Crystallization Behavior and Microstructure of B2O3-Al2O3-SiO2 Glass-Ceramics

Abstract:

Article Preview

The influences of B2O3/SiO2 ratio and different alkali earth metal oxides MO (M= Ba, Mg, Ca) on the crystallization behavior of B2O3-Al2O3-SiO2 (BAS) glass were investigated by means of DSC, XRD and SEM. With the reduction of B2O3/SiO2 ratio, the crystallization activation energy increases at first and then decreases, reaching the minimum value of 375.4 kJ·mol-1 when the B2O3/SiO2 ratio is 2.2. The crystalline indices (n) are all more than 4, which indicates that the glass is in bulk crystallization. When the glass was heated to 800°C, the primary precipitated crystalline phase was Al4B2O9. With the increase of temperature up to 1100°C, Al18B4O33 and Al5BO9 appeared and became the major crystalline phases in BAS glass-ceramics.

Info:

Periodical:

Edited by:

Yung-Jen Lin and Wen-Cheng J. Wei

Pages:

149-154

DOI:

10.4028/www.scientific.net/AMR.51.149

Citation:

H. N. Xiao et al., "Crystallization Behavior and Microstructure of B2O3-Al2O3-SiO2 Glass-Ceramics", Advanced Materials Research, Vol. 51, pp. 149-154, 2008

Online since:

June 2008

Export:

Price:

$35.00

In order to see related information, you need to Login.