Device for testing the aperture of porous material and testing method thereof

Abstract

The invention provides a device for testing the aperture of a porous material. The device comprises: a lower chamber, wherein an air inlet and a first pressure detection port are formed in the side edge of the lower chamber, a first sample detection port is formed in the top of the lower chamber, an air inlet which is externally connected with an air inlet control device, a first pressure detection port which is externally connected with a first pressure sensor, and the opening of the first sample detection port is upward; and an upper chamber which is mounted and fixed above the lower chamber, wherein a liquid adding opening and a second pressure detection opening are formed in the side surface of the upper chamber. The invention further provides a corresponding testing method which has the beneficial effects that the dry-method detection and the wet-method detection of the porous material are completed on the same equipment in sequence, and only one piece of equipment is needed, so that the cost is saved; in addition, the wet method is carried out after the dry method is finished, and the porous material does not need to move, so that the dry method and the wet method are used for detecting at the same position of the porous material, deviation caused by movement is avoided, and the correctness of a final result is ensured.

Description

technical field [0001] The invention relates to a porous material pore diameter testing device and a testing method thereof. Background technique [0002] Porous material is a material with a network structure composed of interpenetrating or closed pores; porous material can improve mechanical properties such as strength and stiffness, while reducing density, so that it has certain advantages in aerospace and aviation industries; its performance in the early stage The detection of the porous structure is also an extremely important step. The main parameters of the porous structure are: porosity, average pore size, maximum pore size, etc., and the porous structure parameters and some performance properties (such as permeability, etc.) have multiple measurement principles and methods; Its detection is usually determined by the bubble method, gas permeation method, adsorption method and mercury pressure method. At present, the commonly used detection methods include the bubble ...

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Problems solved by technology

[0003] At present, the following problems exist in the detection of porous materials: First, the wet detection represented by the bubble method and the dry detection represented by the gas permeation method cannot be realized on the same device, and two corresponding devices are required to perform multiple measurements, resulting in high cost , low efficiency; second, both the dry method and the wet method need to detect the same position of the porous

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