Spinel phase in the system MgOFe2OAl2O3

Kwestroo, W.

doi:10.1016/0022-1902(59)80012-9

Cited by 26 publications

(11 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite excess magnesia does not enlarge unit cell of spinel, yet shifting of spinel peaks to lower 2θ was seen in C. Although solid solution of cubic forsterite (0.8069 nm) should reduce lattice constant of spinel (0.8083 nm), it has not been experimentally observed . The expansion of spinel unit cell in C could be explained by solid solution of spinel with magnesioferrite (0.8387 nm) or hercynite (0.8153 nm), the former being more likely.…”

Section: Resultsmentioning

confidence: 90%

“…At 1600°C, spinel can dissolve 0.2% CaO . However, FeO has complete solubility in spinel at 1023°C and up to 13.5 mol% Fe 2 O 3 can be incorporated in spinel at 1400°C . Hence it is possible that most impurities existed as solid solution within spinel in B.…”

Section: Resultsmentioning

confidence: 99%

“…37 However, FeO has complete solubility in spinel at 1023°C 38 and up to 13.5 mol% Fe 2 O 3 can be incorporated in spinel at 1400°C. 39 Hence it is possible that most impurities existed as solid solution within spinel in B. Composition C (n=0.504) sintered at 1600°C consisted of spinel, periclase (ICDD PDF 45-0946) and the low melting phase monticellite (ICDD PDF 75-1569).…”

Section: Raw Materials Characteristicsmentioning

confidence: 99%

See 2 more Smart Citations

Microstructure and phase evolution of Indian magnesite‐derived MgAl₂O₄ as a function of stoichiometry and ZrO₂ doping

Mandal

Mondal

Das

2017

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

To aid development of cost-effective sintered spinel as a refractory raw material, this paper presents an extensive analysis of microstructure and complex phase evolution of Al-rich, Mg-rich, and stoichiometric spinel aggregates derived from Indian magnesite and calcined alumina. Pore morphology in Al-rich spinel was transformed upon sintering at 1650°C and corundum laths embedded in porous Al-rich spinel matrix was formed. Stoichiometric spinel sintered at 1600°C consisted of mostly direct bonded angular equiaxed spinel grains which incorporated the impurities in solid solution. Mg-rich spinel was composed of spinel grains with reduced angularity along with intergranular amorphous phase, small round monticellite grains, and periclase. EDS line scan revealed impurity-free joins existed between direct bonded spinel grains. Mg-rich spinel containing 0.65 wt% ZrO 2 formed cubic ZrO 2 -CaO-MgO solid solution located along spinel boundaries, which reduced both intergranular amorphous phase and monticellite. This increased SiO 2 and MgO content in spinel solid solution triggering exsolution of metastable cubic forsterite manifested as split spinel peaks in XRD pattern. A 14.7% reduction in slag penetration was exhibited upon doping Mg-rich spinel with 0.21% ZrO 2 . Stoichiometric and Mg-rich spinels attained 0.35% and 0.54% apparent porosity at 1600°C, which is better than most commercial sintered refractory spinels. K E Y W O R D S

show abstract

Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Raw Materials Characteristicsmentioning

confidence: 99%

See 1 more Smart Citation

Microstructure and phase evolution of Indian magnesite‐derived MgAl₂O₄ as a function of stoichiometry and ZrO₂ doping

Mandal

Mondal

Das

2017

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

show abstract

“…The MgO‐FeO phase diagram 58 shows complete solid solubility of FeO in MgO, and the melting point decreases with such substitution. Both FeO and Fe 2 O 3 have a significant solubility in spinel 35,59,60 . If Fe is taken up in the MgO solid solution, the viscosity of the infiltrating slag might increase, reducing its penetration into the refractory.…”

Section: Discussionmentioning

confidence: 99%

“…Both FeO and Fe 2 O 3 have a significant solubility in spinel. 35,59,60 If Fe is taken up in the MgO solid solution, the viscosity of the infiltrating slag might increase, reducing its penetration into the refractory. The elemental map of Fe in SP ( Figure 19) shows significant penetration in case of spinel matrix and sintered MgO except for fused MgO.…”

Section: Spinelmentioning

confidence: 99%

Designing environment‐friendly chromium‐free Spinel‐Periclase‐Zirconia refractories for Ruhrstahl Heraeus degasser

Mandal

Kumar²,

Kumar

et al. 2020

J Am Ceram Soc

View full text Add to dashboard Cite

The Ruhrstahl Heraeus (RH) degasser (Figure 1) is the globally preferred equipment to manufacture high quality vacuum treated steel purified to ppm level of C, H, and N. 1-3 Examples of such steel are ultra-low carbon steel (<30 ppm C) for lightweight automobile applications, high carbon manganese steel (<1.5 ppm H 2 , <40 ppm N 2) for crack resistant railway tracks and electrical steel for transformer cores. Faster operation and the ability to perform gas removal, decarburization, desulphurization, and alloy addition with precise composition control makes RH degassers superior to other metallurgical equipment like the vacuum arc degasser. This paper explores refractories for use in a RH degasser which is used to manufacture steel consumed primarily by the automotive industry, one of the world's largest industries in terms of revenue. The automotive steel market is worth US$

show abstract

Bibliographie Néerlandaise

1959

Recl. Trav. Chim. Pays‐Bas

View full text Add to dashboard Cite

Spinel phase in the system MgOFe2OAl2O3

Cited by 26 publications

References 10 publications

Microstructure and phase evolution of Indian magnesite‐derived MgAl₂O₄ as a function of stoichiometry and ZrO₂ doping

Microstructure and phase evolution of Indian magnesite‐derived MgAl₂O₄ as a function of stoichiometry and ZrO₂ doping

Designing environment‐friendly chromium‐free Spinel‐Periclase‐Zirconia refractories for Ruhrstahl Heraeus degasser

Bibliographie Néerlandaise

Contact Info

Product

Resources

About

Spinel phase in the system MgOFe2OAl2O3

Cited by 26 publications

References 10 publications

Microstructure and phase evolution of Indian magnesite‐derived MgAl2O4 as a function of stoichiometry and ZrO2 doping

Microstructure and phase evolution of Indian magnesite‐derived MgAl2O4 as a function of stoichiometry and ZrO2 doping

Designing environment‐friendly chromium‐free Spinel‐Periclase‐Zirconia refractories for Ruhrstahl Heraeus degasser

Bibliographie Néerlandaise

Contact Info

Product

Resources

About

Microstructure and phase evolution of Indian magnesite‐derived MgAl₂O₄ as a function of stoichiometry and ZrO₂ doping

Microstructure and phase evolution of Indian magnesite‐derived MgAl₂O₄ as a function of stoichiometry and ZrO₂ doping