• Proceedings of the Korean Ceranic Society Conference
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• 2003.04a
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• pp.157.1-157
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• 2003

• Analytical Science and Technology
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• v.10 no.3
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• pp.225-229
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• 1997

The stability of Rhodamine 6G Perchlorate(Rh6GP) doped in organically modified silicate(Ormosil) was investigated after the Ormosil was synthesized by sol-gel process. The composition of the Ormosil which makes organic dye molecules stable and dimer-free was decided from comparing absorption peaks of dye molecules in sol state, in wet gel and in completely dried gel. The stable and dimer-free Rh6GP doped in the Ormosil was achieved in the 0.1 molar ratio of HCl/TEOS.

• Proceedings of the Korean Ceranic Society Conference
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• 2003.10a
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• pp.175.2-175
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• 2003

• Journal of the Korean Ceramic Society
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• v.42 no.3 s.274
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• pp.165-170
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• 2005

Sol-gel methods offer many advantages over conventional slip-casting, including the ability to produce ceramic membranes. They are purer, more homogeneous, more reactive and contain a wider variety of compositions. We produced ormosil sol using sol-gel process under various molecular weight of polymer species[polyethylene glycol(PEG)] in total system [Tetraethyl ortho silicate(TEOS)-polyethylene glycol(PEG)]. The properties of as-prepared ormosil sol such as viscosity and gelation time are characterized. Also, the ceramic membrane was prepared by dip-coating with synthetic sol and its microstructure was observed by scanning electron microscopy. The permeability and rejection efficiency of membrane for oil/water emulsion were evaluated as cross­flow apparatus. The ormosil sol coated membrane was easily formed by steric effect of polymer and it improved flux efficiency because infiltration into porous support decreased. Its flux efficiency was elevated about $200\;l/m^2h$ compared with colloidal sol coated membrane at point of five minutes from starting test.

• Journal of the Korean Ceramic Society
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• v.36 no.5
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• pp.459-464
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• 1999

A carbon-containing silica glass was prepared from orgaincally modified silicate(Ormosil) by heat treatment in N2 atmosphere after the ormosil was synthesized using sol-gel method. The Ormosil was fabricated from the TEOS as the inorganic component and the PDMS as the organic component. The Ormosil changed to balck-coloured glass by carbon decomposed from the PDMS when the Ormosil was heated to 450$^{\circ}C$ 20hrs. A dense silicon oxycarbide glass with 2.08 g/cm3 was obtained by heating the Ormosil at 1050$^{\circ}C$ 10hrs. The microstructure of the carbon-containing silica glass was observed by SEM and the SiOxC4-x structure was confirmed by XPS measurement. The densification of the glass was studied by measurements of specific surface area linear shrinkage and geometric density.

• Proceedings of the Korean Ceranic Society Conference
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• 2002.10a
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• pp.146.1-146
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• 2002

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.1181-1184
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• 2008

$GeO_2$/ormosil organic-inorganic hybrid films doped with neodymium ions and $TiO_2$/Ormosil organic-inorganic hybrid films dispersed with neodymium oxide nanocrystals are prepared by combining an inverse microemulsion technique and a low-temperature sol-gel technique. The effects of $Nd^{3+}$ concentration, $Nd_2O_3$ nanocrystal content, and heat treatment temperature on up-conversion and photoluminescence luminescence properties of the hybrid films are studied.

• Analytical Science and Technology
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• v.7 no.1
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• pp.17-23
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• 1994

Through sol-gel process, inorganic/organic composite as a dye host was made. It was observed that this composite has about 90% of trnasmittance by UV/VIS spectrophotometer. The transmittance is the most important requirement to decide whether the composite could apply or not as the dye host. The transmittance was increased with decreasing HCl as a catalyst, aging time, and amount of PDMS. Also, fluorescent and transmittant charateristics of Rhodamine 6G Perchlorate that was doped into ORMOSIL were measured. The fluorescent intensity was increased and the trnasmittance was decreased with rising gelling temperature.

• Journal of the Korean Ceramic Society
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• v.29 no.8
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• pp.593-600
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• 1992

Through sol-gel processing, Inorganic-organic composite was obtained. The influence of water content used in hydrolysis on the bonding state, microstructure, strength, and elongation into IR, NMR, Tg, etc. As the water content was increased, the bonds between inorganic Si-(OH) and organic Si-(OH) increased, and relatively denser microstructure was formed. Tensile strength and elongation decreased with amount of water content.

• Proceedings of the Materials Research Society of Korea Conference
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• 2001.11a
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• pp.196-196
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• 2001