{"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\/fi\/porous-silicon-carbide-sic-ceramic-support\/","title":{"rendered":"Huokoinen piikarbidista (SiC) valmistettu keraaminen tuki: matalal\u00e4mp\u00f6tilainen sintraustekniikka ja suorituskykytutkimus"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Piikarbidista (SiC) valmistettuja huokoisia keraamisia tukimateriaaleja k\u00e4ytet\u00e4\u00e4n laajalti edistyneiss\u00e4 kalvosuodatusj\u00e4rjestelmiss\u00e4 niiden erinomaisen l\u00e4mp\u00f6stabiilisuuden, suuren mekaanisen lujuuden ja erinomaisen kemiallisen kest\u00e4vyyden ansiosta.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.xkh-ceramics.com\/fi\/tuote-osasto\/silicon-carbide-sic\/\">SiC-pohjaiset keraamiset materiaalit <\/a>sopivat erityisen hyvin vaativiin olosuhteisiin, kuten korkean l\u00e4mp\u00f6tilan suodatukseen, j\u00e4teveden k\u00e4sittelyyn ja kemialliseen prosessointiin. Perinteiset SiC-keraamit vaativat kuitenkin eritt\u00e4in korkeita sintrausl\u00e4mp\u00f6tiloja (&gt;2000 \u00b0C), mik\u00e4 rajoittaa niiden laajamittaista teollista tuotantoa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e4m\u00e4n haasteen ratkaisemiseksi lasilis\u00e4aineita hy\u00f6dynt\u00e4v\u00e4 matalal\u00e4mp\u00f6tilainen nestevaiheen sintraus on osoittautunut tehokkaaksi ratkaisuksi.<\/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\">SiC-keraamien matalal\u00e4mp\u00f6tilainen sintrausmenetelm\u00e4<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e4ss\u00e4 tutkimuksessa <strong>zirkoniumia sis\u00e4lt\u00e4v\u00e4 lasifriitti<\/strong> halvasta liuskeesta johdettu aine otettiin k\u00e4ytt\u00f6\u00f6n sintrausapuna edist\u00e4m\u00e4\u00e4n nestevaiheen sitoutumista ja alentamaan sintrausl\u00e4mp\u00f6tilaa merkitt\u00e4v\u00e4sti.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Lasifritti valmistetaan sulattamalla liuske-raaka-aineita 1500 \u00b0C:n l\u00e4mp\u00f6tilassa, jolloin muodostuu monioksidinen lasij\u00e4rjestelm\u00e4, joka sis\u00e4lt\u00e4\u00e4:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SiO\u2082, Al\u2082O\u2083, CaO (verkkomainen rakenne)<\/li>\n\n\n\n<li>ZrO\u2082 (parantaa korroosionkest\u00e4vyytt\u00e4)<\/li>\n\n\n\n<li>Fe\u2082O\u2083, MgO, Na\u2082O, K\u2082O (tehostavat sintrausprosessia)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e4m\u00e4n menetelm\u00e4n avulla SiC-keraamit voidaan tiivist\u00e4\u00e4 <strong>1100\u20131250 \u00b0C<\/strong>, mik\u00e4 v\u00e4hent\u00e4\u00e4 energiankulutusta huomattavasti.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Raaka-aineet ja valmistusprosessi<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Raaka-ainej\u00e4rjestelm\u00e4<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Piikarbidijauhe (SiC) (puhtaus 99,5%, D50 \u2248 15,1 \u03bcm)<\/li>\n\n\n\n<li>Zirkoniumia sis\u00e4lt\u00e4v\u00e4 lasifriitti (matalal\u00e4mp\u00f6tilainen sintrauslis\u00e4aine)<\/li>\n\n\n\n<li>Grafiittihiukkaset (D50 \u2248 19,4 \u03bcm, huokosia muodostava aine)<\/li>\n\n\n\n<li>Karboksimetyyliselluloosa (CMC, sideaine)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">K\u00e4sittelyvaiheet<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>SiC-jauheen, lasifritin ja grafiitin sekoittaminen ennalta m\u00e4\u00e4ritellyiss\u00e4 suhteissa<\/li>\n\n\n\n<li>Pallomyllyjauhaminen 0,5% CMC-liuoksella (30 minuuttia)<\/li>\n\n\n\n<li>Kuivaus ja rakeistus<\/li>\n\n\n\n<li>Yksiaksiaalinen puristus 30 MPa:n paineella<\/li>\n\n\n\n<li>Sintraus 1100\u20131250 \u00b0C:ssa 3 tuntia<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Lopputuote on huokoinen SiC-keraaminen tukimateriaali, jossa on vakaa, toisiinsa kytkeytynyt huokosverkosto.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Mikrorakenteen ja suorituskyvyn karakterisointi<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. Huokoisuuden hallinta<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Huokoisuutta voidaan tehokkaasti s\u00e4\u00e4t\u00e4\u00e4 muuttamalla lasifritin ja grafiitin pitoisuutta:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Huokoisuus: ~30%\u201340%<\/li>\n\n\n\n<li>Yhten\u00e4inen ja toisiinsa kytkeytyv\u00e4 huokosrakenne<\/li>\n\n\n\n<li>Vakaa huokoskokojakauma<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Grafiitti palaa pois sintrauksen aikana ja muodostaa yhten\u00e4isi\u00e4 avoimia kanavia, jotka parantavat l\u00e4p\u00e4isevyytt\u00e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Mekaaninen lujuus<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Optimoiduissa olosuhteissa (20%-lasifritti, 15%-grafiitti, sintrattu 1180 \u00b0C:ssa):<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Taivutuslujuus: <strong>67,1 MPa<\/strong><\/li>\n\n\n\n<li>Tasapainoinen suhde lujuuden ja huokoisuuden v\u00e4lill\u00e4<\/li>\n\n\n\n<li>Vakaa rakenteellinen eheys<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Lasivaihe parantaa hiukkasten v\u00e4list\u00e4 sitoutumista ja lis\u00e4\u00e4 rakenteellista vakautta.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Faasikoostumuksen analyysi<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">R\u00f6ntgendiffraktiotulokset osoittavat seuraavaa:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>P\u00e4\u00e4vaihe: SiC<\/li>\n\n\n\n<li>Pieni\u00e4 lasimaisia faaseja havaittavissa<\/li>\n\n\n\n<li>Tuhoavia toissijaisia vaiheita ei havaittu<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e4m\u00e4 vahvistaa sen, ett\u00e4 tiivistymismekanismissa vallitsevana tekij\u00e4n\u00e4 on nestevaiheen sintraus.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. Mikrorakenne (SEM-havainnointi)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Mikrorakenteellinen analyysi paljastaa:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SiC-hiukkasten tasainen jakautuminen<\/li>\n\n\n\n<li>Hiukkasten v\u00e4linen lasivaiheen sidos<\/li>\n\n\n\n<li>Hyvin kehittyneet, toisiinsa yhteydess\u00e4 olevat huokoskanavat<\/li>\n\n\n\n<li>Keskim\u00e4\u00e4r\u00e4inen huokoskoko: <strong>1,37 \u03bcm<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e4m\u00e4 rakenne sopii erinomaisesti kalvosuodatussovelluksiin.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. L\u00e4p\u00e4isevyys ja vesivirta<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Optimoidulla huokoisella SiC-tukimateriaalilla on seuraavat ominaisuudet:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Keskim\u00e4\u00e4r\u00e4inen huokoskoko: 1,37 \u03bcm<\/li>\n\n\n\n<li>Puhtaan veden virtaus: <strong>8075 l\/(m\u00b2\u00b7h\u00b7bar)<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e4m\u00e4 osoittaa erinomaisen l\u00e4p\u00e4isevyyden mikrosuodatusj\u00e4rjestelmiss\u00e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6. Happo- ja em\u00e4skorroosionkest\u00e4vyys<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Kemiallista stabiilisuutta arvioitiin \u00e4\u00e4riolosuhteissa:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hapan ymp\u00e4rist\u00f6: pH = 0 (H\u2082SO\u2084, 80 \u00b0C)<\/li>\n\n\n\n<li>Em\u00e4ksinen ymp\u00e4rist\u00f6: pH = 14 (NaOH, 80 \u00b0C)<\/li>\n\n\n\n<li>Liotusaika: 24 tuntia<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tulokset:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hapolla k\u00e4sitellyn taivutuslujuuden s\u00e4ilyminen: <strong>47,4 MPa (29,41 TP3T:n menetys)<\/strong><\/li>\n\n\n\n<li>Alkalik\u00e4sittelyn vaikutus taivutuslujuuden s\u00e4ilymiseen: <strong>46,7 MPa (30,41 TP3T:n menetys)<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">20%-lasifritti\u00e4 sis\u00e4lt\u00e4v\u00e4 n\u00e4yte osoittaa parasta yleist\u00e4 kemiallista stabiilisuutta.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Huokoisten SiC-keraamisten tukien t\u00e4rkeimm\u00e4t edut<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u2714 Matalal\u00e4mp\u00f6tilainen sintraus (1100\u20131250 \u00b0C)<\/li>\n\n\n\n<li>\u2714 Suuri huokoisuus (~36%)<\/li>\n\n\n\n<li>\u2714 Suuri taivutuslujuus (67,1 MPa)<\/li>\n\n\n\n<li>\u2714 Eritt\u00e4in suuri vesivuon tiheys (8075 L\/m\u00b2\u00b7h\u00b7bar)<\/li>\n\n\n\n<li>\u2714 Erinomainen hapon- ja em\u00e4skest\u00e4vyys<\/li>\n\n\n\n<li>\u2714 Edulliset raaka-aineet (liuskekivest\u00e4 valmistettu lasifritti)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Teolliset sovellukset<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Huokoisia SiC-keraamisia tukia k\u00e4ytet\u00e4\u00e4n laajalti seuraavissa sovelluksissa:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Teollisuuden j\u00e4tevedenpuhdistuskalvot<\/li>\n\n\n\n<li>Korkean l\u00e4mp\u00f6tilan kaasunsuodatusj\u00e4rjestelm\u00e4t<\/li>\n\n\n\n<li>Kemialliset erotus- ja puhdistusyksik\u00f6t<\/li>\n\n\n\n<li>Katalyyttien tukirakenteet<\/li>\n\n\n\n<li>Tarkkuusmikrosuodatuskalvot<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">P\u00e4\u00e4telm\u00e4<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e4ss\u00e4 tutkimuksessa esitell\u00e4\u00e4n kustannustehokas menetelm\u00e4 huokoisten SiC-keraamisten tukirakenteiden valmistamiseksi k\u00e4ytt\u00e4m\u00e4ll\u00e4 liuskeesta per\u00e4isin olevaa zirkoniumlasifriitti\u00e4 sintrausapuna.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e4rkeimpi\u00e4 tuloksia ovat:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sintrausl\u00e4mp\u00f6tilan merkitt\u00e4v\u00e4 lasku<\/li>\n\n\n\n<li>Huokosrakenteen hallittavuuden parantaminen<\/li>\n\n\n\n<li>Parannetut mekaaniset ominaisuudet ja l\u00e4p\u00e4isevyys<\/li>\n\n\n\n<li>Vahva kest\u00e4vyys happamissa ja em\u00e4ksisiss\u00e4 ymp\u00e4rist\u00f6iss\u00e4<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e4m\u00e4 tekniikka tarjoaa lupaavan tien SiC-pohjaisten keraamisten kalvotukien laajamittaiseen teolliseen k\u00e4ytt\u00f6\u00f6n vaativissa k\u00e4ytt\u00f6olosuhteissa.<\/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\/fi\/wp-json\/wp\/v2\/posts\/2387","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xkh-ceramics.com\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xkh-ceramics.com\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xkh-ceramics.com\/fi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xkh-ceramics.com\/fi\/wp-json\/wp\/v2\/comments?post=2387"}],"version-history":[{"count":1,"href":"https:\/\/www.xkh-ceramics.com\/fi\/wp-json\/wp\/v2\/posts\/2387\/revisions"}],"predecessor-version":[{"id":2390,"href":"https:\/\/www.xkh-ceramics.com\/fi\/wp-json\/wp\/v2\/posts\/2387\/revisions\/2390"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.xkh-ceramics.com\/fi\/wp-json\/wp\/v2\/media\/2389"}],"wp:attachment":[{"href":"https:\/\/www.xkh-ceramics.com\/fi\/wp-json\/wp\/v2\/media?parent=2387"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xkh-ceramics.com\/fi\/wp-json\/wp\/v2\/categories?post=2387"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xkh-ceramics.com\/fi\/wp-json\/wp\/v2\/tags?post=2387"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}