Publication detail

Thermal properties and stability of TeO2 containing phosphate glasses

Authors: Mošner Petr | Vosejpková Kateřina | Koudelka Ladislav

Year: 2011

Type of publication: článek v odborném periodiku

Name of source: Thermochimica Acta

Publisher name: Elsevier Science BV

Place: Amsterdam

Page from-to: 155-160

Titles:

Language	Name	Abstract	Keywords
cze	Termické vlastnosti a stabilita fosforečnanových skel s obsahem TeO2	Pomocí DTA a TD byly studovány termické vlastnosti skel systému ZnO–P2O5–TeO2 připravených v kompozičních řadách (100−x)[0.5ZnO–0.5P2O5]–xTeO2(řada X)a 50ZnO–50−y)P2O5–yTeO2 (řada Y) v koncentračním rozmezí x = 0–60 a y = 0 40 mol% TeO2.	fosforečnanová skla;telluričitá skla;krystalizace;nukleace;DTA;TD
eng	Thermal properties and stability of TeO2 containing phosphate glasses	Differential thermal analysis and thermodilatometry have been used to study the thermal behaviour of glasses in the ZnO–P2O5–TeO2 system prepared in compositional series(100−x)[0.5ZnO–0.5P2O5]–xTeO2 (X-series) and 50ZnO–50−y)P2O5–yTeO2 (Y-series) within the concentration range of x = 0–60 and y = 0 40 mol% TeO2. The addition of TeO2 to the starting zinc metaphosphate glass resulted in a gradual increase of thermal expansion coefficient from 12.2 up to 16.6 ppm◦C−1, whereas glass transition temperature and dilatometric softening temperature reveal a minimum at the glass with x = 30 mol% and y = 10 mol % TeO2. All glasses crystallize on heating within the temperature range ∼500–700 ◦C. The contribution of the surface crystallization mechanism over the internal one increases with increasing TeO2 content. Major compounds formed by crystallization were Zn(PO3)2 and Zn2P2O7.	Phosphate glasses;Tellurite glasses;Crystallization;Nucleation;Differential thermal analysis;Thermodilatometry

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