates the simulated absorption ...
Md. Murad Kabir Nipun, S. M. Rifatur Rana, Md. Golam Morshed, Imrose Jahan, F. A. Sabbir Ahamed, Md. Jahedul Islam   +5 more
wiley   +1 more source

], with an Unprecedented Tungsten Bronze‐Related Layer Structure.

, 2004
[C2N2H10](0.5)[ScF4] exhibits isolated anionic layers of corner-linked ScF6 octahedra enclosing 3-, 4-, 5- and 6-membered rings, with features reminiscent of both hexagonal and tetragonal tungsten bronze-type structures.
Slawin, Alexandra Martha Zoya, Stephens, N F, Stephens, NF, Slawin, A M Z, Lightfoot, P, Alexandra M. Z. Slawin, Lightfoot, Philip, Nicholas F. Stephens, Philip Lightfoot   +8 more
core   +1 more source

Phonons and relaxations in unfilled tetragonal tungsten-bronzes

OAJ Materials and Devices, 2021
The lead-free unfilled tetragonal tungsten-bronzes SBN and CBN are investigated by Raman, infrared and high-frequency dielectric spectroscopies. The substitution in the different channels affects phonons as well as relaxations. Relaxations in SBN show similar qualitative behaviour on increasing Sr content and relaxor behaviour, but for the extreme ...
Buixaderas, Elena, Dec, Jan
openaire   +4 more sources

A Physics Constrained Machine Learning Pipeline for Young's Modulus Prediction in Multimaterial Hyperelastic Cylinders Guided by Contact Mechanics

Advanced Intelligent Discovery, EarlyView.
A physics‐guided machine learning framework estimates Young's modulus in multilayered multimaterial hyperelastic cylinders using contact mechanics. A semiempirical stiffness law is embedded into a custom neural network, ensuring physically consistent predictions. Validation against experimental and numerical data on C.
Christoforos Rekatsinas, Panagiotis Krokidas, Vasileios Vavourakis, Clara Essmann, George Giannakopoulos   +4 more
wiley   +1 more source

Análise cristalográfica da solução sólida com estrutura tipo Tungstênio Bronze de niobato de potássio e estrôncio dopado com ferro Crystallographic analysis of the solid solution of iron doped potassium strontium niobate with tetragonal tungsten bronze structure

Química Nova, 2010
Solid solution of iron doped potassium strontium niobate with KSr2(FeNb4)O15-Δ stoichiometry was prepared by high efficiency ball milling method. Structural characterization was carried out by X-ray diffraction. Crystalline structure was analyzed by
Silvania Lanfredi, Marcos A. L. Nobre, Alan R. F. Lima   +2 more
doaj   +1 more source

Structural, Dielectric, and Magnetic Properties of Ba2Bi9-xFe5+xTi8O39 Tetragonal Tungsten Bronze Ceramics

Materials Research Express, 2023
The formulations of Ba _2 Bi _9-x Fe _5+x Ti _8 O _39 (0 ≤ x ≤ 9) (BBFTO) tetragonal tungsten bronze structures were synthesized by the conventional solid-state method.
Sajida Shaikh, Fayaz Hussain
doaj   +1 more source