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master's thesis
Razvoj sinteze bez otapala uz pomoć planetarnog kugličnog mlina za Ca-Fe sustave složenih metalnih oksida
2020. urn:nbn:hr:182:712559
Bolić, Filip
Josip Juraj Strossmayer University of Osijek
Department of Chemistry

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Bolić, F. (2020). Razvoj sinteze bez otapala uz pomoć planetarnog kugličnog mlina za Ca-Fe sustave složenih metalnih oksida (Master's thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry. Retrieved from https://urn.nsk.hr/urn:nbn:hr:182:712559

Bolić, Filip. "Razvoj sinteze bez otapala uz pomoć planetarnog kugličnog mlina za Ca-Fe sustave složenih metalnih oksida." Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2020. https://urn.nsk.hr/urn:nbn:hr:182:712559

Bolić, Filip. "Razvoj sinteze bez otapala uz pomoć planetarnog kugličnog mlina za Ca-Fe sustave složenih metalnih oksida." Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2020. https://urn.nsk.hr/urn:nbn:hr:182:712559

Bolić, F. (2020). 'Razvoj sinteze bez otapala uz pomoć planetarnog kugličnog mlina za Ca-Fe sustave složenih metalnih oksida', Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, accessed 28 December 2024, https://urn.nsk.hr/urn:nbn:hr:182:712559

Bolić F. Razvoj sinteze bez otapala uz pomoć planetarnog kugličnog mlina za Ca-Fe sustave složenih metalnih oksida [Master's thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry; 2020 [cited 2024 December 28] Available at: https://urn.nsk.hr/urn:nbn:hr:182:712559

F. Bolić, "Razvoj sinteze bez otapala uz pomoć planetarnog kugličnog mlina za Ca-Fe sustave složenih metalnih oksida", Master's thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, Osijek, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:182:712559

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TitleRazvoj sinteze bez otapala uz pomoć planetarnog kugličnog mlina za Ca-Fe sustave složenih metalnih oksida
Title (english)Development of solvent-free synthesis using planetary ball mill for CaFe systems of complex metal oxides
AuthorFilip Bolić
MentorIgor Đerđ (mentor)
Committee memberMartina Medvidović-Kosanović (predsjednik povjerenstva)
Committee memberIgor Đerđ (član povjerenstva)
Committee memberBerislav Marković (član povjerenstva)
GranterJosip Juraj Strossmayer University of Osijek
Department of Chemistry
Osijek
Defense date and country2020-07-10, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Abstract
Perovskiti su spojevi opće formule ABX3 gdje je A kation većeg ionskog promjera, B kation manjeg ionskog promjera, a X kisikov ili halogenidni anion. U ovom su radu istraživani optimalni uvjeti za sintezu trostrukog perovskita \( Ca_{3}Fe_{2}WO_{9} \) sintetskom metodom bez otapala uz pomoć planetarog kugličnog mlina. Pri tomu za kation na A položaju odabran je \( Ca^{2+}\), B položaj dijele \( Fe^{3+}\) i \( WO^{6+}\) u omjeru 2:1, a na anionskom položaju nalazi se kisik Parametri koji su mijenjani s ciljem poboljšanja sintetskih uvjeta su brzina vrtnje mlina (100, 150, 200, 250, 500 i 750 okr/min) te vrijeme sinteze u razmacima od 10 min do ukupno 120 min. Dobiveni uzorci su kalcinirani na različitim temperaturama te analizirani termogravimetrijski (TGA), infracrvenom spektroskopijom (FT-IR) i rentgenskom difrakcijom na prahu (PXRD). Produkt sintetiziran pri 250 okr/min i vremenu od 10 minuta imao je najveći udio ciljanog spoja, čak 92 wt %. Veličina kristalita izračunata preko Scherrerove jednadžbe je iznosila 24 nm. Ciljani \( Ca_{3}Fe_{2}WO_{9} \) je po prvi put sintetiziran u nanokristalitnom obliku.
Abstract (english)
Perovskites are compounds of general formula ABX3 where A is a cation of a larger ionic diameter, B is a cation of a smaller ionic diameter and X stands for oxygen or halide anions. In this thesis optimal conditions for a synthesis of a triple perovskite \( Ca_{3}Fe_{2}WO_{9} \) using solvent-free method by means of planetary ball mill were investigated. As it can be seen, as A site cation \( Ca^{2+}\) was chosen, \( Fe^{3+}\) and \( WO^{6+}\) share the B site in 2:1 ratio and oxygen anion was chosen for anionic site. Parameters which have been varied in the attempt to optimize synthesis conditions are rotational speed (100, 150, 200, 250, 500 and 750 rpm) and synthesis time in intervals of 10 minutes up to 120 minutes. Obtained samples were calcined at different temperatures and analyzed by thermogravimetric analysis (TGA), infrared spectroscopy (FT-IR) and powder X-ray diffraction (PXRD). Product synthesized at 250 rpm for 10 minutes contained 92 wt% of the targeted compound. Crystallite size calculated from the Scherrer equation was 24 nm. Targeted \( Ca_{3}Fe_{2}WO_{9} \) has been synthesized in nanocrystalline form for the first time.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:182:712559
ProjectNumber: HRZZ-IP-2016-06-3115
Title: Istraživanje složenih multiferoičnih materijala pripravljenih metodama otopinske kemije
Leader: Igor Đerđ
Jurisdiction: Croatia
Funder: HRZZ
Study programmeTitle: Graduate University Study of Chemistry; research direction
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra kemije (magistar/magistra kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2020-10-28 11:45:09