Omejena difuzija v poroznih snoveh

Kosmač, Domen (author), Mohorič, Aleš (mentor), Bajd, Franci (comentor)

V tem delu se osredotočim na merjenje omejene difuzije z jedrsko magnetno resonanco (NMR). V prvem delu je opis difuzije in omejene difuzije. Sledijo osnove NMR in opis meritev. Opisani so tudi elementi merilnega sistema z NMR. Predstavljene so meritve omejene difuzije v homogenem izotropnem vzorcu ter v heterogenem izotropnem vzorcu in anizotropnem vzorcu. Iz meritve lahko sklepamo na mikroskopsko strukturo vzorca, usmerjenost podolgovatih por in njihovo velikost.

• Language: Slovenian
• Keywords: Difuzija, omejena difuzija, NMR, PGSE, anizotropna difuzija
• Work type: Final paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FMF - Faculty of Mathematics and Physics
• Year: 2017
• PID: 20.500.12556/RUL-97779
• COBISS.SI-ID: 3146596
• Publication date in RUL: 10.11.2017

Secondary language

• Language: English
• Title: Restricted diffusion in porous media

Abstract

This work focuses on measuring diffusion with nuclear magnetic resonance (NMR). First part describes diffusion and restricted diffusion. Next, follow the basics of NMR and description of measurements. The elements of the measuring system with NMR are also described. Presented are measurements of bulk diffusion in isotropic sample as well as restricted diffusion in isotropic and anisotropic sample. From the measurements we can infer the microscopic structure of the sample, the orientation of oblong pores and their size.

• Keywords: Diffusion, restricted diffusion, NMR, PGSE, anisotropic diffusion