Vpliv sinteznih pogojev na morfologijo in magnetne lastnosti SrFe12O19 nanodelcev

Učakar, Aleksander (author), Jenuš, Petra (co-mentor)

V diplomskem delu smo raziskovali vpliv sinteznih pogojev na obliko, velikost in magnetne lastnosti stroncij heksaferitnih nanodelcev. Stroncij heksaferit (SrFe12O19) smo sintetizirali s hidrotermalno metodo, katere cilj je izboljšanje magnetnih lastnosti (nasičeno in remanentno magnetizacijo ter koercitivnost) preiskovanega materiala v primerjavi z do sedaj doseženimi vrednostmi tako sintetiziranega SrFe12O19. S spreminjanjem temperature in časa sinteze se spreminja morfologija delcev in posledično tudi njihove magnetne lastnosti. Od temperature in časa sinteze je odvisna velikost nanodelcev kakor tudi čistost produkta, ki vpliva na magnetne lastnosti vzorcev. Magnetne lastnosti sintetiziranega materiala smo še dodatno izboljšali z žarjenjem.

• Language: Slovenian
• Keywords: stroncij heksaferit, magnetni nanodelci, hidrotermalna sinteza, VSM, XRD, SEM
• Work type: Bachelor thesis/paper
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Year: 2018
• PID: 20.500.12556/RUL-103791
• COBISS.SI-ID: 31820071
• Publication date in RUL: 26.09.2018

Secondary language

• Language: English
• Title: Influence of synthesis conditions on the morphology and magnetic properties of SrFe12O19 nanoparticles

Abstract

In this diploma work, we have been investigating the influence of synthesis parameters on the morphology, size and magnetic properties of strontium hexaferrite nanoparticles. Strontium hexaferrite (SrFe12O19) has been synthesised by hydrothermal method, the purpose of which was to enhance magnetic properties (saturation magnetization, remanence and coercivity) of the investigated material in comparison to recently obtained values. By changing the temperature and time of the synthesis we were able to tailor nanoparticles' morphology and by doing so their magnetic properties have changed. Temperature and time of the synthesis dictate particle size and purity of product material, which influences its magnetic properties. Further enhancement of the magnetic properties of strontium ferrite was achieved by annealing.

• Keywords: strontium hexaferrite, magnetic nanoparticles, hydrothermal synthesis, VSM, XRD, SEM