Oxid hlinit\u00fd (s chemick\u00fdm vzorcem Al\u2082O\u2083) je mimo\u0159\u00e1dn\u011b univerz\u00e1ln\u00ed pr\u016fmyslov\u00fd materi\u00e1l, kter\u00fd se pou\u017e\u00edv\u00e1 v \u0161irok\u00e9 \u0161k\u00e1le aplikac\u00ed, od keramiky a brusiv a\u017e po nosi\u010de katalyz\u00e1tor\u016f. N\u00e1\u0161 vysoce \u010dist\u00fd pr\u00e1\u0161kov\u00fd oxid hlinit\u00fd je ide\u00e1ln\u00ed pro \u0161pi\u010dkov\u00e1 polovodi\u010dov\u00e1 za\u0159\u00edzen\u00ed, kter\u00e1 vy\u017eaduj\u00ed v\u00fdjime\u010dnou \u010distotu p\u0159i lept\u00e1n\u00ed a vysok\u00fd v\u00fdkon, stejn\u011b jako pro dal\u0161\u00ed kritick\u00e9 aplikace vy\u017eaduj\u00edc\u00ed n\u00edzkou \u00farove\u0148 kontaminace a vynikaj\u00edc\u00ed odolnost proti opot\u0159eben\u00ed.<\/p>\n
Oxid hlinit\u00fd je z\u00e1kladn\u00ed materi\u00e1l pou\u017e\u00edvan\u00fd v mnoha vysoce v\u00fdkonn\u00fdch aplikac\u00edch, av\u0161ak vlastnosti keramick\u00fdch v\u00fdrobk\u016f z oxidu hlinit\u00e9ho z\u00e1vis\u00ed na jejich \u010distot\u011b. Pou\u017eit\u00ed vysoce \u010dist\u00e9ho oxidu hlinit\u00e9ho (HPA) zaru\u010duje, \u017ee keramika obsahuje minim\u00e1ln\u00ed mno\u017estv\u00ed kontaminant\u016f a ne\u010distot, co\u017e p\u0159isp\u00edv\u00e1 k lep\u0161\u00edmu \u0159\u00edzen\u00ed tepla a vylep\u0161en\u00fdm aplikac\u00edm v oblasti vysokofrekven\u010dn\u00ed techniky.<\/p>\n
HPA se vyr\u00e1b\u00ed tak, \u017ee se jako surovina rozpust\u00ed a vy\u010dist\u00ed hydroxid hlinit\u00fd, na\u010de\u017e se provede kalcinace za \u00fa\u010delem dosa\u017een\u00ed vy\u0161\u0161\u00ed \u010distoty. Tento proces se opakuje, dokud nen\u00ed dosa\u017eeno po\u017eadovan\u00e9 \u00farovn\u011b \u010distoty, \u010d\u00edm\u017e vznikne pr\u00e1\u0161ek oxidu hlinit\u00e9ho s mnoha \u017e\u00e1douc\u00edmi vlastnostmi, jako je chemick\u00e1 stabilita, vysok\u00e1 teplota t\u00e1n\u00ed, mechanick\u00e1 pevnost a tvrdost.<\/p>\n
Sf\u00e9rick\u00e9 pr\u00e1\u0161ky z oxidu hlinit\u00e9ho se vyzna\u010duj\u00ed v\u00fdjime\u010dnou tepelnou vodivost\u00ed, d\u00edky \u010demu\u017e jsou ide\u00e1ln\u00edm materi\u00e1lem pro pou\u017eit\u00ed jako vodiv\u00e9 podlo\u017eky a f\u00f3lie v elektronick\u00fdch za\u0159\u00edzen\u00edch. Jejich vynikaj\u00edc\u00ed schopnosti p\u0159enosu tepla a odvodu tepla pom\u00e1haj\u00ed p\u0159edch\u00e1zet p\u0159eh\u0159\u00e1t\u00ed i poruch\u00e1m za\u0159\u00edzen\u00ed zp\u016fsoben\u00fdm p\u0159eh\u0159\u00e1t\u00edm.<\/p>\n
Pr\u00e1\u0161ky z oxidu hlinit\u00e9ho se vyzna\u010duj\u00ed rovnom\u011brn\u00fdm rozlo\u017een\u00edm velikosti \u010d\u00e1stic, d\u00edky \u010demu\u017e jsou vhodn\u00e9 pro r\u016fzn\u00e9 le\u0161tic\u00ed aplikace a pom\u00e1haj\u00ed regulovat rychlost le\u0161t\u011bn\u00ed, co\u017e zaji\u0161\u0165uje rovnom\u011brn\u00e9 odstra\u0148ov\u00e1n\u00ed materi\u00e1lu z povrchu. D\u00edky sv\u00e9 univerz\u00e1lnosti je oxid hlinit\u00fd tak\u00e9 nepostradatelnou slo\u017ekou v r\u016fzn\u00fdch vysoce v\u00fdkonn\u00fdch keramick\u00fdch aplikac\u00edch, jako jsou filtra\u010dn\u00ed syst\u00e9my a aditivn\u00ed v\u00fdroba.<\/p>\n
Pr\u00e1\u0161ek z oxidu hlinit\u00e9ho lze rovn\u011b\u017e pou\u017e\u00edt k povrchov\u00e9 \u00faprav\u011b kovov\u00fdch podklad\u016f a zaji\u0161\u0165uje vynikaj\u00edc\u00ed odvod tepla v elektronick\u00fdch modulech a za\u0159\u00edzen\u00edch, jako jsou elektronick\u00e9 moduly a za\u0159\u00edzen\u00ed. Oxid hlinit\u00fd se \u010dasto pou\u017e\u00edv\u00e1 jako vynikaj\u00edc\u00ed tepeln\u011b vodiv\u00fd povlakov\u00fd materi\u00e1l pro desky s plo\u0161n\u00fdmi spoji a pouzdra integrovan\u00fdch obvod\u016f d\u00edky sv\u00e9 vysok\u00e9 tepeln\u00e9 vodivosti, n\u00edzk\u00e9 teplot\u011b t\u00e1n\u00ed a n\u00edzk\u00e9mu tlaku par \u2013 co\u017e znamen\u00e1, \u017ee sn\u00e1\u0161\u00ed vy\u0161\u0161\u00ed provozn\u00ed teploty, kter\u00e9 jsou pro tyto povlaky vy\u017eadov\u00e1ny.<\/p>\n
D\u00edky brusn\u00fdm \u010d\u00e1stic\u00edm oxidu hlinit\u00e9ho jednotn\u00e9 velikosti lze dos\u00e1hnout kontrolovan\u00e9 rychlosti le\u0161t\u011bn\u00ed a hladk\u00fdch povrch\u016f, co\u017e z n\u011bj \u010din\u00ed ide\u00e1ln\u00ed materi\u00e1l pro pokro\u010dilou technickou keramiku pou\u017e\u00edvanou v r\u016fzn\u00fdch pr\u016fmyslov\u00fdch odv\u011btv\u00edch, jako je leteck\u00fd a kosmick\u00fd pr\u016fmysl, automobilov\u00fd pr\u016fmysl a v\u00fdroba spot\u0159ebn\u00edho zbo\u017e\u00ed. Mezi oblasti pou\u017eit\u00ed produkt\u016f Alumina ATC pat\u0159\u00ed odjehlov\u00e1n\u00ed, le\u0161t\u011bn\u00ed, odstra\u0148ov\u00e1n\u00ed okuj\u00ed, \u010di\u0161t\u011bn\u00ed forem, p\u0159ed\u00faprava a p\u00edskov\u00e1n\u00ed kov\u016f.<\/p>\n
C\u00edlem t\u00e9to studie bylo zv\u00fd\u0161it odolnost proti opot\u0159eben\u00ed u keramiky z oxidu hlinit\u00e9ho pomoc\u00ed stopov\u00fdch mno\u017estv\u00ed Gd\u2082O\u2083. Byl p\u0159ipraven pr\u00e1\u0161ek oxidu hlinit\u00e9ho obsahuj\u00edc\u00ed r\u016fzn\u00e9 procentu\u00e1ln\u00ed pod\u00edly Gd\u2082O\u2083, kter\u00fd byl n\u00e1sledn\u011b vyhodnocen podle \u010d\u00ednsk\u00e9 pr\u016fmyslov\u00e9 normy z hlediska objemov\u00e9 hmotnosti, distribuce velikosti \u010d\u00e1stic, morfologie a soudr\u017enosti hranic zrn, a to p\u0159ed m\u011b\u0159en\u00edm m\u00edry opot\u0159eben\u00ed podle \u010d\u00ednsk\u00fdch norem. V\u00fdsledky prok\u00e1zaly, \u017ee p\u0159id\u00e1n\u00ed Gd\u2082O\u2083 m\u011blo pozitivn\u00ed vliv na f\u00e1zov\u00e9 p\u0159echody, z\u00fa\u017eilo hranice zrn a zv\u00fd\u0161ilo vazebn\u00e9 s\u00edly mezi sousedn\u00edmi zrny, co\u017e vedlo k v\u00fdrazn\u011b lep\u0161\u00ed odolnosti proti opot\u0159eben\u00ed u keramiky z oxidu hlinit\u00e9ho ve srovn\u00e1n\u00ed s p\u0159edchoz\u00edmi konstrukcemi; m\u00edra opot\u0159eben\u00ed se zvy\u0161ovala parabolicky s rostouc\u00edm obsahem Gd\u2082O\u2083 s ka\u017ed\u00fdm dal\u0161\u00edm procentn\u00edm n\u00e1r\u016fstem jeho pod\u00edlu.<\/p>","protected":false},"excerpt":{"rendered":"
Unleash Ultimate Purity and Performance With Alumina Powder Alumina (with the chemical formula Al2O3) is an extremely versatile industrial material, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","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":"","theme-transparent-header-meta":"default","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":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","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-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-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-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-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-gradient":""}},"footnotes":""},"categories":[11],"tags":[],"class_list":["post-73","post","type-post","status-publish","format-standard","hentry","category-product"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/aluminapowder.net\/cs\/wp-json\/wp\/v2\/posts\/73","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aluminapowder.net\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aluminapowder.net\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aluminapowder.net\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aluminapowder.net\/cs\/wp-json\/wp\/v2\/comments?post=73"}],"version-history":[{"count":1,"href":"https:\/\/aluminapowder.net\/cs\/wp-json\/wp\/v2\/posts\/73\/revisions"}],"predecessor-version":[{"id":74,"href":"https:\/\/aluminapowder.net\/cs\/wp-json\/wp\/v2\/posts\/73\/revisions\/74"}],"wp:attachment":[{"href":"https:\/\/aluminapowder.net\/cs\/wp-json\/wp\/v2\/media?parent=73"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aluminapowder.net\/cs\/wp-json\/wp\/v2\/categories?post=73"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aluminapowder.net\/cs\/wp-json\/wp\/v2\/tags?post=73"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}