Effects of zirconium silicate and chromite addition on the microstructure and bulk density of magnesia–magnesium aluminate spinel-based refractory materials

2008 ◽  
Vol 34 (5) ◽  
pp. 1247-1252 ◽  
Author(s):  
P.G. Lampropoulou ◽  
C.G. Katagas
Keyword(s):  
Bulk Density ◽  
Magnesium Aluminate ◽  
Refractory Materials ◽  
Magnesium Aluminate Spinel ◽  
Zirconium Silicate

Sintering Mechanism of MgAl2O4-SiC Composites in Reduction Atmosphere

2012 ◽  
Vol 538-541 ◽  
pp. 2368-2371 ◽  
Author(s):  
Jun Cong Wei ◽  
Chun Hui Gao ◽  
Xiao Juan Yang ◽  
Liang Huo ◽  
Bao Zhong Zhao ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Weight Loss ◽  
Bulk Density ◽  
Apparent Porosity ◽  
Magnesium Aluminate ◽  
Carbide Powder ◽  
Magnesium Aluminate Spinel ◽  
Sintering Mechanism ◽  
Sic Composites ◽  
Silicon Carbide Powder

MgAl2O4-SiC Composites were prepared by using magnesium aluminate spinel and silicon carbide powder as starting materials and the sintering mechanism was investigated at 1600°C in reduction atmosphere. Sintered samples were analyzed using XRD, SEM and EDS. The results show that Alumina-rich spinel and SiCN are formed due to the reactions between spinel and SiC. Weight loss of samples was detected due to SiO formation and volatilization. The bulk density of samples decreases and apparent porosity increases as increasing the content of SiC.

Effects of Magnesium Aluminate Spinel on the Properties of Al2O3-SiC-C Castables for Blast Furnace Iron Trough

2012 ◽  
Vol 476-478 ◽  
pp. 467-470
Author(s):  
Jun Cong Wei ◽  
Jian Kun Huang ◽  
Chun Hui Cao ◽  
Jun Bo Tu
Keyword(s):  
Solid Solution ◽  
Blast Furnace ◽  
Physical Properties ◽  
Bulk Density ◽  
Molten Slag ◽  
Magnesium Aluminate ◽  
Magnesium Aluminate Spinel ◽  
Slag Resistance ◽  
X Ray Diffraction ◽  
X Ray

The effects of varying the additions of magnesium aluminate spinel (0, 3, 6, 9, 12 wt. %) on the physical properties and slag resistance of Al2O3-SiC-C based castables were investigated. The composition of the specimens was determined by X-Ray diffraction (XRD). The results revealed that the incorporation of appropriate amount of MgAl2O4 in Al2O3-SiC-C based castables could promote the sintering of the specimens, decrease apparent porosity, and improve bulk density and strength. The slag resistance of the castables was improved due to an increase in the viscosity of molten slag, caused by the solid solution of Fe2+ or Fe3+ ions from the molten slag in MgAl2O4. However, further addition would led to a decrease in slag resistance because much Mg2SiO4 was produced.

scholarly journals Ceramic Protective Coatings for Cordierite-Mullite Refractory Materials

2021 ◽  
Vol 15 (2) ◽  
pp. 247-253
Author(s):  
Orest Vakhula ◽  
◽  
Myron Pona ◽  
Ivan Solokha ◽  
Oksana Koziy ◽  
...  
Keyword(s):  
Magnesium Oxide ◽  
Protective Coating ◽  
Quartz Sand ◽  
Protective Coatings ◽  
Magnesium Aluminate ◽  
Refractory Materials ◽  
Magnesium Aluminate Spinel ◽  
Basic Composition ◽  
Mullite Refractory

The issue of cordierite-mullite refractories protection from the influence of aggressive factors is considered. The interaction between the components of protective coatings has been studied. It has been investigated that in the systems based on poly(methylphenylsiloxane) filled with magnesium oxide, alumina and quartz sand, the synthesis of cordierite (2MgO•2Al2O3•5SiO2), mullite (3Al2O3•2SiO2) or magnesium aluminate spinel (MgO•Al2O3) is possible. The basic composition of the protective coating, which can be recommended for the protection of cordierite-mullite refractory, is proposed.

scholarly journals Synthesis and characterization of a new ZIF-67@MgAl2O4 nanocomposite and its adsorption behaviour

RSC Advances ◽  
2021 ◽  
Vol 11 (22) ◽  
pp. 13245-13255
Author(s):  
Mehdi Davoodi ◽  
Fatemeh Davar ◽  
Mohammad R. Rezayat ◽  
Mohammad T. Jafari ◽  
Mehdi Bazarganipour ◽  
...  
Keyword(s):  
Room Temperature ◽  
Magnesium Aluminate ◽  
Synthesis And Characterization ◽  
Magnesium Aluminate Spinel ◽  
Adsorption Behaviour ◽  
Zeolitic Imidazolate Framework ◽  
Simple Method

New nanocomposite of zeolitic imidazolate framework-67@magnesium aluminate spinel (ZIF-67@MgAl2O4) has been fabricated by a simple method at room temperature with different weight ratios.

scholarly journals Optical glass-ceramics based on nanosized crystals of magnesium aluminate spinel doped with iron ions

2020 ◽  
Vol 1697 ◽  
pp. 012156
Author(s):  
V Bukina ◽  
O Dymshits ◽  
I Alekseeva ◽  
M Tsenter ◽  
S Zapalova ◽  
...  
Keyword(s):  
Optical Glass ◽  
Glass Ceramics ◽  
Magnesium Aluminate ◽  
Magnesium Aluminate Spinel ◽  
Iron Ions ◽  
Nanosized Crystals

Transparency of zirconia and magnesium aluminate spinel ceramics manufactured by SPS technique

Ifost ◽  
2013 ◽  
Author(s):  
Khasanov Oleg ◽  
Dvilis Edgar ◽  
Kachaev Artem ◽  
Khasanov Alexey ◽  
Polisadova Elena
Keyword(s):  
Magnesium Aluminate ◽  
Magnesium Aluminate Spinel

Flash-sintering of magnesium aluminate spinel (MgAl2O4) ceramics

2016 ◽  
Vol 100 (2) ◽  
pp. 554-562 ◽  
Author(s):  
Hidehiro Yoshida ◽  
Papiya Biswas ◽  
Roy Johnson ◽  
Mantravadi Krishna Mohan
Keyword(s):  
Magnesium Aluminate ◽  
Magnesium Aluminate Spinel ◽  
Flash Sintering ◽  
Spinel Mgal2o4

scholarly journals Influence of mechanical activation of AL2O3 on synthesis of magnesium aluminate spinel

2004 ◽  
Vol 36 (2) ◽  
pp. 73-79 ◽  
Author(s):  
Zhang Zhihui ◽  
LI. Nan
Keyword(s):  
Grain Size ◽  
Mechanical Activation ◽  
Bulk Density ◽  
Milling Time ◽  
High Energy ◽  
Magnesium Aluminate ◽  
Reaction Sintering ◽  
Air Atmosphere ◽  
Energy Ball ◽  
Analytical Reagent

Magnesium aluminate (MA) spinel is synthesized by reaction sintering from alumina and magnesia. The effects of mechanical activation of Al2O3 on reaction sintering were investigated. Non-milled a - Al2O3 and a - Al2O3 high-energy ball milled for 12h, 24h and 36h were mixed with a MgO analytical reagent according to the stoichiometric MA ratio, respectively and pressed into billets with diameters of 20mm and height of 15mm. The green-body billets were then sintered at high temperature in an air atmosphere. The results show that bulk density, relative content of MA and grain size of MA increase with increasing high-energy ball milling time of Al2O3. However prolonged milling time over 24h has a small beneficial effect on the densification of MA. Bulk density and grain size of a sample of a- Al2O3 milled for 24h are 3.30g/cm3 and 4-5 mm, respectively.

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