Oxid hlinit\u00fd je chemicky inertn\u00fd a odoln\u00fd vo\u010di kor\u00f3zii, tak\u017ee je vhodn\u00fd na izol\u00e1tory zapa\u013eovac\u00edch svie\u010dok a substr\u00e1ty mikro\u010dipov, v\u00fdrobu keramiky a pou\u017eitie v medic\u00edne, napr\u00edklad na zubn\u00e9 implant\u00e1ty.<\/p>\n
V\u00fdroba oxidu hlinit\u00e9ho si vy\u017eaduje ve\u013ek\u00e9 mno\u017estvo tepla a energie, ktor\u00e9 sa z\u00edskavaj\u00fa z bauxitu pomocou Bayerovho procesu. Bauxit sa rozdrv\u00ed, premyje a vysu\u0161\u00ed pred t\u00fdm, ako sa pri vysok\u00fdch teplot\u00e1ch rozpust\u00ed v kaustickej s\u00f3de, a nakoniec sa premiestni do vysok\u00fdch n\u00e1dr\u017e\u00ed zn\u00e1mych ako zr\u00e1\u017eacie n\u00e1dr\u017ee, kde sa filtruje a prefiltruje, k\u00fdm sa op\u00e4\u0165 stane pou\u017eite\u013en\u00fdm.<\/p>\n
Oxid hlinit\u00fd (Al2O3) je inertn\u00fd, biely kry\u0161talick\u00fd miner\u00e1l s tvrdos\u0165ou pod\u013ea Mohsovej stupnice 9. Oxid hlinit\u00fd je zn\u00e1my svojimi v\u00fdnimo\u010dn\u00fdmi chemick\u00fdmi a mechanick\u00fdmi vlastnos\u0165ami a nach\u00e1dza \u0161irok\u00e9 uplatnenie v modern\u00fdch keramick\u00fdch tvaroch a komponentoch pou\u017e\u00edvan\u00fdch v mnoh\u00fdch priemyseln\u00fdch odvetviach - od izol\u00e1torov zapa\u013eovac\u00edch svie\u010dok cez integrovan\u00e9 obvody a kostn\u00e9 implant\u00e1ty a\u017e po br\u00fasne papiere a br\u00fasne kot\u00fa\u010de - a v\u010faka svojej n\u00edzkej elektrickej vodivosti je tie\u017e vhodn\u00fdm kandid\u00e1tom na hermetick\u00e9 elektrick\u00e9 priechody pre elektr\u00e1rne a jadrov\u00e9 reaktory.<\/p>\n
Bauxit je hlavn\u00fdm zdrojom komer\u010dnej v\u00fdroby oxidu hlinit\u00e9ho. Hlin\u00edk sa vyr\u00e1ba v metalurgick\u00fdch aj keramick\u00fdch variantoch; jeden typ predstavuje pr\u00e1\u0161kov\u00fd bauxit ur\u010den\u00fd na tavenie hlin\u00edka, zatia\u013e \u010do keramick\u00e9 variety maj\u00fa \u0161ir\u0161ie vyu\u017eitie, napr\u00edklad na jemn\u00e9 mletie na r\u00f4zne \u00fa\u010dely. Obe odrody oxidu hlinit\u00e9ho sa vyr\u00e1baj\u00fa r\u00f4znymi technikami, ale najroz\u0161\u00edrenej\u0161\u00edm procesom zost\u00e1va kalcin\u00e1cia; pri nej sa oxid hlinit\u00fd men\u00ed na keramiku, ktor\u00e1 m\u00e1 mnoho spolo\u010dn\u00fdch vlastnost\u00ed s be\u017enou keramikou.<\/p>\n
Tento proces sa pou\u017e\u00edva aj na v\u00fdrobu \u017eiaruvzdorn\u00e9ho oxidu hlinit\u00e9ho, ktor\u00fd je z\u00e1kladn\u00fdm prvkom hermetick\u00fdch priechodiek pou\u017e\u00edvan\u00fdch v elektr\u00e1r\u0148ach a jadrov\u00fdch reaktoroch. V\u010faka svojej vysokej pevnosti a extr\u00e9mnej tvrdosti je \u017eiaruvzdorn\u00fd oxid hlinit\u00fd vynikaj\u00facim materi\u00e1lom na oblo\u017eenie kovov\u00fdch kontajnerov s cie\u013eom zabr\u00e1ni\u0165 \u00fanikom a z\u00e1rove\u0148 zn\u00ed\u017ei\u0165 n\u00e1klady na \u00fadr\u017ebu.<\/p>\n
Hlin\u00edk nie je len neocenite\u013en\u00fdm priemyseln\u00fdm miner\u00e1lom, ale aj n\u00e1dhern\u00fdm drahokamom zn\u00e1mym ako zaf\u00edr a rub\u00edn. Kry\u0161talick\u00e1 forma zn\u00e1ma ako korund d\u00e1va rub\u00ednom a zaf\u00edrom ich klasick\u00e9 farby, zatia\u013e \u010do oxidy \u017eeleza a tit\u00e1nu im dod\u00e1vaj\u00fa r\u00f4zne odtiene.<\/p>\n
Tak ako in\u00e9 miner\u00e1ly, aj oxid hlinit\u00fd sa sklad\u00e1 zo siln\u00fdch i\u00f3novo-kovalentn\u00fdch chemick\u00fdch v\u00e4zieb a ned\u00e1 sa oh\u00fdba\u0165 ani stl\u00e1\u010da\u0165 ako kovy a zliatiny. Preto sa zlo\u017eit\u00e9 tvary nedaj\u00fa odlieva\u0165 kovan\u00edm, ale musia sa obr\u00e1ba\u0165 pomocou \u0161tandardn\u00fdch n\u00e1strojov a br\u00fasnych materi\u00e1lov na presn\u00e9 rozmery pre presn\u00e9 rozmery pomocou \u0161tandardn\u00fdch n\u00e1strojov a br\u00fasnych materi\u00e1lov. Hlin\u00edk napriek t\u00fdmto obmedzeniam vykazuje miernu odolnos\u0165 proti \u0165ahu a ohybu, ako aj krehk\u00e9 lomov\u00e9 spr\u00e1vanie podobn\u00e9 mnoh\u00fdm polykry\u0161talick\u00fdm keramik\u00e1m; napriek tomu v\u0161ak st\u00e1le pon\u00faka mno\u017estvo v\u00fdhod oproti kovom a zliatin\u00e1m v \u00falohe keramick\u00e9ho materi\u00e1lu; vysoko \u00fa\u010dinn\u00e9 izola\u010dn\u00e9 vlastnosti robia z tohto materi\u00e1lu vynikaj\u00facu n\u00e1hradu skla v mnoh\u00fdch aplik\u00e1ci\u00e1ch, zatia\u013e \u010do obmedzenia teploty topenia obmedzuj\u00fa jeho pou\u017eitie vo vysokoteplotn\u00fdch aplik\u00e1ci\u00e1ch.<\/p>\n
Hlin\u00edk (Al2O3) je prirodzene sa vyskytuj\u00faca biela, inertn\u00e1 zl\u00fa\u010denina bez z\u00e1pachu, ktor\u00e1 sa nach\u00e1dza v r\u00f4znych miner\u00e1loch, ako je korund a bauxit - dva z\u00e1kladn\u00e9 zdroje hlin\u00edkovej rudy. V\u010faka svojim vynikaj\u00facim chemick\u00fdm, tepeln\u00fdm a mechanick\u00fdm vlastnostiam na\u0161iel v spolo\u010dnosti mnoho vyu\u017eit\u00ed a aplik\u00e1ci\u00ed na pred\u013a\u017eenie \u017eivotnosti.<\/p>\n
\u010cist\u00fd oxid hlinit\u00fd je tvrd\u00fd, krehk\u00fd miner\u00e1l so sklovit\u00fdm povrchom, ktor\u00fd sa pou\u017e\u00edva ako br\u00fasivo do br\u00fasnych kot\u00fa\u010dov a br\u00fasnych papierov, ako aj ako priemyseln\u00e1 n\u00e1hrada diamantu. Hlin\u00edk je tie\u017e d\u00f4le\u017eitou zlo\u017ekou mnoh\u00fdch \u017eiaruvzdorn\u00fdch materi\u00e1lov a keramiky, ako s\u00fa izol\u00e1tory z\u00e1\u017eihov\u00fdch svie\u010dok v modern\u00fdch vozidl\u00e1ch; na zv\u00fd\u0161enie h\u00fa\u017eevnatosti m\u00f4\u017ee obsahova\u0165 \u010dastice zirk\u00f3nu alebo metli\u010dky karbidu krem\u00edka, ktor\u00e9 s\u00fa vhodn\u00e9 na rezn\u00e9 n\u00e1stroje; okrem toho sa m\u00f4\u017ee sta\u0165 priesvitn\u00fdm pridan\u00edm magn\u00e9zia.<\/p>\n
Hlin\u00edk sa vyr\u00e1ba z hlin\u00edkovej rudy bauxitu chemick\u00fdm procesom zn\u00e1mym ako rafin\u00e1cia oxidu hlinit\u00e9ho, pri\u010dom komer\u010dn\u00e9 z\u00e1vody boli prv\u00fdkr\u00e1t uveden\u00e9 do prev\u00e1dzky v 60. rokoch 20. storo\u010dia. Po rafin\u00e1cii sa prepravuje do hlinik\u00e1rn\u00ed, kde sa elektrolyzuje na kovov\u00fd hlin\u00edk; potom sa melie na jemn\u00fd pr\u00e1\u0161ok na pou\u017eitie vo v\u00fdrobkoch, ako s\u00fa \u017eiaruvzdorn\u00e9 materi\u00e1ly a keramika.<\/p>\n
Bauxit obsahuje 30-55 % Al2O3. Na z\u00edskanie oxidu hlinit\u00e9ho sa rozdrven\u00fd a premyt\u00fd bauxit zmie\u0161a so s\u00f3dou kaustickou a vytvor\u00ed sa ka\u0161a. Po filtr\u00e1cii a pre\u010derpan\u00ed do zr\u00e1\u017eac\u00edch n\u00e1dr\u017e\u00ed na \u010fal\u0161ie spracovanie vznik\u00e1 pevn\u00fd hydroxid hlinit\u00fd, ktor\u00fd je z\u00e1kladom priemyslu.<\/p>\n
\u010cerven\u00e9 bahno, zvy\u0161ok po \u0165a\u017ebe rudy, obsahuje ne\u010distoty, ako s\u00fa oxidy \u017eeleza, kremi\u010ditany a kreme\u0148, ktor\u00e9 zne\u010dis\u0165uj\u00fa \u017eivotn\u00e9 prostredie, vr\u00e1tane vysokej koncentr\u00e1cie ortuti a in\u00fdch kovov, \u010do s\u0165a\u017euje jeho likvid\u00e1ciu - pri nehode v ma\u010farskom z\u00e1vode na v\u00fdrobu oxidu hlinit\u00e9ho v roku 2010 sa jedna stena zr\u00fatila do pri\u013eahl\u00e9ho rybn\u00edka s \u010derven\u00fdm bahnom, pri\u010dom sa toxick\u00fd odpad uvo\u013enil priamo do bl\u00edzkej rieky.<\/p>\n
Predaj oxidu hlinit\u00e9ho zaznamenal r\u00fdchly rast, preto\u017ee \u010doraz viac v\u00fdrobcov po\u017eaduje jeho vy\u0161\u0161iu \u010distotu na pou\u017eitie pri v\u00fdrobe hlin\u00edka. V s\u00fa\u010dasnosti sa na celom svete ro\u010dne pou\u017eije viac ako 50 mili\u00f3nov ton oxidu hlinit\u00e9ho ako prim\u00e1rneho materi\u00e1lu na v\u00fdrobu hlin\u00edka; s prechodom na n\u00edzkouhl\u00edkov\u00fa bud\u00facnos\u0165 by mal oxid hlinit\u00fd zosta\u0165 d\u00f4le\u017eit\u00fdm hr\u00e1\u010dom.<\/p>\n
Oxid hlinit\u00fd je keramick\u00fd materi\u00e1l, ktor\u00fd je zn\u00e1my svojou tvrdos\u0165ou, tepelnou odolnos\u0165ou a bioinertnos\u0165ou. V\u010faka svojej vysokej pevnosti, pru\u017enosti, n\u00edzkej miere oderu, odolnosti proti kor\u00f3zii a n\u00e1razu je oxid hlinit\u00fd vynikaj\u00facim mlec\u00edm m\u00e9diom v gu\u013eov\u00fdch a mie\u0161an\u00fdch mlynoch, pri\u010dom je teplotne stabiln\u00fd po\u010das dlh\u00e9ho \u010dasov\u00e9ho obdobia, \u010do ho rob\u00ed dostato\u010dne univerz\u00e1lnym na pou\u017eitie v celom rade priemyseln\u00fdch aplik\u00e1ci\u00ed.<\/p>\n
Hlin\u00edk sa vyr\u00e1ba synteticky z bauxitovej rudy, ktor\u00e1 obsahuje r\u00f4zne mno\u017estv\u00e1 vodnat\u00fdch oxidov hlin\u00edka. Hlin\u00edk m\u00e1 mnoho d\u00f4le\u017eit\u00fdch priemyseln\u00fdch vyu\u017eit\u00ed; napr\u00edklad modern\u00e1 v\u00fdroba keramiky sa vo ve\u013ekej miere spolieha na jeho pou\u017eitie; tie\u017e zohr\u00e1va neoddelite\u013en\u00fa \u00falohu pri taven\u00ed kovov\u00e9ho hlin\u00edka a v\u00fdrobe r\u00f4znych chemick\u00fdch produktov; okrem toho sa m\u00f4\u017ee pochv\u00e1li\u0165 vynikaj\u00facimi vlastnos\u0165ami elektrick\u00e9ho izolantu pri izbov\u00fdch teplot\u00e1ch aj pri zv\u00fd\u0161en\u00fdch teplot\u00e1ch - v\u010faka tomu je oxid hlinit\u00fd d\u00f4le\u017eit\u00fdm \u017eiaruvzdorn\u00fdm materi\u00e1lom, ktor\u00fd nevy\u017eaduje \u017eiadne extern\u00e9 spojiv\u00e1 na dosiahnutie izola\u010dn\u00fdch vlastnost\u00ed.<\/p>\n
Fyzik\u00e1lne vlastnosti Hlin\u00edk sa z h\u013eadiska tvrdosti rad\u00ed na Mohsovej stupnici tvrdosti na druh\u00e9 miesto za diamant. M\u00f4\u017ee sa pochv\u00e1li\u0165 extr\u00e9mne vysok\u00fdm bodom topenia, ako aj odolnos\u0165ou vo\u010di intenz\u00edvnemu teplu, chladu, oderu, pevnos\u0165ou v tlaku a\u017e do 250 000 PSI a n\u00edzkymi tlakmi pary a rozkladu.<\/p>\n
\u010cist\u00fd oxid hlinit\u00fd m\u00e1 vynikaj\u00facu chemick\u00fa stabilitu, odol\u00e1va kor\u00f3zii v\u00e4\u010d\u0161inou roztokov kysel\u00edn a z\u00e1sad. M\u00f4\u017ee v\u0161ak by\u0165 mierne rozpustn\u00fd v roztokoch kyseliny s\u00edrovej (hor\u00facej), kyseliny chlorovod\u00edkovej a kyseliny dusi\u010dnej; napriek tomu zost\u00e1va ide\u00e1lnou vo\u013ebou materi\u00e1lu pre mnoh\u00e9 technick\u00e9 aplik\u00e1cie v\u010faka svojej vynikaj\u00facej chemickej stabilite.<\/p>\n
Hlin\u00edkov\u00e1 keramika m\u00e1 \u0161irok\u00e9 uplatnenie v letectve, ropnom priemysle, elektroenergetike, automobilovom priemysle, elektronike a fotovoltaick\u00fdch syst\u00e9moch sol\u00e1rnej energie, ako aj vo fotovoltaick\u00fdch bat\u00e9ri\u00e1ch na uskladnenie sol\u00e1rnej energie a bat\u00e9ri\u00e1ch pre nov\u00e9 energie. Hlin\u00edkov\u00e1 keramika vynik\u00e1 pri pou\u017eit\u00ed v n\u00e1ro\u010dn\u00fdch situ\u00e1ci\u00e1ch, ktor\u00e9 si vy\u017eaduj\u00fa vysok\u00fa teplotn\u00fa stabilitu s vynikaj\u00facimi elektrick\u00fdmi izola\u010dn\u00fdmi vlastnos\u0165ami.<\/p>\n
Medic\u00ednsky oxid hlinit\u00fd (MA) je forma oxidu hlinit\u00e9ho, ktor\u00e1 bola spracovan\u00e1 s cie\u013eom zlep\u0161i\u0165 jej mechanick\u00e9 vlastnosti. Vykonan\u00e9 \u0161t\u00fadie preuk\u00e1zali ni\u017e\u0161iu mieru zlyhania po\u010das klinick\u00fdch sk\u00fa\u0161ok ako u oxidu hlinit\u00e9ho tretej gener\u00e1cie, v\u010faka \u010domu je MA vynikaj\u00facou vo\u013ebou pre zubn\u00e9 implant\u00e1ty, umel\u00e9 k\u013aby a kostn\u00e9 n\u00e1hrady, ako aj ochrann\u00e9 zariadenia, ako s\u00fa prilby a nepriestreln\u00e9 okn\u00e1, a to v\u010faka svojej biologickej inertnosti, ktor\u00e1 ho rob\u00ed bezpe\u010dn\u00fdm pre pou\u017eitie v \u013eudskom tele.<\/p>\n
Oxid hlinit\u00fd je tvrd\u00fd a ve\u013emi odoln\u00fd materi\u00e1l s mnoh\u00fdmi priemyseln\u00fdmi vyu\u017eitiami. Be\u017ene sa pou\u017e\u00edva ako abraz\u00edvum na ochranu in\u00fdch materi\u00e1lov pred opotrebovan\u00edm, ako aj pri v\u00fdrobe \u017eiaruvzdorn\u00fdch v\u00fdrobkov. Oxid hlinit\u00fd vznik\u00e1 procesom kalcin\u00e1cie hydroxidu hlinit\u00e9ho pri vysok\u00fdch teplot\u00e1ch za vzniku oxidu hlinit\u00e9ho, ktor\u00fd je zn\u00e1my ako spekanie. Samotn\u00fd oxid hlinit\u00fd m\u00e1 bielu farbu s inertn\u00fdmi vlastnos\u0165ami bez z\u00e1pachu, \u010do z neho rob\u00ed vynikaj\u00facu vo\u013ebu materi\u00e1lu pre n\u00e1ro\u010dn\u00e9 priemyseln\u00e9 aplik\u00e1cie, ako je napr\u00edklad zv\u00e1ranie.<\/p>\n
\u017diaruvzdorn\u00e9 materi\u00e1ly zlo\u017een\u00e9 z oxidu hlinit\u00e9ho sa \u010dasto vyzna\u010duj\u00fa schopnos\u0165ou odol\u00e1va\u0165 extr\u00e9mne vysok\u00fdm teplot\u00e1m bez straty rozmerovej stability, zachov\u00e1va\u0165 teplo a odol\u00e1va\u0165 zne\u010disteniu koroz\u00edvnymi l\u00e1tkami - vlastnosti, v\u010faka ktor\u00fdm s\u00fa tieto \u017eiaruvzdorn\u00e9 materi\u00e1ly vhodn\u00e9 na odlievanie aj obr\u00e1banie. Pred pou\u017eit\u00edm by sa v\u0161ak mali tieto materi\u00e1ly otestova\u0165 z h\u013eadiska chemick\u00fdch, mechanick\u00fdch a fyzik\u00e1lnych vlastnost\u00ed.<\/p>\n
\u017diaruvzdorn\u00e9 materi\u00e1ly mo\u017eno rozdeli\u0165 do troch \u0161irok\u00fdch kateg\u00f3ri\u00ed na z\u00e1klade ich mineralogick\u00e9ho zlo\u017eenia, ako s\u00fa miner\u00e1lno-krem\u00edkov\u00e9 \u017eiaruvzdorn\u00e9 materi\u00e1ly, ktor\u00e9 obsahuj\u00fa oxid kremi\u010dit\u00fd a oxid hlinit\u00fd, ktor\u00e9 s\u00fa chemicky inertn\u00e9 a z\u00e1rove\u0148 odol\u00e1vaj\u00fa kor\u00f3zii pri vysok\u00fdch teplot\u00e1ch; okrem toho ich mo\u017eno rozdeli\u0165 aj pod\u013ea toho, ako reaguj\u00fa s kysl\u00fdmi a z\u00e1sadit\u00fdmi roztokmi, alebo pod\u013ea ich odolnosti vo\u010di kor\u00f3zii pri vysok\u00fdch teplot\u00e1ch. Pr\u00edkladom m\u00f4\u017ee by\u0165 oxid kremi\u010dit\u00fd, ktor\u00fd obsahuje tieto materi\u00e1ly, ktor\u00e9 s\u00fa chemicky odoln\u00e9 vo\u010di kor\u00f3zii hlin\u00edka; tieto typy \u017eiaruvzdorn\u00fdch materi\u00e1lov sa \u0161iroko pou\u017e\u00edvaj\u00fa pri v\u00fdrobe ocele a v peciach.<\/p>\n
Ostatn\u00e9 \u017eiaruvzdorn\u00e9 materi\u00e1ly mo\u017eno rozl\u00ed\u0161i\u0165 pod\u013ea ich zlo\u017eenia a \u0161trukt\u00fary, pri\u010dom existuje nieko\u013eko skup\u00edn pod\u013ea toho, ko\u013eko oxidu kremi\u010dit\u00e9ho a oxidu hlinit\u00e9ho obsahuj\u00fa. Kaol\u00ednov\u00e9 \u00edly poskytuj\u00fa n\u00edzku cenu a z\u00e1rove\u0148 vynikaj\u00facu \u017eiaruvzdornos\u0165; tieto \u017eiaruvzdorn\u00e9 materi\u00e1ly sa uk\u00e1zali ako odoln\u00e9 vo\u010di er\u00f3zii v ur\u010dit\u00fdch prostrediach, ale \u010dasom sa m\u00f4\u017eu sta\u0165 n\u00e1chyln\u00fdmi.<\/p>\n
\u017diaruvzdorn\u00e9 materi\u00e1ly zlo\u017een\u00e9 z magn\u00e9zia s\u00fa z\u00e1sadit\u00e9 materi\u00e1ly, \u010do znamen\u00e1, \u017ee nereaguj\u00fa s kyselinami; materi\u00e1ly vyroben\u00e9 z chr\u00f3mu a hor\u010d\u00edka odol\u00e1vaj\u00fa vysok\u00fdm teplot\u00e1m bez toho, aby pod\u013eahli ich \u00fa\u010dinkom; in\u00e9, ako napr\u00edklad zirk\u00f3n, dokonca \u013eahko zn\u00e1\u0161aj\u00fa podmienky tavenia skla. Bez oh\u013eadu na to, ak\u00fd \u017eiaruvzdorn\u00fd materi\u00e1l sa vyberie na pou\u017eitie, je nevyhnutn\u00e9 d\u00f4kladne otestova\u0165 jeho suroviny na zdanliv\u00fa hustotu, mieru absorpcie vody a vlastnosti otvorenej p\u00f3rovitosti, ako aj na anal\u00fdzu pevnosti v trojbodovom ohybe a pevnosti v tlaku.<\/p>","protected":false},"excerpt":{"rendered":"
Alumina is chemically inert and resistant to corrosion, making it suitable for spark plug insulators and microchip substrates, ceramics production […]<\/p>","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":[3],"tags":[],"class_list":["post-349","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/artehistoria.net\/sk\/wp-json\/wp\/v2\/posts\/349","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/artehistoria.net\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/artehistoria.net\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/artehistoria.net\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/artehistoria.net\/sk\/wp-json\/wp\/v2\/comments?post=349"}],"version-history":[{"count":1,"href":"https:\/\/artehistoria.net\/sk\/wp-json\/wp\/v2\/posts\/349\/revisions"}],"predecessor-version":[{"id":350,"href":"https:\/\/artehistoria.net\/sk\/wp-json\/wp\/v2\/posts\/349\/revisions\/350"}],"wp:attachment":[{"href":"https:\/\/artehistoria.net\/sk\/wp-json\/wp\/v2\/media?parent=349"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/artehistoria.net\/sk\/wp-json\/wp\/v2\/categories?post=349"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/artehistoria.net\/sk\/wp-json\/wp\/v2\/tags?post=349"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}