• Journal of the Microelectronics and Packaging Society
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• v.10 no.4
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• pp.61-64
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• 2003

The fractography was used to observe the stress profile on a single ion-exchanged glass. In the processing, the temperature was varied during the ion exchange, and then the stress profile on the single ion-exchanged glass was shifted from glass surface to slightly below the glass surface. The hackle mark and mirror surface were varied according to process conditions, and the glass strength was increased with increasing the number of hackle markers. In case of breaking the stress profile by using indenter, the breaking property was similar to the annealed glass.

• Journal of the Microelectronics and Packaging Society
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• v.9 no.3
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• pp.25-29
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• 2002

Single ion exchange process was used, and the ion exchange behavior and mechanical properties were investigated in substrate glass for flat panel display. In order to study the effects of ion exchange, ion exchange behavior with ion penetration depth, amount of ion exchange, density and thermal expansion was measured according to the time and temperature. The mechanical properties were evaluated by the three point bending test and curvature change, and then the fracture patterns were investigated by optical microscope.

• Current Photovoltaic Research
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• v.6 no.4
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• pp.124-132
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• 2018

The Korean electric power supply plan was prepared by greatly enhancing the environmental and safety with considering the economical efficiency of the electric equipment, the impact on the environment and the public safety. As a result, the fossil energy-based power generation sector is accelerating the paradigm shift to eco-friendly energy such as solar power and wind. Also the solar power industry is expected to grow into a super large-sized industry by converging the energy storage and electric vehicle industry. Generally, a levelized cost of electricity (LCOE) is used to calculate the power generation cost for different generation power generation efficiency, operating cost, and life span. In this paper, we have studied the future research and development direction of photovoltaic technology development for the era of massive utilization of photovoltaic solar power, and have studied the LCOE of major countries including China, USA, Germany, Japan and Korea. Finally we have reviewed USA and Japan research programs to reduce the LCOE.

• Defense and Technology
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• no.11 s.165
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• pp.26-33
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• 1992

국과연이 산.학.연에 지원하고 있는 기초연구사업의 2차년도 연구결과 발표회가 국과연 산학회관에서 10월27일부터 11월 4일까지 열렸습니다. 이번 발표회는 물리.광학.전기.전자, 화.공학, 수학.전산, 기계.항공, 해양.조선, 재료공학 등 7개 분과로 나뉘어 진행되었습니다. 국과연은 지난 91년 12월에 제1회 발표회를 가진바 있으며, 이번 네2회 발표회는 지난회의 48개 과제에 대한 중간 실적 평가와 함께 새로 선정된 29개 과제의 연구 결과 발표장이 되었습니다. 이에 이번호에는 사업평가에 관한 연구(총괄 p.p 26-33)와 함께 6개 부문별로 각각의 발표내용을 발췌하여 게재(p.p 34-45)합니다

• KOREAN POULTRY JOURNAL
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• v.38 no.6 s.440
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• pp.181-186
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• 2006

농림부 승진인사/ 한국축산환경기계협회-장동일 신임회장 취임/ (사)한국오리협회-인사변동 안내/ 농림부 · 국립수의과학검역원-영국산 가금 · 가금육 수입검역 잠정중단 조치 해제/ 덴마크산 가금 · 가금육 등 수입금지 조치 알림/ 농림부-삼계탕 · 오리고기 수출 '호조'/ 한국가금학회-춘계심포지움 개최/ 가축위생방역지원본부-1/4분기 농장방역실태점검 및 시료채취 결과/ 축산물등급판정소-'축산물등급판정 통계' 통계청 승인으로 공산력 확보/ 국립수의과학검역원-2006년 양계분야 협의회 1차 모임 가져/ 해외 악성가축전염병 발생동향 검토회의/ 동물약품 품질관리 향상을 위한 KVGMP업체 간담회 개최/ 수의전자현미경 도감 발간/가금수급안정위원회-오리데이 행상 개최/ 한국가축인공수정사협회-축산회관 입주/ 샴쌍둥이협회-샴쌍둥이 자선바자회

• Proceedings of the KAIS Fall Conference
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• 2000.10a
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• pp.169-172
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• 2000

본 실험에서는 광Link로 응용될 Core Glass와 Clad Glass 및 Clad용 Polymer의 조성을 개발하고, Core용 Glass 와 Clad용 Glass의 match 및 Core Glass와 Clad용 Polymer의 효과적으로 접합 성형하여 반도체제조 설비내의 모든 Data 송ㆍ수신 Link를 Optical Fiber로 대체하여 기존 전선케이블이 전자기장의 영향으로 인한 Noise 와 Data 송ㆍ수신 오류를 일으키는 것을 방지하고자 한다. 따라서, 이에 대한 연구로 우선 유리를 사용한 기초 실험을 실시하였다. 실험 과정에 있어서는 Batch 실험과 용해 실험 및 물성 측정을 통하여 최적 조건의 유리를 선정하였다. 제조된 모유리를 사용하여 유리의 열적, 기계적 성질을 측정하였다. 또한 Glass core/Glass clad 파이버를 제조하여 광학적성질, 기계적성질, 구조적 특성을 평가하였다.

• Journal of the Microelectronics and Packaging Society
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• v.11 no.2 s.31
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• pp.17-22
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• 2004

In this study, BNT($BaO-Nd_{2}O_3-TiO_2$) and $70P_{2}O_5-5B_{2}O_3-(25-x)BaO-xNa_{2}O$ glass-ceramic composites were fabricated and investigated in order to apply for low temperature cofired ceramic. The prepared BNT based glass-ceramic composites were sintered at $800{\sim}950^{\circ}C$ with the glass fit contents ranging from 10 to $15\;wt\%$. The properties such as sintering and dielectric property were investigated in the ceramic compositions according to the phosphate glass frit. The dielectric constant was varied between 10 to 40 and shrinkage rate was increased according to increasing glass frit.

• Journal of the Microelectronics and Packaging Society
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• v.12 no.2 s.35
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• pp.161-166
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• 2005

Glass formation, thermal property and crystallization behavior were investigated in $xK_2O-(33.3-x)BaO-16.7TiO_2-50SiO_2(mole\%)$ with fresnoite($Ba_2TiSi_2O_8$) crystal by replacement BaO for $K_2O$. As x(0$\le$x$\le$20) contents increased, glass formation became easy, and crystallization temperature moved on to the low temperature. Crystal phase of the $Ba_2TiSi_2O_8$ was confirmed by XRD, and the replaced x was not effected on the formation of new crystals. The kinetics of crystallization of fresnoite were studied by applying the DTA measurements carried out at different heating rates. The average avrami exponent(n) and activation energy were changed $2.26 {\pm}0.1,\;2.03 {\pm}0.1,\;1.93{\pm}0.15$, $279 {\pm}12kJ/mole,\;302{\pm}7kJ/ mole,\;319{\pm}1kJ/mole$ according to x contents, respectively. The replaced x improved the orientation of crystal growth.