SINTERING AND CRYSTALLIZATION BEHAVIOR OF BAO-AL2O3-SIO2 AND BAO-ZNO-AL2O3-SIO2 XEROGEL POWDERS

被引：0
|
作者：
DU, YJ [1 ]
HOLLAND, D [1 ]
PITTSON, R [1 ]
机构：
[1] GWENT ELECTR MAT, PONTYPOOL NP4 0HZ, GWENT, WALES
来源：
PHYSICS AND CHEMISTRY OF GLASSES | 1993年 / 34卷 / 03期
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D O I：
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中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Homogeneous xerogel powders in the BaO-Al2O3-SiO2 and BaO-ZnO-Al2O3-SiO2 systems were prepared by chemical polymerisation in a sol-gel process. Their sintering behaviour and crystallisation characteristics have been investigated as a function of temperature, time, and composition. The BAS system requires a sintering temperature of 900-960-degrees-C and the BZAS system 840-900-degrees-C to achieve reasonable densities-up to 97%. The BAS system produced hexagonal BAS2 and BS2 phases on devitrification. The BZAS system gave celsian and hexagonal BAS2 and the presence of ZnO facilitated the formation of celsian.
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页码：104 / 108
页数：5
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