Low-temperature cordierite glass from autoclave-prepared gel

Vesteghem, H.; Giampaolo, A.R. Di; Dauger, A.

doi:10.1007/bf01729177

Cited by 28 publications

(7 citation statements)

References 3 publications

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“…The peak is a reproducible one and has also been noticed in [4], but its origin remains obscure to us. As to other two effects, our results fully coincide with [3,4]. The effect at 1015 ~ is assigned to crystallization of M-cordierite and at 1100 ~ to g-~ cordierite transformation.…”

Section: ~supporting

confidence: 87%

“…5. It looks quite like the DTA line in the cordierite gel presented in [3] although the temperature of the first exothermal effect is slightly lower. The peak is a reproducible one and has also been noticed in [4], but its origin remains obscure to us.…”

Section: ~mentioning

confidence: 88%

“…Because of this obstacle the direct hydrolysis of the alkoxide mixture yields inhomogeneity in the resultant xero-gel and requires successive high temperature treatment to equalize the distribution of ions by diffusion [6,73. The problem was approached by partial hydrolysis of TEOS prior to being mixed with other alkoxides [3,4,5]. However, it should be mentioned that the matter of determination of the conditions and the extent of partial hydrolysis is sufficiently involved and requires additional experimental research in every particular case.…”

Section: Introductionmentioning

confidence: 99%

“…The sol-gel technique is a well-known means of preparing fine powders possessing an extensive surface area, high intrinsic energy and consequently high sinterab!lity [1,2], hence allowing a broadening of the sintering interval. Obviously, for this reason a number of investigators have taken up the sol-gel preparation route for its advantages [3,4,5].…”

Section: Introductionmentioning

confidence: 99%

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Preparation of cordierite ceramics by sol-gel technique

1991

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Xerogel with cordierite composition Mg2AI3[AISi~O18 ] from aluminium and magnesium 2-ethoxyethoxides and tetraethylortosilicate have been prepared, the latter being not previously partially hydrolized. Conditions to obtain not only homogeneous but also sinterable gel have been determined. All the powders derived were characterized by DTA, TG, BET and X-ray diffraction. Bulk cz-cordierite material of 97% from theoretical density have been obtained by sintering.

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Section: ~supporting

confidence: 87%

Section: ~mentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation of cordierite ceramics by sol-gel technique

1991

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“…31,32 However, by increasing the sintering temperature further, densification stopped. The amorphous silica component crystallizes to α-quartz.…”

Section: 2a Bulk Density and Porositymentioning

confidence: 99%

Processing and characterization of pure cordierite and zirconia-doped cordierite ceramic composite by precipitation technique

et al. 2015

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Pure cordierite and cordierite-ZrO 2 composite (5-20 wt%) ceramics for various stoichiometric compositions were synthesized from standard raw materials by a novel precipitation technique. The analytical techniques such as X-ray diffraction, simultaneous thermogravimetric and differential thermal analysis, Fourier transform infrared spectroscopy, scanning electron microscopy and bulk density were employed to evaluate the properties and microstructure. Results show that the ceramic composites consist of cordierite and zircon phases. The cordieritezirconia (20 wt%) increased the fracture toughness value from 3.38 to 3.94 MPa, which is mainly due to martensitic transformation present in zirconia. The flexural strength of composite was found to increase from 126.46 to 297.62 MPa. The thermal expansion coefficients of cordierite and cordierite-zirconia (20 wt%) were 4.08 × 10 −6 and 4.42 × 10 −6 • C −1 which may be due to the addition of zirconia.

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