標準號：BS ISO 15901-1-2006
中文標準名稱：用水銀孔率法和氣體吸附法測定固體材料的孔隙尺寸分布和孔隙率.水銀孔率法
英文標準名稱：Pore size distribution and porosity of solid materials by mercury porosimetry and gas adsorption - Mercury porosimetry
標準類型：A42
發布日期：2006/1/23 12:00:00
實施日期：2006/1/23 12:00:00
中國標準分類號：A42
國際標準分類號：19.120
適用范圍：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.