نوع مقاله : مقاله پژوهشی
نویسندگان
1 آزمایشگاه نانورنگدانهها و پوششهای سرامیکی، دانشکده فیزیک، دانشگاه یزد
2 آزمایشگاه نانو نانورنگدانهها و پوششهای سرامیکی، دانشکده فیزیک، دانشگاه یزد
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Chromium oxide based nanopigments are widely used in many fields such as coating, wear and wear resistance materials, H2 absorbent material and advanced colorants. In this paper, chromium oxide-based nano pigments of Cr2O3, CoCr2O4 and Al2O3-2Cr2O3 were synthesized via hydrothermal method and then calcinated at 770 °C for 4 h. The prepared samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results of XRD analysis show that Cr2O3 and CoCr2O4 were crystallized in a single-phase structure while Al2O3-2Cr2O3 was crystallized in multi-phase structure. SEM images show that the pigments are nanostructures and the average particle size of Cr2O3, CoCr2O4 and Al2O3-2Cr2O3 nanopigments were about 57, 33 and 83 nm, respectively. The samples were also characterized by diffuse reflectance spectroscopy (DRS) and CIE-L*a*b* colorimetric measurement. The nanopigments obtained in this work presented different colors such as green and greenish yellow colors.
کلیدواژهها [English]