Sol-gel Derived Europium Doped CaMoO4:Eu3+ with Complex Microstructural and Optical Properties

  • Gediminas BRAZIULIS Vilnius University
  • Ruta STANKEVICIUTE Vilnius University
  • Arturas ZALGA Vilnius University
Keywords: inorganic compounds, optical materials, sol-gel synthesis, microstructure

Abstract

The crystalline compounds CaMoO4 doped with Eu3+ ions were prepared from nitrate-tartrate precursor gels at 650, 700, 750 and 800°C temperatures. The obtained samples were characterized by thermal analysis (TG/DSC), Furier Transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM) and reflection measurements (UV-vis). TG/DSC analysis revealed the possible decomposition mechanism of synthesized Ca-Mo-O nitrate-tartrate gel. XRD data exhibited that even at 650°C temperature the crystalline powelite (CaMoO4) structure has formed. To understand the crystal growth process of the CaMoO4:xEu3+ compounds (x = 1, 2, 3, 4, 5 and 6 mol%), the influence of temperature on the surface morphology of the end products by SEM analysis was investigated. No evidence of organic residual in the final materials was found, confirmed by FT-IR analysis. UV-vis reflectance spectra revealed that by increasing of Eu3+ ions concentrations in the host material the reflection peaks of Eu2O3 also increased.

DOI: http://dx.doi.org/10.5755/j01.ms.20.1.4797

Author Biographies

Gediminas BRAZIULIS, Vilnius University
Assoc. Prof. Dr. ARTURAS ZALGADepartment of Inorganic ChemistryFaculty of Chemistry, Vilnius UniversityNaugarduko str. 24, LT-03225 Vilnius, LithuaniaPhone (+370 5) 219 3107, fax (+370 5) 233 0987E-mail: arturas.zalga@chf.vu.lt
Arturas ZALGA, Vilnius University
Assoc. Prof. Dr. ARTURAS ZALGA Department of Inorganic Chemistry Faculty of Chemistry, Vilnius University Naugarduko str. 24, LT-03225 Vilnius, Lithuania Phone (+370 5) 219 3107, fax (+370 5) 233 0987 E-mail: arturas.zalga@chf.vu.lt
Published
2014-03-23
Section
CERAMICS AND GLASSES