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master's thesis
Kristali koji pružaju mehanički odziv na toplinsku pobudu
Zagreb: University of Zagreb, Faculty of Science, 2019. urn:nbn:hr:217:108893
Jaklin, Marko
University of Zagreb
Faculty of Science
Department of Physics

Institutional repository: Repository of the Faculty of Science

Cite this document

Jaklin, M. (2019). Kristali koji pružaju mehanički odziv na toplinsku pobudu (Master's thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:108893

Jaklin, Marko. "Kristali koji pružaju mehanički odziv na toplinsku pobudu." Master's thesis, University of Zagreb, Faculty of Science, 2019. https://urn.nsk.hr/urn:nbn:hr:217:108893

Jaklin, Marko. "Kristali koji pružaju mehanički odziv na toplinsku pobudu." Master's thesis, University of Zagreb, Faculty of Science, 2019. https://urn.nsk.hr/urn:nbn:hr:217:108893

Jaklin, M. (2019). 'Kristali koji pružaju mehanički odziv na toplinsku pobudu', Master's thesis, University of Zagreb, Faculty of Science, accessed 22 November 2024, https://urn.nsk.hr/urn:nbn:hr:217:108893

Jaklin M. Kristali koji pružaju mehanički odziv na toplinsku pobudu [Master's thesis]. Zagreb: University of Zagreb, Faculty of Science; 2019 [cited 2024 November 22] Available at: https://urn.nsk.hr/urn:nbn:hr:217:108893

M. Jaklin, "Kristali koji pružaju mehanički odziv na toplinsku pobudu", Master's thesis, University of Zagreb, Faculty of Science, Zagreb, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:217:108893

Metadata
TitleKristali koji pružaju mehanički odziv na toplinsku pobudu
Title (english)Thermaly excited crystals with mechanical response
AuthorMarko Jaklin
MentorŽeljko Skoko (mentor)
Committee memberŽeljko Skoko (predsjednik povjerenstva)
Committee memberDalibor Paar (član povjerenstva)
Committee memberIvica Smolić (član povjerenstva)
Committee memberDamir Pajić (član povjerenstva)
Committee memberMario Basletić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Physics)
Zagreb
Defense date and country2019-05-08, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Abstract
Materijali koji pružaju mehanički odziv (kao što su promjena oblika ili skakanje) na vanjsku pobudu (svjetlost, toplina, elektromagnetsko polje) su efektivna sredstva za transformaciju energije u mehanički rad. Takvi materijali su potencijalni kandidati za primjenu u aktuatorima, umjetnim mišićima i biomimetičkim materijalima. Prilikom grijanja određenih kristala primijećeno je da skaču. Takvi materijali su nazvani termoodskočni materijali (eng. thermosalient). Skakanje je uobičajeno popraćeno brzim faznim prijelazima. Fazama koje sudjeluju u faznom prijelazu je sačuvana prostorna grupa i simetrija ali se razlikuju u parametrima ćelije. Termoodskočni materijal koji proučavamo u ovom radu je ((E)-4-((3,5-dichloro-2-hydro -xybenzylidene) amino)benzamide). Opažene su četiri faze ovog materijala koje sudjeluju u faznim prijelazima kod kojih se javlja termoodskočni efekt. Prilikom grijanja faze I, II, III prijelaze u fazu IV prilikom čega kristali skaču ili eksplodiraju. Koristeći kombinaciju strukturnih (rendgenska dofrakcija u polikristalu), termičkih (DTA - diferencijalna termička analiza) i mikroskopskih (mikroskop s pločom za zagrijavanje) metoda u ovom radu istražujemo faze koje sudjeluju u termoodskočnom efektu.
Abstract (english)
Materials which offer mechanical response (like shape change or jumping) on external stimulus (like light, heat, electromagnetic field) are effective media for transformation of energy in mechanical work. These materials are potential candidates for application in actuators, artificial muscles, biomimetic materials, etc. Tt was observed that some materials jump during heating. These materials are called thermosalient materials. Jumping is usually accompanied by sharp phase transitions. Space group and symmetry of phases which participate in phase transition is conserved but they differ in cell parameters. Thermosalient material which is analysed in this work is ((E)-4-((3,5-dichloro-2-hydro -xybenzylidene) amino) benzamide). Four polymorphic forms of these material are reported to participate in phase transitions that show thermosalient effect. While heating forms I, II and III transform into phase IV during which crystals jump or explode. During cooling phase transition IV→III occurs. By using powder X-ray diffraction, thermal differential analysis and hot stage microscopy we study the phases which participate in thermosalient effect.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:108893
Study programmeTitle: Physics; specializations in: Education
Course: Education
Study programme type: university
Study level: integrated undergraduate and graduate
Academic / professional title: magistar/magistra edukacije fizike (magistar/magistra edukacije fizike)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2019-09-04 12:40:58