Synthesis and characterization of new amorphous and crystalline phases in Bi2O3–SrO–TeO2 system

Glasses formation, characterization, and crystal-structure determination in the Bi2O3–Sb2O3–TeO2 system prepared in an air

“…3 ) a first peak of crystallization corresponds to the γTeO 2 , αTeO 2 , and SbTe 3 O 8 at 405–437 °C range. This phenomenon which we observed the crystallization γTeO 2 variety could be expected: similar behavior has been observed in the many others systems as TeO 2 –WO 3 [ 15 ], Nb 2 O 5 –TeO 2 [ 13 , 16 ], TeO 2 –ZnO [ 18 ] and TeO 2 –SrO [ 19 ]. In second crystallization ranging 497–519 °C belongs to reinforcing SbTe 3 O 8 and TeO 2 α phases.…”

“…Of these, recently documented c-TeO 2 phase has gained a lot of attention for nonlinear optical designs and efforts are made to understand its properties in bulk crystal and glass using as Fourier transform infra-red spectroscopy (FTIR) and Raman spectroscopy. It has been reported that c-TeO 2 phase appears as the first crystalline structure during the temperature-induced crystallization of TeO 2 glass [17][18][19][20]. TeO 2 glass is not stable.…”

Structure and electrical behavior relationship of a magnesium–tellurite glass using Raman and impedance spectroscopy

“…This behavior has not been explored on this matrix for earth alkaline modifiers, thus opening a promissory window to the exploration for new ionic conductor glasses. There are many studies on binary and ternary tellurite glasses modified with alkaline-earth elements [12][13][14][15][16][17][18][19][20][21][22][23] but there are only a few on quaternary tellurite glasses modified with divalent cations. The aim of this work is to present a structural and an electric study of the glass of formula xMgO(1 − x)(0.5V 2 O 5 •0.5MoO 3 )2TeO 2 (x: mol number of magnesium oxide in the system) which behaves as a semiconducting glass for all compositions range in order to understand the role of the valence of the modifier ions and the nature of the modifications induced by the presence of transition metal oxides in the structure.…”

New tellurite glasses and crystalline phases in the Bi2O3–CaO–TeO2 system: Synthesis and characterization

“…Table 1 Characteristics (Tg, Tc) and difference (Tc1 − Tg) of some glasses in the CaO-TeO2-Bi2O3 system. mol% BiO1.5 mol% TeO2 mol% CaO 0 95 5 340 390 430 515 50 0 90 10 359 384 475 515 25 0 85 15 365 385 451 525 20 This phenomena is also observed in the system as TeO 2 -WO 3 [8], Nb 2 O 5 -TeO 2 [8,11], TeO 2 -ZnO [12,15] and TeO 2 -SrO [16]. The second crystallization ranging 430-475 • C belongs to ␣CaTe 2 O 5 phase.…”

“…1). In comparison with pseudo-binary BaO-TeO 2 [15] and SrO-TeO 2 [16] studies previously this field is narrow. It seems that the vitreous field is closely related to the size of modifying oxide (rBa 2+ = 1.34 Å > rSr 2+ = 1.16 Å > rCa 2+ = 1.00 Å [17]).…”