Influence of temperature and solid content on fused silica slip-casting kinetics

Kostic, B; Gašić, Maja

doi:10.1016/0272-8842(92)90063-j

Cited by 5 publications

(7 citation statements)

References 2 publications

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“…Slurries could not be prepared with the addition of higher amount of egg white replacing sucrose for the same composition. Thus, the above composition (Si 70 _(S1E) 10 _E 10 ) was considered as optimum owing to Si 70 _(S1E) 20 _E 00 20% sucrose 2.2 37 S 5 Si 70 _(S1E) 10 _E 10 10% (egg white1sucrose) 1.2 55 S 6 Si 70 _(S1E) 0.5 _E 0.5 0.5% egg white 1.6 42 S 7 Si 70 _(S1E) 01 _E 01 1% egg white 1.3 50 S 8 Si 70 _(S1E) 1 maximum possible amount of total binder at the highest (70 vol%) loading and minimum viscosity.…”

Section: Resultsmentioning

confidence: 99%

“…4,5 Most common applications of fused silica ceramics include radomes, thermal insulation and thermal protection systems, refractory applications in metal processing, kiln furniture, ceramic cores for investment casting, 6 etc. Forming of fused silica products is carried out mostly by pressing and slip casting, 5,7 although the fabrication of dense shapes through gel casting using a crosslinking polymer has also been reported in a few literatures. 8 The process is not environment friendly owing to the toxicity of polymers.…”

Section: Introductionmentioning

confidence: 99%

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An Optimized Composition for Making Dense Fused Silica Bodies from Highly Loaded Slurries Using Egg White and Sucrose

Mohanta

Bhargava

2010

Journal of the American Ceramic Society

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Fused silica slurries with a maximum ceramic loading of 70 vol% were prepared using aqueous premixes with egg white (0.5–1.5 vol%) and/or sucrose (5–20 vol%). The egg white and sucrose content in the premix were optimized to obtain a shear‐thinning slurry. Observation indicated the existence of an optimum composition (Si70_(S+E)10_E10), for which slurry viscosity was minimum. Thermal analysis confirms the interaction between egg white and sucrose molecules, which influence interparticle interaction and slurry properties. Green samples cast from optimum slurry composition exhibited the highest mechanical properties. Linear drying and sintering shrinkage of samples were 0.5% and 1.0%, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Optimized Composition for Making Dense Fused Silica Bodies from Highly Loaded Slurries Using Egg White and Sucrose

Mohanta

Bhargava

2010

Journal of the American Ceramic Society

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“…It also plays very important role in diversified fields such as refractory materials in metal processing and kiln furniture . In general, fused silica ceramics is fabricated by powder processing methods like cold and hot compaction techniques, slipcasting, injection molding, and gelcasting process . The fused silica raw material powder is obtained by grinding in ball milling using melt and quenched amorphous silica lumps .…”

Section: Introductionmentioning

confidence: 99%

Reliability studies of gelcast fused silica between organic and inorganic binder systems

Manivannan

Srikanth

Kumar

et al. 2017

Int J Applied Ceramic Tech

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Fused silica ceramics was prepared by using conventional organic binder, mathacrylamide‐N,N′‐methylenebisacrylamide (MAM‐MBAM) system by gelcasting process. Mechanical properties of green bodies were studied as a function of solid loading varying from 60 to 72 vol%. After evaluating the green body mechanical properties, the samples were densified at different sintering temperature from 1200 to 1450°C with definite intervals of 50°C and subjected to flexural strength analysis. Variation in flexural strength with sintering temperature was observed and correlated with the quantity of devitrification of fused silica during sintering. Quantification of devitrified cristobalite was carried out by using 20 wt% rutile (TiO2) as an internal standard by X‐ray diffraction. It was found that, as the cristobalite content increased, flexural strength decreased. Reliability studies were carried out for the samples having maximum flexural strength with and without crystalline content. Reliability studies have shown that for this organic binder system the sample sintered at 1300°C is crystalline free and most reliable product. The mechanical properties and reliability of this product processed with organic binder are compared with inorganic binder system. Results indicate that the sample fabricated using inorganic binder system is exhibiting high Weibull modulus and thus better reliability.

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“…Due to these properties, fused silica could find a wide range of strategic and industrial applications such as electromagnetic transparent materials, thermal protection systems as refractory materials in metal processing and kiln furniture etc . Fabrication of fused silica products is conventionally carried out by hot pressing, slip casting and recently gelcasting process also have been reported . Among these forming processes, the most suitable process is Gelcasting process to fabricate near‐net shape of ceramics having complex shapes.…”

Section: Introductionmentioning

confidence: 99%

Aqueous Gelcasting of Fused Silica Using Colloidal Silica Binder

2013

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An aqueous-based gelcasting of fused silica ceramics by using colloidal silica binder was developed. Fused silica slurries having different volume percentage of solid loading from 63 to 74 vol% in colloidal silica were made and the rheological properties were evaluated. It was found that the slurry with 73 vol % of solid loading with viscosity 0.70 Pa.s is suitable for this gelcasting system. The influence of solid loading on physical and mechanical properties of gelcast green and sintered bodies has been studied. The fabricated green body by using colloidal silica binder exhibited a flexural strength of 9 MPa and 88% of theoretical density with 2.2% of drying shrinkage while the sintered sample exhibited flexural strength of 60 MPa and 95% of theoretical density with 4.3% of sintering shrinkage. It was observed that, the nano silica particles from the colloidal silica binder is filling the interstitial positions in the consolidated fused silica green body and enhancing physical and mechanical properties. J ournalbehavior of the silica slurry was studied by measuring storage modulus (G′) in the oscillatory mode at a frequency of 1 Hz and at a constant strain of 0.2%.

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Influence of temperature and solid content on fused silica slip-casting kinetics

Cited by 5 publications

References 2 publications

An Optimized Composition for Making Dense Fused Silica Bodies from Highly Loaded Slurries Using Egg White and Sucrose

An Optimized Composition for Making Dense Fused Silica Bodies from Highly Loaded Slurries Using Egg White and Sucrose

Reliability studies of gelcast fused silica between organic and inorganic binder systems

Aqueous Gelcasting of Fused Silica Using Colloidal Silica Binder

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