{"id":2387,"date":"2026-06-15T07:10:13","date_gmt":"2026-06-15T07:10:13","guid":{"rendered":"https:\/\/www.xkh-ceramics.com\/?p=2387"},"modified":"2026-06-15T07:10:25","modified_gmt":"2026-06-15T07:10:25","slug":"porous-silicon-carbide-sic-ceramic-support","status":"publish","type":"post","link":"https:\/\/www.xkh-ceramics.com\/pt\/porous-silicon-carbide-sic-ceramic-support\/","title":{"rendered":"Suporte cer\u00e2mico de carboneto de sil\u00edcio (SiC) poroso: tecnologia de sinteriza\u00e7\u00e3o a baixa temperatura e estudo de desempenho"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Os suportes cer\u00e2micos porosos de carboneto de sil\u00edcio (SiC) s\u00e3o amplamente utilizados em sistemas avan\u00e7ados de filtra\u00e7\u00e3o por membrana, devido \u00e0 sua excelente estabilidade t\u00e9rmica, elevada resist\u00eancia mec\u00e2nica e resist\u00eancia qu\u00edmica superior.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.xkh-ceramics.com\/pt\/categoria-produto\/silicon-carbide-sic\/\">Materiais cer\u00e2micos \u00e0 base de SiC <\/a>s\u00e3o especialmente adequadas para ambientes adversos, tais como a filtra\u00e7\u00e3o a altas temperaturas, o tratamento de \u00e1guas residuais e o processamento qu\u00edmico. No entanto, as cer\u00e2micas convencionais de SiC requerem temperaturas de sinteriza\u00e7\u00e3o extremamente elevadas (&gt;2000 \u00b0C), o que limita a produ\u00e7\u00e3o industrial em grande escala.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para dar resposta a este desafio, a sinteriza\u00e7\u00e3o em fase l\u00edquida a baixa temperatura com recurso a aditivos de vidro tornou-se uma solu\u00e7\u00e3o eficaz.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/www.xkh-ceramics.com\/wp-content\/uploads\/2026\/06\/Porous-Silicon-Carbide-SiC-Ceramic-Support-Low-Temperature-Sintering-Technology-and-Performance-Study.png\" alt=\"\" class=\"wp-image-2389\" srcset=\"https:\/\/www.xkh-ceramics.com\/wp-content\/uploads\/2026\/06\/Porous-Silicon-Carbide-SiC-Ceramic-Support-Low-Temperature-Sintering-Technology-and-Performance-Study.png 800w, https:\/\/www.xkh-ceramics.com\/wp-content\/uploads\/2026\/06\/Porous-Silicon-Carbide-SiC-Ceramic-Support-Low-Temperature-Sintering-Technology-and-Performance-Study-300x225.png 300w, https:\/\/www.xkh-ceramics.com\/wp-content\/uploads\/2026\/06\/Porous-Silicon-Carbide-SiC-Ceramic-Support-Low-Temperature-Sintering-Technology-and-Performance-Study-768x576.png 768w, https:\/\/www.xkh-ceramics.com\/wp-content\/uploads\/2026\/06\/Porous-Silicon-Carbide-SiC-Ceramic-Support-Low-Temperature-Sintering-Technology-and-Performance-Study-16x12.png 16w, https:\/\/www.xkh-ceramics.com\/wp-content\/uploads\/2026\/06\/Porous-Silicon-Carbide-SiC-Ceramic-Support-Low-Temperature-Sintering-Technology-and-Performance-Study-600x450.png 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Estrat\u00e9gia de sinteriza\u00e7\u00e3o a baixa temperatura para cer\u00e2micas de SiC<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Neste estudo, um <strong>frita de vidro contendo zirc\u00f3nio<\/strong> derivado de xisto de baixo custo foi introduzido como auxiliar de sinteriza\u00e7\u00e3o para promover a liga\u00e7\u00e3o em fase l\u00edquida e reduzir significativamente a temperatura de sinteriza\u00e7\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A frita de vidro \u00e9 preparada atrav\u00e9s da fus\u00e3o de mat\u00e9rias-primas de xisto a 1500 \u00b0C, formando um sistema de vidro multi-\u00f3xido que cont\u00e9m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SiO\u2082, Al\u2082O\u2083, CaO (estrutura em rede)<\/li>\n\n\n\n<li>ZrO\u2082 (melhora a resist\u00eancia \u00e0 corros\u00e3o)<\/li>\n\n\n\n<li>Fe\u2082O\u2083, MgO, Na\u2082O, K\u2082O (aumentam a atividade de sinteriza\u00e7\u00e3o)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Esta abordagem permite que as cer\u00e2micas de SiC sejam densificadas a <strong>1100\u20131250 \u00b0C<\/strong>, reduzindo significativamente o consumo de energia.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Mat\u00e9rias-primas e processo de fabrico<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Sistema de Mat\u00e9rias-Primas<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>P\u00f3 de carboneto de sil\u00edcio (SiC) (pureza de 99,5%, D50 \u2248 15,1 \u03bcm)<\/li>\n\n\n\n<li>Frita de vidro contendo zirc\u00f3nio (aditivo para sinteriza\u00e7\u00e3o a baixa temperatura)<\/li>\n\n\n\n<li>Part\u00edculas de grafite (D50 \u2248 19,4 \u03bcm, agente formador de poros)<\/li>\n\n\n\n<li>Carboximetilcelulose (CMC, aglutinante)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Etapas do processamento<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Mistura de p\u00f3 de SiC, frita de vidro e grafite em propor\u00e7\u00f5es definidas<\/li>\n\n\n\n<li>Moleagem com solu\u00e7\u00e3o de CMC 0,5% (30 minutos)<\/li>\n\n\n\n<li>Secagem e granula\u00e7\u00e3o<\/li>\n\n\n\n<li>Compress\u00e3o uniaxial a 30 MPa<\/li>\n\n\n\n<li>Sinteriza\u00e7\u00e3o a 1100\u20131250 \u00b0C durante 3 horas<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">O produto final \u00e9 um suporte cer\u00e2mico de SiC poroso com uma rede de poros interligados est\u00e1vel.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Caracteriza\u00e7\u00e3o da microestrutura e do desempenho<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. Controlo da porosidade<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A porosidade \u00e9 controlada de forma eficaz atrav\u00e9s do ajuste do teor de frita de vidro e de grafite:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Porosidade: ~30%\u201340%<\/li>\n\n\n\n<li>Estrutura de poros uniforme e interligada<\/li>\n\n\n\n<li>Distribui\u00e7\u00e3o est\u00e1vel do tamanho dos poros<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A grafite queima-se durante a sinteriza\u00e7\u00e3o, formando canais abertos cont\u00ednuos que aumentam a permeabilidade.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Resist\u00eancia mec\u00e2nica<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Em condi\u00e7\u00f5es otimizadas (frita de vidro 20%, grafite 15%, sinterizadas a 1180 \u00b0C):<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Resist\u00eancia \u00e0 flex\u00e3o: <strong>67,1 MPa<\/strong><\/li>\n\n\n\n<li>Rela\u00e7\u00e3o equilibrada entre resist\u00eancia e porosidade<\/li>\n\n\n\n<li>Integridade estrutural est\u00e1vel<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A fase v\u00edtrea melhora a liga\u00e7\u00e3o entre as part\u00edculas e aumenta a estabilidade estrutural.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. An\u00e1lise da composi\u00e7\u00e3o das fases<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Os resultados da difra\u00e7\u00e3o de raios X indicam que:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fase principal: SiC<\/li>\n\n\n\n<li>Presen\u00e7a de uma fase v\u00edtrea menor<\/li>\n\n\n\n<li>N\u00e3o se observaram fases secund\u00e1rias destrutivas<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Isto confirma que a sinteriza\u00e7\u00e3o em fase l\u00edquida \u00e9 o mecanismo predominante na densifica\u00e7\u00e3o.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. Microestrutura (observa\u00e7\u00e3o por SEM)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A an\u00e1lise microestrutural revela:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Distribui\u00e7\u00e3o uniforme das part\u00edculas de SiC<\/li>\n\n\n\n<li>Liga\u00e7\u00e3o na fase v\u00edtrea entre part\u00edculas<\/li>\n\n\n\n<li>Canais porosos interligados e bem desenvolvidos<\/li>\n\n\n\n<li>Tamanho m\u00e9dio dos poros: <strong>1,37 \u03bcm<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Esta estrutura \u00e9 ideal para aplica\u00e7\u00f5es de filtra\u00e7\u00e3o por membrana.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. Permeabilidade e fluxo de \u00e1gua<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">O suporte de SiC poroso otimizado apresenta:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tamanho m\u00e9dio dos poros: 1,37 \u03bcm<\/li>\n\n\n\n<li>Fluxo de \u00e1gua pura: <strong>8075 L\/(m\u00b2\u00b7h\u00b7bar)<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Isto demonstra um excelente desempenho em termos de permeabilidade para sistemas de microfiltra\u00e7\u00e3o.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6. Resist\u00eancia \u00e0 corros\u00e3o por \u00e1cidos e \u00e1lcalis<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A estabilidade qu\u00edmica foi avaliada em condi\u00e7\u00f5es extremas:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ambiente \u00e1cido: pH = 0 (H\u2082SO\u2084, 80 \u00b0C)<\/li>\n\n\n\n<li>Ambiente alcalino: pH = 14 (NaOH, 80 \u00b0C)<\/li>\n\n\n\n<li>Tempo de imers\u00e3o: 24 horas<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Resultados:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reten\u00e7\u00e3o da resist\u00eancia \u00e0 flex\u00e3o ap\u00f3s tratamento com \u00e1cido: <strong>47,4 MPa (perda de 29,41 TP3T)<\/strong><\/li>\n\n\n\n<li>Reten\u00e7\u00e3o da resist\u00eancia \u00e0 flex\u00e3o ap\u00f3s tratamento com \u00e1lcalis: <strong>46,7 MPa (perda de 30,41 TP3T)<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A amostra com frita de vidro 20% apresenta a melhor estabilidade qu\u00edmica global.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Principais vantagens dos suportes cer\u00e2micos porosos de SiC<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u2714 Sinteriza\u00e7\u00e3o a baixa temperatura (1100\u20131250 \u00b0C)<\/li>\n\n\n\n<li>\u2714 Elevada porosidade (~36%)<\/li>\n\n\n\n<li>\u2714 Elevada resist\u00eancia \u00e0 flex\u00e3o (67,1 MPa)<\/li>\n\n\n\n<li>\u2714 Fluxo de \u00e1gua ultra-elevado (8075 L\/m\u00b2\u00b7h\u00b7bar)<\/li>\n\n\n\n<li>\u2714 Excelente resist\u00eancia aos \u00e1cidos e aos \u00e1lcalis<\/li>\n\n\n\n<li>\u2714 Mat\u00e9rias-primas de baixo custo (frita de vidro derivada de xisto)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Aplica\u00e7\u00f5es industriais<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Os suportes cer\u00e2micos porosos de SiC s\u00e3o amplamente utilizados em:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Membranas para o tratamento de \u00e1guas residuais industriais<\/li>\n\n\n\n<li>Sistemas de filtra\u00e7\u00e3o de g\u00e1s a alta temperatura<\/li>\n\n\n\n<li>Unidades de separa\u00e7\u00e3o e purifica\u00e7\u00e3o qu\u00edmica<\/li>\n\n\n\n<li>Estruturas de suporte para catalisadores<\/li>\n\n\n\n<li>Membranas de microfiltra\u00e7\u00e3o de precis\u00e3o<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Conclus\u00e3o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Este estudo apresenta uma abordagem econ\u00f3mica para a prepara\u00e7\u00e3o de suportes cer\u00e2micos porosos de SiC, utilizando uma frita de vidro de zirc\u00f3nio derivada de xisto como auxiliar de sinteriza\u00e7\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Os principais resultados incluem:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Redu\u00e7\u00e3o significativa da temperatura de sinteriza\u00e7\u00e3o<\/li>\n\n\n\n<li>Maior capacidade de controlo da estrutura dos poros<\/li>\n\n\n\n<li>Melhoria do desempenho mec\u00e2nico e da permeabilidade<\/li>\n\n\n\n<li>Forte resist\u00eancia a ambientes \u00e1cidos e alcalinos<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Esta tecnologia constitui uma via promissora para a aplica\u00e7\u00e3o industrial em grande escala de suportes de membrana cer\u00e2micos \u00e0 base de SiC em condi\u00e7\u00f5es de funcionamento adversas.<\/p>","protected":false},"excerpt":{"rendered":"<p>Silicon Carbide (SiC) porous ceramic supports are widely used in advanced membrane filtration systems due to their excellent thermal stability, high mechanical strength, and superior chemical resistance. SiC-based ceramic materials are especially suitable for harsh environments such as high-temperature filtration, wastewater treatment, and chemical processing. However, conventional SiC ceramics require extremely high sintering temperatures (>2000\u00b0C), [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2389,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[4],"tags":[753,749,751,756,748,750,755,752,754],"class_list":["post-2387","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-insights","tag-acid-resistant-ceramic","tag-alkali-resistant-sic","tag-ceramic-filtration-membrane","tag-high-flux-ceramic-membrane","tag-low-temperature-sintering-sic","tag-porous-ceramic-materials","tag-porous-silicon-carbide-ceramic","tag-sic-ceramic-support","tag-silicon-carbide-membrane-support"],"_links":{"self":[{"href":"https:\/\/www.xkh-ceramics.com\/pt\/wp-json\/wp\/v2\/posts\/2387","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xkh-ceramics.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xkh-ceramics.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xkh-ceramics.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xkh-ceramics.com\/pt\/wp-json\/wp\/v2\/comments?post=2387"}],"version-history":[{"count":1,"href":"https:\/\/www.xkh-ceramics.com\/pt\/wp-json\/wp\/v2\/posts\/2387\/revisions"}],"predecessor-version":[{"id":2390,"href":"https:\/\/www.xkh-ceramics.com\/pt\/wp-json\/wp\/v2\/posts\/2387\/revisions\/2390"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.xkh-ceramics.com\/pt\/wp-json\/wp\/v2\/media\/2389"}],"wp:attachment":[{"href":"https:\/\/www.xkh-ceramics.com\/pt\/wp-json\/wp\/v2\/media?parent=2387"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xkh-ceramics.com\/pt\/wp-json\/wp\/v2\/categories?post=2387"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xkh-ceramics.com\/pt\/wp-json\/wp\/v2\/tags?post=2387"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}