• 한국표면공학회지
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• 제40권5호
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• pp.241-244
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• 2007

$MgF_2$/Cr/$MgF_2$, $MgF_2$/Cu/$MgF_2$ and $MgF_2$/Al/$MgF_2$ multi-layered thin films were fabricated by evaporation system. $MgF_2$ and Cr(Cu, And Al) was selected as a low refractive index material and mid reflector layer, respectively. Optical properties including color effect were systematically studied in terms of different film layer by using spectrophotometer. Experimental results were compared to the simulation result. The films consistings of $MgF_2$/Cr/$MgF_2$, $MgF_2$/Cu/$MgF_2$, $MgF_2$/Al/$MgF_2$ multi-layered thin films showed wavelength range of $430{\sim}780nm$, typically color range between greenish yellow and orange at view angle of $45^{\circ}$. It was confirmed that this experimental result was well matched with simulation result.

• 한국세라믹학회지
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• 제24권3호
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• pp.277-281
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• 1987

The various contents of MgF2 from 0 to 12.5wt% are studied in the AlF3-(Mg＋Sr＋Ba)F2-P2O5 system for the effects of various properties in glasses and the atmosphere of melting was controlled by N2 and Ar gas respectively. Density, refractive index, infrared transmission, thermal conductivity and thermal expansion coefficient of glasses are determined. Density, refractive index and thermal conductivity are decreased, micro-hardness and thermal expansion coefficient are increased according to the increasing of MgF2 contents. Infrared transmittance decreases with increasing the MgF2 contents and it slightly dropped by air than N2 and Ar atmosphere. Other properties are not influenced by atmosphere control.

• 한국식품영양과학회지
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• 제5권1호
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• pp.25-30
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• 1976

본연구(本硏究)에서는 한우유(韓牛乳)와 Holstein cow milk의 단백질(蛋白質)을 Zone electrophoresis에 의하여 분석(分析)하여 그 결과(結果)를 다음과 같이 얻었다. (1) 한우유(韓牛乳)와 Holstein cow milk의 이화학적(理化學的) 성질(性質)이 Table 1, Table 2에 나타나 있다. (2) 한우유(韓牛乳)의 유청단백질(乳淸蛋白質)의 단백질(蛋白質) 분포(分布)는 Lactoalbumin 1.74mg %, Alpha-1 globulin 1.19mg%, Alpha-2 globulin 0.68mg %, Beta globulin 2.57mg %, Gamma globulin 0.93mg %이었다. (3) Holstein cow milk protein의 단백질(蛋白質) 분포(分布)는 Lactoalbumin 1.23mg %, Alpha-1 globulin 1.93mg %, Alpha-2 globulin 0.86mg %, Beta globulin 2.56mg %, Gamma globulin 1.74mg %를 얻었다. (4) 한우(韓牛)(female)와 Holstein cow(male)와의 교잡종인 F-1인 유청단백질(乳淸蛋白質) 분포(分布)는 Lactoalbumin 1.30mg %, Alpha-1 globulin 1.58mg %, Alpha-2 globulin 2.46mg %, Beta globulin 1.39mg %이었고 F-2의 그것은 Lactoalbumin 1.57mg %, Alpha-1 globulin 1.74mg %, Alpha-2 globulin 2.19mg %, Beta globulin 1.17mg %, F-4에서는 Lactoalbumin 2.46mg %, Alpha-1 globulin 1.24mg %, Alpha-2 globulin 1.57mg %, Beta globulin 1.74mg %를 각각(各各) 얻었다.

• 한국세라믹학회지
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• 제24권2호
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• pp.117-122
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• 1987

Glass forming ranges in the AlF3-(Mg＋Sr＋Ba)F2-P2O5 system are studied and ultraviolet transmission, infrared transmission, coefficient of refractive index, thermal expansion coefficient, density and chemical durability of the glasses are determined. Glass forming range is restricted MgF2 0-10wt%, SrF2 10-50wt%, BaF2 10-40wt% in this system. While BaF2 is substituted by SrF2, density and refractive index are decreased, micro hardness and thermal expansion coefficient are increased according to the increasing of SrF2 at fixed MgF2 contents. These samples represent high transmittance(93%) from 400nm to 3800nm and chemical durability of these samples show less than 0.3mg/$\textrm{cm}^2$$.$hy by weightloss.

• 한국광학회지
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• 제8권5호
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• pp.382-386
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• 1997

MgF$_{2}$와 TiO$_{2}$를 각각 다른 두 증발원으로부터 동시에 증착시켜 혼합 박막을 제작하였다. 박막의 특성을 개선시키기 위해 이온 보조 증착(IAD)을 하였다. 제작된 MgF$_{2}$-TiO$_{2}$ 혼합 박막의 원소 조성비, 광학적 특성과 결정 구조를 분석하였다. 상대적 증착률을 달리하여 제작된 MgF$_{2}$-TiO$_{2}$ 혼합 박막의 Mg:Ti의 조성비는 비선형적으로 변화하였으며, MgF$_{2}$의 조성비를 상대적으로 증가시킴에 따라 혼합 박막의 굴절률은 감소하였고 Drude 모델을 잘 만족함을 알 수 있었다. 그리고 MgF$_{2}$의 조성비가 증가할수록 비정질인 TiO$_{2}$ 구조 사이에 다결정질인 MgF$_{2}$의 양이 증가하여 결정성을 갖는 박막으로 성장함을 확인하였다.

• 한국세라믹학회지
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• 제33권3호
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• pp.299-306
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• 1996

We invesgated the fesibility of thin films deposition by pyrolysis of metalorganic precursors using chemical beam deposition (CBD) process. We attempted to understand the effects of deposition variables such as substrate temperature operating pressure effusion cell temperature and H2 partial pressure on the properties of MgF2 grown by CBD. Mg(tfac)2 was used as a precursor. MgF2 thin films were always grown in an amorphous state and crystallized bypost-annealing. he higher the substrate temperature and the lower the operating pressure the less the impurities I the deposited MgF2 thin films. H2 gas has to be supplied for the pyrolitic reaction of Mg(tfac)2 decomposition. MgF2 films annealed in H2 have lower C impurity than those annealed in O2. But their crysatllinity was independent of annealing atmosphere. The optimum conditions for the prepara-tion of MgF2 films by CBD process were as following : The substrate temperature 55$0^{\circ}C$ the operating pressure 10-4 torr; effusion cell temperature 21$0^{\circ}C$ the percentage of H2 100% Post-annealing in H2 gas was required to remove residual carbon and to form MgF2 crystalline phase.

• Nuclear Engineering and Technology
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• 제2권4호
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• pp.269-272
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• 1970

순도 99.98%의 LiF 분말에서 열형광을 검출하였으며 이 때 glow curve의 Peak는 12$0^{\circ}C$, 22$0^{\circ}C$ 및 30$0^{\circ}C$에 있다. 이 LiF 분말에 중량비로 2%(mol 비로 4%)의 MgC1$_2$를 첨가하여 소결시킨 LiF 분말은 비약적으로 강한 열형광을 발휘하였으며 그 flow curve의 특성이 상세하게 조사되었다. 열형광선량계로서 이용되고 있는 LiF는 Mg, Mn 등의 불순물에 의한 전자 trap을 가지고 있는 것이 알려져 있으며 이 실험결과는 이들 불순물중의 하나인 Mg가 확실히 LiF의 결정내에 확신된 것을 시사한다. 소결시간의 효과를 glow curve에서 명확하게 검출하였고 또한 원료인 MgC1$_2$도 열형광을 발휘한다는 것이 이 glow curve를 얻음으로써 확인되었다.

• 한국세라믹학회지
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• 제24권4호
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• pp.321-328
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• 1987

The chemical durability of six alumino fluorophosphate glass samples studied. The composition of glass varied with MgF2 content from 0 to 12.5wt% in 30AlF3-2MgF2-(50-x)MF2-10P2O5(M; Sr, Ba). Samples were maintained in distilled water at 95$^{\circ}C$ from 1 to 100hrs. Weight loss, pH change and leached elements of the solution, and IR transmittance of samples were measured and also their surfaces were observed by SEM. Chemical durabilities of these samples were increased with increasing MgF2 contents. The following various properties were increased rapidly up to 10 hours after that changed slowly. The sample after leached at 95$^{\circ}C$ during 100 hrs showed 0.5mg/$\textrm{cm}^2$ in weight loss. The pH of leached solution is 6.2 and concentration of Mg, Sr, and Ba element of that leached solution were 24,115 and 125 ppm, respectively. The infrared transmittance of leached sample decreased 7% compare to unleached one. And also SEM photomicrograph and EDS analysis showed that the corrosion of samples were decreased with respect to increasing MgF2 content.

• 한국세라믹학회지
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• 제33권6호
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• pp.653-659
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• 1996

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.899-901
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• 2009

The magnesium fluoride ($MgF_2$) has very higher optical transmission than oxide or nitride material applied for gas barrier, so we manufactured Mg-Zn-F films with Mg-Zn-F target mixed in the various ratio of $MgF_2$ to Zn and characterized films' properties. Zn is used to increase packing density of barrier film. Thickness and optical transmission of Mg-Zn-F are 200 nm and over 90 %, respectively. The result of water vapor transmission rate at 38, RH 90 ~ 100% of the Mg-Zn-F film deposited with 4 : 6 ($MgF_2$ : Zn) ratio target reached below $1{\times}10^{-3}g$/($m^2{\cdot}day$), measuring limit of instrument.