http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
압출공정에 의한 수 처리용 평관형알루미나 필터의 미세구조와 특성평가
배병서,하장훈,송인혁,Bae, Byung-Seo,Ha, Jang-Hoon,Song, In-Hyuck 한국세라믹학회 2014 한국세라믹학회지 Vol.51 No.5
In this study, flat-tubular-type alumina filters were manufactured using alumina powder of two sizes ($2.4{\mu}m$ ALM-44 and $0.4{\mu}m$ AP 400) by an extrusion process. The manufactured alumina filter was sintered at $1200-1600^{\circ}C$ for 1 h. As particle size increased, the largest pore size, average pore size and porosity increased; but density and linear shrinkage decreased. The alumina filter fabricated using ALM-44 powder sintered at $1500^{\circ}C$ was confirmed as the best water treatment filter after investigation of the bending strength, water permeability and impurity-removal efficiency of the experimental filters. This flat-tubular-type alumina filter is expected to be useful not only for direct water treatment, but also for use as a support filter during coating processes, to control pore size.
실리카 분말이 코팅된 수처리용 규조토계 세라믹 필터의 특성평가
배병서,하장훈,송인혁,한유동,Bae, Byung-Seo,Ha, Jang-Hoon,Song, In-Hyuck,Hahn, Yoo-Dong 한국분말야금학회 2014 한국분말재료학회지 (KPMI) Vol.21 No.1
In this study, diatomite based materials were investigated as a support filter for silica particle coating. The silica sol for coating was synthesized by a st$\ddot{o}$ber process. The diatomite support was dry-pressed at 10 MPa and sintered at $1200^{\circ}C$ for 1 hour. The coating sol was prepared as a mixture of EtOH and silica sol. The diatomite support was coated by a dip-coating process. Silica coated diatomite filter was sintered at $1000{\sim}1200^{\circ}C$ for 1 hour. The largest pore size was decreased with increasing concentration ratio of coating sol. The gas and water permeability of silica coated diatomite decreased with increasing of concentration ratio of the coating sol.
정규진,김진호,이윤기,황종희,배병서,김선욱,Jeong, Gyu Jin,Kim, Jin Ho,Lee, Younki,Hwang, Jonghee,Toda, Kenji,Bae, Byoungseo,Kim, Sun Woog 한국결정성장학회 2020 한국결정성장학회지 Vol.30 No.2
본 연구에서는 밝고 화사한 적색 및 황색의 착색 특성을 가지며, 우수한 발광특을 가진 새로운 무기 형광 안료를 개발하기 위하여, A<sub>3</sub>V<sub>5</sub>O<sub>14</sub> (A = K and Rb) 및 Cs<sub>2</sub>V<sub>4</sub>O<sub>11</sub>를 water assisted solid state reaction(WASSR) 방법과 고상법을 혼합하여 합성을 하였다. 합성한 A<sub>3</sub>V<sub>5</sub>O<sub>14</sub> (A = K and Rb ) 및 Cs<sub>2</sub>V<sub>4</sub>O<sub>11</sub> 샘플은 AVO<sub>3</sub> 및 AV<sub>3</sub>O<sub>8</sub> (A = K, Rb and Cs)가 불순물로 다소 확인되었으나, trigonal 구조의 A<sub>3</sub>V<sub>5</sub>O<sub>14</sub> (A = K and Rb)와 orthorhombic 구조의 Cs<sub>2</sub>V<sub>4</sub>O<sub>11</sub>가 주상으로 확인되었다. A<sub>3</sub>V<sub>5</sub>O<sub>14</sub> (A = K and Rb)와 Cs<sub>2</sub>V<sub>4</sub>O<sub>11</sub>는 자외선 영역에서 강한 광흡수를 나타내었으며, 각각 적색광 및 녹색광 발광을 나타내었다. 또한, 합성된 A<sub>3</sub>V<sub>5</sub>O<sub>14</sub> (A = K and Rb)는 a* 값 (+ : 적색도, -: 녹색도)은 각각 + 35.5와 + 45.9를, Cs<sub>2</sub>V<sub>4</sub>O<sub>11</sub>는 b* 값(+: 황색도, -: 청색도)는 + 50.3을 나타내었으며, 45 이상의 L* 값(명도)을 가지고 있어, 밝고 화사한 느낌을 구현하기위한 황색안료로 응용이 가능할 것으로 기대된다. To develop the bright-vivid red- and yellow-inorganic fluorescent pigments with high luminescence properties, A<sub>3</sub>V<sub>5</sub>O<sub>14</sub> (A = K and Rb) and Cs<sub>2</sub>V<sub>4</sub>O<sub>11</sub> inorganic pigments were synthesized by a water assisted solid state reaction (WASSR) method and a conventional solid state reaction method. Although impurity peaks corresponding to the AVO<sub>3</sub> and AV<sub>3</sub>O<sub>8</sub> (A = K, Rb, and Cs) were observed in all samples prepared, the trigonal structure A<sub>3</sub>V<sub>5</sub>O<sub>14</sub> (A = K and Rb) and orthorhombic structure Cs<sub>2</sub>V<sub>4</sub>O<sub>11</sub> were successfully obtained as a main phase. These inorganic pigments showed the broad absorption band (under 550 nm) originated from CT transitions of VO<sub>4</sub> polyhedron, and the strong broad red- and green-emission bands due to <sup>3</sup>T<sub>2</sub> → <sup>1</sup>A<sub>1</sub> and <sup>3</sup>T<sub>1</sub> → <sup>1</sup>A<sub>1</sub> transitions of the [VO<sub>4</sub>]<sup>3-</sup> group. The A<sub>3</sub>V<sub>5</sub>O<sub>14</sub> (A = K and Rb) and Cs<sub>2</sub>V<sub>4</sub>O<sub>11</sub> pigments showed a bright-vivid red- and yellow-body color, where the a* values of the A<sub>3</sub>V<sub>5</sub>O<sub>14</sub> (A = K and Rb) were +35.5 and +45.9, respectively, and b* value of Cs<sub>2</sub>V<sub>4</sub>O<sub>11</sub> pigments was +50.3. The L* values of the A<sub>3</sub>V<sub>5</sub>O<sub>14</sub> (A = K and Rb) and Cs<sub>2</sub>V<sub>4</sub>O<sub>11</sub> inorganic pigments were over +45. These results indicate that the A<sub>3</sub>V<sub>5</sub>O<sub>14</sub> (A = K and Rb) and Cs<sub>2</sub>V<sub>4</sub>O<sub>11</sub> inorganic pigments could be an attractive candidate as a bright-vivid red- and yellow inorganic pigments.
하명규,한경림,정재선,배종성,정의덕,홍경수,배병서,배동식,양호순 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.61 No.6
Trivalent europium-ion-doped Y<sub>2</sub>SiO<sub>5</sub> phosphors are synthesized by using the reverse micelle and the sol-gel processes. The crystallinity, morphology, and chemical states of the ions are characterized, and the photophysical properties are studied by taking absorption, excitation, and emission spectra for various concentrations of europium. Y<sub>2</sub>SiO<sub>5</sub>:Eu<sup>3+</sup> is a red-emitting phosphor, has a higher efficiency for operation under near UV excitation, and may be a promising candidate for photonic applications.
벽지의 방염특성을 개선하기 위한 유-무기 하이브리드 코팅 용액 개발
정규진,강태욱,김진호,김봉만,서은경,배병서,김선욱 한국전기전자재료학회 2022 전기전자재료학회논문지 Vol.35 No.2
For enhancing the flame-retardant properties of wallpapers, we developed an organic-inorganic hybrid solution with ZrSiO4 as a functional ceramic powder, coated on non-woven fabric using dip coating, spray coating, and slot-die coating methods. Their flame retardant properties were characterized by a 45° combustion tester, which is manufactured according to the flame-retardant performance standard (KOFEIS 1001 and KS F 2819). In organic-inorganic hybrid solution, with increasing the concentration of acid-catalyst (acetic acid), the precipitation of ZrSiO4 powders increased, and the flame retardant properties decreased. The highest flame retardant result was obtained for the solution adding 5 wt% acetic acid. The optimization of the coating method and coating number resulted in the most excellent flame-retardant properties being obtained for the non-woven fabric coated for 5 or 7 times by dip coating method, and their flame-retardant properties corresponded to class 2 flame-retardant performance of wallpapers.