• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2005년도 춘계학술대회 논문집
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• pp.33-36
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• 2005

Colloidal Silica(CS)/silane sol solutions were prepared in variation with synthesizing parameters such as ratio of CS to silane and reaction time. In the case of LHSA CS/tetramethoxysilane(TMOS)/methyltrimethoxysilane(MTMS) CS/silane sol, coating film had stable contact angle with increasing reaction time excepting for 48hours. Also, the LHSA CS/TMOS/MTMS coating film had more enhanced flat surface with increasing the amount of MTMS and increasing reaction time. In the case of thermal stability, thermal dissociation of LHSA CS/MTMS sol did not occur up to $550^{\circ}C$.

• 한국세라믹학회지
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• 제32권9호
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• pp.995-1002
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• 1995

The alumina fiber was obtained by extruding the TEA complexed polymeric sol, synthesized by the alkoxide sol-gel method, through nozzle. The purpose of this study was to investigate the properties of fiber spun by TEA complexed sol. The analysis of sol indicated that TEA was bonded at alkoxide precursor and the optimum molar ratio for spinning was 0.5 mole of TEA, 3 mole of H2O. The cross section of the fiber from circular nozzle was not circular but oval, which indicated that the shape of nozzle did not affect the shape of fiber. The diameter of the fiber was about 100 ${\mu}{\textrm}{m}$ in the state of dried gel fiber, 60${\mu}{\textrm}{m}$ in calcined fiber, and the tensile strength of the fiber calcined at 90$0^{\circ}C$ was 2.1$\times$108 Pa.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1994년도 하계학술대회 논문집 C
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• pp.1472-1474
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• 1994

In this paper, $TiO_2-V_2O_5$ thin films are fabricated by Sol-Gel method and their humidity-sensing characteristics have been investigated. The microstructure of specimen is porous. The humidity-sensing characteristics of thin films are good according to increasing heat treatment temperature and decreasing measurement frequency.

• 한국세라믹학회지
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• 제28권1호
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• pp.60-66
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• 1991

The polymeric alumina sol was prepared by partial hydrolysis of aluminum sec-butoxide reacted with acetylacetone and its characteristics was investigated. The effects of alcohol solvent, acetylacetone, and acid concentration to the sol were investigated. FT-IR and Al27-MASNMR were used to study hydrolysis and polymerization reaction of aluminum complex. Synthesized sol showed the characteristics of polymeric alumina sol. To make a clear polymeric alumina sol, the optimum contents of acetylacetone, H2O and alcohol solvent were 0.4-0.6 mole, 0.25-1.25 mole, 3-5 mole per one mole alkoxide respectively. As a result of the Al27-MASNMR analysis, it was noted that hexa-penta-coordinated Al were main structure.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2008년도 하계학술대회 논문집 Vol.9
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• pp.443-443
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• 2008

차세대 LCD back light 시스템으로 Xe plasma plat lamp를 주목하고 있으나 자외선 여기 효율이 떨어져 램프의 휘도 및 광 효율이 낮은 단점을 가지고 있어 이에 따른 개선이 요구되고 있다. MgO는 AC-PDP에서 방전전압의 저하, 방전의 안정성, 동작마진과 같은 특성에 영향을 미치고 있기에 이번 연구 에서는 졸겔법으로 제작한 MgO를 프린팅 방법으로 flat fluorescent lamp에 적용하였다. 실험시 사용한 flat fluorescent lamp의 경우 ITO 전극과 MgO layer 그리고 형광체층을 가진 두 장의 유리판 사이에 Ne-Xe기체를 채운 단순한 구조로 제작하였다. 실험은 압력과 방전거리에 따른 특성을 살펴보았으며, 그 결과 MgO layer 채용한 경우 방전 전압의 감소 및 static margin의 증가를 알 수 있었다.

• E2M - 전기 전자와 첨단 소재
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• 제5권2호
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• pp.175-181
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• 1992

Y-Ba-Cu-O계 보다 화학적 내구성이 좋은 Bi-Sr-Ca-Cu-O계 초전도체 wire를 중합 binder와 초전도체 파우더를 혼합하여 sol-gel법으로 제조하였다. 여러가지 혼합비와 열처리 조건하에서 제조한 wire의 특성분석 결과 Bi$_{2}$Sr$_{2}$Ca$_{2}$Cu$_{3}$O계 초전도체와 binder의 최적 혼합율은 22.25%이었고 가열비는 0.33.deg.C/min로 500.deg.C까지는 Ar gas와 $O_{2}$ gas분위기로 열처리하고 500.deg.C에서 835.deg.C까지는 $O_{2}$ gas분위기에서 40h동안 열처리하였을때 임계온도 98K를 갖는 초전도 선재를 얻을 수 있었다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 C
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• pp.1927-1929
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• 2005

Colloidal Silica(CS)/methyltrimethoxy silane(MTMS) sol solutions were prepared in variation with synthesizing parameters such as kinds of CS, acidity and reaction time. In order to understand its surface properties, sol-gel coating films on glass were fabricated. The coating film obtained from CS/MTMS sol had stable contact angle and more enhanced flat surface at reaction time of 24 hours. In case of the initial and final period of reaction, the coating films had unstable contact angle and more rough surface. In addition, surface of CS/MTMS sol-gel coating film was more rougher with increasing of acidity.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2000년도 추계학술대회 논문집
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• pp.192-195
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• 2000

Antimony doped tin oxyde thin films have been deposited by sol-gel method using non-alkoxide precursor SnCl$_2$$.$2H$_2$O as host and SbC1$_3$ as dopant material. Using spin coating method, thin films of thickness up to 200nm have been uniformly deposited on Corning 1737F non-alkali glass substrates. Effect of Sb doping concentration and heat treatment on electrical and optical properties was investigated. Heat treatment was performed at the temperature from 350$^{\circ}C$ to 650$^{\circ}C$ in flowing O$_2$. The resulting ATO films showed widely changing electrical resistivity and optical transmittance values in the visible spectrum depending on the composition and firing condition.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.1
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• pp.555-558
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• 2004

In this paper, the variable producing conditions of YBCO superconducting powder by use of sol-gel method was investigated. YBCO superconducting powder which was prepared by sol-gel method was shown the characteristic gel formation, particle size and its properties under variable preparation conditions, such as pH, drying and processing time, and powder heat treatment, etc.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2006년도 하계학술대회 논문집 Vol.7
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• pp.230-231
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• 2006

We synthesized sol according to kinds(particle size/stabilized ion) of colloidal silica(CS), content ratio of alkoxysilane versus CS and reaction degree in sol solution and studied the surface property of coated gel materials. The contact angle of the thin films prepared from LHSA/N1030 CS/tetramethoxysilane(TMOS)/methyltrimethoxysilane(MTMS) sol-gel reaction system showed a little good relationship with content ratio of TMOS/MTMS silanes. The surface roughness of LHSA CS/TMOS/MTMS reaction system showed flatter than that of LHSA/N1030 CS. The thermal degradation of LHSA CS/TMOS/MTMS coating flim occurred at $550^{\circ}C$.