标准编号：ISO 15901-1:2016
中文名称：水银孔率法和气体吸收法测定固体材料的孔径分布和孔隙度 第1部分：压汞法
英文名称：Evaluation of pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption — Part 1: Mercury porosimetry
发布日期：2016-04
标准范围
This International Standard describes a method for the evaluation of the pore size distribution andthe specific surface area of pores in solids by mercury porosimetry according to the method of Ritterand Drake[1][2]. It is a comparative test, usually destructive due to mercury contamination, in whichthe volume of mercury penetrating a pore or void is determined as a function of an applied hydrostaticpressure, which can be related to a pore diameter.Practical considerations presently limit the maximum applied absolute pressure to about 400 MPa(60 000 psi) corresponding to a minimum equivalent pore diameter of approximately 4 nm. Themaximum diameter is limited for samples having a significant depth due to the difference in hydrostatichead of mercury from the top to the bottom of the sample. For the most purposes, this limit can beregarded as 400 μm. The measurements cover inter-particle and intra-particle porosity. In general,without additional information from other methods it is difficult to distinguish between these porositieswhere they co-exist. The method is suitable for the study of most porous materials non-wettable bymercury. Samples that amalgamate with mercury, such as certain metals, e.g. gold, aluminium, copper,nickel and silver, can be unsuitable with this technique or can require a preliminary passivation. Underthe applied pressure some materials are deformed, compacted or destroyed, whereby open pores maybe collapsed and closed pores opened. In some cases it may be possible to apply sample compressibilitycorrections and useful comparative data may still be obtainable. For these reasons, the mercuryporosimetry technique is considered to be comparative.
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