Analysis of slurry composition for the direct ink writing of mayenite electride for use in thermionic cathodes
Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, May, 2019
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2020
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| Online Access: | https://hdl.handle.net/1721.1/128417 |
| _version_ | 1826201316492312576 |
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| author | Han, Gina(Researcher in mechanical engineering)Massachusetts Institute of Technology. |
| author2 | A. John Hart. |
| author_facet | A. John Hart. Han, Gina(Researcher in mechanical engineering)Massachusetts Institute of Technology. |
| author_sort | Han, Gina(Researcher in mechanical engineering)Massachusetts Institute of Technology. |
| collection | MIT |
| description | Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, May, 2019 |
| first_indexed | 2024-09-23T11:50:00Z |
| format | Thesis |
| id | mit-1721.1/128417 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T11:50:00Z |
| publishDate | 2020 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/1284172022-11-21T12:11:22Z Analysis of slurry composition for the direct ink writing of mayenite electride for use in thermionic cathodes Han, Gina(Researcher in mechanical engineering)Massachusetts Institute of Technology. A. John Hart. Massachusetts Institute of Technology. Department of Mechanical Engineering. Massachusetts Institute of Technology. Department of Mechanical Engineering Mechanical Engineering. Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, May, 2019 Cataloged from PDF of thesis. "The Table of Contents does not accurately represent the page numbering"--Disclaimer page. Includes bibliographical references (page 25). Thermionic cathodes, for use in electric propulsion thrusters, often utilize materials of low work function to decrease operating temperature and thus decrease power consumption. The ability to form these materials into complicated geometries allows for design of more efficient thermionic cathodes, such as multi-channel hollow cathodes. Mayenite electride, a calcium aluminate ceramic with a cage-like lattice structure that traps in electrons, has been identified as a low-work function ceramic that could be used for these thermionic cathodes. This thesis explores an additive manufacturing (AM) process for mayenite electride components, including the synthesis process for insulating mayenite and the development of an acetone-based slurry composition for direct ink writing (DIW). As the ink composition is critical to the success of any direct ink writing process, an in depth analysis was performed on mayenite slurries, which focused on different solvents, binders, and the dispersion of the ceramic particles. Water and acetone-based slurries were developed with mayenite, and printing tests showed that the printing mayenite with acetone as the solvent is viable, but greater dispersion of the mayenite powder within the slurry is necessary. In order to make quality components, the mayenite powder needs to be ground to a finer powder, the slurry needs to be mixed more thoroughly, or a dispersant must be added. by Gina Han. S.B. S.B. Massachusetts Institute of Technology, Department of Mechanical Engineering 2020-11-06T21:08:57Z 2020-11-06T21:08:57Z 2019 2019 Thesis https://hdl.handle.net/1721.1/128417 1203144534 eng MIT theses may be protected by copyright. Please reuse MIT thesis content according to the MIT Libraries Permissions Policy, which is available through the URL provided. http://dspace.mit.edu/handle/1721.1/7582 25 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Mechanical Engineering. Han, Gina(Researcher in mechanical engineering)Massachusetts Institute of Technology. Analysis of slurry composition for the direct ink writing of mayenite electride for use in thermionic cathodes |
| title | Analysis of slurry composition for the direct ink writing of mayenite electride for use in thermionic cathodes |
| title_full | Analysis of slurry composition for the direct ink writing of mayenite electride for use in thermionic cathodes |
| title_fullStr | Analysis of slurry composition for the direct ink writing of mayenite electride for use in thermionic cathodes |
| title_full_unstemmed | Analysis of slurry composition for the direct ink writing of mayenite electride for use in thermionic cathodes |
| title_short | Analysis of slurry composition for the direct ink writing of mayenite electride for use in thermionic cathodes |
| title_sort | analysis of slurry composition for the direct ink writing of mayenite electride for use in thermionic cathodes |
| topic | Mechanical Engineering. |
| url | https://hdl.handle.net/1721.1/128417 |
| work_keys_str_mv | AT hanginaresearcherinmechanicalengineeringmassachusettsinstituteoftechnology analysisofslurrycompositionforthedirectinkwritingofmayeniteelectrideforuseinthermioniccathodes |