Publikace detail

Crystallization kinetics of the Y3Al5O12 glass

Autoři: Chovanec Jozef | Svoboda Roman | Kraxner Jozef | Cerna Andrea | Galusek Dusan

Rok: 2017

Druh publikace: článek v odborném periodiku

Název zdroje: Journal of Alloys and Compounds

Název nakladatele: Elsevier Science SA

Místo vydání: Lausanne

Strana od-do: 792-799

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	Krystalizační kinetika Y3Al5O12 skla	Skla byla připravena z YAG prekurzoru Pechiniho metodou. Jejich krystalizace poté byla studována metodou DSC. Získané krystalizační píky byly dekonvoluovány na dva překrývající se procesy, jejichž kinetická data byla získána analýzou.	YAG; amorfní Y3Al5O12; sol-gel proces; kinetika krystalizace; DSC
eng	Crystallization kinetics of the Y3Al5O12 glass	Crystallization of glass prepared by flame technique from a crystalline YAG precursor synthesized by Pechini method was studied under noneisothermal conditions by differential scanning calorimetry. The crystallization peaks were mathematically deconvoluted into two peaks representing two overlapping thermal effects. These two peaks were examined in terms of the nucleationegrowth Johnson-Mehl -Avrami model, autocatalytic Sestak - Berggren model and Malek z(alpha) and y(alpha) functions. At lower heating rates, the only process in the system was volume crystallization with the apparent activation energy of 555 +/- 37 kJ* mol(-1).At higher heating rates, partial change of crystallization mechanism was observed with significant contribution of surface crystallization and the activation energy of 606 +/- 31 kJ* mol(-1)	Yttrium aluminium garnet; Amorphous of Y3Al5O12; Sol-gel processes (Pechini method); Crystallization kinetics; DSC

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