Oxid hlinit\u00fd je biela kry\u0161talick\u00e1 pevn\u00e1 l\u00e1tka, ktor\u00fa mo\u017eno formova\u0165 do r\u00f4znych tvarov. Okrem toho, \u017ee je h\u00fa\u017eevnat\u00fd a tvrd\u00fd, v\u010faka \u010domu je vhodn\u00fd ako \u017eiaruvzdorn\u00fd materi\u00e1l, jeho h\u00fa\u017eevnatos\u0165 mo\u017eno zv\u00fd\u0161i\u0165 pridan\u00edm \u010dast\u00edc zirk\u00f3nu - to umo\u017e\u0148uje efekt\u00edvnej\u0161iu pr\u00e1cu priemyseln\u00fdch rezn\u00fdch n\u00e1strojov.<\/p>\n
V\u00fdroba oxidu hlinit\u00e9ho, ktor\u00fd sa vyr\u00e1ba Bayerov\u00fdm procesom z bauxitovej rudy, predstavuje probl\u00e9m pre \u017eivotn\u00e9 prostredie (ako pr\u00edklad si pozrite \u010derven\u00e9 kalov\u00e9 jazierko Stade na map\u00e1ch Google).<\/p>\n
Hlin\u00edk s chemick\u00fdm vzorcom Al2O3 je biela kry\u0161talick\u00e1 pevn\u00e1 l\u00e1tka s molekulov\u00fdm vzorcom Al2O3. Hlin\u00edk sa m\u00f4\u017ee z\u00edskava\u0165 z pr\u00edrodn\u00fdch zdrojov ako korund alebo in\u00e9 polymorfn\u00e9 formy; m\u00f4\u017ee sa vyr\u00e1ba\u0165 aj synteticky. Hlin\u00edk m\u00e1 vynikaj\u00face tepeln\u00e9 a elektrick\u00e9 vlastnosti; m\u00e1 extr\u00e9mnu tvrdos\u0165; sl\u00fa\u017ei ako \u00fa\u010dinn\u00fd spoma\u013eova\u010d horenia, preto\u017ee je schopn\u00fd pomaly absorbova\u0165 a odv\u00e1dza\u0165 teplo; m\u00e1 vynikaj\u00facu odolnos\u0165 proti kor\u00f3zii a \u017eiareniu; napokon sa m\u00f4\u017ee pochv\u00e1li\u0165 vysok\u00fdm bodom topenia, v\u010faka \u010domu je vhodn\u00fd na pou\u017eitie pri vymurovan\u00ed pec\u00ed alebo kon\u0161trukci\u00ed s vysok\u00fdm bodom topenia, ako s\u00fa oce\u013eov\u00e9 kon\u0161trukcie a stavby.<\/p>\n
Nat\u00edvny bauxit je hlavn\u00fdm zdrojom \u010dist\u00e9ho oxidu hlinit\u00e9ho, ktor\u00fd obsahuje r\u00f4zne mno\u017estv\u00e1 hydroxidov hlin\u00edka obsahuj\u00facich vodu. Bauxit sa m\u00f4\u017ee rafinova\u0165 do formy pr\u00e1\u0161ku na pou\u017eitie ako v\u00fdchodiskov\u00fd materi\u00e1l na tavenie hlin\u00edkov\u00fdch kovov, ako aj ako surovina v priemyselnej keramike a chemickom priemysle. Vo\u013en\u00fd oxid hlinit\u00fd sa v pr\u00edrode vyskytuje aj ako drahokam korund a jeho n\u00e1protivky zaf\u00edr a rub\u00edn, ktor\u00e9 z\u00edskavaj\u00fa svoje charakteristick\u00e9 sfarbenie zo stopov\u00fdch prvkov, ako s\u00fa pr\u00edtomn\u00e9 stopy chr\u00f3mu a \u017eeleza.<\/p>\n
Kalcinovan\u00fd oxid hlinit\u00fd mo\u017eno n\u00e1js\u0165 v mnoh\u00fdch aplik\u00e1ci\u00e1ch, od izol\u00e1torov zapa\u013eovac\u00edch svie\u010dok a obalov integrovan\u00fdch obvodov, laborat\u00f3rneho riadu, br\u00fasnych zrniek pre br\u00fasny papier a dokonca laborat\u00f3rneho riadu pou\u017e\u00edvan\u00e9ho na v\u00fdrobu izol\u00e1torov zapa\u013eovac\u00edch svie\u010dok, laborat\u00f3rneho riadu so zabudovan\u00fdmi izol\u00e1tormi zapa\u013eovac\u00edch svie\u010dok a dokonca laborat\u00f3rneho riadu so zabudovan\u00fdmi izol\u00e1tormi zapa\u013eovac\u00edch svie\u010dok, laborat\u00f3rneho riadu s funkciami laborat\u00f3rneho riadu a dokonca laborat\u00f3rneho riadu so zabudovan\u00fdmi izol\u00e1tormi zapa\u013eovac\u00edch svie\u010dok, ako aj laborat\u00f3rneho riadu so zabudovan\u00fdmi izol\u00e1tormi zapa\u013eovac\u00edch svie\u010dok. Okrem toho sa \u017eiaruvzdorn\u00e9 v\u00fdmurovky pre priemyseln\u00e9 pece vyr\u00e1baj\u00fa zo \u017eiaruvzdorn\u00fdch materi\u00e1lov vyroben\u00fdch zo \u017eiaruvzdornej keramiky, ktor\u00e9 maj\u00fa vynikaj\u00facu mechanick\u00fa pevnos\u0165, ako aj chemick\u00fa odolnos\u0165 vo\u010di kyseline fluorovod\u00edkovej, ako aj vo\u010di roztaven\u00fdm alk\u00e1li\u00e1m\/par\u00e1m alk\u00e1li\u00ed at\u010f.<\/p>\n
Vdychovanie oxidu hlinit\u00e9ho sa vo v\u0161eobecnosti nepova\u017euje za \u0161kodliv\u00e9, hoci u niektor\u00fdch os\u00f4b m\u00f4\u017ee sp\u00f4sobi\u0165 podr\u00e1\u017edenie. \u0160t\u00fadie preuk\u00e1zali, \u017ee r\u00e1dioakt\u00edvne ozna\u010den\u00fd oxid hlinit\u00fd sa po vd\u00fdchnut\u00ed r\u00fdchlo vyl\u00fa\u010di z p\u013e\u00fac; pribli\u017ene 45-50% sa vyd\u00fdchne v priebehu jedn\u00e9ho d\u0148a a vyl\u00fa\u010di mo\u010dom; preto Americk\u00e1 konferencia vl\u00e1dnych priemyseln\u00fdch hygienikov odpor\u00fa\u010da maxim\u00e1lnu hodnotu profesion\u00e1lnej expoz\u00edcie 0,01 g\/m3 po\u010das 72 hod\u00edn.<\/p>\n
Oxid hlinit\u00fd, biela kry\u0161talick\u00e1 forma oxidu hlinit\u00e9ho, sa \u0161iroko pou\u017e\u00edva ako \u017eiaruvzdorn\u00fd materi\u00e1l pre aplik\u00e1cie vy\u017eaduj\u00face vysok\u00e9 teploty a n\u00edzku tepeln\u00fa vodivos\u0165. Medzi mnoh\u00e9 v\u00fdhody oxidu hlinit\u00e9ho patr\u00ed jeho trvanlivos\u0165, pevnos\u0165, odolnos\u0165 proti kor\u00f3zii a izola\u010dn\u00e9 vlastnosti, ktor\u00e9 mu umo\u017e\u0148uj\u00fa uchov\u00e1va\u0165 teplo v kon\u0161trukci\u00e1ch alebo n\u00e1dob\u00e1ch a chr\u00e1ni\u0165 in\u00e9 materi\u00e1ly; okrem toho m\u00e1 ochranu proti chemick\u00fdm \u00fatokom a odolnos\u0165 proti oderu, \u010do z neho rob\u00ed vynikaj\u00facu vo\u013ebu \u017eiaruvzdorn\u00e9ho materi\u00e1lu.<\/p>\n
\u017diaromateri\u00e1ly z oxidu hlinit\u00e9ho sa vyr\u00e1baj\u00fa z hrubo rozdrven\u00e9ho kameniva spojen\u00e9ho \u0161peci\u00e1lnym \u017eiaruvzdorn\u00fdm \u00edlov\u00fdm spojivom alebo roztaven\u00fdmi kovov\u00fdmi silik\u00e1tmi. Existuj\u00fa r\u00f4zne triedy t\u00fdchto \u017eiaruvzdorn\u00fdch materi\u00e1lov v z\u00e1vislosti od ich pou\u017eitia; 85-percentn\u00e9 \u017eiaruvzdorn\u00e9 materi\u00e1ly s obsahom oxidu hlinit\u00e9ho Al2O3 sa \u010dasto nach\u00e1dzaj\u00fa v peciach na tavenie hlin\u00edka, zatia\u013e \u010do 55 % Al2O3 \u017eiaruvzdorn\u00e9 materi\u00e1ly poskytuj\u00fa vynikaj\u00facu odolnos\u0165 vo\u010di er\u00f3zii oce\u013eov\u00fdch dopravn\u00fdch n\u00e1dob prepravuj\u00facich tekut\u00fa oce\u013e.<\/p>\n
Pri v\u00fdrobe \u017eiaruvzdorn\u00fdch materi\u00e1lov t\u00fdmto procesom sa zvy\u010dajne pou\u017e\u00edva met\u00f3da riedenia bauxitu, pri ktorej sa 88-percentn\u00fd bauxit kombinuje s kalcinovan\u00fdm \u0161amotom a surov\u00fdm \u00edlom, aby sa dosiahol potrebn\u00fd obsah Al2O3 na v\u00fdrobu \u017eiaruvzdorn\u00fdch materi\u00e1lov s ni\u017e\u0161\u00edm bodom topenia pri ni\u017e\u0161\u00edch n\u00e1kladoch, ako ke\u010f sa vyr\u00e1ba len z \u010dist\u00e9ho bauxitov\u00e9ho kalu. T\u00fdmto sp\u00f4sobom sa s\u00edce m\u00f4\u017eu z\u00edska\u0165 v\u00fdrobky s ni\u017e\u0161ou teplotou tavenia pri ni\u017e\u0161\u00edch n\u00e1kladoch, m\u00f4\u017ee to v\u0161ak ma\u0165 ur\u010dit\u00e9 nev\u00fdhody vr\u00e1tane toxick\u00fdch emisi\u00ed do \u017eivotn\u00e9ho prostredia z v\u00fdrobn\u00fdch procesov, ktor\u00e9 ved\u00fa k uvo\u013e\u0148ovaniu obrovsk\u00e9ho mno\u017estva \u010derven\u00e9ho kalu.<\/p>\n
\u017diaruvzdorn\u00e9 materi\u00e1ly vyroben\u00e9 z oxidu hlinit\u00e9ho s\u00fa vo v\u0161eobecnosti vhodn\u00e9 na r\u00f4zne aplik\u00e1cie v\u010faka svojej pevnosti, \u017eiaruvzdornosti a odolnosti vo\u010di kor\u00f3zii; s\u00fa to ve\u013emi hust\u00e9 materi\u00e1ly schopn\u00e9 odol\u00e1va\u0165 vysok\u00fdm teplot\u00e1m bez straty \u0161truktur\u00e1lnej integrity; t\u00e1to kombin\u00e1cia ich rob\u00ed vhodn\u00fdmi pre mnoho r\u00f4znych situ\u00e1ci\u00ed.<\/p>\n
Kvalita \u017eiaruvzdornosti oxidu hlinit\u00e9ho sa m\u00f4\u017ee hodnoti\u0165 pomocou sk\u00fa\u0161ok cyklick\u00fdm tepeln\u00fdm \u0161okom, pri ktor\u00fdch sa vzorka pred vyhodnoten\u00edm pevnosti v ohybe, schopnosti trojbodov\u00e9ho ohybu a pevnosti v tlaku zahreje na 950 \u00b0C a r\u00fdchlo sa ochlad\u00ed.<\/p>\n
\u017diaruvzdorn\u00fd oxid hlinit\u00fd sa m\u00f4\u017ee \u010falej zu\u0161\u013eachti\u0165 pridan\u00edm \u010dast\u00edc zirk\u00f3nu alebo karbidu krem\u00edka, alebo m\u00f4\u017ee by\u0165 priesvitn\u00fd pridan\u00edm magn\u00e9zia. Tak\u00e9to pr\u00eddavky zvy\u0161uj\u00fa jeho h\u00fa\u017eevnatos\u0165, ako aj odolnos\u0165 vo\u010di chemik\u00e1li\u00e1m, abr\u00e1zii a kor\u00f3zii.<\/p>\n
Oxid hlinit\u00fd je keramick\u00fd materi\u00e1l s vysok\u00fdm bodom tavenia a v\u00fdnimo\u010dn\u00fdmi tepeln\u00fdmi a mechanick\u00fdmi vlastnos\u0165ami, v\u010faka \u010domu je vhodn\u00fd na \u017eiaruvzdorn\u00e9 a br\u00fasne aplik\u00e1cie. Okrem toho je oxid hlinit\u00fd v\u010faka svojej vynikaj\u00facej odolnosti proti oderu a kor\u00f3zii vynikaj\u00facou vo\u013ebou materi\u00e1lu vo v\u00fdrobkoch zdravotn\u00edckej elektroniky.<\/p>\n
Lisovanie, vytl\u00e1\u010danie, peletiz\u00e1cia a lisovanie sa m\u00f4\u017eu pou\u017ei\u0165 na formovanie r\u00f4znych tvarov z kalcinovan\u00e9ho pr\u00e1\u0161kov\u00e9ho oxidu hlinit\u00e9ho. Reformuje sa pomocou \u0161achtov\u00fdch pec\u00ed a zariaden\u00ed na lisovanie za tepla alebo jednoosov\u00fdm stl\u00e1\u010dan\u00edm; podobn\u00e9 met\u00f3dy sa pou\u017e\u00edvaj\u00fa aj pri v\u00fdrobe \u017eiaruvzdorn\u00fdch teh\u00e1l; nakoniec sa potom na \u00fa\u010dely hustoty pou\u017e\u00edva spekanie; to zah\u0155\u0148a procesy preskupovania \u010dast\u00edc, rastu z\u0155n a odstra\u0148ovania p\u00f3rov, ktor\u00e9 prebiehaj\u00fa po\u010das tohto procesu.<\/p>\n
Hlin\u00edk je mimoriadne pru\u017en\u00fd materi\u00e1l, ktor\u00fd sa \u013eahko formuje pomocou r\u00f4znych techn\u00edk lepenia a konsolid\u00e1cie. To umo\u017e\u0148uje jeho tvarovanie do presn\u00fdch takmer sie\u0165ov\u00fdch tvarov r\u00f4znych ve\u013ekost\u00ed a \u010dist\u00f4t. Okrem toho sa do oxidu hlinit\u00e9ho m\u00f4\u017eu integrova\u0165 pr\u00edsady a \u010fal\u0161ie zlo\u017eky na zlep\u0161enie jeho vlastnost\u00ed v \u0161pecifick\u00fdch aplik\u00e1ci\u00e1ch - napr\u00edklad oxid mangani\u010dit\u00fd zvy\u0161uje tvrdos\u0165, zatia\u013e \u010do oxid kremi\u010dit\u00fd (SiO2) zlep\u0161uje odolnos\u0165 proti tepeln\u00fdm \u0161okom a oxid zirk\u00f3nia (ZrO2) poskytuje odolnos\u0165 proti kor\u00f3zii, ako aj zvy\u0161uje odolnos\u0165 proti opotrebovaniu.<\/p>\n
Hlin\u00edkov\u00e1 keramika je zn\u00e1ma svojou extr\u00e9mnou tvrdos\u0165ou a odolnos\u0165ou, ktor\u00e1 je na Mohsovej stupnici druh\u00e1 najtvrd\u0161ia po diamante, pokia\u013e ide o odolnos\u0165 vo\u010di oderu a n\u00e1razom. Okrem toho je korundov\u00e1 keramika v\u010faka svojej tepelnej vodivosti a odolnosti vo\u010di chemik\u00e1li\u00e1m\/kor\u00f3zii vhodn\u00e1 na v\u00fdmenu dielov vo vysoko presn\u00fdch strojoch a zariadeniach.<\/p>\n
Hlin\u00edkov\u00fa keramiku mo\u017eno metalizova\u0165 pre aplik\u00e1cie vy\u017eaduj\u00face vysokointegr\u00e1lne, hrubovrstvov\u00e9 metalizovan\u00e9 zariadenia s vodiv\u00fdmi a odporov\u00fdmi sie\u0165ami a sp\u00e1jkovate\u013en\u00fdmi rozhraniami vr\u00e1tane vysokovakuov\u00fdch syst\u00e9mov, laserov\u00fdch zariaden\u00ed (plynov\u00fdch, polovodi\u010dov\u00fdch a vlnovodov\u00fdch), r\u00f6ntgenov\u00fdch trub\u00edc a elektr\u00f3nov\u00fdch mikroskopov. Hlin\u00edkov\u00e1 keramika je v\u010faka svojej schopnosti odol\u00e1va\u0165 vysok\u00fdm teplot\u00e1m aj vynikaj\u00facim biomedic\u00ednskym materi\u00e1lom, ako s\u00fa umel\u00e9 k\u013aby, kostn\u00e9 di\u0161tan\u010dn\u00e9 vlo\u017eky a kochle\u00e1rne implant\u00e1ty; okrem toho s\u00fa to v\u010faka tomuto kvalitn\u00e9mu materi\u00e1lu cenn\u00e9 priemyseln\u00e9 v\u00fdrobky, ako s\u00fa \u010derpadl\u00e1 a ventily!<\/p>\n
Oxid hlinit\u00fd je d\u00f4le\u017eit\u00fd materi\u00e1l na povrchov\u00fa \u00fapravu, ktor\u00fd sa \u010dasto pou\u017e\u00edva v r\u00f4znych priemyseln\u00fdch odvetviach na povrchov\u00fa \u00fapravu. V\u010faka svojej tvrdosti, chemickej stabilite, tepelnej odolnosti, trvanlivosti a nereakt\u00edvnosti predstavuje ide\u00e1lne rie\u0161enie pre r\u00f4zne \u00falohy le\u0161tenia povrchov bez rizika kontamin\u00e1cie alebo zmeny povrchu povrchov\u00e9ho materi\u00e1lu.<\/p>\n
Oxid hlinit\u00fd sa dod\u00e1va v pr\u00e1\u0161koch, suspenzi\u00e1ch a suspenzi\u00e1ch r\u00f4znych ve\u013ekost\u00ed a balen\u00ed. Tvar a ve\u013ekos\u0165 \u010dast\u00edc v\u00fdrazne ovplyv\u0148uj\u00fa le\u0161tiaci v\u00fdkon pr\u00e1\u0161kov\u00e9ho oxidu hlinit\u00e9ho: agres\u00edvne \u010dastice r\u00fdchlo odstra\u0148uj\u00fa materi\u00e1l, zatia\u013e \u010do jemnej\u0161ie gu\u013e\u00f4\u010dky poskytuj\u00fa hladk\u00e9 reflexn\u00e9 povrchy. Okrem toho konzistentn\u00e1 distrib\u00facia ve\u013ekosti \u010dast\u00edc zabezpe\u010duje, \u017ee jeho v\u00fdkon zost\u00e1va kon\u0161tantn\u00fd od \u0161ar\u017ee k \u0161ar\u017ei.<\/p>\n
Na pr\u00edpravu oxidu hlinit\u00e9ho ako le\u0161tiaceho materi\u00e1lu sa mus\u00ed najprv rozomlie\u0165 na jemn\u00e9 \u010dastice a zmie\u0161a\u0165 s vodou alebo povrchovo akt\u00edvnymi l\u00e1tkami, aby sa vytvorila ka\u0161a oxidu hlinit\u00e9ho, ktor\u00e1 sa potom m\u00f4\u017ee pou\u017ei\u0165 pri viacer\u00fdch le\u0161tiacich aplik\u00e1ci\u00e1ch. Be\u017en\u00e9 pr\u00edpravky pozost\u00e1vaj\u00fa z povrchovo akt\u00edvnych l\u00e1tok, vody a pr\u00e1\u0161kov\u00e9ho oxidu hlinit\u00e9ho; ich mno\u017estvo z\u00e1vis\u00ed od jednotliv\u00fdch aplik\u00e1ci\u00ed.<\/p>\n
Chemick\u00e9 zlo\u017eenie ka\u0161e oxidu hlinit\u00e9ho je rozhoduj\u00face pre jej \u00fa\u010dinnos\u0165 ako le\u0161tiaceho materi\u00e1lu. Typick\u00e9 zlo\u017eenie tejto suspenzie zah\u0155\u0148a \u010dastice oxidu hlinit\u00e9ho, vodu a povrchovo akt\u00edvne l\u00e1tky; v z\u00e1vislosti od konkr\u00e9tnej aplik\u00e1cie sa m\u00f4\u017eu prida\u0165 \u010fal\u0161ie pr\u00edsady, ako s\u00fa \u010dastice zirk\u00f3nu na zv\u00fd\u0161enie h\u00fa\u017eevnatosti alebo metli\u010dky karbidu krem\u00edka na zv\u00fd\u0161enie \u00fa\u010dinnosti rezania.<\/p>\n
\u010cist\u00fd oxid hlinit\u00fd sa vyr\u00e1ba z \u0165a\u017een\u00e9ho miner\u00e1lu bauxitu, ktor\u00fd obsahuje hydroxid hlinit\u00fd. Hlin\u00edk sa potom z\u00edskava Bayerov\u00fdm procesom rozp\u00fa\u0161\u0165an\u00edm oxidu hlinit\u00e9ho v kaustickej s\u00f3de. Len v Austr\u00e1lii sa zo \u0161iestich rafin\u00e9ri\u00ed nach\u00e1dzaj\u00facich sa v \u0161t\u00e1te Nov\u00fd Ju\u017en\u00fd Wales vyrob\u00ed ro\u010dne pribli\u017ene 1,4 miliardy ton oxidu hlinit\u00e9ho; to predstavuje polovicu celosvetovej produkcie oxidu hlinit\u00e9ho; v\u00fdznamne k nej prispievaj\u00fa aj \u010c\u00edna, Braz\u00edlia a India.<\/p>","protected":false},"excerpt":{"rendered":"
Oxid hlinit\u00fd je biela kry\u0161talick\u00e1 pevn\u00e1 l\u00e1tka, ktor\u00fa mo\u017eno formova\u0165 do r\u00f4znych tvarov. Okrem toho, \u017ee je h\u00fa\u017eevnat\u00fd a tvrd\u00fd, [...]<\/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-729","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/artehistoria.net\/sk\/wp-json\/wp\/v2\/posts\/729","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=729"}],"version-history":[{"count":1,"href":"https:\/\/artehistoria.net\/sk\/wp-json\/wp\/v2\/posts\/729\/revisions"}],"predecessor-version":[{"id":730,"href":"https:\/\/artehistoria.net\/sk\/wp-json\/wp\/v2\/posts\/729\/revisions\/730"}],"wp:attachment":[{"href":"https:\/\/artehistoria.net\/sk\/wp-json\/wp\/v2\/media?parent=729"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/artehistoria.net\/sk\/wp-json\/wp\/v2\/categories?post=729"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/artehistoria.net\/sk\/wp-json\/wp\/v2\/tags?post=729"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}