Lima, Naiara A.
Alencar, Lorena D. S.
Feitosa, Carlos A. C.
Bernardi, Maria I. B.
Total Authors: 7
 Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
 IFMS, Inst Fed Mato Grosso Sul, BR-79200000 Aquidauana, MS - Brazil
 Univ Fed Maranhao, UFMA, Ctr Ciencias Exatas Tecnol, Dept Fis, BR-65080805 Sao Luis, MA - Brazil
 Univ Estadual Paulista, Dept Fis, Inst Geociencias & Ciencias Exatas, BR-13506900 Rio Claro, SP - Brazil
Total Affiliations: 4
JOURNAL OF ADVANCED CERAMICS;
Web of Science Citations:
NiWO4 was prepared using the polymeric precursor method and studied in terms of physical and chemical properties to verify its stability for industrial applications as pigments. The characterization was accomplished using thermal analyses, X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL) and UV-Vis spectroscopies, colorimetric coordinates, and Raman spectra. Increasing the temperature, successive exothermic reactions were observed and they are related with thermal decomposition of the organic compound. The stability was reached at similar to 700 degrees C. The material is verified to become completely free of second phase at similar to 800 degrees C. The end NiWO4 powders showed an intense charge transfer (CT)-related tail centered in the ultraviolet region, resulting in a yellow product. In addition, the powders exhibited broad excitation band and broad deep blue-green emission band, which were enhanced with increasing powders' crystallinity. (AU)