Preparation of mullite ceramics from bayer electrofilter fines and low kaolinite clay

Tutic, Erna; Jovanović, Marina; Mujkanović, Adnan

doi:10.2298/sos1602247t

Cited by 11 publications

(7 citation statements)

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“…The mullite is an aluminosilicate compound that is used for conventional and advanced ceramic applications due to low density, low thermal conductivity, low thermal expansion, low dielectric constant, excellent mechanical properties at high temperature [24]. In our test specimen, primary mullite started neoformation at 1050 °C and increased gradually with temperature (Fig.…”

Section: Mullite Phasementioning

confidence: 88%

Mineralogical transformation and microstructure of the alluvials clays

Yannick

Sylvain

Nicolas³

et al. 2019

Sci Sintering

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Mineralogical transformations and microstructures during the firing alluvial clays from Monoun plain were studied. The firing of clays was carried out in the temperature range from 800 to 1150 o C. Minerals transformation was investigated by X-ray diffraction, polarize stereomicroscopy and scanning electron microscopy (SEM). In the raw materials, typical assemblages with quartz, kaolinite, goethite, anatase, hematite, gibbsite and feldspar were observed. Many neoformed mineral phases were identified with the reaction products including mullite, cristobalite, spinel, amorphous phase which occurred in the high temperature (1050-1150 o C) in the fired bricks. The quartz phenocrist with some microlites oxides embedded in few mesostasis glass have been illustrated at 950 o C by stereomicroscopy analysis. At 1150 o C, the vitreous matrix has embedded phenocrist of quartz and other relic minerals. The best temperature for fired alluvial clay brick was discovered between 1050-1150 o C.

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Section: Mullite Phasementioning

confidence: 88%

Mineralogical transformation and microstructure of the alluvials clays

Yannick

Sylvain

Nicolas³

et al. 2019

Sci Sintering

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“…When the porcelain samples were fired up to 1300 o C, high vitrification and densification of the porcelains was observed at 1250 o C, however at the sintering temperature greater than 1250 o C porcelains became more porous and did not maintain their regular shapes and started to melt as shown in Figure 2. This might be due to over sintering phenomenon which occurred in the porcelain samples [14]. Scanning electron micrographs of the sintered porcelain samples are presented in Figure 3.…”

Section: Tab I Porcelain Bodies Formulations In Percentages Weight (mentioning

confidence: 99%

Evaluation of Kalalani vermiculite for production of high strength porcelain insulators

Ngayakamo

Park

2019

SCI SINTER

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The present work has evaluated Kalalani vermiculite as a potential raw material for the production of high strength porcelain insulators. Three porcelain compositions were prepared to contain 0, 20 and 30 wt% of Kalalani vermiculite. Porcelain samples were fabricated using a semi-drying method. The chemical, mineralogical phases and microstructural characterization of the raw materials were carried out using XRF, XRD, and SEM techniques, respectively. Water absorption, bulk density, dielectric and bending strengths were performed on porcelain samples fired up to 1300 o C. However, at the sintering temperature of 1250 o C, the porcelain sample with 20 wt% of Kalalani vermiculite gave the dielectric strength of 61.3 kV/mm, bending strength of 30.54 MPa, bulk density of 2.21 g/cm 3 and low water absorption value of 0.21 % which is the prerequisite properties for high strength porcelain insulators. It was therefore concluded that Kalalani vermiculite has the potential to be used for the production of high strength porcelain insulators.

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“…Needlelike secondary mullite crystals and primary mullite crystals are also detected. Needle-shaped mullite crystals (secondary mullite, Type 2) were observed in NS1 [13]. Mullite needles formed in areas containing fine clays, feldspars and quartz [14].…”

Section: Sem Analysismentioning

confidence: 99%

The effect of nepheline syenite addition on pyroplastic deformation of sanitarywares

Aydın

Kunduraci

Akbay³

2018

SCI SINTER

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Nepheline syenite is used instead of feldspars as fluxing in ceramics. In this study, three ceramic bodies were prepared. Nepheline syenite was substituted by Na feldspar in the ratio of maximum 30 wt.%. The pyroplastic deformation was evaluated together with technological properties, including linear shrinkage, water absorption and strength. Phase and microstructural characteristics were also investigated. Results showed that the addition of nepheline syenite provided a decrease in viscosity. The decrease in viscosity caused an increase in the tendency for pyroplastic deformation in bodies containing nepheline syenite; however, this result shows that bodies containing nepheline syenite can be sintered at a lower temperature than the standard body. The addition of nepheline syenite also decreased water absorption and increased strength.

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Preparation of mullite ceramics from bayer electrofilter fines and low kaolinite clay

Cited by 11 publications

References 0 publications

Mineralogical transformation and microstructure of the alluvials clays

Mineralogical transformation and microstructure of the alluvials clays

Evaluation of Kalalani vermiculite for production of high strength porcelain insulators

The effect of nepheline syenite addition on pyroplastic deformation of sanitarywares

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