Crystallization kinetics of K2O·TiO2·3GeO2 glass studied by DTA

Crystallization kinetics of K2O·TiO2·3GeO2 glass studied by DTA

Crystallization kinetics of K2O?TiO2?3GeO2 glass was investigated by differential thermal analysis (DTA). Experiments were performed on powder samples with a particle size < 0.037 mm. The glass samples were heated at different rates in the temperature range 20-750?C. The kinetic parameters, activ...

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Veröffentlicht in:Science of sintering 2008, Vol.40 (3), p.333-338
Hauptverfasser: Grujic, S., Blagojevic, N., Tosic, M., Zivanovic, V., Nikolic, J.
Format: Artikel
Sprache:eng
Schlagworte:
Crystallization kinetics
Germanate glass
Polymorphic crystallization
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Zusammenfassung:Crystallization kinetics of K2O?TiO2?3GeO2 glass was investigated by differential thermal analysis (DTA). Experiments were performed on powder samples with a particle size < 0.037 mm. The glass samples were heated at different rates in the temperature range 20-750?C. The kinetic parameters, activation energy for the crystallization process, Ec and Avrami exponent, n were calculated. Powder X-ray diffraction analysis (XRD) of crystallized glass reveals the presence of crystalline K2O?TiO2?3GeO2 indicating polymorphic crystallization with interface controlled crystal growth. Kinetika kristalizacije K2O?TiO2?3GeO2 stakla je proucavana primenom diferencijalno termijske analize (DTA). Eksperimenti su izvedeni na uzorcima stakla granulacije
ISSN:0350-820X
1820-7413
DOI:10.2298/SOS0803333G