{"id":4890,"date":"2020-09-18T06:33:07","date_gmt":"2020-09-18T06:33:07","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=4890"},"modified":"2020-09-18T06:33:07","modified_gmt":"2020-09-18T06:33:07","slug":"foam-ceramic","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/foam-ceramic\/","title":{"rendered":"Cer\u00e1mica de espuma"},"content":{"rendered":"

La espuma cer\u00e1mica de al\u00famina es una cer\u00e1mica espumosa de baja temperatura que se utiliza principalmente para filtrar metales no ferrosos fundidos, como el aluminio y las aleaciones de aluminio. Es el tipo de cer\u00e1mica espumosa m\u00e1s producido en China. Al mismo tiempo, dado que la fundici\u00f3n de aluminio l\u00edquido se realiza principalmente mediante un proceso de fundici\u00f3n en barra, el tama\u00f1o de la filtro de espuma cer\u00e1mica de al\u00famina<\/a>\u00a0es mayor que la de la circonia y el carburo de silicio.<\/p>\n

Dado que el aluminio l\u00edquido filtrado tiene una densidad menor, sus requisitos de rendimiento, como la resistencia de la filtro de espuma cer\u00e1mica \u2013 PAl<\/a> son relativamente bajos. La investigaci\u00f3n nacional sobre cer\u00e1mica de espuma de al\u00famina se inici\u00f3 hace tiempo, el proceso de producci\u00f3n est\u00e1 consolidado y los requisitos t\u00e9cnicos no son muy exigentes, por lo que la calidad de los productos fabricados por los fabricantes nacionales es relativamente estable.<\/p>\n

Las principales materias primas de la cer\u00e1mica de espuma de al\u00famina son la al\u00famina \u03b1, el caol\u00edn, el polvo de s\u00edlice, el feldespato y el dihidrogenofosfato de aluminio. El componente de al\u00famina \u03b1 representa m\u00e1s del 80%, y la densidad de la pasta es de 2,3 a 2,6 g\/cm\u00b3. Es m\u00e1s ligera y presenta menores requisitos en cuanto a la elasticidad y la resistencia de la espuma de poliuretano.<\/p>\n

\"Cer\u00e1mica<\/p>\n

Al tratarse de una cer\u00e1mica celular resistente a altas temperaturas, la cer\u00e1mica celular de circonio se utiliza principalmente en la filtraci\u00f3n de metales fundidos a alta temperatura, como el acero de fundici\u00f3n y las aleaciones de alta temperatura. El consumo total no es elevado y hay pocos fabricantes nacionales de este tipo de cer\u00e1mica celular, como AdTech. Filtro de espuma cer\u00e1mica - PZr<\/a>. Las dificultades t\u00e9cnicas en la producci\u00f3n de cer\u00e1micas de espuma de circonio se centran principalmente en la calidad del soporte de espuma de poliuretano, el control de la temperatura de sinterizaci\u00f3n del circonio y la expansi\u00f3n volum\u00e9trica provocada por la transformaci\u00f3n de fase cristalina del circonio. Entre ellas, la temperatura de sinterizaci\u00f3n de la circonia y la transici\u00f3n de fase cristalina de la circonia son problemas t\u00e9cnicos, mientras que la elecci\u00f3n del soporte de espuma de poliuretano es un problema relacionado con la calidad de la materia prima.<\/p>\n

La densidad real del polvo de circonio es de 5,7 g\/cm\u00b3 y su gravedad espec\u00edfica es relativamente elevada. La suspensi\u00f3n cer\u00e1mica, compuesta por polvo de circonio parcialmente estabilizado y aditivos, presenta una alta gravedad espec\u00edfica y buena fluidez. En el proceso de encolado de la cer\u00e1mica celular, el soporte de espuma de poliuretano debe tener una buena capacidad de adsorci\u00f3n de la suspensi\u00f3n, una buena tasa de perforaci\u00f3n, una malla de espuma tupida y elasticidad. Buena y elevada resistencia a la tracci\u00f3n. La densidad de la esponja de poliuretano de c\u00e9lula abierta es de tan solo 0,03 ~ 0,05 g\/cm\u00b3, y la esponja en s\u00ed no es muy el\u00e1stica, por lo que su resistencia no suele cumplir los requisitos del proceso de producci\u00f3n de la cer\u00e1mica de espuma de circonio.<\/p>","protected":false},"excerpt":{"rendered":"

Alumina ceramic foam is a low-temperature foam ceramic, which is mainly used for filtering non-ferrous metal melts such as aluminum and aluminum alloy. It is…<\/p>","protected":false},"author":1,"featured_media":4891,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[242],"class_list":["post-4890","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-foam-ceramic"],"yoast_head":"\nFoam Ceramic Filter for Casting of Aluminium Alloys<\/title>\n<meta name=\"description\" content=\"Alumina ceramic foam is a low-temperature foam ceramic, which is mainly used for filtering non-ferrous metal melts such as aluminum.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alalloycasting.com\/es\/foam-ceramic\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Foam Ceramic Filter for Casting 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