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dc.contributor.author
KOLTSAKIDIS, SAVVAS
en
dc.date.accessioned
2021-08-11T11:48:50Z
dc.date.available
2021-08-11T11:48:50Z
dc.date.issued
2021-08-11
dc.identifier.uri
https://repository.ihu.edu.gr//xmlui/handle/11544/29733
dc.rights
Default License
dc.subject
3d printing
en
dc.subject
advanced ceramics
en
dc.subject
indirect template
en
dc.subject
CFD
en
dc.subject
monolith
en
dc.subject
catalyst
en
dc.subject
zeolite
en
dc.subject
mechanical properties
en
dc.title
Design, analysis, fabrication, and mechanical properties investigation of indirect 3d printed zeolite monoliths.
en
heal.type
masterThesis
en_US
heal.dateAvailable
2021-05-12
heal.language
en
en_US
heal.access
free
en_US
heal.license
http://creativecommons.org/licenses/by-nc/4.0
en_US
heal.recordProvider
School of Science and Technology, MSc in Strategic Product Design
en_US
heal.publicationDate
2021-05-12
heal.abstract
This thesis goal was to demonstrate that indirect 3d printing of zeolite monoliths provides higher flexibility and freedom as a fabrication method, compared to conventional extrusion procedures. After considering application constrains and needs, sacrificial templates were designed through a Computer Aided Design (CAD) software enabling the precise control of channel’s shape and size. The monoliths, that are the exact negative replicas of the templates, are then evaluated in terms of hydraulic behavior and generated pressure drop through a Computational Fluid Dynamic (CFD) study. After selection of the most efficient design, polymer molds were fabricated by a Digital Light Processing (DLP) printer and were filled with a paste consisting of ZSM 5 zeolite powder and sodium silicate that acts as a binder. A multistep drying process followed by sintering was carried out to burn out the polymer templates and remove the binder. The dimensional accuracy of the final parts was examined using a DinoLite digital optical microscope. Finally the mechanical properties of the produced material were investigated by preparing specimens and performing 3-point bending and microhardness test. The results indicate a potential usage of indirect 3d printing for catalysis procedures.
en
heal.tableOfContents
Introduction..................................................................................................................................... 1 1 Advanced ceramics mechanical properties.................................................................................. 4 1.1 Brittle behavior of ceramics.................................................................................................. 4 1.2 Flexural Strength of ceramics............................................................................................... 5 1.3 Hardness of ceramics............................................................................................................ 7 2 Advanced Ceramics Additive Manufacturing ............................................................................. 9 2.1 Direct Additive Manufacturing for ceramics........................................................................ 9 2.1.1 Stereolithography......................................................................................................... 10 2.1.2 Direct Ink Writing........................................................................................................ 11 2.1.3 Selective Laser Sintering ............................................................................................. 12 2.2 Direct Additive Manufacturing for catalysts ...................................................................... 13 2.3 Indirect Additive Manufacturing for ceramics ................................................................... 14 2.4 Indirect Additive Manufacturing for catalysts.................................................................... 15 3 Tools & Methods....................................................................................................................... 18 3.1 Application requirements.................................................................................................... 18 3.2 Computer Aided Design ..................................................................................................... 19 3.3 Paste composition ............................................................................................................... 23 3.4 Slicing method .................................................................................................................... 25 3.5 Template printing procedure............................................................................................... 28 3.6 Drying & Sintering procedures........................................................................................... 32 3.7 Mechanical properties setup ............................................................................................... 34 4 Results........................................................................................................................................ 40 4.1 CFD simulation................................................................................................................... 40 4.2 Dimensional accuracy......................................................................................................... 46 vi 4.3 Bending results.................................................................................................................... 48 4.4 Hardness results.................................................................................................................. 50 5 Conclusions................................................................................................................................ 52 Table of Figures............................................................................................................................ 54 Table of Tables ............................................................................................................................. 56 Bibliography ................................................................................................................................. 57
en
heal.advisorName
TZETZIS, DIMITRIOS
en
heal.committeeMemberName
KARALEKAS, DIMITRIOS
en
heal.committeeMemberName
GOGOUSSIS, ARISTIDES
en
heal.academicPublisher
SCHOOL OF SCIENCE AND TECHNOLOGY.DIGITAL MANUFACTURING AND MATERIALS CHARACTERIZATION
en
heal.academicPublisherID
ihu
en_US
heal.numberOfPages
57
en_US

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