Naslov
The influence of B2O3 on the crystallization kinetics in zinc-aluminosilicate glasses

Autori
Ivanković, Hrvoje ; Kurajica, Stanislav ; Tkalčec, Emilija

Izvornik
Glastechnische Berichte - Glass Science & Technology (0946-7475) 75(S) (2002); 314-317

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
crystallization mechanism; zinc-aluminosilicate glass; B2O3
(crystallization mechanism; zinc-aluminosilicate glass; B2O3; zinc-petalite)

Sažetak
The influence of B2O3 on crystallization mechanism and on nucleation and growth parameters of gahnite in ZnO-Al2O3-SiO2 glasses, containing TiO2 as nucleating agents, was studied by differential scanning calorimetry (DSC) and X-ray diffraction (XRD). In the glasses without B2O3, the crystallization of gahnite (ZnAl2O4) is preceded by formation of metastable zinc-petalite (Zn0.5Al1.2Si1.8O6), which later decomposes into beta-quartz solid solution. By adding B2O3, the crystallization of gahnite as the main phase is shifted to lower temperatures. The overlapping of nucleation and crystallization has been reflected on the activation energy obtained using Kissinger equation.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA