magistrsko delo
Tilen Švarc (Author), Matej Zadravec (Mentor), Rebeka Rudolf (Co-mentor)

Abstract

Magistrsko delo obsega proces sinteze nanokompozita Ni/Y2O3 z ultrazvočno razpršilno pirolizo in liofilizacijo, študijo vpliva tehnoloških parametrov na sestavo delcev nanokompozita Ni/Y2O3 in vpliva stabilizatorja na potek sušenja. Za karakterizacijo nanokompozita so bile uporabljene naslednje tehnike: analiza z induktivno sklopljeno plazmo z masnim spektrometrom, vrstična elektronska mikroskopija, energijsko disperzijska spektroskopija, presevna elektronska mikroskopija, CIELAB meritve barve in optična mikroskopija. Suspenzija nanokompozita je bila analizirana s pomočjo dinamičnega sipanja svetlobe. Raziskan je bil vpliv koncentracije vhodnih surovin itrijeva in nikljeva nitrata pri nespremenjenih procesnih pogojih na kemijsko sestavo in velikost delcev nanokompozita Ni/Y2O3. Ugotovljeno je bilo, da povečana koncentracija stabilizatorja v procesu ultrazvočne razpršilne pirolize vpliva na bolj homogeno porazdelitev delcev nanokompozita Ni/Y2O3 v končnem osušenem materialu. Povečanje koncentracije stabilizatorja vpliva na daljši čas sušenja v procesu liofilizacije, saj so eksperimenti potrdili, da se suspenzija delcev nanokompozita Ni/Y2O3 z nižjo koncentracijo stabilizatorja posuši bistveno hitreje.

Keywords

ultrazvočna razpršilna piroliza;liofilizacija;nanokompozit;karakterizacija;magistrske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FS - Faculty of Mechanical Engineering
Publisher: [T. Švarc]
UDC: 620.168:620.3(043.2)
COBISS: 120974851 Link will open in a new window
Views: 62
Downloads: 22
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Other data

Secondary language: English
Secondary title: Process for the synthesis of Ni/Y2O3 nanocomposites by ultrasonic spray pyrolysis and lyophilization
Secondary abstract: The master's thesis deals with the synthesis process of Ni/Y2O3 nanocomposite by ultrasonic spray pyrolysis and lyophilization, a study of the influence of technological parameters on the composition of Ni/Y2O3 nanocomposite particles, and the influence of the stabilizer on the drying process. The following techniques were used to characterize the nanocomposite: inductively coupled plasma mass spectrometer analysis, scanning electron microscopy, energy dispersive spectroscopy, transmission electron microscopy, CIELAB colour measurements, and optical microscopy. The nanocomposite suspension was analysed by dynamic light scattering. The influence of the concentration of the input raw materials yttrium and nickel nitrate under unchanged process conditions on the chemical composition and particle size of the Ni/Y2O3 nanocomposite was investigated. It was found that the increased concentration of the stabilizer in the ultrasonic spray pyrolysis process affects a more homogeneous distribution of Ni/Y2O3 nanocomposite particles in the final dried material. An increase in the concentration of the stabilizer affects a longer drying time in the lyophilization process, as experiments confirmed that the suspension of Ni/Y2O3 nanocomposite particles with a lower concentration of the stabilizer dries significantly faster.
Secondary keywords: ultrasonic spray pyrolysis;lyophilization;nanocomposite;characterization;
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za strojništvo, Energetsko procesno in okoljsko strojništvo
Pages: 1 spletni vir (1 datoteka PDF (XII, 60 f.))
ID: 16222596