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Three-dimensional printing off used silica using femtosecond laser
KTH, School of Electrical Engineering and Computer Science (EECS).
2019 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

High-purity fused silica is a high-performance material, which has outstanding thermal, mechanical, and chemical stability. In addition, the optical and electrical properties of fused silica are suitable for components such as waveguides, lenses, and insulating materials, which are often used in microsystems. However, 3D printing of fused silica is still not freely available in microscale. This thesis proposes a new method for 3D printing of fused silica using femtosecond laser. Smooth printed results with features in microscale have been achieved experimentally. Freeform 3D structures including pillars, walls, arcs, and circles are demonstrated. Moreover, large-volume structures fabricated by placing patterns next to each other are perfectly fused and free from boundaries. Post-baking treatments show the high thermal stability of the printed structures, which did not deform up to 950℃, whereas further surface smoothening happened at 1200℃. The results shown here establish the feasibility of additive manufacturing of high-quality fused silica in microscale using a femtosecond laser. Further research on physical mechanism of the laser-curing processes and the potential applications of this technique in microsystems are needed for developing the proposed method to a reliable and useful platform for 3D printing of fused silica.

Abstract [sv]

Ren kiseldioxidglas är ett material med hög prestanda. Det har enastående värmestabilitet samt mekanisk och kemisk stabilitet. Dessutom har kiseldioxidglas optiska och elektriska egenskaper som passar till komponenter såsom vågledare, linser och isoleringsmaterial, vilka ofta används i mikrosystem. Däremot kan man ännu inte 3D printa kiseldioxidglas i mikroskala. Detta examensarbete presenterar en ny metod för 3D-printning av kiseldioxidglas med hjälp av femtosekundlaser. Genom denna experimentella teknik skapades jämna ytor ned till en mikroskalenivå. Friformsframställning av 3D strukturer inklusive pelare, väggar, bågar och cirklar presenteras. Utöver detta fabricerades storvolymsstrukturer genom att placera mindre strukturer bredvid varandra vilka sammansmältes utan skarvar. Under högtemperatursbehandlingar demonstrerade de printade strukturerna hög värmestabilitet utan att deformeras upp till en temperatur av 950℃, dock uppträdde en utjämning av ytan vid 1200℃. Resultatet påvisade genomförbarheten att friformframställa kiseldioxidglas av hög kvalitet i mikroskalenivå via femtosekundlaser. Vidare forskning för att närmare förstå de fysikaliska mekanismerna och potentiella applikationerna av denna teknik behövs för att vidarutveckla den här metoden till en pålitlig och användbar plattform för 3D-printing av kiseldioxidglas.

Place, publisher, year, edition, pages
2019.
Series
TRITA-EECS-EX ; 2019:163
Keywords [en]
Three-dimensional printing, fused silica, femtosecond laser
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-253017OAI: oai:DiVA.org:kth-253017DiVA, id: diva2:1323008
Educational program
Master of Science - Nanotechnology
Supervisors
Examiners
Available from: 2019-06-11 Created: 2019-06-11 Last updated: 2019-06-11Bibliographically approved

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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More styles
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