The expansion of porous glass on the adsorption of non-polar gases
The expansion of porous glass on the adsorption of non-polar gases
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多孔玻璃的膨胀对非极性气体的吸附
DOI：
10.1098/rspa.1954.0177
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发表时间：
1954
期刊：
影响因子：
--
通讯作者：
D. Yates
中科院分区：
文献类型：
--
作者：
D. Yates
本文介绍了一种高灵敏度的绝对膨胀计的设计和结构，它可用来测量液体-空气温度下非极性气体在多孔玻璃上吸附所引起的小膨胀。用这种仪器测量的膨胀是第一次用刚性吸附剂记录的，在这种情况下，吸附肯定是物理性质的。报道了用氩气、氮气、氧气、氢气和氪气作为吸附物的实验。从大气中吸附到玻璃上的有机物的效果，未知的组合物，对膨胀特性的指示。描述了一种在不影响玻璃面积的情况下原位去除这种有机物的技术。实验结果证实了作者（Yates 1952）导出的吸附剂体积膨胀率公式（Δ F/Δ V）T = -3/2K的正确性，其中Δ V是由于Δ F（表面自由能降低）引起的恒温体积膨胀率，K是吸附剂的体积弹性模量。
The design and construction of an absolute dilatometer of high sensitivity to measure the small expansions resulting from the adsorption of non-polar gases on to porous glass at liquid-air temperatures are described. The expansions measured with this instrument are the first recorded with a rigid adsorbent for the case in which the adsorption is, with certainty, physical in nature. Experiments in which the gases argon, nitrogen, oxygen, hydrogen and krypton were used as adsorbates are reported. The effect of organic matter adsorbed on to the glass from the atmosphere, of unknown composition, on the expansion characteristics is indicated. A technique for the removal of this organic matter in situ without affecting the area of the glass is described. The results have confirmed the correctness of an equation which has been derived by the author (Yates 1952) (∂F/∂V)T = –3/2K, where ∂V is the volumetric expansion at constant temperature resulting from ∂F, the surface free energy lowering, and where K is the bulk modulus of the adsorbent.