METHOD OF MEASURING DISTRIBUTION OF PORES ACCORDING TO SIZES Russian patent published in 1994 - IPC

FIELD: test equipment. SUBSTANCE: speed and time of discharge with free access of gas preset mass, which is present in pressure-tight chamber under excess pressure, through dry and impregnated specimens at the same pressure changes onto the specimens. Distribution of pores according to sizes is calculated from the relation Σ F_iF_Σ=W_ci·T_ci/W_прi·T_прi, where Σ F_i is total area of open pores at i-th voltage difference in the specimen impregnated by fluid; F_Σ is total area of through pores with all the sizes in material; W_ci, W_прi are speeds of the gas through dry specimen and specimen impregnated by fluid at i-th pressure difference at the specimens; T_ci, T_прi is time of efflux of preset mass through dry and impregnated specimens at i-th pressure difference at them. EFFECT: improved precision of measurement.