Results 51 to 60 of about 1,129,458 (281)

Strength optimization of reactive powder concrete

Revista IBRACON de Estruturas e Materiais, 2020
: Recent reports on reactive powder concrete address important aspects regarding its performance. Several techniques are used to improve the design of such concretes. Ultra-high compressive strengths have been reported with the application of pre-setting
Abrahão Bernardo Rohden, Ana Paula Kirchheim, Denise Dal Molin   +2 more
doaj   +1 more source

Spectroscopic Investigation of Polysulfide Redox Evolution in Catholyte Solutions for Potassium–Sulfur Batteries

Advanced Functional Materials, EarlyView.
Potassium–sulfur batteries are investigated using UV–vis spectroscopy to track the evolution of potassium polysulfide species at elevated temperature. The study reveals sulfur radical anions as key intermediates and shows how solvent composition and cell design influence polysulfide stability, redox behavior, and cycling performance, providing insights
Chiara Morini, Dawid Kasprzak, Lincoln Crowe, Cecilia Spedalieri, Johannes Baller, Naiyu Qi, Fariza Kalyk, Gustav Graeber   +7 more
wiley   +1 more source

Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

Advanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje, Wilson Henao, Tania Rodenas, Patricia Concepción, Virginia Pérez Dieste, Alexander Missyul, Giovanni Agostini, Gonzalo Prieto   +7 more
wiley   +1 more source

Water Permeates and Plasticizes Amorphous Carbon Dots: Unraveling the Inner Accessibility of the Nanoparticles by Glass Transition Studies

Advanced Materials, EarlyView.
The water permeability of amorphous carbon dots (CDs) is demonstrated by investigating their plasticization. Novel polyamide‐based and amorphous nanoparticles are synthesized by controlling their inner packing density. Water plasticization is evidenced by the decrease of the CDs glass transition temperature with increasing the hydration degree.
Elisa Sturabotti, Valerio Di Lisio, Lucia Cardo, Alessandro Camilli, Estela Moretón Alfonsín, Daniele Cangialosi, Amaia Iturrospe Ibarra, Arantxa Arbe, Maurizio Prato   +8 more
wiley   +1 more source

Non-Structural Vibro-Compressed Concrete Incorporating Industrial Wastes

Recycling
This study presents more eco-efficient concrete formulations for precast vibro-compressed masonry blocks. The proposed formulations incorporated industrial waste, glass powder (GP), and quartz powder (QP), in which natural aggregate was partially ...
Gabriela Bertazzi Pignotti, Ana Mafalda Matos, Fernanda Giannotti da Silva Ferreira   +2 more
doaj   +1 more source

High Light Utilization and Color Rendering in Vacuum‐Deposited Semitransparent Perovskite Solar Cells

Advanced Materials, EarlyView.
In this work, low bandgap (≈1.55 eV) semitransparent perovskite solar cells (ST‐PSCs) having thin (thickness < ≈100 nm) perovskite layers and transparent conductive oxide‐based rear electrodes are fabricated using vacuum‐deposition methods. Two different ST‐PSCs demonstrated a high light utilization efficiency value of 4.2 (PCE: 9.26% and AVT: 45.3 ...
Abhyuday Paliwal, Manuel Romero, Lennart van den Hengel, Nathan Rodkey, Kassio P. S. Zanoni, Gabriel Lozano, Cristina Roldán‐Carmona, Michele Sessolo, Hernán Míguez, Henk J. Bolink   +9 more
wiley   +1 more source

Thermal Expansion of Fused Quartz Powder Compacts

Journal of the Ceramic Society of Japan, 1997
The fused quartz is one of the most typical materials of low thermal expansion. However, it was found that compacts prepared by isostatic compression of ground powder of fused quartz showed an anomalously high thermal expansion of 7×10-6/°C, i.e., about 10 times of that of the normal fused quartz. The density of the glass powder increased with grinding
HAMANO, Kenya, KOTOH, Makoto, ICHIBA, Keisuke, YAMAMURA, Hiroshi   +3 more
openaire   +2 more sources

Polyimide‐Linked Hexaazatriphenylene‐Based Porous Organic Polymer with Multiple Redox‐Active Sites as a High‐Capacity Organic Cathode for Lithium‐Ion Batteries

Advanced Materials, EarlyView.
A high‐capacity polyimide‐linked porous organic polymer (HAT‐PTO) incorporating numerous redox‐active centers is synthesized via a hydrothermal reaction, delivering a high theoretical capacity of 484 mAh g−1. In situ hybridization with carboxyl‐functionalized multiwalled carbon nanotubes enhances conductivity and stability, achieving 397 mAh g−1 at C ...
Arindam Mal, Jonathan Caroni, Asia Patriarchi, Olivera Luzanin, Rafael Ramos, Jan Bitenc, Manuel Melle‐Franco, Manuel Souto   +7 more
wiley   +1 more source

Exploring the synergistic effects of quartz powder and GGBS in sustainable standard strength concrete: insights from carbonation and electrochemical impedance spectroscopy (EIS)

Discover Materials
This study investigates the use of ground granulated blast-furnace slag (GGBS) and quartz powder as partial cement substitutes to lessen the carbon footprint associated with concrete production.
B. Narendra Kumar, B. Sai Sunil, Kiran Bhat P   +2 more
doaj   +1 more source

Evaluation of the Pozzolanic Activity of Metakaolin, Glass Powder and Silica Powder for Use in Cementitious Mortars

Studia Universitatis Babes-Bolyai Chemia
The objective of this study is to evaluate the pozzolanic activity of metakaolin, glass powder and silica powder for use in cementitious mortars. Thus, metakaolin was produced by calcination at 700 °C of a clay soil from Burkina composed of kaolinite ...
Issiaka SANOU, Saada ZOUNGRANA, Moussa OUEDRAOGO, Ali SANOU, Younoussa MILLOGO   +4 more
doaj   +1 more source