Sintering Behavior of Highly Porous Ceramic Materials Based on the Al2O3–MgO System

Бучилин, Н. В.; Basargin, O. V.; Varrik, N. M.; Lugovoi, A. A.

doi:10.1134/s0020168520040032

Cited by 6 publications

(1 citation statement)

References 15 publications

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“…Usually, the microporous MgO-Al 2 O 3 refractory aggregates are manufactured via crushing and screening porous MgO-Al 2 O 3 ceramics. The prepared methods of porous MgO-Al 2 O 3 ceramics includes the foaming-gelcasting method, 25,26 the template method 27,28 and the in situ decomposition synthesis method, [29][30][31][32] and so on. For example, porous MgAl 2 O 4 ceramics with a porosity of 75.1% and an average pore size of 266 μm were fabricated by the foaming-gelcasting method.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and properties of microporous MgO–Al₂O₃ refractory aggregates from Mg(OH)₂ and Al(OH)₃

Yan,

Wang

et al. 2023

Int J Applied Ceramic Tech

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In this work, microporous MgO–Al2O3 refractory aggregates were prepared with Mg(OH)2 and Al(OH)3 via the in situ decomposition synthesis method. The effect of Al(OH)3 addition on the microstructure and properties of microporous MgO–Al2O3 refractory aggregates was investigated with scanning electron microscope and mercury intrusion porosimetry. The results indicated that the improved green density of the samples and the reaction sintering accelerated the mass transport rate with adding Al(OH)3 from 0 to 4.0 wt%. Besides, a small amount of Al3+ diffused into porous MgO particles, accelerating the merging and growth of nanopores in the porous MgO particles. The intra‐particle pore size and the densification degree of microparticles were increased, and thus the strength of the samples was improved. Due to the formation of Kirkendall voids by interdiffusion of Mg2+ and Al3+, the inter‐particle pore size increased. Adding Al(OH)3 from 4.0 to 17.6 wt%, the Kirkendall voids weakened the mass transport rate and improved the inter‐particle pore size. The merging and growth of nanopores in the MgO particles were limited, resulting in the reduced intra‐particle pore size and increased intra‐particle pore number. The densification degree of microparticles was reduced, and thus the strength of the samples decreased. At the Al(OH)3 addition of 4.0 wt%, microporous MgO–Al2O3 refractory aggregates had the best comprehensive properties, a bulk density of 2.48 g/cm3, an apparent porosity of 29.4%, a median pore size of 1.6 μm with 42.2 vol% nanopores and the thermal conductivity of 4.0 W/(m K).

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Section: Introductionmentioning

confidence: 99%

Microstructure and properties of microporous MgO–Al₂O₃ refractory aggregates from Mg(OH)₂ and Al(OH)₃

Yan,

Wang

et al. 2023

Int J Applied Ceramic Tech

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State-of-the-art developments in fabricating ceramic membranes with low energy consumption

Zou

Fan

2021

Ceramics International

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A strategy for controlling microstructure and mechanical properties of microporous spinel (MgAl2O4) aggregates from magnesite and Al(OH)3

Yan

Chen

et al. 2022

Journal of Alloys and Compounds

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Sintering Behavior of Highly Porous Ceramic Materials Based on the Al2O3–MgO System

Cited by 6 publications

References 15 publications

Microstructure and properties of microporous MgO–Al₂O₃ refractory aggregates from Mg(OH)₂ and Al(OH)₃

Microstructure and properties of microporous MgO–Al₂O₃ refractory aggregates from Mg(OH)₂ and Al(OH)₃

State-of-the-art developments in fabricating ceramic membranes with low energy consumption

A strategy for controlling microstructure and mechanical properties of microporous spinel (MgAl2O4) aggregates from magnesite and Al(OH)3

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Sintering Behavior of Highly Porous Ceramic Materials Based on the Al2O3–MgO System

Cited by 6 publications

References 15 publications

Microstructure and properties of microporous MgO–Al2O3 refractory aggregates from Mg(OH)2 and Al(OH)3

Microstructure and properties of microporous MgO–Al2O3 refractory aggregates from Mg(OH)2 and Al(OH)3

State-of-the-art developments in fabricating ceramic membranes with low energy consumption

A strategy for controlling microstructure and mechanical properties of microporous spinel (MgAl2O4) aggregates from magnesite and Al(OH)3

Contact Info

Product

Resources

About

Microstructure and properties of microporous MgO–Al₂O₃ refractory aggregates from Mg(OH)₂ and Al(OH)₃

Microstructure and properties of microporous MgO–Al₂O₃ refractory aggregates from Mg(OH)₂ and Al(OH)₃