Photoluminescence in amorphous PLZ

• Published in: Ceramics international Vol. 29; no. 7; pp. 793 - 799
• Main Authors: Freitas, G.F.G, Nasar, R.S, Cerqueira, M, Melo, D.M.A, Longo, E, Pizani, P.S, Varela, J.A
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 2003; Elsevier Science
• Subjects: Amorphous materials; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Lead Zirconate; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Other solid inorganic materials; Photoluminescence; Photoluminescent materials; Physics; Lead Zirconate; Amorphous materials; Photoluminescent materials; Powders; Inorganic compounds; Lanthanum Zirconates; Photoluminescence; XRD; Amorphous state; Rare earth compounds; Experimental study; Precursor; Lead zirconates; TGA; DSC; Chemical preparation; Zirconates; Polymers
• ISSN: 0272-8842; 1873-3956
• DOI: 10.1016/S0272-8842(02)00232-8

Amorphous and crystalline powder of PLZ was prepared by using the polymeric precursor method. TGA-DSC (Thermal analysis and Differential Scanning Calorimetry) shows the decomposition of polymeric resin, an amorphous phase and the crystallization of powder. Raman scattering of powder shows an amorphous and semicrystalline phase at 450 and 550 °C, respectively. XRD (X-ray diffraction pattern) of powder shows high crystallinity at 700 °C/3 h. PL (Photoluminescence) analysis of powder at 300 °C/3 h shows a broad asymmetric peak at 585 nm and increases of calcining time led to intense peaks of PL at 300 °C/6 h. This emission could be attributed to Zr → O from the oxygen-2p orbitals to the zirconate-3d orbitals.