Mullitization, microstructure and physical properties of mechanically activated andalusite sintered by microwave

Abdi, M.S.; Ebadzadeh, Touradj

doi:10.1016/j.ceramint.2012.07.088

Cited by 13 publications

(3 citation statements)

References 11 publications

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“…The effect of milling on andalusite is the reduction in particle size, shape changes, and loss of crystallinity. It can be assumed that in milled samples milling energy consumes for partial dissociation of andaludite …”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, it has also been reported that the mullitization of andalusite is accompanied by the presence of high purity. Particle size, sintering process, the origin of the andalusite deposit, chemical composition, mixture homogeneity, type and amount of impurities, and the properties of the liquid phase are the factors affecting the mullitization . It can be concluded that there is a complex competition between the densification and porosity formation during sintering that is strongly dependent on temperature.…”

Section: Resultsmentioning

confidence: 99%

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Phase Evolution, Microstructure, and Mechanical Properties of Alumina–Mullite–Zirconia Composites Prepared by Iranian Andalusite

Majidian

Nikzad

Eslami-shahed

et al. 2016

Int J Applied Ceramic Tech

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This paper investigates the effects of Iranian andalusite and short milling times on alumina–mullite–zirconia composites. Andalusite powder was added at 0, 2.5, 5, and 10 wt% to an alumina–zircon mixture and the raw materials were milled for 1 or 3 h. The sintering of samples was carried out at the temperatures of 1550°C, 1600°C, and 1650°C for 3 h. Microstructural changes, phase composition, physical properties, and mechanical strength of the sintered composites were characterized by scanning electron microscopy, X‐ray diffraction, density, and strength measurement tests. Results show that andalusite promoted the decomposition of zircon and accelerated the reaction sintering of alumina–zircon, which leads to the formation of much more mullite phase and improvements to the composites’ thermal shock resistance up to about 50%.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Phase Evolution, Microstructure, and Mechanical Properties of Alumina–Mullite–Zirconia Composites Prepared by Iranian Andalusite

Majidian

Nikzad

Eslami-shahed

et al. 2016

Int J Applied Ceramic Tech

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“…This is a crystalline ceramic phase obtained through the reaction between alumina and silica at high temperatures, which presents a set of intrinsic features which allow its use in various applications. Among the most important properties, we highlight: high melting point; good electrical resistance; high mechanical resistance (both at room temperature and high temperatures); low expansion coefficients and thermal conductivities; high creep resistance; it is chemically inert and extremely resistant to thermal shock [2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Production of Mullite from Bentonite Clays and Alumina Residue

Silva

Neves

Gonçalves

et al. 2015

MSF

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Among the ceramic raw materials, mullite is highlighted for presenting features which are of great interest for industry. However, the process through which this material is obtained requires pure reagents, raising the production costs. Therefore, this work is intended to obtain mullite from bentonite clays (source of silicon and aluminum oxides) and alumina residue, resulting from the Bayer process, thus becoming an interesting process from the economic and environmental standpoint. For this purpose, we made use of the thermal treatment in conventional furnace, temperature of 1500°C, heating rate of 5°C/min and dwell time of 60 min at maximum temperature. The synthesized samples were characterized by X-ray fluorescence (EDX), X-ray diffraction (XRD) and scanning electron microscopy (SEM) coupled to an EDS, besides the quantification of the phases present in the samples. The results revealed that mullite was the major phase produced, but corundum appeared as secondary phase.

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Dielectric, electrical and optical properties of aluminosilicate ceramics synthesized by solid-state reaction route

Biswal

Mishra

Mohapatra

et al. 2022

J. Korean Ceram. Soc.

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Mullitization, microstructure and physical properties of mechanically activated andalusite sintered by microwave

Cited by 13 publications

References 11 publications

Phase Evolution, Microstructure, and Mechanical Properties of Alumina–Mullite–Zirconia Composites Prepared by Iranian Andalusite

Phase Evolution, Microstructure, and Mechanical Properties of Alumina–Mullite–Zirconia Composites Prepared by Iranian Andalusite

Production of Mullite from Bentonite Clays and Alumina Residue

Dielectric, electrical and optical properties of aluminosilicate ceramics synthesized by solid-state reaction route

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