Hlin\u00edk je extr\u00e9mn\u011b hou\u017eevnat\u00fd materi\u00e1l pou\u017e\u00edvan\u00fd v mnoha pr\u016fmyslov\u00fdch aplikac\u00edch. Jako hlavn\u00ed komer\u010dn\u00ed produkt z oxidu hlinit\u00e9ho se oxid hlinit\u00fd vyr\u00e1b\u00ed ze such\u00e9 drcen\u00e9 a pran\u00e9 bauxitov\u00e9 rudy obsahuj\u00edc\u00ed gibsit, boehmit a diaspor, kter\u00e9 obsahuj\u00ed miner\u00e1ly hydroxidu hlinit\u00e9ho, je\u017e p\u0159isp\u00edvaj\u00ed k jeho slo\u017een\u00ed.<\/p>\n
Kalcinovan\u00fd oxid hlinit\u00fd se v tavenin\u00e1ch glazur \u0161patn\u011b rozpou\u0161t\u00ed, tak\u017ee zdrojem Al2O3 pro glazury je obvykle kaolin nebo pyrofylit.<\/p>\n
Hlin\u00edk m\u00e1 d\u00edky sv\u00e9 v\u00fdjime\u010dn\u00e9 pevnosti, chemick\u00e9 inertnosti a odolnosti proti korozi mnohostrann\u00e9 vyu\u017eit\u00ed, co\u017e z n\u011bj \u010din\u00ed univerz\u00e1ln\u00ed materi\u00e1l v mnoha pr\u016fmyslov\u00fdch procesech a v\u00fdrobn\u00edch operac\u00edch. Pou\u017eit\u00ed \u017e\u00e1ruvzdorn\u00e9ho materi\u00e1lu p\u0159i v\u00fdrob\u011b roztaven\u00e9ho skla se uk\u00e1zalo jako obzvl\u00e1\u0161t\u011b u\u017eite\u010dn\u00e9, proto\u017ee bez p\u0159id\u00e1n\u00ed stabilizace a tepeln\u00e9 izolace do sm\u011bsi m\u016f\u017ee pom\u011brn\u011b rychle doj\u00edt k devitrifikaci (krystalizaci) - \u010demu\u017e oxid hlinit\u00fd pom\u00e1h\u00e1 zabr\u00e1nit t\u00edm, \u017ee poskytuje stabilitu a tepeln\u011b izola\u010dn\u00ed vlastnosti b\u011bhem f\u00e1ze taven\u00ed.<\/p>\n
Hlin\u00edk se obvykle vyr\u00e1b\u00ed z miner\u00e1lu bauxitu, kter\u00fd obsahuje 30-55% Al2O3. Bauxit se t\u011b\u017e\u00ed a drt\u00ed na ka\u0161i, pot\u00e9 se pos\u00edl\u00e1 p\u0159es n\u011bkolik sr\u00e1\u017eec\u00edch n\u00e1dr\u017e\u00ed, aby se z n\u011bj odstranily ne\u010distoty, a pak se p\u0159es n\u011b vrac\u00ed zp\u011bt v procesu zvan\u00e9m v\u00fdsev, kter\u00fd podporuje tvorbu pevn\u00fdch krystal\u016f hydroxidu hlinit\u00e9ho - tyto pevn\u00e9 krystaly se pak p\u0159epravuj\u00ed zp\u011bt p\u0159es sr\u00e1\u017eec\u00ed n\u00e1dr\u017ee, ne\u017e se po\u0161lou p\u0159\u00edmo do pece k zah\u0159\u00e1t\u00ed, aby se vytvo\u0159il oxid hlinit\u00fd.<\/p>\n
Vysok\u00e1 teplotn\u00ed tolerance oxidu hlinit\u00e9ho al2o3 z n\u011bj \u010din\u00ed ide\u00e1ln\u00ed materi\u00e1l pro pou\u017eit\u00ed v \u017e\u00e1ruvzdorn\u00fdch v\u00fdrobc\u00edch, kter\u00e9 jsou nezbytn\u00e9 v pr\u016fmyslov\u00fdch procesech vy\u017eaduj\u00edc\u00edch vysok\u00e9 teploty, jako je petrochemick\u00e9 zpracov\u00e1n\u00ed, v\u00fdroba cementu, spalov\u00e1n\u00ed odpadu a v\u00fdroba \u017eeleza a oceli. P\u0159id\u00e1n\u00edm pr\u00e1\u0161kov\u00e9ho oxidu hlinit\u00e9ho lze nav\u00edc zlep\u0161it pevnost a tvrdost pry\u017eov\u00fdch sm\u011bs\u00ed.<\/p>\n
Hlin\u00edkov\u00e1 keramika, d\u016fle\u017eit\u00e1 t\u0159\u00edda pokro\u010dil\u00fdch keramick\u00fdch materi\u00e1l\u016f, ji obsahuje jako kl\u00ed\u010dovou slo\u017eku. Vyr\u00e1b\u011bj\u00ed se v r\u016fzn\u00fdch tvarech a konfigurac\u00edch, aby vyhovovaly specifick\u00fdm aplika\u010dn\u00edm pot\u0159eb\u00e1m, a maj\u00ed vynikaj\u00edc\u00ed mechanick\u00e9 vlastnosti, jako jsou vysok\u00e9 pevnosti v tahu, pevnosti v tlaku, moduly tvrdosti v ohybu a tvrdost, a jsou tak\u00e9 vysoce odoln\u00e9 proti teplu a ot\u011bru.<\/p>\n
Hlin\u00edk lze tak\u00e9 vyu\u017e\u00edt jako nosi\u010d p\u0159i katalytick\u00fdch reakc\u00edch. Gama oxid hlinit\u00fd (gama-Al2O3) m\u016f\u017ee plnit tuto funkci t\u00edm, \u017ee nab\u00edz\u00ed velk\u00e9 plochy povrchu, na kter\u00e9 mohou p\u0159ilnout reaktanty, a t\u00edm zv\u00fd\u0161it rychlost reakce. Jeho por\u00e9zn\u00ed krystalick\u00e1 struktura nav\u00edc usnad\u0148uje dispergaci v kapaln\u00fdch m\u00e9di\u00edch, co\u017e \u010din\u00ed tento materi\u00e1l u\u017eivatelsky p\u0159\u00edv\u011btiv\u00fdm v laboratorn\u00edch podm\u00ednk\u00e1ch.<\/p>\n
D\u00edky sv\u00e9 vynikaj\u00edc\u00ed tvrdosti a trvanlivosti se oxid hlinit\u00fd \u010dasto pou\u017e\u00edv\u00e1 jako brusn\u00fd materi\u00e1l. Jeho tvrd\u00fd povrch pom\u00e1h\u00e1 tvarovat pr\u016fmyslov\u00e9 v\u00fdrobky a stroje, zat\u00edmco jeho povlak je chr\u00e1n\u00ed p\u0159ed dal\u0161\u00edm ot\u011brem.<\/p>\n
P\u0159esto\u017ee se oxid hlinit\u00fd m\u016f\u017ee pochlubit mnoha p\u016fsobiv\u00fdmi vlastnostmi, m\u00e1 n\u011bkter\u00e9 ne\u017e\u00e1douc\u00ed vedlej\u0161\u00ed \u00fa\u010dinky, kter\u00e9 je t\u0159eba p\u0159i pou\u017eit\u00ed ve sladkovodn\u00edm prost\u0159ed\u00ed zv\u00e1\u017eit. Obzvl\u00e1\u0161t\u011b znepokojuj\u00edc\u00ed je jeho toxicita v\u016f\u010di sladkovodn\u00edm bezobratl\u00fdm; ned\u00e1vn\u00fd v\u00fdzkum to nazna\u010dil, kdy\u017e expozice AlNPs vedla ke sn\u00ed\u017een\u00ed \u017eivotaschopnosti vodn\u00edch bezobratl\u00fdch Ceriodaphnia dubia. V\u00fdzkumn\u00edci p\u0159edpokl\u00e1dali, \u017ee to bylo zp\u016fsobeno zv\u00fd\u0161en\u00fdm oxida\u010dn\u00edm stresem v organismu, a zaznamenali, jak se cytotoxicita zvy\u0161ovala s velikost\u00ed \u010d\u00e1stic.<\/p>\n
Hlin\u00edk je jednou z nej\u010dast\u011bji pou\u017e\u00edvan\u00fdch technick\u00fdch keramik. Vyzna\u010duje se vysokou mechanickou pevnost\u00ed, vynikaj\u00edc\u00ed elektrickou izolac\u00ed, odolnost\u00ed proti chemick\u00fdm vliv\u016fm a tepeln\u00fdm \u0161ok\u016fm a je odoln\u00fd proti korozi. Hlin\u00edk se rovn\u011b\u017e vyzna\u010duje vysokou teplotou t\u00e1n\u00ed.<\/p>\n
Hlavn\u00edm zdrojem v\u00fdroby oxidu hlinit\u00e9ho je bauxitov\u00e1 ruda. Bauxit obsahuje gibbsit (Al(OH)3), boehmit (oxid hlinit\u00fd G), diaspor (a-hlin\u00edk) a jako p\u0159\u00edm\u011bsi jsou p\u0159\u00edtomny oxidy \u017eeleza, k\u0159emi\u010ditany a k\u0159emen. Bauxit m\u016f\u017ee b\u00fdt zpracov\u00e1n Bayerov\u00fdm procesem, p\u0159i kter\u00e9m se z\u00edsk\u00e1v\u00e1 nejen oxid hlinit\u00fd, ale tak\u00e9 vedlej\u0161\u00ed produkty, jako je borax, kaustick\u00e1 soda a v\u00fdroba hydroxidu hlinit\u00e9ho.<\/p>\n
P\u0159i Bayerov\u011b procesu se boehmit a gibbsit odd\u011bluj\u00ed od bauxitu rozpou\u0161t\u011bn\u00edm v roztoc\u00edch NaOH za m\u00edrn\u00fdch hydroterm\u00e1ln\u00edch podm\u00ednek. Po filtraci se sr\u00e1\u017e\u00ed vysr\u00e1\u017een\u00fd oxid hlinit\u00fd. Nakonec se tento pevn\u00fd produkt kalcinuje, dokud nevznikne \u010dist\u00fd al2o3.<\/p>\n
Oxid hlinit\u00fd je amfotern\u00ed oxid, co\u017e znamen\u00e1, \u017ee obsahuje kladn\u00e9 i z\u00e1porn\u00e9 ionty. Krystalov\u00e1 m\u0159\u00ed\u017eka oxidu hlinit\u00e9ho se skl\u00e1d\u00e1 z aniont\u016f kysl\u00edku uspo\u0159\u00e1dan\u00fdch v hexagon\u00e1ln\u00edch t\u011bsn\u011b uspo\u0159\u00e1dan\u00fdch struktur\u00e1ch; kationty hlin\u00edku obsazuj\u00ed ur\u010dit\u00e1 oktaedrick\u00e1 m\u00edsta v t\u00e9to struktu\u0159e, zat\u00edmco n\u011bkter\u00e1 z\u016fst\u00e1vaj\u00ed voln\u00e1 - tato voln\u00e1 m\u00edsta mohou b\u00fdt vypln\u011bna kationty kov\u016f nebo anionty oxid\u016f, kter\u00e9 d\u00e1vaj\u00ed materi\u00e1lu jeho charakteristickou katalytickou aktivitu.<\/p>\n
\u010cist\u00fd oxid hlinit\u00fd al2o3 vykazuje n\u00edzkou elektrickou vodivost, kter\u00e1 se zvy\u0161uje s teplotou a \u010distotou. Tento jev je d\u016fsledkem toho, \u017ee jeho oktaedrick\u00e9 vakance jsou vypln\u011bny kladn\u011b nabit\u00fdmi ionty kov\u016f, zat\u00edmco z\u00e1porn\u011b nabit\u00e9 ionty kysl\u00edku tyto prostory obsazuj\u00ed, \u010d\u00edm\u017e se m\u011bn\u00ed jeho krystalov\u00e1 struktura a n\u00e1sledn\u011b i jeho vlastnosti.<\/p>\n
Keramika z \u010dist\u00e9ho oxidu hlinit\u00e9ho je ji\u017e dlouho cen\u011bna pro sv\u00e9 elektroizola\u010dn\u00ed schopnosti, tak\u017ee je ide\u00e1ln\u00ed pro aplikace, jako je izolace pec\u00ed. Jejich iontov\u00e9 vlastnosti pom\u00e1haj\u00ed zabr\u00e1nit pr\u016ftoku elekt\u0159iny skrz n\u011b, ani\u017e by ztratily schopnost slou\u017eit jako izolant proti vysok\u00fdm proud\u016fm, ani\u017e by se jakkoli naru\u0161ily.<\/p>\n
Hlin\u00edk je extr\u00e9mn\u011b odoln\u00fd materi\u00e1l, kter\u00fd je schopen odol\u00e1vat opot\u0159eben\u00ed, korozi a \u00fanav\u011b, a proto je vhodn\u00fd pro pou\u017eit\u00ed v r\u016fzn\u00fdch n\u00e1ro\u010dn\u00fdch pr\u016fmyslov\u00fdch a komer\u010dn\u00edch aplikac\u00edch. Vzhledem k tomu, \u017ee je odoln\u00fd proti po\u0161kr\u00e1b\u00e1n\u00ed a \u0159ez\u00e1n\u00ed, je k\u0159emi\u010dit\u00e9 abrazivo \u0161iroce pou\u017e\u00edv\u00e1no jako abrazivo p\u0159i brou\u0161en\u00ed a le\u0161t\u011bn\u00ed, nap\u0159\u00edklad p\u0159i p\u00edskov\u00e1n\u00ed a trysk\u00e1n\u00ed. Krom\u011b toho se v keramick\u00fdch glazur\u00e1ch tak\u00e9 pou\u017e\u00edv\u00e1 k\u0159emi\u010dit\u00e9 brusivo jako p\u0159\u00edsada pro zv\u00fd\u0161en\u00ed tvrdosti a lesku. Sklo m\u016f\u017ee m\u00edt prosp\u011bch z p\u0159id\u00e1n\u00ed oxidu hlinit\u00e9ho do sv\u00e9ho slo\u017een\u00ed, aby se zv\u00fd\u0161ila jeho teplota t\u00e1n\u00ed a sp\u00e9k\u00e1n\u00ed a zlep\u0161ila pevnost v tahu a povrchov\u00e9 nap\u011bt\u00ed. P\u0159\u00eddavek oxidu hlinit\u00e9ho m\u016f\u017ee tak\u00e9 sn\u00ed\u017eit devitrifikaci a z\u00e1rove\u0148 zlep\u0161it lesk, pracovn\u00ed rozsah a odolnost v\u016f\u010di p\u016fsoben\u00ed kyselin. Sklo obsahuje oxid k\u0159emi\u010dit\u00fd (SiO2), kter\u00fd mu dod\u00e1v\u00e1 tv\u00e1rnost a pru\u017enost. Oxid k\u0159emi\u010dit\u00fd m\u016f\u017ee b\u00fdt tak\u00e9 nahrazen SiO2 pro sn\u00ed\u017een\u00ed teploty t\u00e1n\u00ed a zlep\u0161en\u00ed odolnosti proti tepeln\u00fdm \u0161ok\u016fm v n\u011bkter\u00fdch sodnov\u00e1penat\u00fdch formulac\u00edch. Hlin\u00edk je vynikaj\u00edc\u00ed \u017e\u00e1ruvzdorn\u00fd materi\u00e1l pro pou\u017eit\u00ed v petrochemick\u00fdch procesech, jako je autotermick\u00fd reforming uhlovod\u00edk\u016f a v\u00fdroba syntetick\u00e9ho plynu (synplynu). Pou\u017eit\u00ed oxidu hlinit\u00e9ho v petrochemick\u00fdch aplikac\u00edch v\u0161ak vy\u017eaduje pe\u010dliv\u00fd v\u00fdb\u011br surovin, p\u0159\u00edsnou kontrolu b\u011bhem sp\u00e9k\u00e1n\u00ed a pe\u010dlivou pozornost, aby v\u00fdsledn\u00e9 \u017e\u00e1ruvzdorn\u00e9 materi\u00e1ly nereagovaly s molekulami vod\u00edku ne\u017e\u00e1douc\u00edm zp\u016fsobem.<\/p>\n
Oxid hlinit\u00fd (Al2O3) je inertn\u00ed b\u00edl\u00e1 krystalick\u00e1 slou\u010denina bez z\u00e1pachu, kter\u00e1 se pou\u017e\u00edv\u00e1 jako surovina pro v\u00fdrobu kovov\u00e9ho hlin\u00edku a r\u016fzn\u00fdch pokro\u010dil\u00fdch materi\u00e1l\u016f, jako je pr\u016fmyslov\u00e1 keramika. D\u00edky sv\u00fdm vynikaj\u00edc\u00edm mechanick\u00fdm, chemick\u00fdm a tepeln\u00fdm vlastnostem m\u00e1 mnoho aplikac\u00ed prodlu\u017euj\u00edc\u00edch \u017eivot a podporuj\u00edc\u00edch spole\u010dnost v mnoha pr\u016fmyslov\u00fdch odv\u011btv\u00edch a oborech. Hlin\u00edk lze z\u00edskat z bauxitu - miner\u00e1lu bohat\u00e9ho na rudy, kter\u00fd se p\u0159irozen\u011b vyskytuje v p\u0159\u00edrod\u011b a slou\u017e\u00ed jako jeho hlavn\u00ed zdroj.<\/p>\n
Spole\u010dnost Associated Ceramics vyr\u00e1b\u00ed v\u00fdrobky z oxidu hlinit\u00e9ho s velmi vysokou \u010distotou podle p\u0159\u00edsn\u00fdch mezin\u00e1rodn\u00edch norem, nap\u0159\u00edklad podle norem stanoven\u00fdch Americkou konferenc\u00ed vl\u00e1dn\u00edch pr\u016fmyslov\u00fdch hygienik\u016f (ACGIH). Pat\u0159\u00ed sem i t\u0159\u00eddy ultravysok\u00e9 \u010distoty s koncentrac\u00ed sod\u00edku pod 100 ppm hmotnosti - kontaminace sod\u00edkem je velmi \u0161kodliv\u00e1, proto\u017ee m\u00e1 tendenci sp\u00e9kat se v kalcin\u00e1torech, co\u017e vede k ne\u017e\u00e1douc\u00edm vlastnostem v\u00fdrobk\u016f, jako je n\u00edzk\u00e1 tvrdost a n\u00edzk\u00e1 odolnost proti opot\u0159eben\u00ed.<\/p>\n
Oxid hlinit\u00fd je jedn\u00edm z chemicky nejinertn\u011bj\u0161\u00edch keramick\u00fdch materi\u00e1l\u016f, kter\u00fd nab\u00edz\u00ed v\u00fdjime\u010dnou odolnost proti korozi v oxida\u010dn\u00edm i reduk\u010dn\u00edm prost\u0159ed\u00ed. Nav\u00edc je d\u00edky sv\u00e9 odolnosti proti korozi na druh\u00e9m m\u00edst\u011b za karbidem k\u0159em\u00edku (SiC). Rozm\u011brov\u011b stabiln\u00ed s dobr\u00fdmi vlastnostmi tepeln\u00e9 vodivosti, hlin\u00edk tak\u00e9 odol\u00e1v\u00e1 \u00fatok\u016fm alk\u00e1li\u00ed, ale ne tak \u00fa\u010dinn\u011b \u00fatok\u016fm kyselin.<\/p>\n
Chemick\u00e9 slo\u017een\u00ed oxidu hlinit\u00e9ho se li\u0161\u00ed podle druhu, p\u0159i\u010dem\u017e jeho nejobl\u00edben\u011bj\u0161\u00ed formou je a-Al2O3. V t\u00e9to form\u011b vypl\u0148uj\u00ed ionty kysl\u00edku dv\u011b t\u0159etiny oktaedrick\u00fdch mezer, zat\u00edmco ionty hlin\u00edku zauj\u00edmaj\u00ed jednu t\u0159etinu. Hlin\u00edk m\u016f\u017ee existovat tak\u00e9 v r\u016fzn\u00fdch metastabiln\u00edch form\u00e1ch, v\u010detn\u011b kubick\u00fdch f\u00e1z\u00ed g a e, orthorombick\u00e9 f\u00e1ze k a monoklinick\u00fdch f\u00e1z\u00ed th a d.<\/p>\n
Do oxidu hlinit\u00e9ho lze p\u0159id\u00e1vat p\u0159\u00edsady a slo\u017eky, kter\u00e9 upravuj\u00ed jeho specifick\u00e9 vlastnosti, v\u010detn\u011b oxidu ho\u0159e\u010dnat\u00e9ho (MgO), oxidu titani\u010dit\u00e9ho (TiO2), oxidu chromit\u00e9ho (Cr2O3), oxidu k\u0159emi\u010dit\u00e9ho (SiO2) a magn\u00e9zia (MgO). Mangan zvy\u0161uje tvrdost, zat\u00edmco k\u0159em\u00edk zlep\u0161uje chemickou stabilitu. Gallium zvy\u0161uje odolnost oxidu hlinit\u00e9ho proti n\u00e1raz\u016fm a vibrac\u00edm, zat\u00edmco n\u00edzk\u00e9 mno\u017estv\u00ed zirkonia zvy\u0161uje tvrdost i odolnost proti opot\u0159eben\u00ed. Tato t\u011blesa oxidu hlinit\u00e9ho se pak kombinuj\u00ed r\u016fzn\u00fdmi metodami spojov\u00e1n\u00ed a vytv\u00e1\u0159ej\u00ed se z nich vlastn\u00ed t\u0159\u00eddy ur\u010den\u00e9 pro specifick\u00e9 aplikace, jako jsou ot\u011bruvzdorn\u00e9 vlo\u017eky pro oblo\u017een\u00ed \u017elab\u016f nebo v\u00fdpustn\u00fdch otvor\u016f. D\u00edky t\u011bsn\u00fdm rozm\u011brov\u00fdm toleranc\u00edm a vysok\u00e9 tvrdosti je oxid hlinit\u00fd vynikaj\u00edc\u00ed volbou pro sou\u010d\u00e1sti odoln\u00e9 proti opot\u0159eben\u00ed, jako jsou textiln\u00ed vod\u00edtka, p\u00edsty \u010derpadel a z\u00e1pustky, a d\u00edky sv\u00e9 univerz\u00e1lnosti je s oblibou volen tak\u00e9 mezi sou\u010d\u00e1stmi potrub\u00ed, jako jsou kolena, troj\u00faheln\u00edky, redukce a trysky.<\/p>","protected":false},"excerpt":{"rendered":"
Alumina is an extremely tough material used in many industrial applications. As the primary commercial aluminum oxide product, alumina is […]<\/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-73","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\/73","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=73"}],"version-history":[{"count":1,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/posts\/73\/revisions"}],"predecessor-version":[{"id":74,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/posts\/73\/revisions\/74"}],"wp:attachment":[{"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/media?parent=73"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/categories?post=73"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/tags?post=73"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}