Thermal behavior of a mineral mixture of sepiolite and dolomite
Thermal behavior of a mineral mixture of sepiolite and dolomite
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DOI：
10.1007/s10973-005-7459-0
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发表时间：
2007-06-01
影响因子：
4.4
通讯作者：
Sarikaya, Y.
中科院分区：
文献类型：
--
作者：
Yener, Nilguen;Onal, Mueserref;Sarikaya, Y.
将取自Beypazan（安卡拉，土耳其）地区的工业原料在100-1100 ℃区间的不同温度下加热2小时。通过粒度分布分析确定，在保持24小时的材料的水悬浮液中直径小于2 μ m的颗粒的体积百分比为85%。通过使用X射线衍射（XRD）和热分析（TG、DTA）数据获得材料的矿物组成为81%海泡石、15%白云石和4%颗粒间水的质量%。在海泡石中，颗粒间水和沸石水脱水的温度范围确定为25-340 ℃，结合水脱水的温度范围确定为340-580 ℃，羟基脱羟基的温度范围确定为800-833 ℃。根据海泡石的脱水和脱羟基过程，讨论了海泡石的比表面积（S/m（2）g（-1））和比微孔和比中孔容（V/cm（3）g）随温度升高的“之”形变化。
An industrial raw material taken from Beypazan (Ankara, Turkey) region was heated at different temperatures in the 100-1100 degrees C interval for 2 h. The volumetric percentage of particles having diameter below 2 mu m in an aqueous suspension of the material held 24 h were determined as 85% by the particle size distribution analysis. The mineralogical composition of the material was obtained as mass% of 81% sepiolite, 15% dolomite, and 4% interparticle water by using the X-ray diffraction (XRD) and thermal analysis (TG, DTA) data. The temperature ranges were determined for the dehydrations of the interparticle water and the zeolitic water as 25-340 degrees C, for the dehydration of the bound water as 340-580 degrees C, and for the dehydroxylation of the hydroxyls as 800-833 degrees C in the sepiolite. The zig-zag changes in the specific surface area (S/m(2) g(-1)) and specific micro- and mesopore volume (V/cm(3) g) with the temperature increases were discussed according to the dehydrations and dehydroxylation of the sepiolite.