• 제목/요약/키워드: Laminated Glass

검색결과 146건 처리시간 0.027초

Shrinkage Free Sintering of Low Temperature Cofired Ceramics by Glass Infilteration

  • Yeo, Dong-Hun;You, Jung-Hun;Shin, Hyo-Soon;Kim, Jong-Hee
    • 한국분말야금학회:학술대회논문집
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    • 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part2
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    • pp.1218-1219
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    • 2006
  • The shrinkage variation of Low Temperature Cofired Ceramics(LTCC) limits the size of the substrates that impose limitations on embedded passive components. This paper focuses on the method of minimizing or controlling planar shrinkage and reducing distortion during firing. The laminated sheets of alumina and glass were sintered at varying temperature, and depending on the amount of the glass ceramics. When the sintered of multi-layer structure with $Al_2O_3/Glass/Al_2O_3$, the glass infiltrated entirely into $Al_2O_3$ layer at the temperature of about $950^{\circ}C$ or higher.

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GFRP 보강적층판 및 GFRP rod를 이용한 낙엽송 집성재 문형라멘 구조의 수평가력 성능평가 (Lateral Load Performance Evaluation of Larch Glulam Portal Frames Using GFRP-Reinforced Laminated Plate and GFRP Rod)

  • 정홍주;송요진;이인환;홍순일
    • Journal of the Korean Wood Science and Technology
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    • 제44권1호
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    • pp.30-39
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    • 2016
  • 구조용 집성재 라멘 접합부에 일반적으로 사용되는 접합철물을 대신하여 단판과 Glass Fiber Reinforced Plastic (GFRP)를 복합시킨 GFRP 보강적층판과 삽입 접착형 GFRP rod를 접합물로 사용하여 낙엽송 집성재 문형라멘 구조의 수평가력 성능평가를 실시하였다. 실험결과 GFRP rod와 에폭시 접착제를 이용한 삽입 접착형 접합부는 기존의 접합철물을 이용한 실험체와 비교하여 항복내력, 종국내력, 초기강성이 각각 49%, 52%, 61% 낮게 측정되었다. 이러한 접합부는 GFRP rod와 집성재 간의 접착력이 중요한 내력 기구로 현장적용 시 문제가 발생할 수 있는 가능성이 크다고 판단된다. 반면, GFRP 보강적층판과 목재(Eucalyptus marginata)핀을 이용한 실험체는 집성재 슬릿 접합부의 단면적 손실이 큼에도 불구하고 항복내력, 종국내력, 초기강성, 소성률이 전부 3% 이내로 측정되었다. 게다가 사이클에 대한 강성변화율도 35%로 가장 낮게 측정되며 접합철물을 이용한 실험체와 거의 동등한 성능을 발휘한 것을 확인하였다.

Mechanical behaviour of a syntactic foam/glass fibre composite sandwich: experimental results

  • Papa, Enrico;Corigliano, Alberto;Rizzi, Egidio
    • Structural Engineering and Mechanics
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    • 제12권2호
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    • pp.169-188
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    • 2001
  • This note presents the main results of an experimental investigation into the mechanical behaviour of a composite sandwich conceived as a lightweight material for naval engineering applications. The sandwich structure is formed by a three-dimensional glass fibre/polymer matrix fabric with transverse piles interconnecting the skins; the core is filled with a polymer matrix/glass microspheres syntactic foam; additional Glass Fibre Reinforced Plastics extra-skins are laminated on the external facings of the filled fabric. The main features of the experimental tests on syntactic foam, skins and sandwich panels are presented and discussed, with focus on both in-plane and out-of-plane responses. This work is part of a broader research investigation aimed at a complete characterisation, both experimental and numerical, of the complex mechanical behaviour of this composite sandwich.

투명 방탄소재용 보로실리케이트 유리의 이온교환 강화 (Strengthening of Borosilicate Glass by Ion Exchange for Lightweight Transparent Bulletproof Windows Materials)

  • 심규인;엄형우;최세영
    • 한국군사과학기술학회지
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    • 제16권4호
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    • pp.507-513
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    • 2013
  • Transparent bulletproof windows play an important role in the munitions industry. The thickness of bulletproof windows including soda-lime silicate(SLS) glass, polyvinyl butyral, poly urethane, main defense(200MD), and safety film was reduced from 40mm to 29mm by adjustment of SLS glass laminated array. Borosilicate glasses generally have lower surface density and more excellent mechanical properties than SLS glass. Borosilicate glass was strengthened by ion exchange in the $KNO_3$ powder. The maximum mechanical properties were observed at $550^{\circ}C$ for 10min. The Vickers hardness, fracture toughness and 3-point bending strength of ion exchanged samples were about $775kg/mm^2$, $1.91MPa{\cdot}m^{1/2}$ and 764MPa each, which are about 27%, 149% and 249% higher than parent borosilicate glass, respectively. The penetration depth of K+ ion at $550^{\circ}C$ for 10min was $59.8{\mu}m$. As a result, the transparent bulletproof windows were predicted to be more lightweight by ion exchange of borosilicate glass. If the SLS glass for bulletproof windows is replaced by ion exchanged borosilicate glass, the bulletproof windows can be expected to be lightweight and thinner.

GFRP적층복합재료관의 신뢰성 해석 (Reliability Analysis of GFRP Laminated Composite Cylindrical Shells)

  • 조효남;이승재
    • 전산구조공학
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    • 제6권1호
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    • pp.117-125
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    • 1993
  • 일반적으로 복합재료 적층원통관의 강도와 강성은 세장모수, coupling 강성모수, 섬유배향각, 적층방법, 그리고 적층수 등의 변동성에 매우 민감하게 변화한다. 본 논문에서는 복합재료 적층원통관의 합리적인 신뢰성해석을 수행할 수 있는 강도 및 좌굴한계상태함수를 제안하고, 전술한 인자들이 GFRP(Glass Fiber Reinforced Plastic) 적층원통관의 강도 및 좌굴신뢰성에 미치는 영향을 고찰하였다. 이들은 복합재료 적층원통관의 강도 및 좌굴신뢰성에 매우 다양하고 복합적인 영향을 미치기 때문에 최적설계기법이나 설계규준의 개발등을 통하여 설계관련 인자들을 설계에 합리적으로 반영하므로서 실무에서 균형설계(Balanced Design)를 위한 일관성 있는 안전도/신뢰도의 확보가 가능하다고 사료된다.

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단열성능 개선을 위한 진공유리가 부착된 BIPV Module 개발에 관한 연구 (A Study on the Development of BIPV Module Equipped with Vacuum Glass for Improved Thermal Performance)

  • 엄재용;이현수;서승직
    • 한국태양에너지학회 논문집
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    • 제34권2호
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    • pp.44-52
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    • 2014
  • The main purpose of this paper is to develop the new BIPV module equipped with vacuum glass. Beacuse BIPV module has a function of architectural materials, thermal and PV performance should be simultaneously evaluated. To improve the thermal performance of BIPV module, this study developed BIPV module equipped with a vacuum glass. Those BIPV module was tested with a variety of encapsulants. The results are as follows. When a vacuum glass is laminated with EVA or PVB, it was broken. The reason seems to be bending by unbalance of heat expansion with center and edge of vacuum glass. In case of lamination with resin, there is no breakage and no bending of vacuum glass. Because production was conducted in low pressure & low temperature conditions. And it was also found that vacuum glass does not interfere with the UV curing process.

다축 구조 S-2 유리섬유 복합재의 충격 특성 (Impact Properties of S-2 Glass Fiber Composites with Multi-axial Structure)

  • 송승욱;이창훈;변준형;황병선;엄문광;이상관
    • 한국복합재료학회:학술대회논문집
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    • 한국복합재료학회 2005년도 춘계학술발표대회 논문집
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    • pp.71-75
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    • 2005
  • For the damage tolerance improvement of conventional laminated composites, stitching process have been utilized for providing through-thickness reinforcements. 2D preforms were stacked with S-2 glass plain weave and S-2 glass MWK (Multi-axial Warp Knit) L type. 3D preforms were fabricated using the stitching process. All composite samples were fabricated by RTM (Resin Transfer Molding) process. To examine the damage resistance performance the low speed drop weight impact test has been carried out. For the assessment of damage after the impact loading, specimens were examined by scanning image. CAI (Compressive After Impact) tests were also conducted to evaluate residual compressive strength. Compared with 2D composites, the damage area of 3D composites was reduced by 20-30% and the CAI strength showed 5-10% improvement.

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Glass-Al2O3 복합소재를 원료로 한 LTCC 다층회로 기판의 제조 (Fabrication of LTCC Multi-layer Circuit Board made of Glass-Al2O3 Composites)

  • 곽훈;전형도;김환;이원재;신병철;김일수
    • 한국전기전자재료학회논문지
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    • 제21권6호
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    • pp.509-516
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    • 2008
  • Multi-layer circuit card for semiconductor inspection was fabricated by LTCC technology. After a proper impedance design without electrical interference, ceramic tapes with the composition of $CaO-Al_2O_3-SiO_2-B_2O_3$ glass and $Al_2O_3$ were prepared. The electrode with silver paste printed on the tape. Printed ceramic sheets were then laminated and sintered. Densities and dielectric properties were measured. The microstructure, fracture surface of the region of via and matching state of substrate-electrode were observed. The durability of plated outside electrode were examined by hardness and scratch test.

태양전지모듈용 저철분 투과 유리의 광특성 평가 (The Optical Characteristics of Low Iron Glass for Photovoltaic Module Fabrication)

  • 김경수;강기환;유권종
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2008년도 제39회 하계학술대회
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    • pp.1114-1115
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    • 2008
  • In this paper, we study the optical characteristics of low iron glass for photovoltaic modules fabrication. Tow types of glasses are examined by optical transmittance and reflection measurement. Also, by making laminated glass, we analyze the difference between glass maker. Mini-PV module is fabricated to compare optical reflectance through lamination process. Anti-reflection and catalyst-coated glasses are suggested for advanced technology to obtain high electrical generation output. The specific analysis is shown in the following paper.

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SENT시험편을 이용한 CFRP/GFRP 하이브리드 적층재의 노치선단부 변형률 평가 (The Strain Evaluation of the Notch tip Area for the CFRP/GFRP Hybrid Laminate Plate using the SENT Specimen)

  • 강지웅
    • 한국안전학회지
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    • 제29권5호
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    • pp.15-21
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    • 2014
  • The aim of this work is conduct the study on light weight and structural performance improvement of the composite wind power blade. GFRP (Glass Fiber Reinforced Plastic) pre-empted by CFRP(Carbon Fiber Reinforced Plastic), the major material of wind power blade, was identified the superiority of mechanical performance through the tensile and fatigue test. SENT(Single Edge Notched Tension) specimen fracture test was conducted on the specimen that laminated together 2 ply CFRP with 4 ply GFRP through DIC(Digital Image Correlation) analysis. The SENT specimen thickness and $a_0/W$ ratio is 1.45 mm and 0.2, respectively. The fracture test accomplished with displacement control with 0.1 mm/min at the room temperature. The experimental apparatus used for the fracture test consisted of a 50kN universal dynamic tester and CCD camera connected to a personal computer (PC), which was used to record images of the specimen surface. Following data acquisition, the images and load-displacements were transferred to the PC, on which the DIC software was implement. The experiment and DIC analysis results show that CFRP/GFRP laminated composite exhibits improvement of the strength, compared with that of the existing blade material. This study shows the result that the strength of CFRP rotor blade of wind turbine satisfies through the experimental and DIC method.