Fired ceramics 100% from lignite fly ash and waste glass cullet mixtures

Karayannis, Vayos; Moutsatsou, A.; Domopoulou, Asimina; Katsika, Eleni; Drossou, C.; Baklavaridis, Apostolos

doi:10.1016/j.jobe.2017.09.006

Cited by 31 publications

(14 citation statements)

References 20 publications

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“…Glass-ceramics are widely used as machinable ceramics, cooking ceramics, building materials, electrical ceramics, optical materials, bio-ceramics, glass semiconductors in thermal insulation, etc [1][2][3][4][5][6][7][8][9][10][11][12]. Some applications require the glass-ceramics to be high strength and lightweight.…”

Section: Introductionmentioning

confidence: 99%

Glass-ceramics fabricated by efficiently utilizing coal gangue

Dang

2020

Journal of Asian Ceramic Societies

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Glass-ceramics with high strength and lightweight were developed by comprehensively utilizing coal gangue and clay. This work optimized the many processing parameters including the rate of using coal gangue, coal gangue to clay ratio, mineralizers, and process of forming and sintering. Using coal gangue of 75% and coal gangue to clay ratio of 3/1 made the mechanical properties optimal. The sintering temperature of 1370°C was found to be optimal because mullite and spinel become the main crystal phase and thereby realizing high strength, low water absorbance, and low density for the sintered glass-ceramics. The mechanical properties of the glass-ceramics were further enhanced by adding mineralizer (TiO 2 , ZnO, and MnO 2 /dolomite) with reasonable amounts. Moreover, the properties were enhanced by optimizing processing parameters. We developed an excellent approach to sinter glass-ceramics illustrated high strength, lightweight, and low water absorption by efficiently utilizing and managing waste minerals. The sintered glass-ceramics can be used as high-performance proppant materials, cooking ceramics, and building materials ARTICLE HISTORY

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Section: Introductionmentioning

confidence: 99%

Glass-ceramics fabricated by efficiently utilizing coal gangue

Dang

2020

Journal of Asian Ceramic Societies

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“…It is used in the building materials industry as a raw material for the production of Portland clinker [2], as an addition to cement [3,4], mortar [5] and concrete [6][7][8], as well as sintered ceramic products [9,10]. Fly ash was also researched as a starting material for the production of high-degree-of-consolidation and low-porosity ceramics [11,12]. This type of material is sintered with a large proportion of the liquid phase at well-defined temperature intervals to avoid thermal softening and/or bloating.…”

Section: Introductionmentioning

confidence: 99%

Thermal studies of fly ashes expansion

Wons

Rzepa

Reben

et al. 2020

J Therm Anal Calorim

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The object of this study is to investigate the thermal properties of fly ashes from the last, farthest dedusting zone in terms of their use as ceramic masses additives. Siliceous fly ash is valuable additive to ceramic mass, which not only reduces its plasticity, but also actively affects sintering process and shapes the properties of the final material. The finest fly ash fractions are potentially useful flux materials in ceramics; however, a significant limitation in their use is due to thermal expansion/ bloating occurring during high-temperature sintering. The bloating mechanism of fly ashes was investigated in relationship to their chemical composition with the use of DTA/TG/EGA analysis as well as high-temperature microscope. Chemical and phase compositions were studied by X-ray fluorescence and X-ray diffraction. Based on the results obtained, it can be concluded. The results indicate that bloating mechanism is caused by the co-occurrence of two phenomena accompanying sintering: appearance of high amount of liquid phase and simultaneous gas release from sintered material. The dominant mechanism is the simultaneous release of sulfur (IV) oxide and oxygen as a result of the redox reaction of removing SO 3 from the vitreous phase.Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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“…Glass-ceramics are attractive materials used in various applications such as building materials, cooking ceramics, machinable ceramics, bio-ceramics, electrical ceramics, glass semiconductors in thermal insulation, optical materials, etc. [1][2][3][4][5][6][7][8][9][10]. High strength and lightweight are required for some applications.…”

Section: Introductionmentioning

confidence: 99%

High strength glass-ceramics sintered with coal gangue аs а raw material

Dang

2019

Sci Sintering

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High strength lightweight glass-ceramics were fabricated with coal gangue and clay as main raw materials. The utilization ratio of coal gangue, the ratio of the coal gangue with clay, mineralization agents, forming process and sintering process on the properties of the fabricated glass-ceramics were optimized. The utilization ratio of coal gangue reached 75, and the ratio of coal gangue to clay was 3/1, as an optimal property was observed. The optimal sintering temperature was found to be 1370 o C. At this optimal temperature, the sintered glass-ceramics showed the main phase of mullite and spindle and so showed high strength, low density, and low water absorbance. The appropriate amounts of codoping of the TiO 2 , ZnO, and MnO 2 /dolomite as mineralization agents obviously enhanced the properties of the glass-ceramics. Process optimizations further determined reasonable and optimal process parameters. The high strength lightweight glass-ceramics fabricated in this work may be very suitable for various applications including building materials, cooking ceramics, and proppant materials, et al.

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Fired ceramics 100% from lignite fly ash and waste glass cullet mixtures

Cited by 31 publications

References 20 publications

Glass-ceramics fabricated by efficiently utilizing coal gangue

Glass-ceramics fabricated by efficiently utilizing coal gangue

Thermal studies of fly ashes expansion

High strength glass-ceramics sintered with coal gangue аs а raw material

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