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Synthesis and spectral properties of Nd-doped glass-ceramics in SiO 2-CaO-MgO system prepared by sol-gel method

Masoud, E ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1016/S1002-0721(12)60326-3
  3. Publisher: 2013
  4. Abstract:
  5. SiO2-CaO-MgO glass and glass-ceramic powder doped with Nd 3+ were synthesized with sol-gel method. Tetraethylorthosilicate (TEOS), Ca(NO3)2·4H2O, Mg(NO 3)2·6H2O, Nd(NO3) 3·6H2O, ethanol, distilled water, and HNO 3 were used as starting materials. The synthesized powder's properties were examined with simultaneous thermal analysis (STA), X-ray diffraction (XRD), photoluminescence (PL) and scanning electron microscopy (SEM) analysis. The STA curves showed that the softening point and crystallization temperatures were shifted to higher temperatures with increasing dopant content. Regarding XRD patterns of glass samples, Nd was found to act as an intermediate oxide in glass matrix. The XRD patterns of glass-ceramic samples indicated that bredigite and akermanite crystallized in the glass matrix after heat treating at 900 °C. The fluorescence spectra showed that glass-ceramics emitted much stronger irradiation than glasses with the same dopant content. The SEM images illustrated uniform and homogeneous distribution of applied oxides in glass and glass-ceramic compositions
  6. Keywords:
  7. Glass ; Glass-ceramic ; Rare earths ; Sol-gel method ; Spectral properties ; Synthesis ; Crystallization temperature ; Fluorescence spectra ; Homogeneous distribution ; Simultaneous thermal analysis ; Softening points ; Synthesized powder ; Tetraethyl orthosilicates ; Glass ceramics ; Magnesia ; Scanning electron microscopy ; Sol-gel process ; Synthesis (chemical) ; Thermoanalysis ; X ray diffraction ; Secondary batteries
  8. Source: Journal of Rare Earths ; Volume 31, Issue 6 , 2013 , Pages 595-599 ; 10020721 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S1002072112603263