Results 61 to 70 of about 42,604 (255)

Physical Origin of Temperature Induced Activation Energy Switching in Electrically Conductive Cement

Advanced Science, EarlyView.
The temperature‐induced Arrhenius activation energy switching phenomenon of electrical conduction in electrically conductive cement originates from structural degradation within the biphasic ionic‐electronic conduction architecture and shows percolation‐governed characteristics: pore network opening dominates the low‐percolation regime with downward ...
Jiacheng Zhang, Xinyuan Ke, Andrew Heath, Richard J. Ball, Jiawei Xie, Jinchen Fan, Guisheng Li, Kevin Paine   +7 more
wiley   +1 more source

Physics‐Constrained Constitutive Learning of Rate‐Limiting Timescales for Efficient Hydrogen‐Based Direct Reduction for Green Steel Making

Advanced Science, EarlyView.
A conversion‐resolved constitutive framework is developed for the hydrogen‐based direct reduction of iron oxide pellets. Effective reaction and transport timescales are inferred directly from measured trajectories and mapped against operating conditions, pellet architecture, and composition. The analysis reveals how late‐stage transport control emerges
Anurag Bajpai, Barak Ratzker, Pasquale Cavaliere, Dierk Raabe   +3 more
wiley   +1 more source

Espumado de mezclas de silicato de sodio-wollastonita por microondas

Boletín de la Sociedad Española de Cerámica y Vidrio, 2004
The effect of the application of microwaves on the volume, porosity and thermal conductivity of sodium silicate-wollastonite mixtures was studied. The compositional range studied was 20-100 wt% sodium silicate.
Vargas, G., Vázquez, F., López, J., Méndez, J., Méndez, M., Pena, P.   +5 more
doaj  

Spatial distribution and morphometric and mineralogical features of air dust pollution in the impact zone of Trypilska Thermal Power Station

Geo&Bio, 2019
Spatial distribution of atmospheric dust pollution, dispersion, chemical composition and morphometric and mineralogical features of dust from fly ash of Trypilska Thermal Power Station (TPS) were investigated.
V. Dolin, O. Shcherbak, A. Samchuk, G. Pampukha   +3 more
doaj   +1 more source

Multi‐Scale Bionic Structure Constructs Biomass Flame‐Retardant Thermal Insulation Foam Material

Advanced Science, EarlyView.
Inspired by mussel adhesion and hierarchical brick‐and‐mortar architectures, a cellulose‐based biomimetic foam is constructed by anchoring bentonite nanosheets onto a polydopamine‐decorated cellulose nanofiber network. The resulting foam combines low thermal conductivity with intrinsic flame retardancy and full biodegradability, presenting a ...
Jianming Liao, Lijun Fan, Yunyuan Dong, Xuyu Bao, Xiaobin Chen, Qifu Zheng, Guanqing Zhang, Shen Wang, Wei Chen, Min Zhang, Shuaiming He   +10 more
wiley   +1 more source

Rate controls on silicate dissolution in cementitious environments

RILEM Technical Letters, 2017
The dissolution rate of silicate minerals and glasses in alkaline environments is of importance in cementitious systems due to its influences on: (a) early-age reactivity that affects the rate of strength gain and microstructure formation, and/or, (b ...
Tandre Oey, Yi-Hsuan Hsiao, Erika Callagon, Bu Wang, Isabella Pignatelli, Mathieu Bauchy, Gaurav N. Sant   +6 more
doaj   +1 more source

First-principles investigation of high-kappa dielectrics: Comparison between the silicates and oxides of hafnium and zirconium

Using density-functional theory, we investigate the structural, vibrational, and dielectric properties of Hf and Zr oxides and silicates which have drawn considerable attention as alternative high-kappa materials.
Rignanese, G. M., Gonze, X., Jun, G., Cho, K. J., Pasquarello, Alfredo   +4 more
core   +1 more source

The Detection of Crystalline Silicates in Ultraluminous Infrared Galaxies

, 2006
International audienceSilicates are an important component of interstellar dust, and the structure of these grains (amorphous or crystalline) is sensitive to the local physical conditions. We have studied the infrared spectra of a sample of ultraluminous
Tielens, A., Houck, J. R., Sargent, B., Cami, J., Charmandaris, Vassilis, Soifer, B. T., Sloan, G. C., Spoon, Henrik W. W., Armus, Lee   +8 more
core   +1 more source

Phenyl Silicates with Substituted Catecholate Ligands: Synthesis, Structural Studies and Reactivity

, 2021
International audienceWhile the generation of aryl radicals by photoredox catalysis is well-documented under reductive conditions, it has remained challenging under an oxidative pathway.
Khaoula Jaouadi, Ollivier, Cyril, Etienne Derat, Zhang, Heng‐rui, Fensterbank, Louis, Derat, Etienne, Etienne Levernier, Levernier, Etienne, Corcé, Vincent, Gontard, Geoffrey, Claire Troufflard, Cyril Ollivier, Vincent Corcé, Heng‐Rui Zhang, Laurence Grimaud, Troufflard, Claire, Grimaud, Laurence, Louis Fensterbank, Aurélie Bernard, Geoffrey Gontard, Jaouadi, Khaoula, Bernard, Aurélie   +21 more
core   +1 more source

Battery‐Inspired Electrochemical Synapses for Neuromorphic Applications

Advanced Science, EarlyView.
Battery‐ion‐inspired synaptic devices integrate diverse electrolyte systems (solid, ion‐gel, liquid) with transition metal oxides, two‐dimensional materials, and organic channels to regulate ion‐electron coupling. By tailoring ion transport and host interactions, these platforms enable controllable plasticity and energy‐efficient implementations for ...
Won Woo Lee, SeongCheol Jang, Wangmyung Choi, Jaewon Park, Jaehyun Hur, Hocheon Yoo, Hyun‐Suk Kim   +6 more
wiley   +1 more source