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

Low cost foam-gelcasting preparation and characterization of porous magnesium aluminate spinel (MgAl2O4) ceramics

2016 ◽  
Vol 42 (16) ◽  
pp. 18215-18222 ◽  
Author(s):  
Xiangong Deng ◽  
Junkai Wang ◽  
Jianghao Liu ◽  
Haijun Zhang ◽  
Lei Han ◽  
...  
Keyword(s):  
Low Cost ◽  
Magnesium Aluminate ◽  
Magnesium Aluminate Spinel ◽  
Porous Magnesium ◽  
Spinel Mgal2o4

A wet-chemical process yielding reactive magnesium aluminate spinel (MgAl2O4) powder

2001 ◽  
Vol 27 (4) ◽  
pp. 481-489 ◽  
Author(s):  
Ji-Guang Li ◽  
Takayasu Ikegami ◽  
Jong-Heun Lee ◽  
Toshiyuki Mori ◽  
Yoshiyuki Yajima
Keyword(s):  
Chemical Process ◽  
Magnesium Aluminate ◽  
Magnesium Aluminate Spinel ◽  
Wet Chemical ◽  
Spinel Mgal2o4

scholarly journals THE EFFECT OF Mg-Al Wt% FOR PHASE FORMATION OF SPINEL MgAl2O4 PRODUCED BY METAL DISSOLVED METHOD

2020 ◽  
Vol 12 (1) ◽  
pp. 21
Author(s):  
Chairatul Umamah ◽  
Suminar Pratapa ◽  
Herman Jufri Andi
Keyword(s):  
Raw Materials ◽  
Relative Weight ◽  
Weight Fraction ◽  
Magnesium Aluminate ◽  
Magnesium Aluminate Spinel ◽  
Qualitative And Quantitative ◽  
Mixing Method ◽  
Quantitative Analyses ◽  
Spinel Mgal2o4 ◽  
Spinel Powder

<p class="Abstract">Synthesis of magnesium aluminate spinel powder (MgAl<sub>2</sub>O<sub>4</sub>, abbreviated as MA) were prepared by the liquid mixing method. The synthesis of MA involved Mg powders with various weight compositions (4.8; 10; 20; 30; 40; and 60%) and Al powders (95.2; 90; 80; 70; 60 and 40%) as the raw materials, which were independently dissolved in 37% HCl to form MgCl<sub>2</sub> and AlCl<sub>3</sub> solutions. Both solutions were then mixed and stirred for 5 hours and dried to a temperature of about 100-105°C to produce powders with different weight compositions. Each powder resulted from drying was characterized using DTA-TGA, and then calcined at 650 °C; 750 °C and 850 °C for 1 hour. The calcined powder was characterized by XRD to qualitative and quantitative analyses using Rietica. It was found that MA samples contained only MgAl<sub>2</sub>O<sub>4</sub> and MgO as the impurity phase. The relative weight fraction of MgAl<sub>2</sub>O<sub>4</sub> increased up to 99% for 95.2 wt% Al. Using an extrapolative approach to determine the Mg-to-Al composition, nearly pure MA, as high as 99%, was achieved at 95.2% Al and 4.8% Mg.</p>

scholarly journals Evolution of an alumina-magnesia/self-forming spinel castable. Part I: Microstructural features

Cerâmica ◽  
1999 ◽  
Vol 45 (292-293) ◽  
pp. 93-98 ◽  
Author(s):  
D. Gutiérrez-Campos ◽  
J. I. Diaz ◽  
R. M. Rodriguez
Keyword(s):  
Crystal Growth ◽  
Firing Temperature ◽  
Emerging Technology ◽  
Sem Analysis ◽  
Magnesium Aluminate ◽  
Magnesium Aluminate Spinel ◽  
Microstructural Characteristics ◽  
Spinel Formation ◽  
Several Variables ◽  
Spinel Mgal2o4

Refractories containing magnesium aluminate spinel (MgAl2O4) are materials for emerging technology in several applications like cement and steelmaking processes. In order to deep the understanding of these castables, this work presents the microstructural characteristics of an alumina-magnesia/self-forming spinel castable. Several variables such as MgO content, firing temperature and spinel formation are analyzed through XRD and SEM analysis. The results showed that the processes of spinel formation and nucleation are not strongly affected by the MgO content, but that the crystal growth is enhanced for samples with 6.0 wt% MgO. Hibonite (CA6) bonding in the castable matrix showed a needlelike structure that could increase hot properties of the material. MgO content in the castable seems to affect the hibonite development. The development of a self-forming spinel castable without any synthetic spinel grains appears to be promissory for optimum refractory linings.

Dynamical simulations of radiation damage in magnesium aluminate spinel, MgAl2O4

2005 ◽  
Vol 17 (6) ◽  
pp. 875-891 ◽  
Author(s):  
R Smith ◽  
D Bacorisen ◽  
B P Uberuaga ◽  
K E Sickafus ◽  
J A Ball ◽  
...  
Keyword(s):  
Radiation Damage ◽  
Magnesium Aluminate ◽  
Magnesium Aluminate Spinel ◽  
Dynamical Simulations ◽  
Spinel Mgal2o4
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