Novel mullite-based ceramics manufactured from inorganic wastes

Oliveira, Fernando A. Costa; Livramento, V.; Delmas, Francisco

doi:10.1016/j.jmatprotec.2007.05.011

Cited by 17 publications

(7 citation statements)

References 10 publications

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“…• C. This is related to the fact that higher sintering temperatures lead to the formation of a vitreous phase which enhances mass transfer through viscous ow [6]. Figure 3 shows the SEM micrographs of the samples sintered at 1200, 1250, 1300, 1350, 1400, 1450…”

Section: Methodsmentioning

confidence: 99%

Recycling of Secondary Aluminium Production Waste in Processing of Mullite Based Refractory Ceramics

Kirsever

Karabulut²,

Toplan³

et al. 2015

Acta Phys. Pol. A

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This work describes the studies to reuse secondary aluminium production waste (SAPW) derived from aluminium casting processes in the fabrication of mullite-based refractory ceramics. SAPW was characterized by using particle size analysis, X-ray diraction (XRD), scanning electron microscopy (SEM) and X-ray uorescence (XRF). Secondary aluminium production waste (SAPW), quartz and Grolleg kaolin were mixed stoichiometrically, according to chemical formula of mullite (3Al2O3 · 2SiO2) by ball milling. Cylindrical samples were consolidated by uniaxial dry pressing and sintered at dierent temperatures (up to 1350• C). The phase and microstructural evolution, water absorption, bulk density, mechanical properties of sintered samples were investigated and refractory ceramics based on mullite were obtained.

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Section: Methodsmentioning

confidence: 99%

Recycling of Secondary Aluminium Production Waste in Processing of Mullite Based Refractory Ceramics

Kirsever

Karabulut²,

Toplan³

et al. 2015

Acta Phys. Pol. A

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“…The powders used in this work were slate waste residues with a typical chemical composition of SiO 2 (53-57 wt%), Al 2 O 3 (24-27 wt%), FeO (6-8 wt%), Fe 2 O 3 (1-2 wt%), as well as other oxides including TiO 2 , MnO, MgO, CaO, Na 2 O, K 2 O and P 2 O 5 (8-10 wt%) and organic compounds (5-6 wt% ignition loss) and were characterized in detail elsewhere [1].…”

Section: Methodsmentioning

confidence: 99%

“…However, consolidation of slate powders by conventional powder technology route requires a thorough knowledge of the sintering mechanisms involved when heating these complex materials in order to attain fully dense ceramic bodies. Indeed, upon heating, slate undergoes a series of phase transformations leading to the formation of new phases as indicated by conventional X-Ray diffraction (XRD) and differential thermal analysis (DTA) and thermogravimetric analyses (TGA), the nature of which is still uncertain [1].…”

Section: Introductionmentioning

confidence: 99%

Fe K-Edge XAFS Study of Slate Powders Heat Treated up to 1000°C

Oliveira

Nitani

Nakagawa

et al. 2010

MSF

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The use of ultra-bright, highly directional, high and variable energy associated to synchrotron radiation beams at SPring-8 when compared with conventional X-Ray diffraction analysis applied to slate powders heat treated at temperatures in the range of 600°C up to 1000°C is reported. Fe K-edge XAFS measurements of the products formed upon heating slate showed that in the temperature range 600-800°C, conversion of FeO present in the as-received slate powder into a mixed -Fe2O3/-Fe2O3 has occurred providing useful information on the short-range order atomic structure of the slate. Above 800°C, mainly -Fe2O3 was identified to be present in the slate. The change of the Fe valences within the slate network is most likely responsible for the detected colour change with the increasing temperature.

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“…F.A. Costa Oliveira et al, 2007 [5] prepared mullite from slate sludge and aluminum-containing residues. V. Viswabaskaran et al, [6] prepared mullite from calcined clay-alumina mixtures and C.Y.…”

Section: Introductionmentioning

confidence: 99%

Production of Mullite Ceramic Bodies from Kaolin Processing Waste and Aluminum Hydroxide

Choo

Murshidi

Saidin

et al. 2017

MSF

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Small pellets with differing mullite contents were prepared by a conventional ball-milling and dry-powder pressing technique, followed by firing at temperature of 1300°C and 1600°C for four hours. Kaolin processing waste and high purity aluminum hydroxide were used as starting materials. The sintered samples were examined using X-ray diffraction to determine the weight percent of each identified phase. The results showed that the percentage of mullite in kaolin processing waste can be increased by introducing additional aluminum hydroxide. It was found that sintered samples yielded best results when derived from both types of kaolin processing waste with 40wt% of aluminum hydroxide and a firing temperature of 1600°C.

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Novel mullite-based ceramics manufactured from inorganic wastes

Cited by 17 publications

References 10 publications

Recycling of Secondary Aluminium Production Waste in Processing of Mullite Based Refractory Ceramics

Recycling of Secondary Aluminium Production Waste in Processing of Mullite Based Refractory Ceramics

Fe K-Edge XAFS Study of Slate Powders Heat Treated up to 1000°C

Production of Mullite Ceramic Bodies from Kaolin Processing Waste and Aluminum Hydroxide

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