Results 31 to 40 of about 1,104 (303)

Influência de aditivos dispersantes nas propriedades de concretos refratários de Al2O3 e Al2O3-MgO Influence of dispersants in Al2O3 and Al2O3-MgO refractory castables

Cerâmica, 2004
O estado de dispersão das partículas constituintes da matriz de concretos apresenta uma influência direta no comportamento reológico desses materiais, determinando as técnicas que podem ser usadas para a sua aplicação.
I. R. de Oliveira, A. R. Studart, M. Innocentini, L. A. Nascimento, V. C. Pandolfelli   +4 more
doaj   +1 more source

The effect of microsilica and refractory cement content on the properties of andalusite based Low Cement Castables used in aluminum casthouse O efeito do teor de microsílica e de cimento refratário nas propriedades de LCCs usados em moldagem de alumínio

Cerâmica, 2010
The bonding system in low cement castables is achieved by the use of calcium aluminate cement, microsilica and reactive alumina. The lime/silica ratio critically impacts the liquid phase formation at high temperatures and subsequently the corrosion ...
E. A. Firoozjaei, A. Saidi, A. Monshi, P. Koshy   +3 more
doaj   +1 more source

Investigation of the role of impurities typical in secondary raw materials on the behaviour of high alumina castables - Part II: Influence on thermomechanical behaviour

Open Ceramics, 2023
The present work investigated the effect of relatively small additions of impurities originating in secondary raw materials on the thermomechanical properties of alumina castables bonded with active alumina.
Jacek Podwórny, Karolina Dudek, Magdalena Kujawa, Robert Kusiorowski, Erwan Brochen, Christian Dannert, Olaf Krause, Laura Erbar, Katharina Sarnow   +8 more
doaj   +1 more source

Zirconia Reinforcement of Cement Free Alumina Refractory Castables by Two Routes [PDF]

, 2012
The cement free castables (CFC) and the ultra low cement castables (ULCC) differ from the conventional castables not only in the fact that alumina cement content and that the water required for elaboration is considerable lower, but also that they ...
Scian, A.N., Aglietti, E.F., Rendtorff, N.M., Hipedinger, N.E.   +3 more
core   +2 more sources

Carbon Containing Castables and More

, 2010
In terms of this work formulations of carbon bonded castables based on new binder approaches and nanoadditions will be demonstrated. The new binder system allows the manufacturing of water based magnesia carbon castables with the same properties and ...
Christos G. Aneziris, Steffen Dudczig
core   +1 more source

Reasons for crack propagation and strength loss in refractory castables based on changes in their chemical compositions and micromorphologies with heating: special focus on the large blocks

Journal of Asian Ceramic Societies, 2019
Among the most significant problems in industrial refractory manufacture, especially of monolithic refractories, are the formation of cracks and loss of strength in green bodies or during heating of the refractory castables.
Nader Kazemi
doaj   +1 more source

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

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   +1 more source

Phase Transformations and Properties Evolution of Alumina-Based Refractory Castables Containing ZnO and SiO2

Materials Research, 2022
Although most of the studies presented in the literature are focused on MgAl2O4 formation and its role on alumina-based refractories performance, ZnO has been reported as a promising spinel inducer. Aiming to investigate the influence of ZnAl2O4 (ZA) and
D. S. Fini, C. L. C. de Mauro, B. P. Bezerra, A. P. Luza   +3 more
doaj   +1 more source

Selection of suitable Deflocculants for Microsilica-Containing ultra low-cement Al2O3–SiC castables [PDF]

Fanāvarī-i āmūzish, 2008
In this research, the effect of seven deflocculants including sodium tripolyphosphate, sodium hexametaphosphate, RHEOBUILD, DARVAN 811D, GLENIUM and CASTAMENT FS20, on rheology behavior of Microsilica-Containing ultra low-cement Al2O3–SiC ...
A.R. Abbasian, M.H. Amin, M.R. Rahimipour   +2 more
doaj   +1 more source

Agentes ligantes e seus efeitos em concretos refratários alumina-magnésia Binders and their effects on alumina-magnesia refratory castables

Cerâmica, 2010
Concretos refratários alumina-magnésia são comumente ligados por cimentos de aluminato de cálcio. Estes materiais apresentam, em temperaturas elevadas, uma reação de caráter expansivo decorrente da espinelização in-situ (MgAl2O4).
M. A. L. Braulio, D. H. Milanez, E. Y. Sako, L. R. M. Bittencourt, V. C. Pandolfelli   +4 more
doaj   +1 more source