BS ISO 15901-1-2006 用水银孔率法和气体吸附法测定固体材料的孔隙尺寸分布和孔隙率.水银孔率法

标准号：BS ISO 15901-1-2006
中文标准名称：用水银孔率法和气体吸附法测定固体材料的孔隙尺寸分布和孔隙率.水银孔率法
英文标准名称：Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption - Mercury porosimetry
标准类型：A42
发布日期：2006/1/23 12:00:00
实施日期：2006/1/23 12:00:00
中国标准分类号：A42
国际标准分类号：19.120
适用范围：This International Standard describes a method for the evaluation of the pore size distribution and the specificsurface in pores of solids by mercury porosimetry according to the method of Ritter and Drake [1], [2]. It is acomparative test, usually destructive due to mercury contamination, in which the volume of mercurypenetrating a pore or void is determined as a function of an applied hydrostatic pressure, which can be relatedto a pore diameter.Practical considerations presently limit the maximum applied absolute pressure to about 400 MPa(60 000 psia) corresponding to a minimum equivalent pore diameter of approximately 0,003 μm.The maximum diameter will be limited for samples having a significant depth due to the difference inhydrostatic head 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 interparticle and intraparticle porosity. In general, it cannotdistinguish between these porosities where they co-exist.The method is suitable for the study of most non-wettable, by mercury, porous materials. Samples thatamalgamate with mercury, such as certain metals, e.g. gold, aluminium, reduced copper, reduced nickel andsilver, can be unsuitable for this technique or can require a preliminary passivation. Under the appliedpressure, some materials are deformed, compacted or destroyed, whereby open pores can be collapsed andclosed pores opened. In some cases, it is possible to apply sample compressibility corrections and usefulcomparative data can still be obtained. For these reasons, the mercury porosimetry technique is considered tobe comparative.