Densification behavior and properties of alumina–chrome ceramics: Effect of TiO2

Nath, Mithun; Sen, Sandipan; Banerjee, Kalyan; Ghosh, Arup; Tripathi, Himanshu

doi:10.1016/j.ceramint.2012.06.013

Cited by 36 publications

(15 citation statements)

References 13 publications

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“…The peak positions of the sintered materials are intermediate between the corresponding standard eskolaite and corundum. This observation indicates the formation of complete solid solution in both the cases . The lattice parameters of Al 2 O 3 –Cr 2 O 3 solid solution phase are also very similar for both the samples.…”

supporting

confidence: 59%

“…Densification was interpreted from linear shrinkage of the samples on firing from green stage, bulk density, and apparent porosity of the sintered materials. The sintering was carried out in reducing condition throughout the study, because sintering of alumina–chrome in reducing condition always exhibit higher densification compared with sintering in oxidizing condition . Variation of linear shrinkage with sintering temperature is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…It is well known that in any type of refractory system fabrication, variation of processing parameters, such as milling/grinding time of starting materials, fabrication techniques, sintering atmosphere, have great effect on the properties of the sintered materials . In this study, all the processing parameters were kept constant to investigate the effect of two different aluminas namely hydrated alumina and calcined alumina on the densification of alumina–chrome refractory system.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Alumina Reactivity on the Densification and Properties of Al₂O₃–Cr₂O₃ Refractories

Nath

Reddy

Sinhamahapatra

et al. 2014

Int J Applied Ceramic Tech

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Alumina‐chrome (Al2O3–Cr2O3) refractories with Al2O3:Cr2O3 molar ratio 1:1 were synthesized in the temperature range of 1400–1700°C by conventional solid–oxide reaction route. The effect of different aluminas (viz., hydrated and calcined) on the densification, microstructure, and properties of Al2O3–Cr2O3 refractories was investigated without changing the Cr2O3 source. The starting materials were analyzed to determine the chemical composition, mineralogy, density, surface area, and particle size. Sintered materials were characterized in terms of densification, phase assemblage, and mechanical strength at room temperature and at higher temperatures. Microstructural evolution at different sintering temperature was correlated with sintering characteristics. It can be concluded that the Al2O3–Cr2O3 refractories prepared with hydrated alumina as Al2O3 source show better densification and hot mechanical strength than corresponding calcined variety.

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supporting

confidence: 59%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Alumina Reactivity on the Densification and Properties of Al₂O₃–Cr₂O₃ Refractories

Nath

Reddy

Sinhamahapatra

et al. 2014

Int J Applied Ceramic Tech

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“…Fine powder mixtures were compacted by cold isostatic pressing and fired in the temperature range of 1000e1600 C (heating rate was maintained at 3 C/min) with 2 h soaking at peak temperature (i.e. 1600 C) [42,43].…”

Section: Preparation Of Refractory Couponsmentioning

confidence: 99%

Study on fused/cast AZS refractories for deployment in vitrification of radioactive waste effluents

Sengupta

Mishra

Soudamini

et al. 2015

Journal of Nuclear Materials

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“…Numerous investigations were carried out to develop alumina‐chrome system by several researchers applying different methods of preparation altering variable parameters. It has been found that furnace atmosphere of reducing condition and addition of additives (TiO 2 ) accelerates the densification process of alumina‐chrome refractory .…”

Section: Introductionmentioning

confidence: 99%

Hot corrosion behavior of slip‐cast alumina‐chrome refractory crucible against molten glass

Nath

Dana

Gupta

et al. 2013

Materials & Corrosion

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Alumina-chrome bodies were prepared by slip casting route. Slip casted bodies were sintered in the temperature range of 1550-1650 8C in reducing atmosphere with 2 h soaking time at peak temperature. Highly dense aluminachrome body with bulk density 4.24 g/cc and almost zero apparent porosity were obtained at 1650 8C. The hot corrosion test of alumina-chrome crucible against borosilicate glass was carried out in static condition at 1200 8C for 4 h. The study of the glass-refractory interface after static corrosion test was done by scanning electron microscopy, energy dispersive X-ray spectroscopy analysis and X-ray diffraction (XRD) analysis. The XRD pattern of glass-refractory interface does not show formation of any new phases. Elemental mapping of glass-refractory interface indicates corrosion up to a depth of 70 mm has taken place in the form of ion migration. 742

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Densification behavior and properties of alumina–chrome ceramics: Effect of TiO2

Cited by 36 publications

References 13 publications

Effect of Alumina Reactivity on the Densification and Properties of Al₂O₃–Cr₂O₃ Refractories

Effect of Alumina Reactivity on the Densification and Properties of Al₂O₃–Cr₂O₃ Refractories

Study on fused/cast AZS refractories for deployment in vitrification of radioactive waste effluents

Hot corrosion behavior of slip‐cast alumina‐chrome refractory crucible against molten glass

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Densification behavior and properties of alumina–chrome ceramics: Effect of TiO2

Cited by 36 publications

References 13 publications

Effect of Alumina Reactivity on the Densification and Properties of Al2O3–Cr2O3 Refractories

Effect of Alumina Reactivity on the Densification and Properties of Al2O3–Cr2O3 Refractories

Study on fused/cast AZS refractories for deployment in vitrification of radioactive waste effluents

Hot corrosion behavior of slip‐cast alumina‐chrome refractory crucible against molten glass

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Product

Resources

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Effect of Alumina Reactivity on the Densification and Properties of Al₂O₃–Cr₂O₃ Refractories

Effect of Alumina Reactivity on the Densification and Properties of Al₂O₃–Cr₂O₃ Refractories