Glass formation in the TeO2-MoO3-CeO2 system
作者： Y. Dimitriev , J. C. J. Bart , I. Ivanova , V. Dimitrov
关键词: Crystallography 、 Electron hopping 、 Glass forming 、 Ternary operation 、 Mineralogy 、 Ternary numeral system 、 Chemistry
摘要: Glass formation in the TeO2MoO3CeO2 system was investigated and low melting stable glasses with up to 30 mole-% CeO2 were synthesized. Infrared spectral investigations used develop structural models for vitreous ternary system. mainly acts as a modifier without affecting appreciable changes glass network coordination of formers. Glasses molybdenum-rich compositional range are composed [MoO6] [TeO3] polyhedra, whereas MoO3-containing consist [TeO4] groups isolated [MoO4] units. On whole, basic polyhedra participating three-dimensional forming therefore [TeO4], [TeO3], [MoO6], [MoO4], [Mo2O8] (or [MoO5]) The affinity some crystalline Ce4Mo11Te10O59 is pointed out. high electrical conductivity interpreted on basis electron hopping between transition ions different valence states contributions due Te(IV) network. Glasbildung im TeO2MoO3CeO2-System Untersucht wurde die Glasbildung TeO2MoO3CeO2-System, und es wurden niedrigschmelzende stabile Glaser mit bis zu mol-% synthetisiert. Infrarot-Spektraluntersuchungen zur Entwicklung von Strukturmodellen fur ternare angewandt. wirkt erster Linie als Modifiziermittel verursacht keine nennenswerten Anderungen Glasnetzwerk der Anordnung Glasbildner. Die molybdanreichen sind hauptsachlich aus [MoO6]- [TeO3]-Polyedern zusammengesetzt, wogegen niedrigem MoO3-Anteil [TeO4]-Gruppen isolierten [MoO4]-Einheiten bestehen. Insgesamt gesehen an Bildung des dreidimensionalen glasbildenden Netzwerks beteiligten Polyeder daher [TeO4]-, [TeO3]-, [MoO6]-, [MoO4]- [Mo2O8]- (oder [MoO5])-Einheiten. strukturelle Affinitat einiger ternarer kristallinem wird gezeigt. hohe elektrische Leitfahigkeit ternaren auf Grundlage Elektronensprunges zwischen den Wertigkeitsstufen Ubergangsmetallionen Anteilen TeIV-Netzwerks interpretiert.
sci-hub.se 参考文章(31)
A Mansingh, V K Dhawan, AC conductivity of V2O5-TeO2 glasses Journal of Physics C: Solid State Physics. ,vol. 16, pp. 1675- 1686 ,(1983) , 10.1088/0022-3719/16/9/012
R. H. Busey, O. L. Keller, Structure of the Aqueous Pertechnetate Ion by Raman and Infrared Spectroscopy. Raman and Infrared Spectra of Crystalline KTcO4, KReO4, Na2MoO4, Na2WO4, Na2MoO4·2H2O, and Na2WO4·2H2O Journal of Chemical Physics. ,vol. 41, pp. 215- 225 ,(1964) , 10.1063/1.1725625
OSAMA H. EL-BAYOUMI, K. N. SUBRAMANIAN, Crystallization of a Cerium Phosphate Glass Journal of the American Ceramic Society. ,vol. 60, pp. 161- 165 ,(1977) , 10.1111/J.1151-2916.1977.TB15494.X
H. Jain, A. S. Nowick, Electrical conduction in paratellurite (TeO2) crystals Physica Status Solidi (a). ,vol. 67, pp. 701- 707 ,(1981) , 10.1002/PSSA.2210670242
Y. Dimitriev, V. Dimitrov, M. Arnaudov, D. Topalov, IR-spectral study of vanadate vitreous systems Journal of Non-crystalline Solids. ,vol. 57, pp. 147- 156 ,(1983) , 10.1016/0022-3093(83)90417-9
Z. Konstants, M. Vaivada, Phosphate glasses containing major proportions of transition metal oxides Journal of Non-crystalline Solids. ,vol. 45, pp. 105- 114 ,(1981) , 10.1016/0022-3093(81)90095-8
C.H. Chung, J.D. Mackenzie, Electrical properties of binary semiconducting oxide glasses containing 55 mole % V2O5 Journal of Non-crystalline Solids. ,vol. 42, pp. 357- 370 ,(1980) , 10.1016/0022-3093(80)90036-8
W. D. JOHNSTON, Oxidation‐Reduction Equilibria in Molten Na2O.2SiO2 Glass Journal of the American Ceramic Society. ,vol. 48, pp. 184- 190 ,(1965) , 10.1111/J.1151-2916.1965.TB14709.X
G.M. Clark, W.P. Doyle, Infra-red spectra of anhydrous molybdates and tungstates Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. ,vol. 22, pp. 1441- 1447 ,(1966) , 10.1016/0371-1951(66)80137-6
N.F. Mott, Conduction in glasses containing transition metal ions Journal of Non-Crystalline Solids. ,vol. 1, pp. 1- 17 ,(1968) , 10.1016/0022-3093(68)90002-1