braulio m a l bittencourt l r m poirier j and
All articlesJournal of Ceramic Science
The Journal of Ceramic Science and Technology publishes original scientific articles on all topics of ceramic science and technology from all ceramic branches. The focus is on the scientific exploration of the relationships between processing microstructure and properties of sintered ceramic materials as well as on new processing routes for innovative ceramic materials.
Get PriceInfluence of Air Compressibility on the Permeability
Dec 20 2004 · Air compressibility is important in attaining an accurate quantification of the permeability parameters for refractory castables. Nevertheless this effect is often neglected in the permeability equations that are found in ceramics literature.
Get PriceCreep behavior modeling of silica fume containing Al2O3
Jan 01 2012 · The three parameters presented a linear correlation with the silica fume content and as the amount of this additive scales with the maximum primary strain (θ 1) the creep rate moves towards the steady state (θ 3 θ 4).On the other hand the time required to reach this condition (considered as 3 times the inverse of the θ 2 value) decreases with the increment of silica fume in the castable
Get PriceEffect of Additives on the Hydration Resistance of
Dec 20 2004 · The effect of a variety of doping additives on the hydration resistance of calcined materials in the MgO–CaO system was investigated. Samples were prepared from lightly calcined flotation magnesite that was mixed with dolomite as well as from analytically pure CaO and MgO then the samples were doped with additives that contained cations with various valences (monvalent to
Get PriceA Comparison of Al(OH) 3 and Mg(OH) 2 as Inorganic
Castable porous ceramics combine the high refractoriness of ceramics the useful characteristics of porous materials and the straightforward installation of castable systems. In this study particles of aluminium hydroxide (Al(OH)3) and magnesium hydroxide (Mg(OH)2) of similar average size were added separately to an alumina castable (up to 67 vol.- ).
Get PriceStudy of the Possibility of Preparing Low-Cement Magnesia
Mar 30 2019 · The possibility of producing vibro- and self-flow low-cement periclase concretes is investigated. It is shown that when the concrete mixture is prepared in traditional preparation conditions the aggregate and the finely ground component based on the fused periclase are hardly hydrated the brucite content after 3 days of concrete hardening does not exceed 1 .
Get Price11th Biennial Worldwide Conference on Unified
m. a. l. braulio m. f. maria p. o. brant v. c. pandolfelli new reactivity controlled calcium aluminate technologies for luis rodolfo m. bittencourt castables and other monolithics technology/monolithics iv characterisation of alumina-magnesia castables after firing in
Get PriceAll articlesJournal of Ceramic Science
The Journal of Ceramic Science and Technology publishes original scientific articles on all topics of ceramic science and technology from all ceramic branches. The focus is on the scientific exploration of the relationships between processing microstructure and properties of sintered ceramic materials as well as on new processing routes for innovative ceramic materials.
Get PriceThe Reaction Mechanism between Aluminum-Magnesia-Spinel
4 P. T Jones J Vleugels I Volders B Blanpain O Van der Biest P Wollants Journal of the European Ceramic Society Volume 22 Issue 6 June 2002 Pages 903–916. DOI 10.1016/s(00)
Get PriceIn situ Spinel Expansion Design by Colloidal Alumina
A.G. Tomba Martinez A.P. Luz M.A.L. Braulio V.C. Pandolfelli Al2O3-based binders for corrosion resistance optimization of Al2O3–MgAl2O4 and Al2O3–MgO Luís Rodolfo M. Bittencourt Victor C. Pandolfelli Novel Features of Nanoscaled Particles Addition to Alumina–Magnesia Refractory Castables Journal of the American
Get Price11th Biennial Worldwide Vol. 1
11thBiennialWorldwide Conference onUnified InternationalTechnical ConferenceRefractories2009 (UNITECR2009) Salvador Brazil 13-16October2009 Volume1 of2 ISBN
Get PriceThermal Expansion Characteristics of Alumina–Magnesia and
The thermal expansion of Al 2 O 3 –MgO castables containing 5.5 wt MgO and 1.36 wt CaO and Al 2 O 3 –spinel castables containing 20 wt spinel having 95 wt Al 2 O 3 and 1.7 wt CaO was measured in the temperature range of 800–1650°C by dilatometry. A sharp increase in expansion from around 1425° to 1525°C followed by a sharp decrease with further increasing temperature is
Get PriceDigestive Stability Micellarization and Uptake by Caco-2
Aug 30 2008 · The digestive stability efficiency of micellarization and cellular accumulation of the chlorophyll pigments of different preparations of pea were investigated using an in vitro digestion procedure coupled with human intestinal Caco-2 cells. Fresh pea (FP) cooked fresh pea (CFP) frozen pea (FZP) cooked frozen pea (CFZP) and canned pea (CP) were subjected to simulated digestion.
Get PriceBraulio M.A.L. Bittencourt L.R.M. Poirier J. and
Braulio M.A.L. Bittencourt L.R.M. Poirier J. and Pandolfelli V.C. (2008) Microsilica Effects on Cement Bonded Alumina-Magnesia Refractory Castables. Journal of
Get PriceMagnesia grain size effect on in situ spinel refractory
Nov 01 2008 · Alumina–magnesia castables present an expansive behavior due to in situ spinel formation and the reaction is affected by the magnesia source and its grain size. In this study castables were prepared with different magnesia grain sizes (<45 or <100. μm) and the samples were evaluated by an assisted sintering technique mechanical strength creep resistance and microstructural evaluation.
Get PriceQuality of life in patients awaiting lung transplant
The symptoms associated with chronic lung disease can impair quality of life and psychosocial functioning. The purpose of the present study was to provide a thorough baseline assessment of quality of life in patients with end‐stage lung disease and being evaluated for transplant and to assess potential differences in quality of life between patients with cystic fibrosis (CF) and those with
Get PriceStudy of Spinel-Containing High Alumina Castable with
Rev. 46 (2001) 145–167 CrossRef Google Scholar Braulio M.A.L. Bittencourt L.R.M. Poirier J. Pandolfelli V.C. Microsilica effects on cement bonded alumina-magnesia refractory castables.
Get PriceCircadian Profile of Cardiac Autonomic Nervous Modulation
Josef M. Tatschl Sigurd M. Hochfellner Andreas R. Schwerdtfeger Implementing Mobile HRV Biofeedback as Adjunctive Therapy During Inpatient Psychiatric Rehabilitation Facilitates Recovery of Depressive Symptoms and Enhances Autonomic Functioning Short-Term A 1-Year Pre–Post-intervention Follow-Up Pilot Study Frontiers in Neuroscience 10
Get PriceEffect of Additives on the Hydration Resistance of
Dec 20 2004 · The effect of a variety of doping additives on the hydration resistance of calcined materials in the MgO–CaO system was investigated. Samples were prepared from lightly calcined flotation magnesite that was mixed with dolomite as well as from analytically pure CaO and MgO then the samples were doped with additives that contained cations with various valences (monvalent to
Get PriceStudy of the Possibility of Preparing Low-Cement Magnesia
Mar 30 2019 · The possibility of producing vibro- and self-flow low-cement periclase concretes is investigated. It is shown that when the concrete mixture is prepared in traditional preparation conditions the aggregate and the finely ground component based on the fused periclase are hardly hydrated the brucite content after 3 days of concrete hardening does not exceed 1 .
Get PriceThe Hydration of Magnesium Oxide from the Vapor Phase
Anoop Agrawal Hamid R Habibi Raj K Agrawal John P Cronin Dale M Roberts R Sue Caron-Popowich Carl M Lampert. Effect of deposition pressure on the microstructure and electrochromic properties of electron-beam-evaporated nickel oxide films.
Get PriceThe impact of pre-formed and in situ spinel formation on
Sep 01 2010 · Alumina–magnesia and alumina–spinel castables present some unique characteristics. Whereas the in situ spinel (MgAl 2 O 4) formation provides an enhanced corrosion and thermal-shock resistance to the castable the composition with pre-formed grains shows higher volumetric stability and do not have the inherent MgO hydration problems.As these distinct ways of spinel incorporation result
Get PriceEffect of Additives on the Hydration Resistance of
Dec 20 2004 · The effect of a variety of doping additives on the hydration resistance of calcined materials in the MgO–CaO system was investigated. Samples were prepared from lightly calcined flotation magnesite that was mixed with dolomite as well as from analytically pure CaO and MgO then the samples were doped with additives that contained cations with various valences (monvalent to
Get PriceAll articlesJournal of Ceramic Science
In-Situ Synthesis and Formation Mechanism of Al 2 O 3-Spinel(N) Composite in Nitrogen Atmosphere under Low Oxygen Partial Pressure. S. Tong 1 Y. Li 1 J. Zhao 2 M. Yan 1 Y. Hong 1 Q. Zheng 1. 1 School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China 2 Beijing Lier High-Temperature Materials Co. Ltd. Beijing 102200 China
Get PriceSynthesis and Rheological Property of Calcium Aluminate
Abstract Calcium aluminate cements with different MgAl 2 O 4 spinel (CMA) contents and particle sizes were synthesized. The results revealed that when the synthesis temperature was raised from 1400℃ to 1500℃ the particle size of MgAl 2 O 4 (MA) increased from 5 μm to 15 μm. The MA particles appeared in clusters and were distributed around the CaAl 2 O 4 /CaAl 4 O 7 (CA/CA 2) particles
Get PriceAll articlesJournal of Ceramic Science
The Journal of Ceramic Science and Technology publishes original scientific articles on all topics of ceramic science and technology from all ceramic branches. The focus is on the scientific exploration of the relationships between processing microstructure and properties of sintered ceramic materials as well as on new processing routes for innovative ceramic materials.
Get PriceThe Hydration of Magnesium Oxide from the Vapor Phase
Anoop Agrawal Hamid R Habibi Raj K Agrawal John P Cronin Dale M Roberts R Sue Caron-Popowich Carl M Lampert. Effect of deposition pressure on the microstructure and electrochromic properties of electron-beam-evaporated nickel oxide films.
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