Development of celsian ceramics from fly ash useful for X-ray radiation-shielding application

Amritphale, S. S.; Anshul, Avneesh; Chandra, Navin; Ramakrishnan, N.

doi:10.1016/j.jeurceramsoc.2007.03.034

Cited by 40 publications

(12 citation statements)

References 30 publications

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“…However, a variety of other alternative raw materials can also be used for this purpose, among which Coal Fly Ash (CFA) is one of the less frequently employed [14]. CFA is a byproduct of coal-burning power plants, whose main chemical constituents are Si0 2 and A1 2 0 3 , and whose main mineralogical components are quartz, mullite (A16SÍ2O13) and a highly reactive amorphous phase [15].…”

Section: Introductionmentioning

confidence: 99%

“…It is worth mentioning that Amritphale et al [14], who are up to now the only researchers to have used CFA as raw material for the synthesis of Celsian BaAl 2 SÍ20g-containing ceramics, did not study either the Hexacelsian to Celsian transformation or the effect of SrO doping on the latter transformation in their materials. In fact, the chemical compositions studied by these authors differ greatly from those studied in the present work, in such a way that completely different phase compositions and microstructures were obtained in both cases, and for different intended applications.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of monoclinic Celsian from Coal Fly Ash by using a one-step solid-state reaction process

Long-González

López-Cuevas

Gutiérrez-Chavarría

et al. 2010

Ceramics International

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Monoclinic (Celsian) and hexagonal (Hexacelsian) Ba 1 _ JC Sr JC Al 2 Si 2 0 8 solid solutions, where x = 0,0.25,0.375,0.5,0.75 or 1, were synthesized by using Coal Fly Ash (CFA) as main raw material, employing a simple one-step solid-state reaction process involving thermal treatment for 5 h at 850-1300 °C. Fully monoclinic Celsian was obtained at 1200 °C/5 h, for SrO contents of 0.25 < x < 0.75. However, an optimum SrO level of 0.25 < x < 0.375 was recommended for the stabilization of Celsian. These synthesis conditions represent a significant improvement over the higher temperatures, longer times and/or multi-step processes needed to obtain fully monoclinic Celsian, when other raw materials are used for this purpose, according to previous literature. These results were attributed to the role of the chemical and phase constitution of CFA as well as to a likely mineralizing effect of CaO and Ti0 2 present in it, which enhanced the Hexacelsian to Celsian conversion.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of monoclinic Celsian from Coal Fly Ash by using a one-step solid-state reaction process

Long-González

López-Cuevas

Gutiérrez-Chavarría

et al. 2010

Ceramics International

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“…Ceramic radiotransparent materials are mainly used for the manufacture of radomes protecting antennas against the environmental influences. Besides the above mentioned requirements radio-ceramic materials must have: a high value of thermal resistance, low coefficient of linear thermal expansion and at the same time should protect the equipment from external influences [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Ceramic radiotransparent materials on the basis of BaO-Al2O3-SiO2 and SrO-Al2O3-SiO2 systems

Лисачук¹,

Kryvobok²,

Fedorenko³

et al. 2015

Epitoanyag - JSBCM

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Based on the literature review, the authors made a justified choice of ceramic materials with a low dielectric constant and dielectric loss tangent. The composition and process parameters (burning temperature -1550 °C, burning duration -5 hours) of producing of celsian and Sr-anorthite ceramics with low dielectric properties were defined. The phase composition of products of burning was examined. X-ray phase studies of Sr-ceramics after burning were conducted.

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“…The SBAS solid solutions can be potentially useful for environmental barrier coatings (EBCs) such as those employed for Si-based (SiC, Si 3 N 4 ) ceramic components in the hot section of advanced gas turbine engines (1), as well as for X-ray radiation-shielding applications (2) and for the fabrication of missile nose cones (radomes) (3), among other applications. These materials can be obtained by partial substitution of BaO by SrO in BaAl 2 Si 2 O 8 (BAS) (4,5), or alternatively from mixtures of BAS with SrAl 2 Si 2 O 8 (SAS) (6).…”

Section: Introductionmentioning

confidence: 99%

Solid state reaction synthesis of Ba0.75Sr0.25AlSi2O8 - Al2O3 ceramic composites from mechanically activated precursor mixtures

Ramírez¹,

López-Cuevas²,

Rodríguez-Galicia³

et al. 2014

Bol. Soc. Esp. Ceram. Vidr.

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Development of celsian ceramics from fly ash useful for X-ray radiation-shielding application

Cited by 40 publications

References 30 publications

Synthesis of monoclinic Celsian from Coal Fly Ash by using a one-step solid-state reaction process

Synthesis of monoclinic Celsian from Coal Fly Ash by using a one-step solid-state reaction process

Ceramic radiotransparent materials on the basis of BaO-Al2O3-SiO2 and SrO-Al2O3-SiO2 systems

Solid state reaction synthesis of Ba<sub>0.75</sub>Sr<sub>0.25</sub>AlSi<sub>2</sub>O<sub>8</sub> - Al<sub>2</sub>O<sub>3 ceramic composites from mechanically activated precursor mixtures

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