• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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• pp.1656-1659
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• 2008

The reflective type color filter for the liquid crystal displays (LCD) was produced using cholesteric liquid crystal monomers whose phase is characterized by the unique optical features of selective reflection. Periodic micrometer scale hemi-spherical photoresist (PR) patterns were formed on glass substrates by thermal reflow method after photolithography. Cholesteric color filter films for red, green and blue light reflections were then produced and the viewing angle dependence was investigated and compared with that of reflected light on the non-patterned substrates.

• 한국의류학회지
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• 제34권2호
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• pp.318-335
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• 2010

This study is to enhance the competitiveness of the domestic cosmetic industry and provide basic materials needed for a design idea by analyzing perfume bottles designed by Rene Lalique. The methods of this study are documentary research and demonstrative research. The documentary research considered the theoretical background with a focus on related domestic and international literature, previous research, and Internet materials. The demonstrative research extracted photo materials of the bottle designs of Lalique from domestic and international web sites along with literature that classified them into shapes, colors, materials, and patterns that analyzed the general characteristics and chronologic changes. The results of this study are as follows. The curve-oriented shape was common and multi-colors were used more frequently than a single color in the 1910's. Colorless-transparent glass and a flower patterns were used frequently for materials and patterns, respectively. Lalique reflects this style in his bottle designs because the Art Nouveau effect in the 1910's. In the 1920's, curved and straight shapes had a similar percentage. The use of multi-colors and one type of glass bottle increased versus the 1910's. Similar to the 1910's, a flower pattern was used most frequently. This suggests that Lalique was influenced by the established Art Nouveau and was also interested in the Art Deco style, In the 1930's, an organic curved shape was common. Unlike the 1910's and 1920's, a single color was more common than multi-colors. The one type of glass bottle and a geometric pattern were common for materials and patterns, respectively. The Art Deco style was reflected in the bottle design of Lalique in the 1930's.

• 한국재료학회지
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• 제23권5호
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• pp.271-275
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• 2013

Cobalt (Co) compounds have been used for centuries to impart rich blue color to glass, glazes and ceramics. Cobalt monoxide (CoO), an oxide of Co, is an inorganic compound that has long been used as a coloring agent in the ceramic industry. Unlike other coloring agents, CoO can be used to develop colors other than blue, and several factors such as its concentration in the glaze and firing condition have been suggested as possible mechanisms. For example, CoO produces a typical blue color called "cobalt blue" at very low concentrations such as 1 wt% in both oxidation and reduction firing conditions; a higher concentration of CoO (5 wt%) develops a darker blue color under the same firing conditions. Interestingly, CoO also develops a purple color at high concentrations above 10 wt%. In this study, we examined the applicability and mechanism of a novel purple glaze containing cobalt(II, III) oxide, one of the well characterized cobalt oxides. Experimental results show that an Augite crystal isoform (Augite-Fe/Co) in which Fe was replaced with Co is the main component contributing to the formation of the purple color. Based on these results, we developed a glaze using chemically synthesized Augite-Fe/Co crystal as a color pigment. Purple color glaze was successfully developed by the addition of 6~15 wt% of $Co_3O_4$ to magnesia lime.

• 박물관보존과학
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• 제15권
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• pp.26-37
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• 2014

국립중앙박물관 보존과학부에서는 국보 제193호 봉수형유리병의 구조적 안정성을 향상시키고 봉수형유리병 본연의 색과 투명도를 되살리기 위하여 재보존처리를 하기로 하였다. 재보존처리에 앞서 유리 재질 보존에 적합한 재료를 선정하기 위하여 에폭시 수지, 아크릴 수지, 광경화성 수지, 물유리에 대한 재료 실험을 하였다. 이 결과 접착제로는 시아노아크릴레이트 수지, 아크릴 수지, 광경화성 수지가, 복원 재료로는 아크릴 수지가 적합할 것으로 판정되었다. 단, 사용 방법에 있어 시아노아크릴레이트 수지는 단독 사용을 피하고 에폭시 수지는 착탈식으로 보존처리해야 한다.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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• pp.913-918
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• 2005

It is expected that the inkjet technology offers prospect for reliable and low cost manufacturing of FPD (Flat Panel Display). This inkjet technology also offers a more simplified manufacturing process for various part of the FPD than conventional process. For example, recently the novel manufacturing processes of color filter (C/F) in LCD, or RGB patterning in OLED by inkjet printing method have been developed. This elaborates will be considered as the precious point of manufacturing process for the mass production of enlarged-display panel with a low price. On this point of view, we would like to review the status of inkjet technology in FPD, with some results on forming micro line by inkjet patterning of suspension type silver nano ink as below. We have studied the inkjet patterning of synthesized aqueous silver nano-sol on interface-controlled ITO glass substrate. Furthermore, we designed the conductive ink for direct inkjet patterning on bare ITO glass substrate. The first, the highly concentrated polymeric dispersant-assisted silver nano sol was prepared. The high concentration of batch-synthesized silver nano sol was possible to 40 wt%. At the same time the particle size of silver nanoparticles was below $10{\sim}20nm$. The second, the synthesized silver nano sol was inkjet - patterned on ITO glass substrate. The connectivity and width of fine line depended largely on the wettability of silver nano sol on ITO glass substrate, which was controlled by surfactant. The relationship was understood by wetting angle. The line of silver electrode as fine as $50{\sim}100\;{\mu}m$ was successfully formed on ITO glass substrate. The last, the direct inkjet-patternable silver nano sol on bare ITO glass substrate was designed also.

• 한국결정성장학회지
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• 제31권2호
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• pp.84-88
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• 2021

레이저, 광학센서 등에 사용되고 있는 La2O3-CaF2-Al2O3-SiO2 계 유리에 희토류 물질을 첨가하였을 때, 열처리 온도에 따른 결정화유리의 발광 특성 변화에 대하여 연구하였다. 결정화유리를 얻기 위한 열처리 조건은 비등온 열분석을 통해 얻었으며, 열처리 온도에 따른 결정성장 정도 및 생성된 결정상 종류를 파악하기 위해 XRD 분석을 진행하였다. Scherrer's equation을 이용한 결과, 결정화유리 내부에 25~40 nm 크기의 결정들이 생성된 것으로 계산되었다. Photoluminescence (PL) 분석결과, 660~670℃에서 1시간 열처리 된 시편이 가장 우수한 PL 강도를 보였으며, CIE 색좌표계 분석결과, 열처리 유무와 관계없이 모든 결정화유리 시편들은 red-orange 빛을 발광하는 것으로 나타났다.

• 박물관보존과학
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• 제31권
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• pp.21-37
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• 2024

본 논문은 중심 연대가 5세기로 추정되는 고령 지산동 73~74호분에서 출토된 유리구슬 43점의 미세구조를 관찰하고 화학 조성을 분석하여 대가야 유리 문화를 이해하고자 하였다. 가시적 특징 및 미세구조는 실체현미경과 전자현미경으로 관찰하고 화학 조성은 전자현미경에 부착된 에너지분산형분광기로 분석하였다. 분석 결과, 고령 지산동 유리구슬은 늘인 기법, 주조 기법, 접은 기법 등 다양한 성형 기법이 확인되며 대다수는 늘인 기법에 의해 성형된 것으로 확인되었다. 화학 조성은 포타쉬유리군 32.6%, 소다유리군 67.4%로 소다유리군이 우세하게 나타나며 소다유리군는 고알루미나유리, 네트론유리, 식물재유리 등으로 다양한 융제가 사용된 것으로 판단된다. 이와 같은 고대유리의 조성은 동일 시기의 백제문화권과 비교하여 포타쉬유리군의 점유율이 높은 특징을 보인다. 이는 한국 고대유리 문화가 포타쉬유리군에서 소다유리군으로 변화하였으나 지역 및 문화권에 따라 차이가 있음을 보여준다. 소다유리군는 고알루미나유리가 23.3%, 네트론유리가 43.0%, 식물재유리가 1.2%로 네트론유리가 우세하게 나타났다. 그러나 한국 소다유리의 주된 유형은 고알루미나유리이고 유리 용기, 금박구슬, 연주옥을 제외한 네트론유리와 식물재유리의 출현 시기가 늦은 편으로 알려져 있는 점과는 상반된 결과로 지산동 출토 유리구슬에 대한 과학적 분석 결과는 한반도의 고대유리의 유입과 변천에 대한 중요한 단서를 제공할 수 있을 것으로 기대할 수 있다. 발굴조사에서 순차적으로 조영된 것으로 확인된 73, 74, 74-1호분은 조영 시기에 따른 유리구슬의 조성은 크게 차이가 나타나지 않는다. 또한, 신분 계급에 따른 차등 사용에 대한 근거도 확인되지 않는다. 다만, 유리의 화학 조성은 색상과 밀접한 관련을 보이는 것으로 판단된다.

• 대한치과보철학회지
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• 제38권5호
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• pp.595-605
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• 2000

Dental ceramics have good aesthetics, biocompatibility, low thermal conductivity, abrasion resistance, and color stability. However poor resistance to fracture and shrinkage during firing process have been limiting factors in their use, particularly in multiunit ceramic restorations. A new method for making all-ceramic crowns that have high strength and low processing shrinkage has been developed and is referred to as the Vita In-Ceram method. This study was performed to investigate the effect of $CeO_2$ addition in borosilicate glasses on the strength of alumina-glass composites. Porous alumina compacts were prepared by slip casting and sintered at $1,100^{\circ}C$ for 2 hours. Dense composites were made by infiltration of molten glass into partially sintered alumina at $1,140^{\circ}C$ for 4 hours. Specimens were polished sequentially from #800 to #2000 diamond disk. and the final surface finishing on the tensile side was received an additional polishing sequence through $1{\mu}m$ diamond paste. Biaxial flexure test was conducted by using ball-on-three-ball method at a crosshead speed of 0.5mm/min. To examine the microstructural aspect of crack propagation in the alumina-glass composites, Vickers-produced indentation crack was made on the tensile surface at a load of 98.0 N and dwell time of 15 sec, and the radial crack patterns were examined by an optical microscope and a scanning electron microscope. The results obtained were summarized as follows; 1. The porosity rates of partially sintered alumina decreased with the rising of firing temperature. 2. The maximum biaxial flexure strength of 423.5MPa in alumina-glass composites was obtained with an addition of 3 mol% $CeO_2$ in glass composition and strength values showed the aspect of decrease with the increase of $CeO_2$ content. 3 The biaxial flexure strength values of alumina-glass composites were decreased with rising the firing temperature. 4. Observation of the fracture surfaces of alumina-glass composites indicated that the enhancement of strength in alumina-glass composites was due to the frictional or geometrical inter-locking of rough fracture surfaces and ligamentary bridging by intact islands of materials left behind the fracture front.

• The Journal of Korean Physical Therapy
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• 제14권3호
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• pp.1-23
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• 2002

Purpose: The purpose of this study was to examine the relationship between pigmental reaction and blood components, such as white blood cell (WBC), lymphocyte, monocyte, red blood cell (RBC), hemoglobin, mean corpuscular index (mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH) and mean corpuscular hemoglobin concentration (MCHC)), hematocrit, platelet and neutrophil segment, after Cupping Glass Therapy (CGT). Subjects: Twenty-five healthy adults participated in this study; Methods: Subjects had undergone CGT for 5 days and were divided into two groups (dark color (DCG) and light color (LCG)) depending the level of pigmental reaction. Blood was collected from each subject at the beginning of this study and recollected after 5 day s'CGT. Results: The percentage of lymphocytes was higher in LCG than in DCG after CGT (p<.01) and was significantly increased in LCD after CGT (p<.01), The number of RBC was more in DCG than in LCG both before (p<.01) and after CGT (p<.05). The amount of hemoglobin was more in DCG than in LCG both before (p<.01) and after CGT (p<.01) and was significantly increased in LCD after CGT (p<.01). Mean corpuscular index showed that both MCH (p<.05) and MCHC (p<.01) were higher in DCG than in LCG after CGT, but only MCHC before CGT (p<.01). It also showed either decreased MCV (p<.01) or increased MCHC in LCD after CGT (p<.01). Hematocrite was higher in DCG than in LCG both before (p<.01) and after CGT (p<.01). The percentage of neutrophil segments was higher in BCG than In LCG after CGT (p<.01) and was significantly decreased in LCD after CGT (p<.05). However, neither the number of WBC and platelets nor the percentage of monocytes was significantly different between DCG and LCG either before or after CGT. Conclusion: Pigmental reaction was significantly related to the changes of blood conponents after CGT. The results of this study suggest that CGT may have an effect on the components of blood cells.

• 농업생명과학연구
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• 제45권1호
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• pp.59-66
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• 2011

본 연구는 화병의 재질과 절화보존제 처리 여부가 절화의 화색, 엽색, 그리고 화경에 미치는 영향을 구명하기 위해 조사하였다. 절화 장미 (Rosa hybrida) 'Aqua'와 'Corvernet' 및 거베라 (Gebera jamesonii) 'Honeymoon'과 'Golden Time'을 수돗물 또는 절화보존제 용액이 들어있는 유리, 자기 및 옹기 화병에 꽂고 화색, 엽색, 최대화경의 변화를 측정하였다. 처리 8일 후 화색에 있어서 장미 'Aqua'의 ${\Delta}E$값은 옹기와 자기화병의 보존제 처리에서 작게 나타났다. 장미 'Covernet'은 옹기화병의 보존제 처리에서 ${\Delta}E$값이 가장 작았고, L값도 처리 직전의 꽃잎 (대조구)과 가장 근접하였다. 거베라 'Honeymoon'의 경우 절화보존제 처리와 옹기화병에 의해 ${\Delta}E$값이 가장 작게 나타났고, a와 b값도 58.81, 34.29로 대조구와 가장 유사하였기 때문에 옹기화병에 꽂은 절화의 화색이 처리 직전의 화색과 유사하였다. 거베라 'Golden Time'의 ${\Delta}E$값은 옹기화병이 자기나 유리화병보다 크게 작았는데, a값은 옹기화병의 보존제 처리에서 -7.81로 가장 근접하였고, b값 역시 옹기화병에서 높게 나타났다. 장미의 엽색에 있어서는 옹기화병의 보존제 처리에서 L, a, b값이 처리 직전의 잎과 가까웠고 ${\Delta}E$값은 옹기화병에서 3.25로 나타나 자기나 유리에 비해 작았다. 화경은 장미 'Covernet'과 거베라 'Golden Time' 모두 옹기의 보존제 처리에서 크게 나타났다. 이상의 결과로 보존용액에 절화보존제를 첨가함으로써 미생물 번식을 감소시켜 절화수명이 연장되어 장미와 거베라의 품질 및 신선도를 증가시킬 수 있고, 다공질의 옹기 화병을 사용하여 통기성을 증가시키면 화색과 엽색을 좀 더 좋게 하고, 화경도 증가시킬 수 있을 것으로 판단된다.