{"id":92,"date":"2024-06-04T11:30:57","date_gmt":"2024-06-04T03:30:57","guid":{"rendered":"https:\/\/aluminaceramics.net\/?p=92"},"modified":"2024-07-15T20:17:54","modified_gmt":"2024-07-15T12:17:54","slug":"co-je-hustota-oxidu-hliniteho","status":"publish","type":"post","link":"https:\/\/aluminaceramics.net\/cs\/what-is-alumina-density\/","title":{"rendered":"Co je hustota oxidu hlinit\u00e9ho?"},"content":{"rendered":"<p>Oxid hlinit\u00fd (Al2O3) je jednou z nejpou\u017e\u00edvan\u011bj\u0161\u00edch technick\u00fdch keramik. M\u00e1 mnoho v\u00fdhodn\u00fdch a jedine\u010dn\u00fdch vlastnost\u00ed, d\u00edky nim\u017e je vhodn\u00fd pro celou \u0159adu pr\u016fmyslov\u00fdch aplikac\u00ed.<\/p>\n<p>Slitina hlin\u00edku je zn\u00e1m\u00e1 svou vysokou odolnost\u00ed proti korozi a teplot\u00e1m. Nav\u00edc jej\u00ed vynikaj\u00edc\u00ed odolnost proti ot\u011bru pom\u00e1h\u00e1 prodlou\u017eit \u017eivotnost komponent\u016f a d\u00edl\u016f vyroben\u00fdch z tohoto materi\u00e1lu.<\/p>\n<h2>Hromadn\u00e9<\/h2>\n<p>Hlin\u00edk je m\u011bkk\u00fd, ale lze jej zes\u00edlit legov\u00e1n\u00edm s mal\u00fdm mno\u017estv\u00edm m\u011bdi, ho\u0159\u010d\u00edku, k\u0159em\u00edku nebo manganu, \u010d\u00edm\u017e se vytvo\u0159\u00ed pevn\u011bj\u0161\u00ed slitiny, kter\u00e9 tento kov \u010din\u00ed je\u0161t\u011b univerz\u00e1ln\u011bj\u0161\u00edm z hlediska elektrick\u00e9 a tepeln\u00e9 vodivosti, pevnosti, ta\u017enosti a odolnosti proti korozi. Nav\u00edc je lehk\u00fd - co\u017e je v\u00fdhoda pro mnoho aplikac\u00ed! Univerz\u00e1lnost hlin\u00edku tak\u00e9 umo\u017e\u0148uje jeho snadn\u00e9 tvarov\u00e1n\u00ed do r\u016fzn\u00fdch v\u00fdrobk\u016f, kter\u00e9 mohou vyhovovat jak\u00e9mukoli mysliteln\u00e9mu \u00fa\u010delu.<\/p>\n<p>Hlin\u00edk se vyskytuje jako \u010dist\u00fd kov i jako oxid v zemsk\u00e9 k\u016f\u0159e v lo\u017eisc\u00edch bauxitov\u00fdch rud, kde tvo\u0159\u00ed netoxick\u00e9 usazeniny s m\u011bkk\u00fdmi vlastnostmi a atomov\u00fdm \u010d\u00edslem 13. D\u00edky sv\u00e9 st\u0159\u00edb\u0159it\u011b b\u00edl\u00e9 barv\u011b a kovov\u00e9mu lesku lze hlin\u00edk snadno oh\u00fdbat, stloukat nebo lisovat do tenk\u00fdch plech\u016f pro v\u00fdrobu a lze jej dokonce pokr\u00fdt ochrannou bari\u00e9rou z oxidu, kter\u00e1 odol\u00e1v\u00e1 korozi t\u00edm, \u017ee si vytv\u00e1\u0159\u00ed vlastn\u00ed ochrann\u00fd oxidov\u00fd povlak.<\/p>\n<p>Hlin\u00edk je zn\u00e1m\u00fd p\u0159edev\u0161\u00edm jako abrazivn\u00ed nebo \u017e\u00e1ruvzdorn\u00fd materi\u00e1l. Krom\u011b toho jej lze nal\u00e9zt v keramice, elektrick\u00fdch izol\u00e1torech, katalyz\u00e1torech a katalytick\u00fdch aplikac\u00edch. Existuje cel\u00e1 \u0159ada druh\u016f, kter\u00e9 lze pro v\u00fdrobn\u00ed \u00fa\u010dely vyr\u00e1b\u011bt v podob\u011b pr\u00e1\u0161k\u016f nebo granul\u00ed r\u016fzn\u00fdch velikost\u00ed zrn.<\/p>\n<p>Chemick\u00e1 stabilita tohoto materi\u00e1lu je vysok\u00e1, tak\u017ee je vhodn\u00fd pro vystaven\u00ed sol\u00edm, kyselin\u00e1m a par\u00e1m, ani\u017e by do\u0161lo k po\u0161kozen\u00ed povrchu nebo konstrukce od\u011brem, koroz\u00ed, mrazem nebo opot\u0159eben\u00edm. Nav\u00edc d\u00edky sv\u00e9 trvanlivosti odol\u00e1v\u00e1 vysok\u00fdm teplot\u00e1m, ani\u017e by podl\u00e9hal l\u00e1m\u00e1n\u00ed nebo degradaci.<\/p>\n<p>Hlin\u00edk pat\u0159\u00ed v periodick\u00e9 tabulce do skupiny alkalick\u00fdch zemin a m\u00e1 atomovou hmotnost 2698 g\/mol a t\u0159i valen\u010dn\u00ed elektrony. Reakce mezi kysl\u00edkem a hlin\u00edkem prob\u00edhaj\u00ed pomalu, zat\u00edmco reakce mezi hlin\u00edkem a hork\u00fdmi kyselinami a z\u00e1sadami prob\u00edhaj\u00ed rychle.<\/p>\n<p>Hlin\u00edk (Al2O3) se hojn\u011b vyskytuje v zemsk\u00e9 k\u016f\u0159e a pou\u017e\u00edv\u00e1 se k r\u016fzn\u00fdm \u00fa\u010del\u016fm. Vyzna\u010duje se vysokou teplotou t\u00e1n\u00ed a vynikaj\u00edc\u00edmi mechanick\u00fdmi a fyzik\u00e1ln\u00edmi vlastnostmi, jako je tvrdost, pevnost a n\u00edzk\u00fd koeficient rozta\u017enosti - vlastnosti, d\u00edky nim\u017e je vhodn\u00fd jako \u017e\u00e1ruvzdorn\u00fd materi\u00e1l, elektrick\u00fd izolant a chemick\u00fd nosi\u010d - a je tak vhodn\u00fd pro v\u00fdrobu cihel, kel\u00edmk\u016f, laboratorn\u00edho zbo\u017e\u00ed, pap\u00edrov\u00fdch zapalovac\u00edch sv\u00ed\u010dek, n\u00e1t\u011br\u016f pro ultrafiltra\u010dn\u00ed chromatografickou anal\u00fdzu skla a tak\u00e9 pro v\u00fdrobu kovov\u00e9ho hlin\u00edku a jeho slou\u010denin.<\/p>\n<h2>Svazek<\/h2>\n<p>Hlin\u00edk je technick\u00e1 keramika, kter\u00e1 se d\u00edky sv\u00fdm vynikaj\u00edc\u00edm vlastnostem pou\u017e\u00edv\u00e1 v \u0161irok\u00e9 \u0161k\u00e1le aplikac\u00ed. Hlin\u00edk se vyzna\u010duje vysokou mechanickou pevnost\u00ed, pevnost\u00ed v tlaku, tvrdost\u00ed a odolnost\u00ed proti korozi a opot\u0159eben\u00ed, jako\u017e i n\u00edzkou tepelnou rozta\u017enost\u00ed a chemickou inertnost\u00ed. Krom\u011b toho p\u016fsob\u00ed oxid hlinit\u00fd ve sm\u011bsi se zah\u0159\u00e1tou z\u0159ed\u011bnou kyselinou chlorovod\u00edkovou jak kysele, tak z\u00e1sadit\u011b, zat\u00edmco v kombinaci s kyselinou s\u00edrovou p\u016fsob\u00ed z\u00e1sadit\u011b.<\/p>\n<p>Objem oxidu hlinit\u00e9ho lze vyj\u00e1d\u0159it jako pod\u00edl jeho hmotnosti a hustoty v centimetrech krychlov\u00fdch (g\/cm3), co\u017e z n\u011bj d\u011bl\u00e1 z\u00e1kladn\u00ed charakteristiku, proto\u017ee ud\u00e1v\u00e1, kolik dutin se v materi\u00e1lu nach\u00e1z\u00ed - \u010d\u00edm ni\u017e\u0161\u00ed je obsah dutin, t\u00edm v\u011bt\u0161\u00ed je jeho objem. Vliv m\u00e1 tak\u00e9 teplota, proto\u017ee vy\u0161\u0161\u00ed teploty vedou ke zv\u00fd\u0161en\u00ed hustoty.<\/p>\n<p>Bauxit je p\u0159irozen\u011b se vyskytuj\u00edc\u00ed heterogenn\u00ed materi\u00e1l slo\u017een\u00fd z jednoho nebo v\u00edce miner\u00e1l\u016f hydroxidu hlinit\u00e9ho obsahuj\u00edc\u00edch v r\u016fzn\u00fdch koncentrac\u00edch dal\u0161\u00ed prvky a slou\u010deniny, jako je oxid k\u0159emi\u010dit\u00fd, oxid \u017eelezit\u00fd, titani\u010dit\u00fd a hlinitok\u0159emi\u010dit\u00fd. P\u0159ibli\u017en\u011b 85% sv\u011btov\u00e9 produkce vyu\u017e\u00edv\u00e1 k p\u0159em\u011bn\u011b bauxitu na oxid hlinit\u00fd metodu mokr\u00e9ho chemick\u00e9ho lou\u017een\u00ed zn\u00e1mou jako Bayer\u016fv proces.<\/p>\n<p>G-hlin\u00edk je extr\u00e9mn\u011b mezopor\u00e9zn\u00ed forma oxidu hlinit\u00e9ho s velk\u00fdmi p\u00f3ry, kter\u00e1 m\u00e1 vysokou p\u00f3rovitost a povrch, co\u017e z n\u011bj \u010din\u00ed vynikaj\u00edc\u00ed podp\u016frn\u00fd materi\u00e1l pro katalyz\u00e1tory na b\u00e1zi Fe pro reakci hydroxylace fenolu s peroxidem vod\u00edku, p\u0159i n\u00ed\u017e vznikaj\u00ed cenn\u00e9 organick\u00e9 slou\u010deniny, jako je hydrochinon a katechol. G-hlin\u00edk se m\u016f\u017ee pochlubit vynikaj\u00edc\u00ed konverz\u00ed 53,4% k tomuto procesu a z\u00e1rove\u0148 selektivitou v\u016f\u010di d-hydroxybenzen\u016fm 96,2 %, co\u017e d\u00e1le podtrhuje jeho hodnotu jako pr\u016fmyslov\u00e9ho katalyz\u00e1toru.<\/p>\n<p>Gama f\u00e1zov\u00fd oxid hlinit\u00fd lze formovat do mikropor\u00e9zn\u00edch vo\u0161tinov\u00fdch struktur s vysokou katalytickou aktivitou, co\u017e z n\u011bj \u010din\u00ed atraktivn\u00ed materi\u00e1l pro podporu mnoha pr\u016fmyslov\u00fdch katalyz\u00e1tor\u016f p\u0159i rafinaci ropy. Krom\u011b toho v\u00fdzkum jeho potenci\u00e1lu jako substr\u00e1tu pro p\u0159\u00edpravu nanofiltra\u010dn\u00edch membr\u00e1n p\u0159inesl slibn\u00e9 prvn\u00ed v\u00fdsledky; tento typ oxidu hlinit\u00e9ho se nav\u00edc pou\u017e\u00edv\u00e1 pro vytv\u00e1\u0159en\u00ed syntetick\u00fdch saf\u00edr\u016f pot\u0159ebn\u00fdch pro n\u011bkter\u00e9 polovodi\u010dov\u00e9 sou\u010d\u00e1stky.<\/p>\n<h2>Hustota<\/h2>\n<p>Oxid hlinit\u00fd je polykrystalick\u00e1 keramika s n\u00edzkou m\u011brnou hmotnost\u00ed a vysokou tvrdost\u00ed, kter\u00e1 nab\u00edz\u00ed n\u00edzkou m\u011brnou hmotnost a vynikaj\u00edc\u00ed tvrdost. Hlin\u00edk je k dispozici v r\u016fzn\u00fdch \u010distot\u00e1ch a lze jej vst\u0159ikovat, lisovat, izostaticky lisovat, odl\u00e9vat do kluzn\u00fdch forem nebo vytla\u010dovat do po\u017eadovan\u00fdch tvar\u016f p\u0159ed vyp\u00e1len\u00edm a slinov\u00e1n\u00edm - podobn\u011b jako kovy a slitiny lze snadn\u011bji opracov\u00e1vat standardn\u00edmi technikami; jeho st\u0159edn\u00ed pevnost v tahu, ale k\u0159ehkost \u010din\u00ed v\u00fdrobu mnohem m\u00e9n\u011b efektivn\u00ed; vlastnosti tepeln\u00e9 vodivosti \u010din\u00ed hlin\u00edk ide\u00e1ln\u00edm, proto\u017ee odol\u00e1v\u00e1 \u00fatok\u016fm alk\u00e1li\u00ed i siln\u00fdch kyselin, pokud doch\u00e1z\u00ed k v\u00fdrobn\u00edm proces\u016fm s pou\u017eit\u00edm materi\u00e1l\u016f z hlin\u00edku.<\/p>\n<p>Hlin\u00edk se pou\u017e\u00edv\u00e1 jako d\u016fle\u017eit\u00e1 surovina p\u0159i v\u00fdrob\u011b kovov\u00e9ho hlin\u00edku a v mnoha pr\u016fmyslov\u00fdch aplikac\u00edch, v\u010detn\u011b elektrick\u00fdch, chemick\u00fdch, leteck\u00fdch a ot\u011bruvzdorn\u00fdch sou\u010d\u00e1st\u00ed. Hlin\u00edk lze nal\u00e9zt tak\u00e9 ve zdravotnick\u00fdch pom\u016fck\u00e1ch, jako jsou ky\u010deln\u00ed implant\u00e1ty a zubn\u00ed korunky; d\u00edky sv\u00e9 odolnosti proti ot\u011bru je vhodn\u00fd tak\u00e9 pro r\u016fzn\u00e1 abrazivn\u00ed pou\u017eit\u00ed, jako jsou textiln\u00ed vod\u00edtka, p\u00edsty \u010derpadel, oblo\u017een\u00ed \u017elab\u016f a v\u00fdpustn\u00fdch otvor\u016f.<\/p>\n<p>Korund je jednou z n\u011bkolika forem oxidu hlinit\u00e9ho s ionty kysl\u00edku zabalen\u00fdmi do hexagon\u00e1ln\u00edho t\u011bsn\u00e9ho uspo\u0159\u00e1d\u00e1n\u00ed a s ionty hlin\u00edku rozm\u00edst\u011bn\u00fdmi ve dvou t\u0159etin\u00e1ch oktaedrick\u00fdch mezer v hexagon\u00e1ln\u00edch t\u011bsn\u00fdch struktur\u00e1ch, jako\u017e i s ionty hlin\u00edku, kter\u00e9 se nach\u00e1zej\u00ed mezi \u0161esti ionty kysl\u00edku v ka\u017ed\u00e9m oktaedru a jejich \u0161esti kysl\u00edkov\u00fdmi prot\u011bj\u0161ky tvo\u0159\u00edc\u00edmi nepravidelnou krystalovou strukturu s jednou st\u011bnou spole\u010dnou pro t\u0159i strany oktaedr\u016f horn\u00ed vrstvy.<\/p>\n<p>Hlin\u00edk m\u016f\u017ee plnit n\u011bkolik funkc\u00ed. Krom\u011b toho, \u017ee se pou\u017e\u00edv\u00e1 jako brusivo, p\u016fsob\u00ed tak\u00e9 jako elektrick\u00fd izolant a je \u0161iroce vyu\u017e\u00edv\u00e1n v litografii k\u0159em\u00edku na saf\u00edru pro integrovan\u00e9 obvody, slou\u017e\u00ed jako tunelov\u00e1 bari\u00e9ra v supravodiv\u00fdch za\u0159\u00edzen\u00edch, jako jsou jednoelektronov\u00e9 tranzistory a supravodiv\u00e1 kvantov\u00e1 interferen\u010dn\u00ed za\u0159\u00edzen\u00ed, a funguje jako meziprodukt p\u0159i v\u00fdrob\u011b v\u00fdrobn\u00edho substr\u00e1tu z karbidu wolframu odoln\u00e9ho proti opot\u0159eben\u00ed. Bohu\u017eel vzhledem k ni\u017e\u0161\u00ed r\u00e1zov\u00e9 hou\u017eevnatosti se oxid hlinit\u00fd kv\u016fli tomuto faktoru zat\u00edm nestal hou\u017eevnat\u00fdm materi\u00e1lem odoln\u00fdm proti opot\u0159eben\u00ed, kter\u00fd by se pou\u017e\u00edval v d\u016fln\u00edch aplikac\u00edch.<\/p>\n<p>Vdechov\u00e1n\u00ed prachu oxidu hlinit\u00e9ho p\u0159edstavuje potenci\u00e1ln\u00ed pracovn\u00ed riziko, p\u0159i\u010dem\u017e studie s pou\u017eit\u00edm radioaktivn\u011b zna\u010den\u00e9ho 26Al ukazuj\u00ed, \u017ee m\u016f\u017ee proniknout hluboko do plic a z\u016fstat tam po del\u0161\u00ed dobu, co\u017e m\u016f\u017ee naru\u0161it norm\u00e1ln\u00ed funkci plic a b\u00fdt karcinogenn\u00ed.<\/p>\n<h2>P\u00f3rovitost<\/h2>\n<p>P\u00f3rovitost materi\u00e1l\u016f ozna\u010duje mno\u017estv\u00ed vzduchu v pevn\u00fdch materi\u00e1lech, obvykle se vyjad\u0159uje v procentech. P\u00f3rovitost m\u016f\u017ee pomoci ur\u010dit jejich hustotu; v\u00edce dutin znamen\u00e1 men\u0161\u00ed hustotu materi\u00e1l\u016f.<\/p>\n<p>Pro p\u0159esn\u00e9 posouzen\u00ed p\u00f3rovitosti je vhodn\u00fd rastrovac\u00ed elektronov\u00fd mikroskop (SEM). SEM jasn\u011b a p\u0159esn\u011b zobrazuje prostory p\u00f3r\u016f a z\u00e1rove\u0148 m\u011b\u0159\u00ed jejich propustnost - neboli schopnost vody proch\u00e1zet materi\u00e1lem - pomoc\u00ed metod, jako je pono\u0159en\u00ed vzork\u016f do kapaliny, nap\u0159\u00edklad helia nebo vody, nebo pomoc\u00ed imbibi\u010dn\u00edch metod; v\u00edce propojen\u00fdch p\u00f3r\u016f zvy\u0161uje propustnost.<\/p>\n<p>Oxid hlinit\u00fd je extr\u00e9mn\u011b tvrd\u00fd materi\u00e1l, co\u017e znamen\u00e1, \u017ee \u00fa\u010dinn\u011b odol\u00e1v\u00e1 mechanick\u00e9mu ot\u011bru a opot\u0159eben\u00ed, co\u017e je jeden z d\u016fvod\u016f, pro\u010d se stal jednou z nejobl\u00edben\u011bj\u0161\u00edch technick\u00fdch keramik pou\u017e\u00edvan\u00fdch pro vst\u0159ikov\u00e1n\u00ed.<\/p>\n<p>Oxid hlinit\u00fd m\u00e1 v\u0161ak n\u011bkter\u00e9 nev\u00fdhody. Zejm\u00e9na jeho elektrick\u00e9 vlastnosti nejsou p\u0159i vy\u0161\u0161\u00edch teplot\u00e1ch p\u0159\u00edli\u0161 dobr\u00e9, m\u00e1 n\u00edzkou vodivost, proto\u017ee nen\u00ed p\u0159\u00edli\u0161 krystalick\u00fd a m\u00e1 mnoho defekt\u016f v atomech, z nich\u017e je slo\u017een.<\/p>\n<p>\u00da\u010dinn\u00fdm zp\u016fsobem, jak zv\u00fd\u0161it elektrick\u00e9 vlastnosti oxidu hlinit\u00e9ho, je zv\u00fd\u0161it jeho krystalickou strukturu p\u0159id\u00e1n\u00edm p\u0159\u00edm\u011bs\u00ed nebo zah\u0159\u00edv\u00e1n\u00edm p\u0159i vy\u0161\u0161\u00edch teplot\u00e1ch. Takov\u00e9 zm\u011bny v\u0161ak mohou m\u00edt v\u00fdznamn\u00e9 d\u016fsledky pro pevnost a tvrdost materi\u00e1lu oxidu hlinit\u00e9ho pou\u017e\u00edvan\u00e9ho v ur\u010dit\u00fdch aplikac\u00edch a p\u0159i nespr\u00e1vn\u00e9 aplikaci mohou zp\u016fsobit probl\u00e9my.<\/p>\n<p>Zlep\u0161en\u00ed elektrick\u00fdch vlastnost\u00ed oxidu hlinit\u00e9ho vytvo\u0159en\u00edm v\u011bt\u0161\u00edho prostoru pro p\u00f3ry m\u016f\u017ee rovn\u011b\u017e zlep\u0161it jeho vlastnosti zv\u00fd\u0161en\u00edm koncentrace oxidu hlinit\u00e9ho v jeho slo\u017een\u00ed. V\u00fdhodou jsou tak\u00e9 m\u011bk\u010d\u00ed a tv\u00e1rn\u011bj\u0161\u00ed materi\u00e1ly s v\u011bt\u0161\u00edm mno\u017estv\u00edm p\u00f3r\u016f.<\/p>\n<p>Mezopor\u00e9zn\u00ed oxid hlinit\u00fd je dal\u0161\u00edm typem materi\u00e1lu s vysoce rovnom\u011brn\u00fdmi kan\u00e1lky a velk\u00fdmi povrchov\u00fdmi plochami, kter\u00e9 vytv\u00e1\u0159ej\u00ed mezop\u00f3ry se zv\u00fd\u0161en\u00fdm elektrick\u00fdm odporem p\u0159i pokojov\u00fdch teplot\u00e1ch (dva \u0159\u00e1dy p\u0159i n\u00edzk\u00fdch teplot\u00e1ch; \u010dty\u0159i \u0159\u00e1dy p\u0159i vysok\u00fdch teplot\u00e1ch), co\u017e se m\u016f\u017ee uk\u00e1zat jako nev\u00fdhodn\u00e9 p\u0159i pou\u017eit\u00ed pro v\u00fdrobu bateri\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"<p>Alumina (aluminum oxide, Al2O3) is one of the most widely utilized technical ceramics. With many beneficial and unique properties that [&hellip;]<\/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":"","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":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","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":[6],"tags":[],"class_list":["post-92","post","type-post","status-publish","format-standard","hentry","category-alumina-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/posts\/92","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/comments?post=92"}],"version-history":[{"count":1,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/posts\/92\/revisions"}],"predecessor-version":[{"id":93,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/posts\/92\/revisions\/93"}],"wp:attachment":[{"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/media?parent=92"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/categories?post=92"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/tags?post=92"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}