{"id":4747,"date":"2018-01-01T00:00:00","date_gmt":"2018-01-01T08:00:00","guid":{"rendered":"https:\/\/wpdev.hmc.edu\/physics\/2018\/01\/01\/4747\/"},"modified":"2025-12-19T09:02:20","modified_gmt":"2025-12-19T17:02:20","slug":"4747","status":"publish","type":"physics_publications","link":"https:\/\/www.hmc.edu\/physics\/research\/publications\/4747\/","title":{"rendered":"Permittivity effects of particle agglomeration in ferroelectric ceramic-epoxy composites using finite element modeling"},"content":{"rendered":"\n<p id=\"authors\"><span class=\"studauthor\">Jonas Leif Kaufman<\/span>, <span class=\"studauthor\">Scott H. Tan<\/span>, <span class=\"studauthor\">Kirklann Lau<\/span>, <span class=\"studauthor\">Ashka Shailesh Shah<\/span>, <span class=\"studauthor\">Robert G. Gambee<\/span>, <span class=\"studauthor\">Christopher P. Gage<\/span>, <span class=\"studauthor\">Lupe Maria MacIntosh<\/span>, <span class=\"facauthor\">Albert Dato<\/span>*, <span class=\"facauthor\">Peter N. Saeta<\/span>*, <span class=\"facauthor\">Richard Campbell Haskell<\/span>*, and Todd C. Monson<\/p>\n\n\n\n<p><a href=\"https:\/\/www.hmc.edu\/physics\/wp-content\/uploads\/sites\/22\/2023\/02\/pub-136.pdf\">Permittivity effects of particle agglomeration in ferroelectric ceramic-epoxy composites using finite element modeling (PDF)<\/a><\/p>\n\n\n\n<p id=\"journal\"><span class=\"journal-title\">AIP Advances<\/span> <strong data-vol=\"8\">8<\/strong> <span id=\"journal-year\">(2018)<\/span> <span id=\"journal-pages\" data-pages=\"125020\">125020<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Abstract<\/h2>\n\n\n\n<p>The size dependence of the dielectric constants of barium titanate or other ferroelectric particles can be explored by embedding particles into an epoxy matrix whose dielectric constant can be measured directly. However, to extract the particle dielectric constant requires a model of the composite medium. We compare a finite-element model for various volume fractions and particle arrangements to several effective-medium approximations, which do not consider particle arrangement explicitly. For a fixed number of particles, the composite dielectric constant increases with the degree of agglomeration, and we relate this increase to the number of regions of enhanced electric field along the applied field between particles in an agglomerate. Additionally, even for dispersed particles, we find that the composite method of assessing the particle dielectric constant may not be effective if the particle dielectric constant is too high compared to the background medium dielectric constant.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Jonas Leif Kaufman, Scott H. Tan, Kirklann Lau, Ashka Shailesh Shah, Robert G. Gambee, Christopher P. Gage, Lupe Maria MacIntosh, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"template":"","publication_author":[18,21],"class_list":["post-4747","physics_publications","type-physics_publications","status-publish","hentry","publication_author-haskell","publication_author-saeta"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/physics_publications\/4747","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/physics_publications"}],"about":[{"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/types\/physics_publications"}],"author":[{"embeddable":true,"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/users\/1"}],"wp:attachment":[{"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/media?parent=4747"}],"wp:term":[{"taxonomy":"publication_author","embeddable":true,"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/publication_author?post=4747"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}