Reologia de concretos refratários na presença de diferentes tipos de aditivo e ligante hidráulico Refractory castables rheology in the presence of different sort of additive and hydraulic binders [PDF]
Cerâmica, 2007 Aditivos químicos podem ser adicionados aos concretos refratários com diferentes propósitos, como por exemplo, visando a dispersão das partículas finas da matriz por meio de mecanismos de dispersão eletrostáticos/eletroestéricos (dispersantes) e para ...
I. R. Oliveira, V. C. Pandolfelli
doaj +2 more sources
Synthesis of Niobium-Alumina Composite Aggregates and Their Application in Coarse-Grained Refractory Ceramic-Metal Castables. [PDF]
Materials (Basel), 2021 Niobium-alumina aggregate fractions with particle sizes up to 3150 µm were produced by crushing pre-synthesised fine-grained composites. Phase separation with niobium enrichment in the aggregate class 45–500 µm was revealed by XRD/Rietveld analysis.
Zienert T +8 more
europepmc +3 more sources
Studying Of The Structure Of Al2o3 – Sio2 – Cao – р2o5 System And Its Significance In The Technology Of Refractories [PDF]
, 2017 The paper shows that presence of such phases as mullite, corundum is required in order to obtain high quality refractories that are able to work effectively under the conditions of the simultaneous effects of corrosive environments, high temperatures and
Kharybina, Y. (Yulia) +1 more
core +3 more sources
Synthesis and properties of new paramagnetic hybrid bayerite from Al(0)/naphthalene dianhydride reaction [PDF]
, 2010 The reaction of Naphthalene 1,4,5,8-dianhydride (NTCDA) with elemental aluminum(0) powder is studied in an aqueous alcoholic KOH mixture to search for the NTCDA anion and dianion electron-adducts.
BERCI FILHO, Pedro +8 more
core +2 more sources
Coarse‐Grained Refractory Composite Castables Based on Alumina and Niobium [PDF]
, 2022 Niobium-alumina composite aggregates with 60 vol% metal content and with particle sizes up to 3150 μm are produced using castable technology followed by sintering, and a crushing and sieving process.
Aneziris, Christos G. +12 more
core +2 more sources
Acondicionamiento del aceite usado de cocina para la producción de bioetileno [PDF]
, 2022 Treballs Finals de Màster d'Enginyeria Química, Facultat de Química, Universitat de Barcelona. Curs: 2021-2022. Tutora: Maria Alicia Cardete GarciaThe cracker is the unit where ethylene and polyethylene, among other products, are produced.
Solé Gamell, Alejandro
core
Investigation of The Use of Calcium Naphthalene Sulfonate as A Binder in Magnesite Spinel Brick Production and Determination of Optimum Conditions [PDF]
, 2023 Refractory materials are indispensable for industries working with high temperatures. Magnesite spinel refractory bricks are used in the cement industry, and calcium lignosulfonate is used as a binder in their production.
Aşaman, Onur, Küçük, Özkan
core +1 more source
Cerâmica, 2007 Ligantes hidráulicos, como os cimentos de aluminato de cálcio e as aluminas hidratáveis, são os responsáveis pelo desenvolvimento de resistência mecânica de concretos refratários (desmoldagem) influenciando também as suas propriedades reológicas ...
I. R. Oliveira, V. C. Pandolfelli
doaj +1 more source
Cerâmica, 2007 Os cimentos de aluminatos de cálcio (CAC) são os ligantes hidráulicos mais utilizados em concretos refratários. No entanto, a presença de CaO em sua composição pode limitar seu uso em elevadas temperaturas nos sistemas Al2O3-SiO2 e Al2O3-MgO.
M. R. Ismael +3 more
doaj +1 more source
Journal of the Ceramic Society of Japan, 2006 The effects of alumina hydrates, namely boehmite gel and bayerite, formed by hydration of hydraulic alumina (HA) on the green strength and microstructure of porous alumina ceramics were studied. A boehmite gel (3-D) network was formed at an early stage of the hydration of HA in HA slurry. The HA slurry was hardened by the formation of this 3-D network.
Takaaki NAGAOKA +4 more
openaire +2 more sources