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master's thesis
Reološka svojstva Al2O3 suspenzija koje sadrže otpadni grafit
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. urn:nbn:hr:235:570642
Gagulić, Antonio
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

Institutional repository: Repository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb

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Gagulić, A. (2023). Reološka svojstva Al2O3 suspenzija koje sadrže otpadni grafit (Master's thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:570642

Gagulić, Antonio. "Reološka svojstva Al2O3 suspenzija koje sadrže otpadni grafit." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:570642

Gagulić, Antonio. "Reološka svojstva Al2O3 suspenzija koje sadrže otpadni grafit." Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2023. https://urn.nsk.hr/urn:nbn:hr:235:570642

Gagulić, A. (2023). 'Reološka svojstva Al2O3 suspenzija koje sadrže otpadni grafit', Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 11 August 2024, https://urn.nsk.hr/urn:nbn:hr:235:570642

Gagulić A. Reološka svojstva Al2O3 suspenzija koje sadrže otpadni grafit [Master's thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2023 [cited 2024 August 11] Available at: https://urn.nsk.hr/urn:nbn:hr:235:570642

A. Gagulić, "Reološka svojstva Al2O3 suspenzija koje sadrže otpadni grafit", Master's thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:235:570642

Metadata
TitleReološka svojstva Al2O3 suspenzija koje sadrže otpadni grafit
Title (english)Rheological properties of Al2O3 suspensions which contain waste graphite
AuthorAntonio Gagulić
MentorLidija Ćurković (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2023-07-20, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
General Mechanical Engineering (Construction)
Abstract
U postupku oblikovanja keramike lijevanjem suspenzije reološki dijagrami tečenja su ključni kako bi se postigla potpuna kontrola reoloških svojstava keramičkih suspenzija, a time i njihova stabilnost. U tu svrhu, snimaju se krivulje tečenja pripravljenih suspenzija: ovisnosti viskoznosti (η) o brzini smicanja (γ) te ovisnosti smičnog naprezanja (τ) o brzini smicanja (γ). U radu su pripravljene 60 %-tne vodene Al2O3 suspenzije s masenim udjelom 0 %, 1 %, 5 % i 10 % otpadnog grafita te uz dodatak odgovarajućih aditiva (disperzanta i veziva). Otpadni grafit smatra se prikladnim materijalom kao žrtvena faza u ovoj metodi dobivanja porozne keramike budući da je ekološki prihvatljiv, niske cijene, omogućuje dobru kontrolu poroznosti i dobro izgara pri visokim temperaturama, čime osigurava dobru poroznost. Nakon priprave suspenzija, slijedila je homogenizacija te ispitivanje reoloških svojstava snimanjem krivulja tečenja: ovisnost viskoznosti o brzini smicanja te ovisnost smičnog naprezanja o brzini smicanja. Na temelju dobivenih rezultata ispitivanja, utvrđen je utjecaj dodatka aditiva i otpadnog grafita na reološka svojstva 60 %-tnih Al2O3 suspenzija.
Abstract (english)
In the process of forming ceramics by slip casting rheological flow diagrams are crucial to achieve complete control of the rheological properties of the suspension and thus the stability of the suspension. For this purpose, the flow curves of the dependence of viscosity (η) on the shear rate (γ) and the dependence of the shear stress (τ) on the shear rate (γ) are examined. In this work, 60% aqueous Al2O3 suspensions with a mass fraction of 0 wt. %, 1 wt. %, 5 wt. % and 10 wt. % of waste graphite were prepared, with the addition of appropriate additives (dispersant and binder). Waste graphite is considered a suitable material as a sacrificial phase in this method of obtaining porous ceramics since it is environmentally friendly, low cost, allows good porosity control and burns well at high temperatures, thus ensuring good porosity. After preparation of the suspensions, homogenization was performed, and rheological properties were determined by recording flow curves of viscosity dependence on shear rate and shear stress dependence on shear rate. Based on the obtained test results, the influence of the addition of additives and waste graphite on the rheological properties of 60% Al2O3 suspensions was determined.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:570642
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2023-07-18 10:35:59