Crystallisation Of Zno From Supercooled Melts And Glasses

The aim of this study is to achieve the crystallization of ZnO as a primary phase from multicomponent supercooled oxide melts after additional heat treatment. Different compositions containing 70-80 mol% ZnO were selected. Transition metal oxides V2O5, WO3 and MoO3 were added to decrease the melting temperature below 1400 deg C. In order to improve glass formation tendency up to 20 mol% B2O3 and SiO2 were added. SEM observations indicate that microsized ZnO crystals with different morphologies were dispersed in an amorphous matrix. According to DTA data, the glass transition temperature is in the range 340-350 deg C and crystallization temperature is near 650 deg C. It was suggested that ZnO takes part in the formation of the amorphous network by four-fold coordinated polyhedra. The synthesized products are potential candidates for the preparation of new functional materials

Author
Y Dimitriev Et Al
Origin
University Chem Technol & Metallurgy, Bulgaria
Journal Title
Phys Chem Glasses 53 6 Dec/2012 254-263
Sector
Special Glass
Class
S 3961

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Crystallisation Of Zno From Supercooled Melts And Glasses
Phys Chem Glasses 53 6 Dec/2012 254-263
S 3961
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