The effect of ZnO addition on the densification and properties of magnesium aluminate spinel

Ghosh, Abhijit; Das, Swapan Kumar; Biswas, J.; Tripathi, Himanshu; Banerjee, Goutam

doi:10.1016/s0272-8842(99)00104-2

Cited by 81 publications

(27 citation statements)

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“…Attempts have been made to replace the present day consumable carbon anode used in the Hall-Heroult process with an inert anode,the cell reaction then being, (1) The corrosion resistance of NiFe 2 O 4 e-based cermets, a potential inert anode material for aluminum electrolysis, are dependent on its relative density [4][5][6] . For Conventional sintering, the densification is usually enhanceed by increasing the sintering temperature, but the samples of grain coarsening result in low mechanical properties and electric conductivity, especailly thermal shock.…”

Section: Introductionmentioning

confidence: 99%

Effect of additive BaO on corrosion resistance of xNi/10NiO-NiFe2O4 cermet inert anodes for aluminium electrolysis

He¹,

Xiao²

2012

Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology (2012)

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Abstract. xNi/10NiO-NiFe, respectively. Thus, sintering agent BaO can effectively promote the densification of xNi/10NiO-NiFe 2 O 4 cermet(x=5,10,17) inert anodes, but the addition of 1wt.% BaO(mass fraction) to xNi/10NiO-NiFe 2 O 4 cermet(x=5,10,17) inert anodes has negative effect on corrosion resistance, perhaps because additive BaO exists in the grain boundary, which accelerates the corrosion of xNi/10NiO-NiFe 2 O 4 cermet(x=5,10,17) inert anode.

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Section: Introductionmentioning

confidence: 99%

Effect of additive BaO on corrosion resistance of xNi/10NiO-NiFe2O4 cermet inert anodes for aluminium electrolysis

He¹,

Xiao²

2012

Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology (2012)

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“…[55] were reported to improve the sintered properties of magnesium aluminate spinel. On the other hand, an addition of ZnO has been reported to improve the densification, hot strength and thermal shock resistance of MA [56,24]. Also, the addition of Cr 2 O 3 has been reported to improve the thermal shock and corrosion resistance [57][58][59].…”

Section: Introductionmentioning

confidence: 99%

Sintering, mechanical and refractory properties of MA spinel prepared via co-precipitation and sol–gel techniques

Khalil

Hassan

Ewais

et al. 2010

Journal of Alloys and Compounds

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“…Sintering additive is an effective method to increase densification and electric conductivity of cermets. GHOSH et al [6] obtained relative density of 99% in magnesium aluminate spinel using ZnO as additive and suggested that the formation of anion vacancy in the presence of ZnO improves density and mechanical properties. SARKAR et al [7] observed that the densified temperature for magnesium aluminate spinel decreased by about 100 K with addition of Cr 2 O 3 up to 1% (mass fraction).…”

Section: Introductionmentioning

confidence: 99%

Effect of BaO addition on relative density and electric conductivity of xNi/10NiO-NiFe2O4 cermets

Zhou

et al. 2009

J. Cent. South Univ. Technol.

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xNi/10NiO-NiFe 2 O 4 (x=5, 10, 17) cermets and those doped with 1% BaO (mass fraction) were prepared by cold isostatic pressing at 200 MPa and sintering in nitrogen atmosphere at 1 473 K. The effects of BaO addition on relative density, microstructure and electric conductivity of cermets were investigated. The results show that relative densities of xNi/10NiO-NiFe 2 O 4 cermets (x=5, 10, 17) doped with 1% BaO at 1 473 K in nitrogen atmosphere are increased by 0.49%, 1.45% and 2.99% compared with those of the undoped BaO cermets, respectively. Moreover, the electric conductivities (21.98, 28.37 and 50.10 S/cm) of xNi/10NiO-NiFe 2 O 4 cermets (x=5, 10, 17) doped with 1% BaO at 1 233 K are improved compared with those (18.70, 22.79 and 39.58 S/cm) of xNi/10NiO-NiFe 2 O 4 cermets (x=5, 10, 17), respectively. This indicates that perhaps the addition of BaO or formation of BaFe 2 O 4 and Ba 2 Fe 2 O 5 has an active effect on electric conductivities of xNi/10NiO-NiFe 2 O 4 (x=5, 10, 17) cermets.

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The effect of ZnO addition on the densification and properties of magnesium aluminate spinel

Cited by 81 publications

References 1 publication

Effect of additive BaO on corrosion resistance of xNi/10NiO-NiFe2O4 cermet inert anodes for aluminium electrolysis

Effect of additive BaO on corrosion resistance of xNi/10NiO-NiFe2O4 cermet inert anodes for aluminium electrolysis

Sintering, mechanical and refractory properties of MA spinel prepared via co-precipitation and sol–gel techniques

Effect of BaO addition on relative density and electric conductivity of xNi/10NiO-NiFe2O4 cermets

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