Pyrocerams based on cordierite glass synthesized in solar furnace with enhanced sintering range

Adylov, G. T.; Voronov, G. V.; Zufarov, M. A.; Кулагина, Н. А.; Mansurova, E. P.; Rumi, M. Kh.

doi:10.3103/s0003701x11010026

Cited by 2 publications

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The addition of Zn (6% ZnO) to the cordierite glass decreases the sintering temperature (by ∼20 • C) and led to form gahnite (ZnAl 2 O 4 ) in addition to cordierite. 7 In diesel particulate filters based on cordierite, the contamination by Zn gave zinc silicate, zinc aluminium with spinel structure, and a glassy phase above 1000 • C. 8 Nucleation is studied in a magnesium aluminosilicate glass-containing ZnO and TiO 2 as nucleating agents; they found that zinc * Author for correspondence (ehamzawy@lycos.com) and titanium are major components in the first crystallized phases. 9 In the MgO-Al 2 O 3 -SiO 2 system, replacement of Al 2 O 3 by ZnO can lower the melting temperature of glass and crystallization temperature of the glass-ceramics and both cordierite and gahnite were successfully fabricated at relative low temperature (< 950 • C).…”

Section: Introductionmentioning

confidence: 99%

Sintered gahnite–cordierite glass-ceramic based on raw materials with different fluorine sources

Hamzawy

Hussain

2015

Bull Mater Sci

View full text Add to dashboard Cite

Glass-ceramic based on Zn-containing cordierite was prepared from kaolin, silica'sand and commercial ZnO. The addition of AlF 3 , MgF 2 and CaF 2 was performed as nucleation catalysts. Dark brown glasses were obtained from the glass batches. The transformation and crystallization temperatures were in the range of 739-773 and 972-1007 • C, respectively. Gahnite, cordierite and very little enstatite were the development crystalline phases through the heating and sintering process between 1000 and 1340 • C. The microstructure of crystallized samples at 1340 • C showed the appearance of dominant euhedral octahedral crystals of gahnite and hexagonal cordierite, in the low micro-scale, disseminated in the glassy matrix. The microanalysis of the crystallized samples indicated that Zn and Mg may replace each other in gahnite and cordierite structure. Densities of the crystallized samples were between 2.2517 and 2.5278 g cm −3 . The thermal expansion of the crystallized samples was ranging from 19.22 to 59.30 × 10 −7• C −1 . However, the higher crystallization of both cordierite and gahnite accompany with the higher values of densities and the lower values of coefficient of thermal expansion.

show abstract

Section: Introductionmentioning

confidence: 99%