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최수녕,이병하,이용석 한국세라믹학회 2006 한국세라믹학회지 Vol.43 No.10
For the purpose of development of red color stain body, bone body which can be fired at 1180C and has a higher degree of whiteness and transmission was developed and a property experiment depending on the content of Fe2O3 was performed. For manufacturing this body, 9% addition of bone ash to commercialized white body resulted in the best whiteness and proper physical characteristics. In an experiment of oxidized iron addition using this body as a basis, red color stain body fired up to 1150C following the addition of 6% oxidized iron showed physical characteristics such as 5.4R color closer to theory color, 0.08% water absorption rate, 9.1% shrinkage, and 1861 kgf/cm2 bending strength, which implies that this body is suitable for red color stain body.
ZnO-Al<sub>2</sub>O<sub>3</sub>-Cr<sub>2</sub>O<sub>3</sub> 계 안료 합성 및 유약에서의 발색
최수녕,이용석,이병하,Choi, Soo-Nyong,Lee, Yong-Seok,Lee, Byung-Ha 한국세라믹학회 2008 한국세라믹학회지 Vol.45 No.5
$ZnAl_{1-x}\;Cr_xO_4$ solid solutions were synthesized as pink pigments with and without mineralizer. The pigments were examined to optimize color development conditions of temperature and $Cr_2O_3$ contents. The characteristics of synthesized pigments were analyzed by XRD, XPS, FT-IR and UV-vis spectrophotometer. While samples without mineralizer fired at $1300^{\circ}C$, showed $ZnAl_2O_4$ and $ZnCr_2O_4$ spinel in XRD analysis. While samples with mineralizer resulted in $ZnAl_2O_4$. As a results, the pigments show pink color and most effective pink color was obtained at X=0.15 and $1250^{\circ}C$ when mineralizer was used. The chromatic coordinates are $L^*$ 58.61 $a^*$ 24.48, and $b^*$ 9.60.
Synthesis of ZnO- Al₂O3-Cr₂O3 System Pigments with CrCl3
최수녕,이병하 한국세라믹학회 2009 한국세라믹학회지 Vol.46 No.4
The coloring agents Cr₂O₃ and CrCl₃ were manipulated in this study to synthesize ZnO-Al₂O₃-Cr₂O₃ system pigments by changing their mixing ratio. The addition of varying amounts of mineralizer was also tested to obtain better color development of the pink pigment. In the synthesis of ZnO- Al(OH)₃-Cr₂O₃-CrCl₃ pigments, the best composition is Cr₂O₃-0.1 mole and CrCl₃-0.2 mole when Cr₂O₃ is partially substituted with CrCl₃ to synthesize them. Among the ZnAl1.6-xCr0.2+xO₄ compositions to which a mineralizer was not added, ZnO-1mole, Al(OH)₃-1.7 mole, Cr₂O₃-0.075 mole, and CrCl₃-0.15 mole showed a desirable pink hue. The measurements of pigments L*, a* and b*, were L* 81.81, a* 16.65 and b* 0.45, and when the synthesized pigments were applied to a zinc glaze, the measurements were L* 60.41, a* 28.39, and b* 16.97. When adding a mineralizer, a 2 wt% addition resulted in the most favorable pink color. The composition for the most favorable result that included a mineralizer was Al(OH)₃-1.8 mole, Cr₂O₃-0.05 mole, and CrCl₃-0.1 mole, and the calcination temperature was 1250℃. The pigment color analysis showed L* 82.52, a*17.14 and b* -1.18, and the measurements of L*, a* and b* in the glaze were L* 60.97, a* 28.77 and b* 13.72.
Synthesis of ZnO-Al2O3-Cr2O3 Pigments and Coloring in Glazes
최수녕,이용석,이병하 한국세라믹학회 2008 한국세라믹학회지 Vol.45 No.5
ZnAl1-x CrxO4 solid solutions were synthesized as pink pigments with and without mineralizer. The pigments were examined to optimize color development conditions of temperature and Cr2O3 contents. The characteristics of synthesized pigments were analyzed by XRD, XPS, FT-IR and UV-vis spectrophotometer. While samples without mineralizer fired at 1300oC, showed ZnAl2O4 and ZnCr2O4 spinel in XRD analysis. While samples with mineralizer resulted in ZnAl2O4. As a results, the pigments show pink color and most effective pink color was obtained at X=0.15 and 1250oC when mineralizer was used. The chromatic coordinates are L* 58.61 a* 24.48, and b* 9.60. ZnAl1-x CrxO4 solid solutions were synthesized as pink pigments with and without mineralizer. The pigments were examined to optimize color development conditions of temperature and Cr2O3 contents. The characteristics of synthesized pigments were analyzed by XRD, XPS, FT-IR and UV-vis spectrophotometer. While samples without mineralizer fired at 1300oC, showed ZnAl2O4 and ZnCr2O4 spinel in XRD analysis. While samples with mineralizer resulted in ZnAl2O4. As a results, the pigments show pink color and most effective pink color was obtained at X=0.15 and 1250oC when mineralizer was used. The chromatic coordinates are L* 58.61 a* 24.48, and b* 9.60.
공침법에 의한 Fe<sub>2</sub>O<sub>3</sub>-CoO-Cr<sub>2</sub>O<sub>3</sub>-MnO<sub>2</sub>계 안료 연구
최수녕,이병하,Choi, Soo-Nyong,Lee, Byung-Ha 한국결정성장학회 2007 韓國結晶成長學會誌 Vol.17 No.6
본 연구에서는 $Fe_2O_3-CoO-Cr_2O_3-MnO_2$계 색상의 무기안료를 공침법을 사용하여 합성하였다. 출발원료로는 $FeCl_3,\;CoCl_2,\;CrCl_3,\;MnCl_2$를 사용하였으며 침전제로는 2N-KOH를 사용하였다. $MnCl_2$는 10 mole%로 고정한 후 세 가지 원료로서 6가지 조성비를 만들어 안료를 합성하였다. 조합된 시료는 1.5시간 $1350^{\circ}C$에서 하소하였다. XRD, FT-IR, SEM 과 UV spectrophotometer를 사용하여 안료의 특성 분석을 하였다. 합성된 안료는 석회유, 석회 바륨유에 각각 6wt%씩 첨가하여 $1260^{\circ}C$ 산화소성, $1240^{\circ}C$ 환원 소성하였다. UV Spectrometer를 사용하여 색상분석을 한 결과는 black, bluish black, dark grayish green을 나타냈다. The inorganic pigments of $Fe_2O_3-CoO-Cr_2O_3-MnO_2$ were synthesized by the co-precipitation method. $FeCl_3,\;CoCl_2,\;CrCl_3\;and\;MnCl_2$ are used for the starting raw materials, and 2 N-KOH for precipitator. $MnCl_2$ is secured with 10 mole%, and 6 composition ratios are used with three ingredients to synthesize the pigments. The samples were calcined at $1350^{\circ}C/1.5h$. The resulting pigments were characterized by using XRD, FT-IR, SEM, and UV spectrophotometer. 6wt% pigments were applied to lime glaze and lime-barium glaze respectively firing at $1260^{\circ}C$ for oxidation atmosphere and $1240^{\circ}C$ for reduction one. The results of color analysis by using UV spectrophotometer showed black, bluish black and dark grayish green.