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undergraduate thesis
Karakterizacija koloidnih Al2O3 suspenzija koje sadrže reciklirani prah
Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2017. urn:nbn:hr:235:618659
Čujić, Iva
University of Zagreb
Faculty of Mechanical Engineering and Naval Architecture

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Čujić, I. (2017). Karakterizacija koloidnih Al2O3 suspenzija koje sadrže reciklirani prah (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:235:618659

Čujić, Iva. "Karakterizacija koloidnih Al2O3 suspenzija koje sadrže reciklirani prah." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2017. https://urn.nsk.hr/urn:nbn:hr:235:618659

Čujić, Iva. "Karakterizacija koloidnih Al2O3 suspenzija koje sadrže reciklirani prah." Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, 2017. https://urn.nsk.hr/urn:nbn:hr:235:618659

Čujić, I. (2017). 'Karakterizacija koloidnih Al2O3 suspenzija koje sadrže reciklirani prah', Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, accessed 19 April 2024, https://urn.nsk.hr/urn:nbn:hr:235:618659

Čujić I. Karakterizacija koloidnih Al2O3 suspenzija koje sadrže reciklirani prah [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture; 2017 [cited 2024 April 19] Available at: https://urn.nsk.hr/urn:nbn:hr:235:618659

I. Čujić, "Karakterizacija koloidnih Al2O3 suspenzija koje sadrže reciklirani prah", Undergraduate thesis, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, 2017. Available at: https://urn.nsk.hr/urn:nbn:hr:235:618659

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Metadata
TitleKarakterizacija koloidnih Al2O3 suspenzija koje sadrže reciklirani prah
Title (english)Characterization of Al2O3 colliodal suspensions which contain recycled alumina powder
AuthorIva Čujić
MentorLidija Ćurković (mentor)
GranterUniversity of Zagreb
Faculty of Mechanical Engineering and Naval Architecture
Zagreb
Defense date and country2017-09-29, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Mechanical Engineering
Abstract
U radu je ispitana mogućnost korištenja sekundarnog Al2O3 praha kao zamjene za dio primarnog praha sa svrhom recikliranja i uštede. Sekundarni prah nastaje kao otpad tijekom strojne obrade sirovca od aluminijeve oksidne (Al2O3) keramike i obično se dalje ne koristi. Za tehnologiju oblikovanja izabrano je lijevanje suspenzija, kao ekološki i ekonomski prihvatljiva varijanta. Pripravljene su tri skupine 60 %-tnih suspenzija, u kojima je variran međusobni omjer primarnog i sekundarnog praha. Kao disperzant korišten je DOLAPIX CE 64, poli(etilen-glikol) (PEG) kao vezivo te magnezijev klorid heksahidrat (MgCl2×6H2O) kao tvar za sprječavanje abnormalnog rasta zrna. Suspenzije su pripravljene homogenizacijom u planetarnom kugličnom mlinu i tretirane u ultrazvučnoj kupelji. Reološka svojstva (viskoznost, smično naprezanje) određena su na rotacijskom viskozimetru. Utvrđeno je da je zamjenom dijela primarnog Al2O3 praha sekundarnim moguće dobiti stabilne suspenzije. Povećanjem sadržaja sekundarnog praha povećava se viskoznost suspenzije
Abstract (english)
In this paper, the use of secondary Al2O3 powder as a partial replacement for primary powder was investigated, in order to recycle and preserve resources. The secondary powder is produced as a result of the green machining of alumina and usually isn’t used any further. Slip casting was used, as an eco-friendly and economically acceptable forming technology. Three groups of suspensions with 60 wt. % of dry powder were prepared. The ratio of primary and secondary powder was varied. DOLAPIX CE 64 was used as a dispersant, polyethylene glycol (PEG) as a binder and magnesium chloride hexahydrate (MgCl2×6H2O) as an abnormal grain growth inhibitor. The suspensions were homogenized in a planetary ball mill and treated in an ultrasonic bath. Rheological properties (viscosity and shear stress) were determined on a rotational viscometer. It was determined that the suspensions prepared by the partial replacement of the primary Al2O3 powder with the secondary one were stable. The increase in the secondary powder content results in the viscosity increase.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:235:618659
Study programmeTitle: Mechanical Engineering
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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RepositoryRepository of Faculty of Mechanical Engineering and Naval Architecture University of Zagreb
Created on2019-05-24 12:49:41

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