{"id":125,"date":"2024-06-18T14:55:30","date_gmt":"2024-06-18T06:55:30","guid":{"rendered":"https:\/\/aluminaceramics.net\/?p=125"},"modified":"2024-07-15T20:05:56","modified_gmt":"2024-07-15T12:05:56","slug":"chemicky-vzorec-oxidu-hliniteho","status":"publish","type":"post","link":"https:\/\/aluminaceramics.net\/sk\/the-chemical-formula-for-alumina\/","title":{"rendered":"Chemick\u00fd vzorec oxidu hlinit\u00e9ho"},"content":{"rendered":"<p>Al2O3 je chemick\u00fd vzorec oxidu hlinit\u00e9ho, najroz\u0161\u00edrenej\u0161ieho pr\u00edrodn\u00e9ho oxidu hlinit\u00e9ho, ktor\u00fd sa vyskytuje v pr\u00edrode. Kry\u0161t\u00e1ly korundu vznikaj\u00fa z tohto miner\u00e1lu a tvoria z\u00e1klad rub\u00ednov a zaf\u00edrov s jedine\u010dn\u00fdmi farbami v\u010faka stopov\u00fdm pr\u00edmesiam, ako je chr\u00f3m alebo \u017eelezo, ktor\u00e9 s\u00fa pr\u00edtomn\u00e9 v ich kry\u0161t\u00e1lovej \u0161trukt\u00fare.<\/p>\n<p>Bezvod\u00fd hydr\u00e1t oxidu hlinit\u00e9ho (AAH) sa m\u00f4\u017ee vyr\u00e1ba\u0165 l\u00fahovan\u00edm bauxitovej rudy s kaustickou sodou pomocou Bayerovho procesu a nesk\u00f4r sa sprac\u00fava kalcin\u00e1ciou na bezvod\u00fd AAH alebo spekan\u00edm do high-tech keramick\u00fdch v\u00fdrobkov.<\/p>\n<h2>Chemick\u00fd vzorec<\/h2>\n<p>Al2O3 je amfotern\u00fd oxid zlo\u017een\u00fd z jedn\u00e9ho at\u00f3mu hlin\u00edka a dvoch at\u00f3mov kysl\u00edka. Je biely, nem\u00e1 v\u00fdrazn\u00fd z\u00e1pach, na vzduchu tuhne a v chemick\u00fdch reakci\u00e1ch funguje ako kyselina aj z\u00e1sada. Hlin\u00edk sa z\u00edskava z lo\u017e\u00edsk bauxitu, ktor\u00e9 sa nach\u00e1dzaj\u00fa v tropick\u00fdch a subtropick\u00fdch oblastiach, ako aj z korundu, ktor\u00fd sa pou\u017e\u00edva na v\u00fdrobu izol\u00e1torov zapa\u013eovac\u00edch svie\u010dok a in\u00fdch elektrick\u00fdch s\u00fa\u010diastok; jeho prim\u00e1rne vyu\u017eitie v\u0161ak spo\u010d\u00edva vo v\u00fdrobe kovov\u00e9ho hlin\u00edka elektrol\u00fdzou.<\/p>\n<p>Bauxit, ktor\u00fd obsahuje pribli\u017ene tretinu svetov\u00fdch z\u00e1sob hlin\u00edka, sa \u0165a\u017e\u00ed v\u0155tan\u00edm a odstrelom v podzemn\u00fdch alebo povrchov\u00fdch baniach, potom sa zmie\u0161a so s\u00f3dou kaustickou, aby sa vyl\u00fahovala jeho ruda. Filtra\u010dn\u00fdmi a zr\u00e1\u017eac\u00edmi met\u00f3dami sa potom oddel\u00ed oxid hlinit\u00fd a \u010fal\u0161ou kalcin\u00e1ciou sa \u010falej \u010dist\u00ed. Tento kone\u010dn\u00fd produkt, hlinitan sodn\u00fd, sa potom pou\u017e\u00edva v priemysle a na v\u00fdrobu \u017eiaruvzdorn\u00fdch v\u00fdrobkov.<\/p>\n<p>Technick\u00e1 keramika vyu\u017e\u00edva pri v\u00fdrobe n\u00edzku elektrick\u00fa vodivos\u0165 zirk\u00f3nu, odolnos\u0165 vo\u010di p\u00f4sobeniu kysel\u00edn a z\u00e1sad, vysok\u00fa pevnos\u0165 a tuhos\u0165. Medzi aplik\u00e1cie tejto keramiky patria vysokoteplotn\u00e9 elektrick\u00e9 a nap\u00e4\u0165ov\u00e9 izol\u00e1tory, tesniace kr\u00fa\u017eky pre plynov\u00e9 laserov\u00e9 trubice a laborat\u00f3rne zariadenia.<\/p>\n<p>Oxid hlinit\u00fd sa pou\u017e\u00edva pri elektrol\u00fdze na v\u00fdrobu kovov\u00e9ho hlin\u00edka a predstavuje 90% v\u0161etk\u00e9ho vyroben\u00e9ho oxidu hlinit\u00e9ho. Zliatiny oxidu hlinit\u00e9ho a oxidu zirkoni\u010dit\u00e9ho mo\u017eno n\u00e1js\u0165 aj ako br\u00fasne m\u00e9di\u00e1 pre keramiku, oce\u013e a liatinu; ich ve\u013emi tvrd\u00e1 \u0161trukt\u00fara m\u00e1 ve\u013emi n\u00edzku \u00farove\u0148 p\u00f3rovitosti, \u010do z nich rob\u00ed \u017eiaduce brusivo.<\/p>\n<p>Mikrokry\u0161talick\u00fd oxid hlinit\u00fd v sol-g\u00e9le sa vytv\u00e1ra rozpt\u00fdlen\u00edm submikr\u00f3nov\u00fdch \u010dast\u00edc prekurzora oxidu hlinit\u00e9ho, ako je napr\u00edklad boehmit (Al2O3), vo vodnom g\u00e9le s peptizuj\u00facimi \u010dinidlami a pr\u00edpadne s mal\u00fdm mno\u017estvom nesklenen\u00e9ho pomocn\u00e9ho prostriedku na pradenie. Po ust\u00e1len\u00ed tejto zmesi pri izbovej alebo vy\u0161\u0161ej teplote pre spekan\u00e9 aplik\u00e1cie sa semen\u00e1 extrahuj\u00fa pred zahriat\u00edm v peci na teplotu konverzie alebo vy\u0161\u0161iu teplotu pre spekan\u00e9 v\u00fdrobky, pri\u010dom v tomto bode sa semen\u00e1 odstr\u00e1nia pomocou disperzn\u00fdch \u010dinidiel alebo zahrievan\u00edm v peci a\u017e do doby, k\u00fdm ned\u00f4jde ku konverzii alebo spekanej v\u00fdrobe, kedy sa semen\u00e1 musia extrahova\u0165 pomocou disperzn\u00fdch \u010dinidiel pred extrakciou v tomto kroku.<\/p>\n<h2>Fyzik\u00e1lne vlastnosti<\/h2>\n<p>Oxid hlinit\u00fd (Al2O3) je jedn\u00fdm z dvoch najroz\u0161\u00edrenej\u0161\u00edch prvkov v zemskej k\u00f4re a tvor\u00ed pevn\u00fa l\u00e1tku bez v\u00fdraznej chuti alebo z\u00e1pachu. Prirodzene sa vyskytuje v tropick\u00fdch p\u00f4dach naz\u00fdvan\u00fdch laterity, ako aj v rud\u00e1ch \u0165a\u017een\u00fdch Bayerov\u00fdm procesom a p\u00f4sob\u00ed ako elektrick\u00fd izolant s vysokou tepelnou vodivos\u0165ou; reaguje s kyselinami a z\u00e1sadami, ale pova\u017euje sa za netoxick\u00fd.<\/p>\n<p>Chemick\u00e1 inertnos\u0165 oxidu hlinit\u00e9ho z neho rob\u00ed ide\u00e1lny materi\u00e1l na v\u00fdrobu priemyselnej keramiky. Kry\u0161t\u00e1ly korundu tvoria z\u00e1klad mnoh\u00fdch drah\u00fdch kame\u0148ov, ako s\u00fa rub\u00edny a zaf\u00edry, pri\u010dom farbu im dod\u00e1va r\u00f4zne mno\u017estvo chr\u00f3mu a pr\u00edmes\u00ed \u017eeleza v ich jadre. V\u010faka svojej tvrdosti a pevnosti sa oxid hlinit\u00fd be\u017ene pou\u017e\u00edva aj ako abraz\u00edvum na br\u00fasne papiere, zatia\u013e \u010do jeho tepeln\u00e1 stabilita mu umo\u017e\u0148uje odol\u00e1va\u0165 zv\u00fd\u0161en\u00fdm teplot\u00e1m, tak\u017ee je vhodn\u00fd na pou\u017eitie na oblo\u017eenie vysokoteplotn\u00fdch zariaden\u00ed, ako s\u00fa pece a pece.<\/p>\n<p>Plast vystu\u017een\u00fd sklenen\u00fdmi vl\u00e1knami (GFRP) sa tie\u017e \u0161iroko pou\u017e\u00edva na v\u00fdrobu \u017eiaruvzdorn\u00fdch materi\u00e1lov, le\u0161tiacich a br\u00fasnych v\u00fdrobkov a na povrchov\u00fa \u00fapravu tit\u00e1nov\u00fdch pigmentov. GFRP vykazuje vynikaj\u00facu mechanick\u00fa pevnos\u0165 a odolnos\u0165 proti oderu, ako aj to, \u017ee sa d\u00e1 odlieva\u0165 do tenk\u00fdch alebo ve\u013ek\u00fdch dielov bez toho, aby sa \u010dasom deformoval; okrem toho je v\u010faka svojej schopnosti odol\u00e1va\u0165 teplu a kor\u00f3zii vhodn\u00fd aj na nieko\u013eko \u010fal\u0161\u00edch pou\u017eit\u00ed.<\/p>\n<p>Oxid hlinit\u00fd reaguje so vzduchom vo vode za vzniku i\u00f3nov Al2+ a OH-, ktor\u00e9 sa sp\u00e1jaj\u00fa a vytv\u00e1raj\u00fa na povrchu kovu oxidov\u00fd film a chr\u00e1nia ho pred \u010fal\u0161ou oxid\u00e1ciou, ako aj pred kor\u00f3znymi \u010dinite\u013emi prostredia. Tento proces chr\u00e1ni materi\u00e1l pred \u010fal\u0161ou anodickou oxid\u00e1ciou a z\u00e1rove\u0148 ho chr\u00e1ni pred \u010fal\u0161\u00edmi hrozbami kor\u00f3zie v jeho okol\u00ed.<\/p>\n<p>V\u010faka svojej chemickej inertnosti je oxid hlinit\u00fd odoln\u00fd vo\u010di kor\u00f3zii sp\u00f4sobenej mnoh\u00fdmi chemik\u00e1liami a \u010dinidlami, tak\u017ee je vhodn\u00fd na aplik\u00e1cie vy\u017eaduj\u00face vysok\u00fa \u010distotu a stabilitu, napr\u00edklad vo farmaceutickom priemysle. Okrem toho je oxid hlinit\u00fd v\u010faka svojej tepelnej stabilite vynikaj\u00facou vo\u013ebou materi\u00e1lu na pou\u017eitie v chromatografick\u00fdch aplik\u00e1ci\u00e1ch.<\/p>\n<p>Hlin\u00edk mo\u017eno kombinova\u0165 s kyselinami a z\u00e1sadami na v\u00fdrobu r\u00f4znych materi\u00e1lov vysokej \u010distoty, ktor\u00e9 m\u00f4\u017eu sl\u00fa\u017ei\u0165 ako suroviny pre r\u00f4zne aplik\u00e1cie. M\u00f4\u017ee sa napr\u00edklad kalcinova\u0165 na v\u00fdrobu vysoko \u010dist\u00e9ho oxidu hlinit\u00e9ho, ktor\u00fd sa pou\u017e\u00edva pri v\u00fdrobe \u017eiaruvzdorn\u00fdch materi\u00e1lov a keramiky alebo sa pou\u017e\u00edva ako nosi\u010d katalyz\u00e1torov; t\u00fdmto procesom sa m\u00f4\u017eu vyr\u00e1ba\u0165 aj aktivovan\u00e9 hlin\u00edky s v\u00e4\u010d\u0161\u00edm povrchom a vhodnej\u0161ou \u0161trukt\u00farou p\u00f3rov.<\/p>\n<h2>Chemick\u00e9 reakcie<\/h2>\n<p>Hlin\u00edk je jedn\u00fdm z dvoch najroz\u0161\u00edrenej\u0161\u00edch kovov na Zemi a nach\u00e1dza sa najm\u00e4 v tropick\u00fdch p\u00f4dach zn\u00e1mych ako laterity alebo bauxity. Hlin\u00edk sa d\u00e1 extrahova\u0165 Bayerov\u00fdm procesom rozp\u00fa\u0161\u0165an\u00edm oxidu hlinit\u00e9ho v roztoku hydroxidu sodn\u00e9ho, potom izol\u00e1ciou hydroxidu sodn\u00e9ho od nerozpustn\u00e9ho hydroxidu hlinit\u00e9ho a n\u00e1sledn\u00fdm spl\u00e1chnut\u00edm cel\u00e9ho zost\u00e1vaj\u00faceho vodn\u00e9ho roztoku.<\/p>\n<p>Oxid hlinit\u00fd je zn\u00e1my svojimi v\u00fdnimo\u010dn\u00fdmi vlastnos\u0165ami, ako je n\u00edzka elektrick\u00e1 vodivos\u0165 a odolnos\u0165 vo\u010di chemick\u00fdm \u00fatokom, vysok\u00e1 pevnos\u0165 a extr\u00e9mna tvrdos\u0165 (9 stup\u0148ov Mohsovej stupnice). Hlin\u00edk nach\u00e1dza uplatnenie v r\u00f4znych priemyseln\u00fdch odvetviach ako surovina na v\u00fdrobu \u017eiaruvzdorn\u00fdch v\u00fdrobkov, ako aj ako katalyz\u00e1tor v niektor\u00fdch chemick\u00fdch reakci\u00e1ch a zohr\u00e1va d\u00f4le\u017eit\u00fa \u00falohu pri \u010disten\u00ed vody t\u00fdm, \u017ee pom\u00e1ha odstra\u0148ova\u0165 organick\u00e9 l\u00e1tky z pitnej a odpadovej vody.<\/p>\n<p>Hlin\u00edk m\u00e1 ortorhombick\u00fa \u0161trukt\u00faru kry\u0161t\u00e1lovej mrie\u017eky s tesn\u00fdm usporiadan\u00edm, ktor\u00fa tvoria i\u00f3ny kysl\u00edka a hlin\u00edka vyplnen\u00e9 z dvoch tret\u00edn v pr\u00edslu\u0161n\u00fdch medzipriestoroch, \u010do mu zabezpe\u010duje vynikaj\u00facu odolnos\u0165 vo\u010di chemik\u00e1li\u00e1m a kyselin\u00e1m, ako aj ve\u013ek\u00fa tepeln\u00fa vodivos\u0165 pri zv\u00fd\u0161en\u00fdch teplot\u00e1ch.<\/p>\n<p>Oxid hlinit\u00fd je v\u010faka svojmu ve\u013ek\u00e9mu povrchu a mechanickej pevnosti \u00fa\u010dinn\u00fdm adsorbentom. Prim\u00e1rne sa pou\u017e\u00edva pri \u00faprave vody na odstra\u0148ovanie nebezpe\u010dn\u00fdch organick\u00fdch l\u00e1tok, ako aj zl\u00fa\u010den\u00edn sp\u00f4sobuj\u00facich sfarbenie a z\u00e1pach z dod\u00e1vok pitnej vody, a tie\u017e sa vo ve\u013ekej miere pou\u017e\u00edva ako zlo\u017eka pri v\u00fdrobe \u017eiaruvzdorn\u00fdch v\u00fdrobkov pre skl\u00e1rsky a keramick\u00fd priemysel.<\/p>\n<p>Hlin\u00edk sa vo v\u0161eobecnosti nepova\u017euje za mimoriadne reakt\u00edvny kov, av\u0161ak reaguje s chl\u00f3rom, flu\u00f3rom a br\u00f3mom za vzniku halogenidov hlin\u00edka(III). Okrem toho kovov\u00fd hlin\u00edk dok\u00e1\u017ee reagova\u0165 s in\u00fdmi halog\u00e9nmi, ako s\u00fa chl\u00f3r, flu\u00f3r a br\u00f3m, za vzniku halogenidov hlin\u00edka(III); okrem toho podlieha aluminotermick\u00fdm reakci\u00e1m s in\u00fdmi kovmi alebo nekovmi, najm\u00e4 s hor\u010d\u00edkom a c\u00ednom; je tie\u017e zn\u00e1me, \u017ee reaguje so siln\u00fdmi kyselinami, ako je kyselina s\u00edrov\u00e1 a chlorovod\u00edkov\u00e1; av\u0161ak v\u010faka svojmu ochrann\u00e9mu povlaku z oxidu vo v\u0161eobecnosti nereaguje prudko proti in\u00fdm kyselin\u00e1m; sk\u00f4r ako prudko reaguje proti in\u00fdm reakci\u00e1m, m\u00e1 tendenciu reagova\u0165 menej prudko proti in\u00fdm kyselin\u00e1m v d\u00f4sledku t\u00fdchto procesov.<\/p>\n<h2>Aplik\u00e1cie<\/h2>\n<p>Oxid hlinit\u00fd mo\u017eno n\u00e1js\u0165 v mnoh\u00fdch \u010fal\u0161\u00edch aplik\u00e1ci\u00e1ch mimo v\u00fdroby hlin\u00edka, vr\u00e1tane pou\u017eitia ako abraz\u00edva a zlo\u017eky keramiky s v\u00fdnimo\u010dnou tvrdos\u0165ou a odolnos\u0165ou proti opotrebovaniu. Okrem toho sl\u00fa\u017ei ako katalyz\u00e1tor pri r\u00f4znych chemick\u00fdch reakci\u00e1ch a poskytuje izola\u010dn\u00e9 vlastnosti u\u017eito\u010dn\u00e9 v elektrick\u00fdch zariadeniach a stavebn\u00fdch materi\u00e1loch - v\u010faka biokompatibilite je oxid hlinit\u00fd ide\u00e1lnou vo\u013ebou materi\u00e1lu pri v\u00fdrobe lek\u00e1rskych implant\u00e1tov.<\/p>\n<p>Korund je mimoriadne roz\u0161\u00edren\u00fd materi\u00e1l pou\u017e\u00edvan\u00fd na v\u00fdrobu vysokopevnostn\u00fdch, ale \u013eahk\u00fdch rezn\u00fdch n\u00e1strojov, ako aj br\u00fasnych papierov, ktor\u00e9 sa \u010dasto vyzna\u010duj\u00fa charakteristickou tvrdos\u0165ou 9 na Mohsovej stupnici - druhou najvy\u0161\u0161ou po diamante a rub\u00edne.<\/p>\n<p>Vysok\u00fd bod tavenia oxidu hlinit\u00e9ho z neho rob\u00ed vynikaj\u00faci materi\u00e1l na vyzdievanie pec\u00ed, spa\u013eovn\u00ed a reaktorov r\u00f4zneho druhu. Obklady z oxidu hlinit\u00e9ho sa dokonca nach\u00e1dzaj\u00fa vo vn\u00fatri palivov\u00fdch kan\u00e1lov uho\u013en\u00fdch elektr\u00e1rn\u00ed na ochranu pred n\u00e1razov\u00fdmi silami.<\/p>\n<p>V\u010faka svojej chemickej stabilite na\u0161la korundov\u00e1 keramika skvel\u00e9 uplatnenie ako kyselinovzdorn\u00e9 obe\u017en\u00e9 koles\u00e1 \u010derpadiel a oblo\u017eenia potrub\u00ed; t\u00e1to keramika odol\u00e1va teplot\u00e1m a\u017e do 900 stup\u0148ov Celzia a z\u00e1rove\u0148 je vynikaj\u00facim abraz\u00edvnym materi\u00e1lom, ktor\u00fd mo\u017eno n\u00e1js\u0165 v priemyseln\u00fdch br\u00fasnych materi\u00e1loch, ako s\u00fa br\u00fasne kot\u00fa\u010de a drvina.<\/p>\n<p>Silik\u00f3nov\u00e1 guma je d\u00f4le\u017eit\u00fdm materi\u00e1lom pou\u017e\u00edvan\u00fdm pri v\u00fdrobe vysoko odoln\u00fdch pneumat\u00edk a gumov\u00fdch v\u00fdrobkov, ako s\u00fa lepidl\u00e1 a tmely, so zv\u00fd\u0161enou odolnos\u0165ou pneumat\u00edk, ako aj pri zvy\u0161ovan\u00ed pevnosti a trvanlivosti bet\u00f3nu, odolnosti \u0161portov\u00fdch zariaden\u00ed proti oderu a ochrane oce\u013eov\u00fdch a hlin\u00edkov\u00fdch kon\u0161trukci\u00ed proti kor\u00f3zii.<\/p>\n<p>Napokon, oxid hlinit\u00fd sa m\u00f4\u017ee pou\u017ei\u0165 na v\u00fdrobu \u017eiaruvzdorn\u00fdch teh\u00e1l. Okrem toho sl\u00fa\u017ei ako neoddelite\u013en\u00fd materi\u00e1l pri v\u00fdrobe tepelnej izol\u00e1cie budov a in\u00fdch kon\u0161trukci\u00ed.<\/p>\n<p>Pr\u00e1\u0161ok oxidu hlinit\u00e9ho m\u00f4\u017ee ma\u0165 podobu sivobieleho zrnit\u00e9ho materi\u00e1lu alebo hodv\u00e1bne bieleho, hust\u00e9ho pr\u00e1\u0161ku. Pridan\u00edm zirk\u00f3nu alebo karbidu krem\u00edka mo\u017eno vytvori\u0165 priesvitn\u00fd oxid hlinit\u00fd. Oxid hlinit\u00fd sa \u010dasto vyu\u017e\u00edva v kovospracuj\u00facich aplik\u00e1ci\u00e1ch na v\u00fdrobu povlakov AlZnO, ktor\u00e9 sa pou\u017e\u00edvaj\u00fa pri v\u00fdrobe skla pri vysok\u00fdch teplot\u00e1ch, ako aj na in\u00e9 skl\u00e1rske a keramick\u00e9 technick\u00e9 \u00fa\u010dely; okrem toho sl\u00fa\u017ei ako vynikaj\u00faci spoma\u013eova\u010d horenia, ktor\u00fd spoma\u013euje \u0161\u00edrenie oh\u0148a v materi\u00e1loch.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-193\" src=\"https:\/\/aluminaceramics.net\/wp-content\/uploads\/2024\/06\/The-Chemical-Formula-For-Alumina.jpg\" alt=\"Chemick\u00fd vzorec oxidu hlinit\u00e9ho\" width=\"800\" height=\"800\" srcset=\"https:\/\/aluminaceramics.net\/wp-content\/uploads\/2024\/06\/The-Chemical-Formula-For-Alumina.jpg 800w, https:\/\/aluminaceramics.net\/wp-content\/uploads\/2024\/06\/The-Chemical-Formula-For-Alumina-300x300.jpg 300w, https:\/\/aluminaceramics.net\/wp-content\/uploads\/2024\/06\/The-Chemical-Formula-For-Alumina-150x150.jpg 150w, https:\/\/aluminaceramics.net\/wp-content\/uploads\/2024\/06\/The-Chemical-Formula-For-Alumina-768x768.jpg 768w, https:\/\/aluminaceramics.net\/wp-content\/uploads\/2024\/06\/The-Chemical-Formula-For-Alumina-12x12.jpg 12w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>Al2O3 is the chemical formula for alumina, the most abundant naturally-occurring aluminum oxide found in nature. Corundum crystals form from [&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":"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":[6],"tags":[],"class_list":["post-125","post","type-post","status-publish","format-standard","hentry","category-alumina-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/aluminaceramics.net\/sk\/wp-json\/wp\/v2\/posts\/125","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aluminaceramics.net\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aluminaceramics.net\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aluminaceramics.net\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aluminaceramics.net\/sk\/wp-json\/wp\/v2\/comments?post=125"}],"version-history":[{"count":3,"href":"https:\/\/aluminaceramics.net\/sk\/wp-json\/wp\/v2\/posts\/125\/revisions"}],"predecessor-version":[{"id":194,"href":"https:\/\/aluminaceramics.net\/sk\/wp-json\/wp\/v2\/posts\/125\/revisions\/194"}],"wp:attachment":[{"href":"https:\/\/aluminaceramics.net\/sk\/wp-json\/wp\/v2\/media?parent=125"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aluminaceramics.net\/sk\/wp-json\/wp\/v2\/categories?post=125"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aluminaceramics.net\/sk\/wp-json\/wp\/v2\/tags?post=125"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}