Crystallization Behavior and Microstructure of B2O3-Al2O3-SiO2 Glass-Ceramics
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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.
2008 ◽
Vol 368-372
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pp. 1415-1418
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2009 ◽
Vol 145
(3)
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pp. 468-474
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1991 ◽
Vol 99
(1148)
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pp. 341-343
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2014 ◽
Vol 636
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pp. 69-72
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1994 ◽
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pp. 374-377
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1990 ◽
Vol 63
(4)
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pp. 1221-1225
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