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http://dx.doi.org/10.4191/kcers.2017.54.5.02

Study on the Electrical Conductivity and Catalytic Property by Structural Change of 70V2O5-10Fe2O3-13P2O5-7B2O3 Glass with Crystallization  

Jeong, Hwa-Jin (Department of Materials Science and Engineering, Pusan National University)
Cha, Jae-Min (The Institute of Materials Technology, Pusan National University)
Ryu, Bong-Ki (Department of Materials Science and Engineering, Pusan National University)
Publication Information
Journal of the Korean Ceramic Society / v.54, no.5, 2017 , pp. 406-412 More about this Journal
Abstract
$70V_2O_5-10Fe_2O_3-13P_2O_5-7B_2O_3$ glasses were prepared to study the electrical conductivity and catalytic properties of the structural change with crystallization. The structural changes were analyzed by determining the molecular volume from the sample density; using X-Ray Diffraction (XRD) analysis, which indicated that $V_2O_5$, $VO_2$ and $B_2O_3$ crystals in heat-treated more than 1h samples. Especially a new crystalline phase of non-stoichiometric $Fe_{0.12}V_2O_5$ was formed after 6 h heat treatment. The V-O bonding change after crystallization was analyzed by Fourier Transform Infrared Spectroscopy (FTIR); V ion change from $V^{5+}$ to $V^{4+}$ was shown by XPS. Conductivity and catalytic properties were examined based on the polaronic hopping of V and Fe ions, which exhibited different valence states with crystallization.
Keywords
Chemical properties; Electrical conductivity; Glass ceramics; X-Ray diffraction;
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