Electrical properties of semiconducting (1-x)(90V2O5–10P2O5)+xBaTiO3 glass and glass–ceramics

Sadhukhan, M.; Modak, D. K.; Chaudhuri, B. K.
December 1996
Journal of Chemical Physics;12/22/1996, Vol. 105 Issue 24, p11326
Academic Journal
Homogeneous (12x)(90V[SUB2]O[SUB5]-10P[SUB2]O[SUB5]) + x((BaTiO[SUB3]) glasses (abbreviated as VPBT) are formed with lower concentrations (x) of BaTiO[SUB3] (x<0.3). For x>0.3 microcrystallization of BaTiO[SUB3] appears during glass formation (corresponding samples are termed as glass-ceramics). All of these oxide glasses show semiconducting behavior. Electrical conductivity data measured between 80 and 450 K follow the adiabatic small polaron hopping conduction mechanism for glasses with lower concentrations (x<0.2), but for higher concentrations of BaTiO[SUB3] (x>0.2) the said conduction mechanism is changed to the nonadiabatic regime. Low temperature (T⩽150 K) conductivity data of these glass samples can be well fitted with the variable range hopping model. At higher temperatures, Mott's model of phonon assisted small polaron hopping between nearest neighbors is consistent with the conductivity data. The polaron hopping model of Schnakenberg can predict the conductivity data in the entire temperature range of measurement. However, the percolation model, valid for the similar V[SUB2]O[SUB5]-Bi[SUB2]O[SUB-3]+SrTiO[SUB3] glass (denoted by VBBT), is not consistent with the experimental results of VPBT glass samples. Again the frequency dependent ac conductivity data of the VPBT glasses follow overlapping large polaron hopping model, while those of the VBBT glasses satisfy the correlated barrier hopping model.


Related Articles

  • Crystal domain growth driven by nanometric phase separation in perfect surface crystallization. Takahashi, Yoshihiro; Yamaoka, Kazuki; Yamazaki, Yoshiki; Miyazaki, Takamichi; Fujiwara, Takumi // Applied Physics Letters;8/12/2013, Vol. 103 Issue 7, p071909 

    Phase separation often makes glass structure inhomogeneous. Nevertheless, a uniform texture consisting of single-crystal domains has been found by crystallization in nonstoichiometric glass, i.e., perfect surface-crystallization (PSC). Although the PSC is probably caused by evolution of...

  • Magnetic measurements of superconducting glass-ceramic fine rods in Bi1Ca1Sr1Cu2Al0.5Ox prepared under a temperature gradient. Higashida, Yutaka; Yokoyama, Hisanori; Michishita, Kazuo; Kubo, Yukio; Yoshida, Hiroshi; Abe, Yoshihiro; Hosono, Hideo // Applied Physics Letters;10/9/1989, Vol. 55 Issue 15, p1578 

    It is shown that the crystallization of the glass precursor under a temperature gradient is very effective for preparing the superconducting glass ceramics in the Bi-Ca-Sr-Cu-O system. The magnetization measurements show that the specimen prepared under a temperature gradient has a magnetization...

  • The fast cooling/heating rate effects in devitrification of glasses. I. Number of nucleated.... Shneidman, V.A.; Uhlmann, D.R. // Journal of Chemical Physics;1/15/1998, Vol. 108 Issue 3, p1094 

    Focuses on the cooling and heating rate effects in devitrification of glasses. Influence of quench and heating rate on nucleation rate; Ways of decreasing the number of nucleated crystallites; Consideration of the effectivity of classical state approximation.

  • Free silicon and crystallization in silicon nitride based ceramics and in oxynitride glasses. Rouxel, Tanguy; Piriou, Bernard // Journal of Applied Physics;6/15/1996, Vol. 79 Issue 12, p9074 

    Demonstrates the similarity between the phenomena occurring in bulk oxynitride glasses and in silicon nitrides at grain boundaries. Features of silicon nitride-based ceramics; Additives used to promote densification with the presence of a liquid phase; Effect of heat treatments on secondary...

  • Low-melting crystallizable borophosphate glass binders. Barabanov, A. I.; Tagil'tseva, N. O.; Elyukova, N. V.; Khalilev, V. D.; Zaitsev, G. P. // Glass & Ceramics;Nov2005, Vol. 62 Issue 11/12, p341 

    Glass ceramic materials that can be used as ceramizing binders for abrasive tools with heat treatment temperatures of 650°C have been developed and tested. Their main physicochemical properties have been investigated.

  • Synthesis and investigation of the structure of ceramic nanopowders in the ZrO-CeO-AlO system. Panova, T. I.; Arsent'ev, M. Yu.; Morozova, L. V.; Drozdova, I. A. // Glass Physics & Chemistry;Aug2010, Vol. 36 Issue 4, p470 

    new technological scheme has been developed for synthesizing nanocrystalline powders in the ZrO-CeO-AlO system. The powders have been used for preparing nanoceramic materials with an open porosity of ∼1%. The physicochemical properties of these ceramic materials have been investigated.

  • How to Seal Using Glass-Ceramics. Sarno, Richard D. // R&D Magazine;Jun2001, Vol. 43 Issue 6, p50 

    Focuses on the glass-ceramic method, a process by which crystalline ceramics are produced by the controlled crystallization of glasses. How to control the crystalline phases produced and the resulting microstructure; Significance of the coefficient of thermal expansion to sealing applications;...

  • Advancing Ceramic & Glass Technology.  // Ceramic Industry;Aug2008, Vol. 158 Issue 8, p24 

    The article discusses the advances in ceramic and glass technology as highlighted at the Ceramic Industry's annual Ceramic and Glass R&D Overview. Some of the technological advances elaborated are the self-healing ceramic, hollow glass microspheres with porous walls, and the production of...

  • Photoinduced magnetization of glass-ceramic alloys in the Cu-As-Cr-Se system. Yu. Tver’yanovich; M. Bal’makov; A. Rusnak; D. Kim // Glass Physics & Chemistry;Oct2009, Vol. 35 Issue 5, p468 

    Abstract  The problem regarding the preparation of semiconductor materials with photoinduced ferromagnetism has been analyzed. One of the possible solutions to this problem has been proposed. For this purpose, finely dispersed crystals of the CuCr2Se4 ferromagnetic spinel in 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