Results 21 to 30 of about 2,034 (287)

Crack-free caustic magnesia-bonded refractory castables [PDF]

Ceramics International, 2021
A growing interest in designing high-alumina MgO-bonded refractory castables has been identified in recent years due to the magnesia ability to react: (i) with water at the initial processing stages of these materials (inducing the precipitation of brucite phase) or (ii) with alumina, giving rise to in situ MgAl2O4 generation at high temperatures ...
Miguel, V. C., Fini, D. S., Pinto, V. S., Moreira, M. H., Pandolfelli, V. C., Luz, A. P.   +5 more
openaire   +2 more sources

Mullite macro-needles for reinforcement of refractory castables

Cerâmica, 2022
Ceramic macro-needles incorporation as reinforcement in commercial refractory castable was studied. Ceramic macro-needles (Ø2x20 mm) were made from kaolinite clay and gibbsite to obtain mullite as the main crystalline phase.
A. Mocciaro, A. Cimas, N. M. Rendtorff, A. N. Scian   +3 more
doaj   +1 more source

Effect of Specimen Size on the Resistance to Thermal Shock of Refractory Castables Containing Eutectic Aggregates [PDF]

Materials Research, 2015
Thermal shock is one of the most severe conditions to which a refractory lining can be subjected to during its industrial application. Thus, there are several methods available for testing thermal shock damage resistance of refractories.
Dan Yushin Miyaji, Caio Zuccolotto Otofuji, Antonio Henrique Alves Pereira, José de Anchieta Rodrigues   +3 more
doaj   +2 more sources

Variação do tamanho de grão da magnésia: um exemplo da complexidade de cerâmicas refratária Changing the magnesia grain size: an example of refractory ceramics complexity

Cerâmica, 2010
Concretos refratários alumina-magnésia apresentam um comportamento expansivo devido à espinelização in-situ, sendo que a fonte de magnésia e o seu tamanho de grão influenciam tal reação.
M. A. L. Braulio, D. H. Milanez, E. Y. Sako, L. R. M. Bittencourt, V. C. Pandolfelli   +4 more
doaj   +1 more source

The Effect of Deflocculants on the Structure and Physical-Mechanical Properties of Fireclay Refractory Castables

Medžiagotyra, 2012
For production of fireclay refractory castables, various deflocculants are used. In recent years new polycarboxylate ethers-based deflocculants appeared and so far their properties comparing to those of common deflocculants are little investigated.
Ina PUNDIENĖ, Valentin ANTONOVIČ, Rimvydas STONYS, Marius ALEKNEVIČIUS, Irina DEMIDOVA-BUIZINIENĖ, Albinas GAILIUS   +5 more
doaj   +1 more source

Analysis of the Structure and Durability of Refractory Castables Impregnated with Sodium Silicate Glass

Ceramics, 2023
This study examines the impact of the impregnation of fireclay-based conventional (CC) and medium-cement castables (MCCs) with liquid sodium silicate glass under vacuum conditions.
Jurgita Malaiškienė, Valentin Antonovič, Renata Boris, Andrius Kudžma, Rimvydas Stonys   +4 more
doaj   +1 more source

Perfil de permeabilidade em concretos refratários Permeability gradient in refractory castables

Cerâmica, 2001
A durabilidade de um concreto refratário está diretamente associada à facilidade com que gases e líquidos corrosivos penetram em sua estrutura porosa.
M. D. M. Innocentini, A. R. Studart, R. G. Pileggi, V. C. Pandolfelli   +3 more
doaj   +1 more source

Mechanochemically synthesized high alumina cement and their implementation as low cement castables with some micro-fine additives

Journal of Asian Ceramic Societies, 2015
High-energy ball milling viz. mechanochemical process is being utilized to mechanically activate ceramic powders for low temperature solid state reactions. The process can help to select low-cost commercially available oxides and can produce powders with
Vijay Kumar, Vinay Kumar Singh, Abhinav Srivastava, P. Hemanth Kumar   +3 more
doaj   +1 more source

Effect of Prewetting Cenospheres on Hydration Kinetics, Microstructure, and Mechanical Properties of Refractory Castables

Crystals
This study investigated the effect of non-prewetted and prewetted cenospheres (CSs) on the hydration course and physical and mechanical properties of refractory castable mixtures incorporated with nano silica (NS). The fixed amount of 0.1% of NS improves
Ina Pundienė, Jolanta Pranckevičienė
doaj   +1 more source

Evolution of an alumina-magnesia/self-forming spinel castable. Part I: Microstructural features Evolução de um refratário de espinélio auto-formado de alumina-magnésia. Parte I: Aspectos microestruturais

Cerâmica, 1999
Refractories containing magnesium aluminate spinel (MgAl2O4) are materials for emerging technology in several applications like cement and steelmaking processes.
D. Gutiérrez-Campos, J. I. Diaz, R. M. Rodriguez   +2 more
doaj   +1 more source