Differential scanning calorimetry at hydrothermal conditions of amorphous materials prepared by drying sodium silicate solutions

被引：12

作者：

Roggendorf, H ^{[1
]}

Böschel, D ^{[1
]}

Rödicker, B ^{[1
]}

机构：

[1] Univ Halle Wittenberg, Inst Werkstoffwissensch, D-06099 Halle, Saale, Germany

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2001年 / 63卷 / 03期

关键词：

drying; glass transition; hydrothermal conditions; sodium silicate solution; thermal analysis;

D O I：

10.1023/A:1010167415775

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Concentrated sodium silicate solutions with a molar SiO2:Na2O ratio of 3.3 and a SiO2 content of 27 mass% were dried up to 63 d at temperatures between 40 and 100 degreesC to residual water contents between 12 and 38 mass%. The dried solid materials were investigated by differential scanning calorimetry (DSC). Pressure tight autoclave crucibles were applied to suppress evaporation and boiling of the samples during heating. Two thermal events are discussed with respect to glass transition.

引用

页码：641 / 652

页数：12

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