Crystallization of TeO2--Nb2O5 glasses and their network structural evolution

LIN, J.; HUANG, W.; MA, L.; BIAN, Q.; QIN, S.; WEI, H.; CHEN, J.
June 2009
Materials Science (0137-1339);2009, Vol. 27 Issue 2, p329
Academic Journal
TeO2-Nb2O5 glass is a kind of heavy metal oxide glass with a chain-like network structure, in which Nb5+ ions connect the Te-O chains and adjust the types of [TeOx] (x = 3, 4) coordination polyhedra to stabilize the glass network. (100 - y)TeO2-yNb2O5 (y = 3-20 mol %) glasses were prepared, the crystallization behaviour and their network structural evolution were studied by means of differential thermal analysis (DTA), X-ray diffraction (XRD) and Fourier transform infrared spectra (FT-IR). The results show that the stabilization of the TeO2-Nb2O5 glass network is greatly influenced by the constitution of Te-O chains and their linkage. The glass structure with lower Nb5+ content is inhomogeneous, it is composed of edge sharing Te-O chains, partly edge sharing chains connected by Nb5+ ions, apical sharing chains and apical sharing chains connected by Nb5+ ions. Crystalline phases of β-TeO2, Nb2Te4O13, α-TeO2 and Te3Nb2O11 will be formed in turn when the treatment temperature of the glass is increased. When the concentration of Nb 5+ ions is sufficient to well connect Te-O chains, the glass network will tend to homogenize, only one crystalline phase, Nb2Te4O13, will be formed. A suitable preheat treatment will also help to homogenize the glass structure and make the glass more stable.


Related Articles

  • Crystallization of TeO2--Nb2O5 glasses and their network structural evolution. LIN, J.; HUANG, W.; MA, L.; BIAN, Q.; QIN, S.; WEI, H.; CHEN, J. // Materials Science (0137-1339);2009, Vol. 27 Issue 1, p329 

    TeO2-Nb2Os glass is a kind of heavy metal oxide glass with a chain-like network structure, in which Nbs+ ions connect the Te-O chains and adjust the types of [TeOx] (x = 3, 4) coordination polyhedra to stabilize the glass network. (100 -y)TeO2-yNb2O5 (y = 3-20 mol %) glasses were prepared, the...

  • Synthesis, Growth, Spectroscopic, Optical and Thermal studies of Glycinium Maleate single crystals. Rubya, A.; Alfred Cecil Raj, S. // Advances in Applied Science Research;Jun2012, Vol. 3 Issue 3, p1677 

    Organic single crystal of glycinium maleate (GM) of size 14x7x8 mm3 was grown by the solvent evaporation technique at room temperature. The solubility of GM material was studied. Unit cell parameters of the grown GM crystal were determined by single crystal X- ray studies. Powder X- ray...

  • Synthesis of YAP phase by a polymeric method and phase progression mechanisms. Carvalho, J. F.; Vicente, F. S.; Marcellin, N.; Odier, P.; Hernandes, A. C.; Ibanez, A. // Journal of Thermal Analysis & Calorimetry;Jun2009, Vol. 96 Issue 3, p891 

    The phase formation kinetics of YAP (YAlO3) synthesized through the polymeric precursor method was investigated by thermal analysis, X-ray diffraction and FT-IR spectroscopy. We demonstrated that the YAP synthesis is highly dependent on the heat and mass transport during all stages of the...

  • Spectral and thermal characterization of grown organic single crystal. Janarthanan, S.; Sugaraj Samuel, R.; Rajan, Y.; Umarani, P.; Pandi, S. // Journal of Thermal Analysis & Calorimetry;Jul2012, Vol. 109 Issue 1, p69 

    The growth of semicarbazone of p-hydroxy benzaldehyde (SPHB) single crystal by slow evaporation solution growth technique is reported in this article. The grown crystal was subjected to powder XRD study to identify the crystalline nature. Single crystal XRD study was done to measure unit cell...

  • Growth of <201> 8-hydroxyquinoline organic crystal by Czochralski method and its characterizations. Aravinth, K.; Anandha Babu, G.; Ramasamy, P. // Journal of Thermal Analysis & Calorimetry;Dec2012, Vol. 110 Issue 3, p1333 

    In this study, 8-Hydroxyquinoline (8HQ) single crystal has been successfully grown by Czochralski method. The unit cell parameters of 8HQ single crystal were confirmed by single crystal X-ray diffraction analysis. The crystalline perfection of grown crystal has been analyzed by high-resolution...

  • FTIR AND EPR SPECTROSCOPIC CHARACTERISATION OF IRONTELLURITE GLASSES OBTAINED BY THE SOL-GEL METHOD. Adriana, Dehelean; Simona, Rada; Adriana, Popa; Virginia, Danciu; Eugen, Culea // Progress of Cryogenics & Isotopes Separation;2010, Vol. 13 Issue 1, p53 

    Iron-tellurite glasses were obtained using the sol-gel method. The samples were characterized by X-ray diffraction, FTIR and electron paramagnetic resonance (EPR) spectroscopy. FTIR data reveal that the vitreous network of the studied glasses are based on TeO6, TeO4 and TeO3 structural units....

  • Ultrasonic and Spectroscopic Studies on Structural Elucidation of Some Vanadium Glasses. Thirumaran, S.; Earnest Jayakumar, J. // Research Journal of Physics;2014, Vol. 8 Issue 1, p1 

    Semi conducting vanadium glasses with different V2O5 contents have been prepared by rapid quenching technique. Ultrasonic velocities measurements have been performed over a wide range of temperatures from 1020-1060 K. Elastic moduli, Debye temperature and poisson's ratio have been obtained for...

  • Synthesis, characterization, and thermochemical property of a novel mixed alkali metal borate: NaCs[BO(OH)]. Li, Lian-Qing; Song, Qing; Li, Ping; Huang, Hong-Sheng; Liu, Zhi-Hong // Journal of Thermal Analysis & Calorimetry;May2014, Vol. 116 Issue 2, p1019 

    A novel mixed alkali metal hydrated borate NaCs[BO(OH)] was synthesized under hydrothermal conditions. Its structure was determined by single-crystal X-ray diffraction and further characterized by FT-IR spectroscopy, TG-DTA, powder X-ray diffraction, and chemical analysis. NaCs[BO(OH)]...

  • Investigation on the Growth and Characterization of Nonlinear Optical Single Crystals of Tris-Allyl Thiourea Mercury Bromide (ATMB). Vetha Potheher, I.; Rajarajan, K.; Vimalan, M.; Rajesh Kumar, T.; Jeyasekaran, R.; Sagayaraj, P. // Archives of Applied Science Research;2010, Vol. 2 Issue 3, p171 

    Single crystal of Tris-allylthiourea mercury bromide (ATMB), a NLO active complex of allylthiourea was grown by slow evaporation technique at 305 K. The structure of the grown crystal was confirmed by single crystal XRD. The composition of the sample was identified by CHN elemental analysis. The...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics