[石膏粘结包埋材料的热行为。（第2部分）凝固石膏的烧结现象（作者译）]
[Thermal behavior of gypsum bonded investments. (Part 2) Sintering phenomena of set plaster (author's transl)].
作者信息
Tasaki Y
出版信息
Shika Rikogaku Zasshi. 1979 Apr;20(50):69-73.
The sintering phenomena of set plaster on the heating process have been investigated by measuring shrinkage and apparent density and by observing the structure of fractured surface with SEM. As a result, it was found that the sintering shrinkage occurred in two stages for the temperature range from 500 degrees C to 900 degrees C. In the first stage between 500 degrees C and 800 degrees C, the skelton of needle-like crystals of gypsum remained and micro-grains were observed in it. In the second stage between 800 degrees C and 900 C, the skelton disappeared and the grain growth was remarkable. In addition, the rate of shrinkage was slow in the first stage, and was very fast in the second stage.
通过测量收缩率和表观密度，并利用扫描电子显微镜观察断口结构，对凝固石膏在加热过程中的烧结现象进行了研究。结果发现，在500℃至900℃的温度范围内，烧结收缩分两个阶段发生。在500℃至800℃的第一阶段，石膏针状晶体的骨架保留，其中观察到微晶。在800℃至900℃的第二阶段，骨架消失，晶粒生长显著。此外，收缩率在第一阶段较慢，在第二阶段非常快。
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