친환경 무기 형광 안료 A3V5O14 (A = K and Rb) and Cs2V4O11 개발: 결정구조, 광학적 특성 및 착색 특성
Development of environmentally friendly inorganic fluorescent pigments, A3V5O14 (A = K and Rb) and Cs2V4O11:Crystal structure, optical and color properties
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본 연구에서는 밝고 화사한 적색 및 황색의 착색 특성을 가지며, 우수한 발광특을 가진 새로운 무기 형광 안료를 개발하기 위하여, A3V5O14 (A = K and Rb) 및 Cs2V4O11를 water assisted solid state reaction(WASSR) 방법과 고상법을 혼합하여 합성을 하였다. 합성한 A3V5O14 (A =K and Rb ) 및 Cs2V4O11 샘플은 AVO3 및 AV3O8 (A = K, Rb and Cs)가 불순물로 다소 확인되었으나, trigonal 구조의 A3V5O14 (A=K and Rb)와 orthorhombic 구조의 Cs2V4O11가 주상으로 확인되었다. A3V5O14 (A = K and Rb)와 Cs2V4O11는 자외선 영역에서 강한 광흡수를 나타내었으며, 각각 적색광 및 녹색광 발광을 나타내었다. 또한, 합성된 A3V5O14 (A = K and Rb)는 a* 값 ( + : 적색도, -: 녹색도)은 각각 + 35.5와 + 45.9를, Cs2V4O11는 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.
Abstract
To develop the bright-vivid red- and yellow-inorganic fluorescent pigments with high luminescence properties,A3V5O14 (A = K and Rb) and Cs2V4O11 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 AVO3 and AV3O8(A = K, Rb, and Cs) were observed in all samples prepared, the trigonal structure A3V5O14 (A = K and Rb) and orthorhombic structure Cs2V4O11 were successfully obtained as a main phase. These inorganic pigments showed the broad absorption band(under 550 nm) originated from CT transitions of VO4 polyhedron, and the strong broad red- and green-emission bands dueto ³T₂→¹A₁ and ³T₁→¹A₁ transitions of the [VO4]3- group. The A3V5O14 (A = K and Rb) and Cs2V4O11 pigments showeda bright-vivid red- and yellow-body color, where the a* values of the A3V5O14 (A = K and Rb) were +35.5 and +45.9,respectively, and b* value of Cs2V4O11 pigments was +50.3. The L* values of the A3V5O14 (A = K and Rb) and Cs2V4O11 inorganic pigments were over +45. These results indicate that the A3V5O14 (A = K and Rb) and Cs2V4O11 inorganic pigmentscould be an attractive candidate as a bright-vivid red- and yellow inorganic pigments.
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