Results 41 to 50 of about 155,781 (300)

Reaction of quartz glass in lithium-containing alkaline solutions with or without Ca [PDF]

Royal Society Open Science, 2018
The exact role of lithium ions (Li+) in controlling alkali–silica reaction is still unclear. Thus, the effects of Li+ on the reaction between reactive silica (quartz glass) and hydroxyl in alkaline solution with or without Ca were investigated by quartz ...
Baofu Zhou, Zhongyang Mao, Min Deng
doaj   +1 more source

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

Advanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger, Anna Mauri, Yang Cui, Sebastian Josef Weishäupl, Ali Deniz Özdemir, Hamad Syed, Aleksandr Ovsianikov, Wolfgang Wenzel, Alexander Pöthig, Jürgen Hauer, Mariana Kozlowska, Roland Augustinus Fischer   +11 more
wiley   +1 more source

FORMULATION OF SELF-COMPACTING CONCRETE USING RAW MATERIALS OF THE NORTH CAUCASUS

Вестник Дагестанского государственного технического университета: Технические науки, 2016
Aim. The paper considers the issues associated with the development of formulations of self-compacting concrete.Methods. The basis of the preparation of such concrete is necessary to use effective modern modifiers that improve the rheological properties ...
S.-A. Y. Murtazaev, M. Sh. Salamanova, M. S. Hubaev   +2 more
doaj   +1 more source

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

Dissolution rate of powdered quartz in acid solution

GEOCHEMICAL JOURNAL, 1974
The study reported in this paper concerns the role of salts in dissolution of powdered quartz. Kinetic dissolution experiment was carried out in acid media at 60 and 90°C to know the mechanism of acid alteration of rocks. The dissolution rate of silicon was accelerated by addition of such salts as sodium chloride and sodium sulfate in solution above ...
Hiroshi Kamiya, Atsuko Ozaki, Masayuki Imahashi   +2 more
openaire   +2 more sources

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

Advanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner, Ruben Maile, Murat Cuvalli, Andreas Wolf, Ayisha Komal, Robert Oestreich, Christoph Janiak, Karl Mandel, Alexander Knebel, Klaus Müller‐Buschbaum   +9 more
wiley   +1 more source

Effect of Mineral Crude Materials on Physical and Chemical Properties of Mold Powder

Teshugang, 2016
The effect of quartz, wollastonite, fluorite and soda-ash on melting point, viscosity, crystallization temperature and critical cooling rate of mold powder has been studied by mold powder series (/% ：29-39 cement grog, 8 borax ,16-24 quartz, 11-19 ...
刘磊, 韩秀丽, 张玓, 邓美乐, 刘丽娜   +4 more
doaj  

Performance Study of Plain Cement Concrete Containing Quartz Powder and Eggshell Powder as Partial Replacement of Cement

International Journal of Emerging Research in Engineering, Science, and Management
Concrete remains a mainstay among construction materials despite ongoing improvements to enhance its environmental friendliness and effectiveness. This study explores the effects of adding quartz and eggshell powder to concrete.
Allu Taraka Rama Rao, Ravi Kumar, Chandra Mouli V.S.A   +2 more
doaj   +1 more source

Modified palm oil fuel ash (pofa) as quartz replacement for the production of porcelain [PDF]

, 2019
Utilization of silica rich ash such as palm oil fuel ash (POFA) in the ceramic industry due to the increasing demand for porcelain with improved performance is inevitable.
Durumin Iya, Sani Garba
core   +1 more source

Rational Fine‐Tuning of MOF Pore Metrics: Enhanced SO2 Capture and Sensing with Optimal Multi‐Site Interactions

Advanced Functional Materials, EarlyView.
A pore tuning strategy to amplify the multi‐site MOF‐SO2 interactions is proposed to achieve an enhanced trace SO2 capture and chemiresistive sensing in highly stable isostructural DMOFs by annelating benzene rings. This work provides a facile strategy to achieve tailor‐made stable MOF materials for specific multifunctional applications.
Shanghua Xing, Abdulrahman Mohabbat, István Boldog, Jens Möllmer, Marcus Lange, Yulyan Haiduk, Tobias Heinen, Vladimir Pankov, Oliver Weingart, Christoph Janiak   +9 more
wiley   +1 more source