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Journal of Thermal Analysis and Calorimetry

, Volume 138, Issue 3, pp 1895–1899 | Cite as

Influence of Er3+ ions addition on thermal and optical properties of phosphate–germanate system

  • Lidia PopEmail author
  • Liviu BolunduţEmail author
  • Petru Pascuta
  • Eugen Culea
Article

Abstract

Zinc phosphate–germanate samples doped with Er3+ ions and co-doped with silver nanoparticles in the 59.7KPO3–0.3Ag(NPs)–20ZnO–(20 − x)GeO2xEr2O3 system where x ≤ 5 mol% were prepared by melting–quenching technique. The mentioned system was studied by X-ray diffraction (XRD), differential thermal analysis (DTA) and ultraviolet–visible (UV–Vis) spectroscopy, too. XRD analysis shows the presence of amorphous state for low contents of erbium and the presence of the ErPO4 (tetragonal, body-centered lattice) crystalline phase beside the amorphous phase for high contents of erbium (x ≥ 3 mol%). DTA investigation permitted the identification of some thermal parameters such as glass transition temperature, crystallization temperature and melting temperature. From these data, other two important parameters were calculated: the fragility index and the activation energy of glass transition. In our case, the obtained data reveal a good thermal stability for the matrix of the studied system. The increase in the content of erbium ions leads to more fragile glasses and glass ceramic samples. The DTA results also show that the samples are obtained from KS liquids. The UV–Vis spectroscopy shows seven ff electronic transitions for the studied system, due to the presence of erbium ions. From the obtained UV–Vis data, the bonding parameter that shows an ionic character of the bonds from the glass ceramic network was calculated. Also, the values of optical band gap energy (\(E_{\text{g}}^{\text{opt}}\)) show that when the erbium ions content increases, the \(E_{\text{g}}^{\text{opt}}\) values decrease due probably to the amount of non-bridging oxygen atoms from the network.

Keywords

Thermal properties Optical properties Erbium ions Phosphate glasses 

Notes

References

  1. 1.
    Gomes JF, Lima AMO, Sandrini M, Medina AN, Steimacher A, Pedrochi F, Barboza MJ. Optical and spectroscopic study of erbium doped calcium borotellurite glasses. Opt Mater. 2017;66:211–9.CrossRefGoogle Scholar
  2. 2.
    Umar SA, Halimah MK, Chan KT, Latif AA. Physical, structural and optical properties of erbium doped rice husk silicate borotellurite (Er-doped RHSBT) glasses. J Non-Cryst Solids. 2017;472:31–8.CrossRefGoogle Scholar
  3. 3.
    Silarska K, Sroda M, Pasierb P. Application of DTA/DSC and dilatometry for optimization of Ba–Ce–Y–P–Si–O glass phase for composite protonic conductors based on BaCe0.9Y0.1O3−δ. J Therm Anal Calorim. 2018;133(1):87–93.CrossRefGoogle Scholar
  4. 4.
    Gautam CR, Das S, Gautam SS, Madheshiya A, Singh AK. Processing and optical characterization of lead calcium titanate borosilicate glass doped with germanium. J Phys Chem Solids. 2018;115:180–6.CrossRefGoogle Scholar
  5. 5.
    Tang Y, Shih K, Li M, Wu P. Zinc immobilization in simulated aluminum-rich waterworks sludge systems. Proc Environ Sci. 2016;31:691–7.CrossRefGoogle Scholar
  6. 6.
    Qi Y, Zhou Y, Wu L, Yang F, Peng S, Zheng S, Yin D, Wang X. Annealing time dependent 1.53 µm fluorescence enhancement in Er3+-doped tellurite glasses containing silver NPs. Mater Lett. 2014;125:56–8.CrossRefGoogle Scholar
  7. 7.
    Tauc J. Amorphous and liquid semiconductors. London: Plenum; 1974.CrossRefGoogle Scholar
  8. 8.
    Davis EA, Mott NF. Conduction in non-crystalline systems conductivity, optical absorption and photoconductivity in amorphous semiconductors. Philos Mag. 1970;22:903–22.CrossRefGoogle Scholar
  9. 9.
    Dietzel A. Glass structure and glass properties. Glasstech Berl. 1968;22:41–50.Google Scholar
  10. 10.
    Hruby A. Evaluation of glass-forming tendency by means of DTA. Physica B. 1972;22:1187–93.Google Scholar
  11. 11.
    Hruby A. Glass-forming tendency in the GeSx system. Physica B. 1973;23:1263–72.Google Scholar
  12. 12.
    Saad M, Poulin M. Glass forming ability criteria. Mater Sci Forum. 1987;19–20:11–8.CrossRefGoogle Scholar
  13. 13.
    Rahvard MM, Tamizifar M, Boutorabi SMA. Non-isothermal crystallization kinetics and fragility of Zr56Co28Al16 and Zr56Co22Cu6Al16 bulk metallic glasses. J Therm Anal Calorim. 2018;134(2):903–14.CrossRefGoogle Scholar
  14. 14.
    Kumar A, Ram IS, Kumar S, Ram J, Upadhyay AN, Singh K. Glass-forming ability and thermal stability of Se100−x(Ge2Sb2Te5)x glassy alloys. J Therm Anal Calorim. 2018;134(2):923–31.CrossRefGoogle Scholar
  15. 15.
    Kissinger HE. Reaction kinetics in thermal analysis. Anal Chem. 1957;29:1702–6.CrossRefGoogle Scholar
  16. 16.
    Saxena NS. Phase transformation kinetics and related thermodynamic and optical properties in chalcogenides glasses. J Non-Cryst Solids. 2004;161:345–6.Google Scholar
  17. 17.
    Assadi AA, Damak K, Lachheb R, Herrmann A, Yousef E, Russel C, Maâlej R. Spectroscopic and luminescence characteristics of erbium doped TNZL glass for lasing materials. J Alloys Compd. 2015;620:129–36.CrossRefGoogle Scholar
  18. 18.
    Sinha SP. Complexes of the rare earths. Oxford: Pergamon Press; 1966.CrossRefGoogle Scholar
  19. 19.
    Carnall WT, Fields PR, Rajnak K. Electronic Energy Levels in the Trivalent Lanthanide Aquo Ions. I. Pr3+, Nd3+, Pm3+, Sm3+, Dy3+, Ho3+, Er3+, and Tm3+. J Chem Phys. 1968;49:4424–42.CrossRefGoogle Scholar
  20. 20.
    Bolundut L, Culea E, Borodi G, Stefan R, Munteanu C, Pascuta P. Influence of Sm3+: Ag codoping on structural and spectroscopic properties of lead tellurite glass ceramics. Ceram Int. 2015;41:2931–9.CrossRefGoogle Scholar

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.Department of Physics and ChemistryTechnical University of Cluj-NapocaCluj-NapocaRomania

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