{"id":8337,"date":"2021-04-07T05:34:44","date_gmt":"2021-04-07T05:34:44","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8337"},"modified":"2021-04-07T05:34:44","modified_gmt":"2021-04-07T05:34:44","slug":"aluminum-ceramic-foam-filter","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/aluminum-ceramic-foam-filter\/","title":{"rendered":"Filtro de espuma de alum\u00ednio e cer\u00e2mica"},"content":{"rendered":"<p>Para fabricar produtos de alum\u00ednio com caracter\u00edsticas aceit\u00e1veis, como latas de bebidas e pe\u00e7as da fuselagem de aeronaves, o alum\u00ednio deve estar praticamente livre de inclus\u00f5es e defeitos. Quando o alum\u00ednio derrete no in\u00edcio do processo de fundi\u00e7\u00e3o, ele fica repleto de \u00f3xidos, boretos, sais e outras impurezas, que podem eventualmente aparecer como inclus\u00f5es prejudiciais no produto final. \u00c9 recomend\u00e1vel remover essas inclus\u00f5es antes da solidifica\u00e7\u00e3o do alum\u00ednio. Isso geralmente \u00e9 feito passando o alum\u00ednio fundido por um filtro de espuma cer\u00e2mica.<\/p>\n<p>A t\u00e9cnica comumente utilizada para fabricar filtros de espuma cer\u00e2mica \u00e9 chamada de \u201creplica\u00e7\u00e3o em esponja\u201d. Nesse processo, a espuma de poliuretano \u00e9 revestida com pasta cer\u00e2mica, depois seca para formar um filtro verde e, por fim, submetida \u00e0 queima. Durante o processo de queima, a espuma de poliuretano interna evapora e as liga\u00e7\u00f5es cer\u00e2micas remanescentes formam uma rede cont\u00ednua de pilares cer\u00e2micos, criando assim uma estrutura de espuma semelhante a um exoesqueleto, capaz de replicar ativamente a espuma de poliuretano original.<\/p>\n<p>O <a href=\"http:\/\/www.alalloycasting.com\/pt\/ceramic-foam-material\/\">material de espuma cer\u00e2mica<\/a> possui uma estrutura de c\u00e9lulas abertas com uma distribui\u00e7\u00e3o de vazios interligados, que s\u00e3o cercados por uma rede de material cer\u00e2mico. Essa estrutura \u00e9 comumente utilizada para a filtragem de metal fundido e \u00e9 conhecida na ind\u00fastria como espuma cer\u00e2mica.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-8215\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/03\/Alumina-Ceramic-Foam.jpg\" alt=\"Espuma cer\u00e2mica de alumina\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/03\/Alumina-Ceramic-Foam.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/03\/Alumina-Ceramic-Foam-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>O filtro de espuma cer\u00e2mica \u00e9 capaz de resistir \u00e0 corros\u00e3o qu\u00edmica da liga de alum\u00ednio fundido em condi\u00e7\u00f5es normais de uso.<\/p>\n<p>O filtro de espuma cer\u00e2mica de alum\u00ednio fundido \u00e9 leve e, de prefer\u00eancia, possui uma densidade de cerca de 0,25 a 0,40 g\/cc.<\/p>\n<p>A porosidade principal do filtro \u00e9 determinada pela estrutura macrosc\u00f3pica da espuma, uma vez que o filtro \u00e9 formado como um exoesqueleto do precursor de poliuretano, resultando assim em uma espuma replicada por meio do revestimento com pasta, seguido de secagem e queima. O tamanho prim\u00e1rio dos poros da espuma e do filtro final \u00e9, de prefer\u00eancia, de pelo menos 3 PPI a no m\u00e1ximo 100 PPI, mais preferencialmente de pelo menos 20 PPI a no m\u00e1ximo 70 PPI. Em uma opera\u00e7\u00e3o comercial padr\u00e3o, um filtro medindo 58,4 \u00d7 58,4 \u00d7 5,1 cm (23 \u00d7 23 \u00d7 2 polegadas) deve ser capaz de processar 100 toneladas de metal em uma \u00fanica fundi\u00e7\u00e3o.<\/p>","protected":false},"excerpt":{"rendered":"<p>In order to manufacture aluminum products with acceptable characteristics, such as beverage cans and aircraft fuselage parts, aluminum must be substantially free of inclusions and&hellip;<\/p>","protected":false},"author":1,"featured_media":8338,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-8337","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ceramic-foam-filter"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Aluminum Ceramic Foam Filter 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