CaO-Al2O3-SiO2系烧结微晶玻璃的结晶过程 |
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作者单位: | :清华大学 材料科学与工程系, 北京 100084 |
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摘 要: | To control the
quatity, grain size and morphology of crystals in glass-ceramics, relative crystallinity
of CaO-Al2O3-SiO2 sintered glass-ceramics was determined
using XRD method. The crystallization at different temperature range was studied by SEM.
The results indicate that sintering at low temperature (below 900 ℃), crystals
originate at the interface of glass particles and grow toward the inside of particles.
There was no crystallization taken place within particles and the crystallinity was
relatively low. Higher crystallinity can be obtained at mid temperature range (900~1 050 ℃)
when crystallization takes place both at and within the interface of glass particles. The
crystallinity tends to decrease at high temperature range (1 050~1 100 ℃) due to
the rapid sintering and drop of driving force for phase transformation.
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关 键 词: | 结晶率 微晶玻璃 烧结 |
修稿时间: | 1998-10-29 |
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