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Innovation application: Analysis of Pore Structure of Solids

Title Analysis of Pore Structure of Solids

In the low- (2 stations) and one high pressure section of mercury porosimetry using intrusion of mercury in the open pores is possible to determine porosity, pore size distribution in range 0.006 – 1000 µm, cumulative and differential pores volume, cumulative and differential specific surface area and turtuosity (coefficient of pore shape). The both low pressure stations don’t work simultaneously.

Keywords porous ceramic, filters, membranes, catalysts, concrete, gypsum materials, ceramic implants, electrodes
Authors Ruta Švinka
Gundars Mežinskis
Department (14100) Silikātu materiālu institūts
Statistical Classification of Economic Activities, NACE 2 Scientific research and development
Other professional, scientific and technical activities
Description of the technology

Solid prismatic or cylindrical dried sample that sample size does not exceed 0.5 cm (diameter) and 2 cm (height) and mass is up to 0.5 – 1.0 g is placed in the sample holder. After that sample holder is sealed tightly and placed in the low pressure station of mercury porosimeter. Station will be hermetically sealed and the further analysis process takes place automatically. After reaching maximum pressure and following process of extrusion that low pressure station stops functioning, sample holder together with sample will be placed in the high pressure station. In this station pressure is provided system of hydraulic oil.

Fig. 1. Mercury porosimeter «Pore Master 33», Quantachrome Instruments (pore size from 0,064 to 950 mkm).

In the data operating system the intrusion and extrusion curves are combined. The data processing is based on intrusion curves. The computer program produces both graphical and numerical results.

Applications Obtained results are usable for the analysis of pore structure of solid porous materials and depending on the nature of the material and its use the main the required characteristic may be pore size and distribution (for implants, filters, building ceramic, concrete, gypsum materials, thermal insulating materials), specific surface area (for example catalysts, membrane, sorbents), pore volume (for example catalysts, implants, thermal insulating materials). Porosity is a main characteristic property for every one solid material.

The mercury porosimetry is currently the only one method for the investigation and analysis of pore structure of solids. At the same time obtained results covers other important features of porous solids. The analysis of material by use of mercury porosimetry could be carried out during 1.5 hours.

Technology Readiness Level Actual system proven in operational environment
Partnership offer • Service contracts for material testing. • Research contracts. • Scientific collaboration contracts.
ID 106
Contact information email: santa.puskarjova@rtu.lv and ilmars.viksne@rtu.lv; phone number: +371 29373757 un +371 29187403