졸-겔법에 의한 Li₂O·AI₂O₃·4SiO₂ 조성의 괴상겔 및 결정화유리의 합성 : 2. 괴상겔의 소결 및 결정화 2. Crystallization and Heat-Treatment Monolithic Gel = Preparation of Li_(2)O·AI_(2)O_(3)·4SiO_(2) Glass-Ceramic Monolith from Metal-Alkoxide Solution

다국어 초록 (Multilingual Abstract)

The crystallization and sintering behavior and the linear thermal expansion properties of glass-ceramic of low thermal expansion in the Li_(2) O-Al_(2)O_(3)-SiO_(2) system prepared by multicomponent dried gel of composition Li_(2)O·Al_(2)O_(3)·4 SiO_(2) have been investigated.
The results were as follows:
1) β-eucryptite-quartz and spodumene-quartz solid solution and Li_(2)O·Al_(2)O_(3)·3 SiO_(2) crystals were detected in sintered monolithic specimen heated above 750℃.
2) Within the temperature range of 0-500℃, the thermal expasion coefficient of the sintered specimen at 700℃ was shown as 49.6×10^(-7)/℃, and the crystallized specimens were shown as 0 -6.0×10^(-7)/℃, respectively.
3) Dilatometric measurement on the gel has shown that a large and sharp thermal shrinkage was found to begin at 600℃ to about 900℃.