• Journal of the Korean Crystal Growth and Crystal Technology
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• v.8 no.4
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• pp.619-625
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• 1998

The effect of softening point and glass amount of glass frit on the sintering behavior of low temperature cofirable glass/ceramic composites was studied and according to these results, glass/ceramic composites with high sintered density was fabricated. The density of composites was increased as the glass amount was increased. In case of using the glass with low softening point, the deformation of specimen was occurred though the ratio of the glass amount in the specimen was low. But, in case of using the glass with high softening point, the sintered density of composites was increased in accordance with glass amount. With the specimen of high softening point, the deformation was not happened. Therefore, it was found that the densification was progressed continuously in high glass amount. From the study on the effect of softening point of glass on sintering behavior, the suitable softening point and glass amount for fabrication of glass/ceramic composites can be anticipated. When glass frit with softening point of $790^{\circ}C$ was chosen according to this result, low temperature cofirable glass/ceramic composites with high density (97%) at $900^{\circ}C$ was fabricated.

• Proceedings of the Korean Ceranic Society Conference
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• 2000.04a
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• pp.162.1-162.1
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• 2000

• Proceedings of the Korean Ceranic Society Conference
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• 2002.10a
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• pp.125.2-125
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• 2002

• Proceedings of the Korean Ceranic Society Conference
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• 2000.10a
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• pp.75.2-75
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• 2000

• Ceramist
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• v.2 no.1
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• pp.37-40
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• 1999

• Proceedings of the Korean Ceranic Society Conference
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• 2000.04a
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• pp.83.1-83.1
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• 2000

• Proceedings of the Korean Ceranic Society Conference
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• 2002.10a
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• pp.181.1-181
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• 2002

• Journal of the Korean Ceramic Society
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• v.22 no.2
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• pp.58-62
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• 1985

2.5~40$mu extrm{m}$ 영역에서 $As_2S_3$ 및 $GeS_{2.1}$ 유리의 적외선흡수에 관하여 연구했다. Lucovsky와 그의 연구팀이 제창훈 분자 모델에 의하면 8-20$\mu\textrm{m}$ 영역에서 위의 유리물질의 multiphonon 흡수대는 고립된 각 분자의 기본진동대의 overtone 및 combination과 같다. Lucovsky와 Galeener는 이이론에 입각하여 network 구조를 갖는 유리가 적외선 및 라만 스펙트럼에서 나타나는 multiphonon combination 과 overtone 진동수를 예언하는 실험적 선택룰을 제안했다 우리가 얻은 As2S3 및 GeS2.1 유리의 적외선 스펙트럼은 이 유리에 대해 적용한 위의 실험법칙과 잘 일치한다.

• Journal of the Korean Ceramic Society
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• v.38 no.7
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• pp.628-633
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• 2001

전자 패키징에 적용 가능한 저융점 유리 중에서 납성분이 포함되어 있지 않는 Bi계 유리의 연구를 행하였다. 기판과의 일체화를 위한 유리의 응용으로, 소자와의 반응 억제와 열응력 완화를 위해 유리의 저융점화 및 열팽창계수를 제어하였다. 본 연구에서 제조된 Bi계 유리는 DTA와 TMA의 열분석을 통해 5$50^{\circ}C$ 부근에서 연화점이 있고, 열팽창계수는 7.52~12.09$\times$$10^{-6}$/$^{\circ}C$의 범위였으며, 비유전율은 9~13이었다. 본 연구의 납성분을 포함되어 있지 않는 유리조성은 우수한 내산성을 나타내었다.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.29 no.4
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• pp.154-159
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• 2019

The glass-ceramic of $Li_2O-Al_2O_3-SiO_2$ system was fabricated by using yttrium oxide and iron oxide that it can reduce the melting temperature and affect the homogenization. Zirconium sulfate was used as a nucleation agent. Calcium phosphate was used to improve the flow the glass so as reduce the viscosity of the glass. The glass-ceramics met a thermal shock test of more than $750^{\circ}C$ and the temperature at which the coefficient of thermal expansion rapidly increased at over $800^{\circ}C$ was shifted by about the above $30^{\circ}C$. Therefore, it is concluded that the glass-ceramic of $Li_2O-Al_2O_3-SiO_2$ system with yttrium oxide and iron oxide was founded to have good melting conditions and excellent thermal expansion resistance at high temperature such as special field for kitchen utensils.