Sintering, Crystallization, and Properties of B2O3/P2O5-Doped Li2O·Al2O3·4SiO2 Glass-Ceramics
Sintering, Crystallization, and Properties of B2O3/P2O5-Doped Li2O·Al2O3·4SiO2 Glass-Ceramics
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DOI：
10.1111/j.1151-2916.1995.tb08630.x
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发表时间：
1995-08
影响因子：
3.9
通讯作者：
J. Shyu;Hsin-Hui Lee
中科院分区：
文献类型：
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作者：
J. Shyu;Hsin-Hui Lee
li2o3的烧结、结晶、显微结构和热膨胀。研究了掺杂b2o3、p2o5或（b2o3 + p2o5）的二氧化硅微晶玻璃。在加热玻璃粉压坯时，玻璃相首先结晶为高石英s.s，结晶基本完成后转变为β-锂辉石。讨论了掺杂剂对玻璃向高石英硅晶化和高石英硅向β-锂辉石转变的影响。由于结晶速度快，主要致密化只发生在烧结初期。所有的掺杂剂都促进了玻璃粉末的致密化。掺杂对致密化的影响可以很好地用结晶倾向来解释。所有样品加热到950°C时，热膨胀系数为负，范围约为-4.7x10 -6至-0.1x10 - 6k -1。b2o3和p2o5的共掺杂导致了最高的致密化和极低的热膨胀系数
Sintering, crystallization, microstructure, and thermal expansion of Li 2 O.Al 2 O 3 .4SiO 2 glass-ceramics doped with B 2 O 3 , P 2 O 5 , or (B 2 O 3 +P 2 O 5 ) have been investigated. On heating the glass powder compacts, the glassy phase first crystallized into high-quartz s.s., which transformed into β-spodumene after the crystallization process was essentially complete. The effects of dopants on the crystallization of glass to high-quartz s.s. and the subsequent transformation of high-quartz s.s. to β-spodumene were discussed. The major densification occurred only in the early stage of sintering time due to the rapid crystallization. All dopants were found to promote the densification of the glass powders. The effect of doping on the densification can fairly well be explained by the crystallization tendency. All samples heated to 950°C exhibited a negative coefficient of thermal expansion ranging from about -4.7x10 -6 to -0.1x10 -6 K -1 . Codoping of B 2 O 3 and P 2 O 5 resulted in the highest densification and an extremely low coefficient of thermal expansion