{"id":22887,"date":"2025-10-24T12:09:47","date_gmt":"2025-10-24T12:09:47","guid":{"rendered":"https:\/\/aerospacerepository.org\/?p=22887"},"modified":"2025-10-24T12:09:48","modified_gmt":"2025-10-24T12:09:48","slug":"investigating-the-effects-of-porosity-on-the-dielectric-and-mechanical-properties-of-additively-manufactured-ceramics","status":"publish","type":"post","link":"https:\/\/aerospacerepository.org\/index.php\/2025\/10\/24\/investigating-the-effects-of-porosity-on-the-dielectric-and-mechanical-properties-of-additively-manufactured-ceramics\/","title":{"rendered":"Investigating the Effects of Porosity on the Dielectric and Mechanical Properties of Additively Manufactured Ceramics"},"content":{"rendered":"\n<p><strong>Louise S\u00c9VIN, Wael IDRISSI, C\u00e9line LE SINQ, Johan PETIT<\/strong><\/p>\n\n\n\n<p><strong>DOI Number: N\/A<\/strong><\/p>\n\n\n\n<p><strong>Conference number: HiSST-2025-146<\/strong><\/p>\n\n\n\n<p>This study focuses on the electromagnetic properties of ceramics for ultra-high temperature radiofrequency (RF) windows. Although silica shows promising transparency properties due to its low dielectric constant (\u03b5), its temperature limit (below 1373K) restricts its application. To overcome this limitation, we aim at reducing the dielectric constant of alternative ceramics while maintaining sufficient thermomechanical resistance. We investigated samples with various porosity levels (5-40%) and designs (gyroids, honeycombs, triangles, stars, and random porous structures) using Fused Deposition Modelling and conventional methods. Notably, our results align with established analytical models,<br>yielding dielectric constants below 5 for porosities above 35%. Interestingly, the size of the interstices and walls (1500-5000 \u00b5m) did not significantly affect the dielectric constant. Moreover, our findings highlight the importance of optimizing structured porosity to balance high flexural strength with reduced dielectric constant.<\/p>\n\n\n\n<p><a href=\"https:\/\/aerospacerepository.org\/wp-content\/uploads\/2025\/10\/HISST2025_146_paper.pdf\">Read the full paper here<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Louise S\u00c9VIN, Wael IDRISSI, C\u00e9line LE SINQ, Johan PETIT<\/b><\/p>\n<p>DOI Number: N\/A<\/p>\n<p>Conference number: HiSST-2025-146<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[993,3361,3366],"tags":[3625,3626,3627,3628],"class_list":["post-22887","post","type-post","status-publish","format-standard","hentry","category-events","category-1-hisst-2025","category-materials-and-structures-for-vehicle-and-all-subsystems","tag-al2o3","tag-electromagnetics-properties","tag-fused-deposition-modeling","tag-rf-transparency","category-993","category-3361","category-3366","description-off"],"_links":{"self":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/22887","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/comments?post=22887"}],"version-history":[{"count":1,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/22887\/revisions"}],"predecessor-version":[{"id":22889,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/posts\/22887\/revisions\/22889"}],"wp:attachment":[{"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/media?parent=22887"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/categories?post=22887"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aerospacerepository.org\/index.php\/wp-json\/wp\/v2\/tags?post=22887"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}