It looks like a tennis ball on a clay court, but it is actually a microstructure that can be used as a basis for producing refractory ceramics. When viewed under an electron microscope, what appears to be a sphere is actually a cavity. The matrix of the material is composed of magnesium oxide, with the precipitation of the mineral spinel. The image, obtained during a study aimed at producing sustainable alternatives to aggregates containing chromium\u2014which is toxic to humans and the environment in soluble form\u2014won an award at the international conference of the American Ceramic Society in October.<\/p>\n
Image submitted by materials engineer Ot\u00e1vio Henrique Borges, a doctoral student at the Federal University of S\u00e3o Carlos (UFSCar), obtained in partnership with his advisor, Victor Carlos Pandolfelli<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"It looks like a tennis ball, but it is actually a microstructure that could be used to produce refractory ceramics","protected":false},"author":475,"featured_media":575378,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[164],"tags":[259,228],"coauthors":[785],"class_list":["post-575369","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-photolab","tag-chemistry","tag-engineering"],"acf":[],"_links":{"self":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/575369","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/users\/475"}],"replies":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/comments?post=575369"}],"version-history":[{"count":1,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/575369\/revisions"}],"predecessor-version":[{"id":575382,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/575369\/revisions\/575382"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/media\/575378"}],"wp:attachment":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/media?parent=575369"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/categories?post=575369"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/tags?post=575369"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/coauthors?post=575369"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}