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논문 기본 정보

자료유형
학술저널
저자정보
Mantana Suwan (National Science and Technology Development Agency (NSTDA))
저널정보
한양대학교 세라믹공정연구센터 Journal of Ceramic Processing Research Journal of Ceramic Processing Research 제18권 제1호
발행연도
2017.1
수록면
10 - 15 (6page)
DOI
http://dx.doi.org/

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Near infrared (NIR)-reflective Mo-doped Sm2Ce2O7 yellow pigment was synthesized by solid-state reaction of the Sm2O3 andCeO2 in the presence of the (NH4)6Mo7O24. All the raw materials were wet-milled in acetone for 6 hrs to achieve thehomogeneous slurry followed by drying and firing at 1100, 1300 and 1500 oC for 6 hrs. The effect of Mo doping wasinvestigated by adding 10, 15, 20, 25 and 30 wt.% (NH4)6Mo7O24 with respect to the CeO2. Extended X-ray absorption finestructure (EXAFS) analysis revealed the substitution of the Mo6+ for the Ce4+. The doping resulted in a change of product’scolor; it turned from ivory white to yellow with the increase of dopant content up to 20 wt.%, and became dark green at higherdoping level. With the increase of firing temperature from 1100 oC to 1500 oC, the color became brighter yellow due to moresubstitution of the Mo6+ for the Ce4+. At the optimum synthesis condition, i.e. 20 wt.% doping level and 1500 oC firing, theproduct was most yellowish and had 69.2% NIR reflectance. This NIR-reflective pigment was mixed with a traditional glazeand waste-derived glaze. The resultant NIR-reflective glazes had very good chemical resistance with good appearance. TheNIR reflectance increased from 50.7 to 59.7% for the traditional ceramic glaze, and from 31.5 to 42.3% for the waste-derivedglaze.

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