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alumina spinel
A set of physicochemical analytical methods was applied to study fusion and crystallization of magnesia-alumina spinel, aluminum titanate, mullite, and their binary and ternary formulations.
      
Chromian spinels from the Staré Ransko gabbro-peridotite, Czech Republic, display a distinct development trend: from primary Cr-rich spinels towards ferro-ferri (Ti-enriched magnetite) and magnesio-alumina (spinel sensu stricto) spinels.
      
Effects of Al3+ ions being partially substituted by Fe3+ ions in the magnesium-alumina spinel structure on the activity of SO2 oxidative adsorption and the reductive decomposition of sulfate have been studied.
      
To develop a novel additive that has excellent olefin reduction capability for FCC gasoline without loss in octane number, different additives based on magnesia-alumina spinel were prepared by sol-gel method.
      
High temperature creep behaviour of nearly stoichiometric alumina spinel
      
The formation of an alumina spinel is observed only on the Fe-10Al alloy, whereas no iron-chromia spinel is found on the Fe-Al-Cr alloys.
      
Sintering and recrystallization of high-purity magnesia-alumina spinel during hot pressing
      
A study was made of the densification and recrystallization of magnesia - alumina spinel of high dispersion during hot pressing in the temperature range 1200-1600°C, a pressure of 60-300 cm2, and a holding time of 10-30 min.
      
Producing synthetic ceramic magnesia - Alumina spinel for roof refractories
      
Magnesia-alumina spinel and highly chromic spinel MgAl0.4Cr1.6O4 and MgCr2O4 retard the grain growth of corundum during firing of the product.
      
Making electrofused magnesia-alumina spinel for producing high-grade refractories
      
The basic technical parameters for melting and producing magnesia-alumina spinel in an electric arc furnace OKB-514 were evaluated and specified.
      
Magnesite-spinel roof products with sintered magnesia-alumina spinel in the batch
      
A batch of magnesite-spinel crown refractories was produced from bodies containing fused or ceramic magnesia-alumina spinel.
      
Obtaining fused magnesia-alumina spinel and using it to produce magnesite-spinel roof refractories
      
Refractories processed from corundum, magnesia-alumina spinel, periclase, and calcium and barium zirconates exhibit good resistance to the action of molten barium up to 1600°C in the absence of BaO.
      
Using magnesia-alumina spinel produced by the ceramic method, magnesite-spinel refractories were obtained with good physico-ceramic properties and high durability in service.
      
The systems based on magnesia-alumina spinel and aluminum titanate exhibit a hysteresis of thermal expansion which is an inherent property of Al2TiO5.
      
The presence of magnesia-alumina spinel significantly improves the thermal shock resistance of Al2TiO5.
      
Synthesis of magnesia-alumina spinel using periclase and bauxite
      
 

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