{"id":116,"date":"2024-06-14T20:07:33","date_gmt":"2024-06-14T12:07:33","guid":{"rendered":"https:\/\/aluminaceramics.net\/?p=116"},"modified":"2024-07-15T20:08:16","modified_gmt":"2024-07-15T12:08:16","slug":"struktura-oxidu-hliniteho","status":"publish","type":"post","link":"https:\/\/aluminaceramics.net\/sk\/the-alumina-structure\/","title":{"rendered":"\u0160trukt\u00fara oxidu hlinit\u00e9ho"},"content":{"rendered":"<p>Alumina je pozoruhodn\u00e1 kry\u0161talick\u00e1 forma oxidu hlinit\u00e9ho s vynikaj\u00facimi vlastnos\u0165ami. Vyzna\u010duje sa n\u00edzkou elektrickou vodivos\u0165ou, vysokou pevnos\u0165ou a extr\u00e9mnou tvrdos\u0165ou pod\u013ea Mohsovej stupnice; okrem toho m\u00e1 ve\u013ek\u00fa akumula\u010dn\u00fa kapacitu.<\/p>\n<p>Hoci s\u00fa vlastnosti oxidu hlinit\u00e9ho p\u00f4sobiv\u00e9, jeho mikrostrukt\u00fara je st\u00e1le predmetom diskusi\u00ed. D\u00f4vodom s\u00fa nezhody t\u00fdkaj\u00face sa umiestnenia kati\u00f3nov v jeho objemovej element\u00e1rnej bunke a toho, \u010di sa v nej nach\u00e1dza interstici\u00e1lny vod\u00edk.<\/p>\n<h2>g-Al\u2082O\u2083<\/h2>\n<p>\u0160trukt\u00fara oxidu hlinit\u00e9ho g-Al\u2082O\u2083 je k\u013e\u00fa\u010dov\u00e1 pre vysvetlenie jeho reaktivity. Vyzna\u010duje sa povrchovou vrstvou s \u00fapln\u00fdm zakon\u010den\u00edm kysl\u00edkom a pod \u0148ou sa nach\u00e1dzaj\u00fa skr\u00e1ten\u00e9 dvojit\u00e9 vrstvy Al typu 53%, ktor\u00e9 s\u00fa tie\u017e \u00faplne zakon\u010den\u00e9 kysl\u00edkom. Pri vystaven\u00ed vlhkosti m\u00f4\u017ee bu\u010f vytv\u00e1ra\u0165 akt\u00edvny oxid hlinit\u00fd (g-Al(OH)\u2083), alebo \u010diasto\u010dne hydroxylovan\u00e9 oxidy hlinit\u00e9, ako je g-Al\u2082O\u2083-c, ktor\u00e9 maj\u00fa odli\u0161n\u00e9 reakt\u00edvne vlastnosti v d\u00f4sledku \u0161truktur\u00e1lnych rozdielov medzi nimi.<\/p>\n<p>\u0160t\u00fadie kry\u0161t\u00e1lovej \u0161trukt\u00fary g-Al\u2082O\u2083 boli vykonan\u00e9 pomocou selekt\u00edvnej plo\u0161nej elektr\u00f3novej difrakcie (SAED) a pr\u00e1\u0161kovej r\u00f6ntgenovej difrakcie (XRD). Anal\u00fdza SAED nazna\u010duje, \u017ee prevl\u00e1daj\u00facimi \u0161truktur\u00e1lnymi defektmi s\u00fa protif\u00e1zov\u00e9 hranice nach\u00e1dzaj\u00face sa na rovin\u00e1ch mrie\u017eky, ktor\u00e9 ved\u00fa k posunom v r\u00e1mci podmrie\u017eky; ich presn\u00e1 povaha v\u0161ak zost\u00e1va nezisten\u00e1.<\/p>\n<p>V\u00fdskum \u0161trukt\u00far g-Al\u2082O\u2083 odhalil, \u017ee v z\u00e1vislosti od typu m\u00f4\u017eu konzervat\u00edvne aj nekonzervat\u00edvne antif\u00e1zov\u00e9 hranice (APB) sp\u00f4sobi\u0165 posuny v umiestnen\u00ed bu\u010f kati\u00f3nov\u00fdch miest, alebo pr\u00e1zdnych oktaedrick\u00fdch miest; okrem toho ich pr\u00edtomnos\u0165 ovplyv\u0148uje aj stabilitu kry\u0161talickej \u0161trukt\u00fary oxidu hlinit\u00e9ho.<\/p>\n<p>Tieto nekonzervat\u00edvne APB maj\u00fa ve\u013ek\u00fd vplyv na \u0161truktur\u00e1lne vlastnosti g-Al\u2082O\u2083. M\u00f4\u017eu zmeni\u0165 polohy kati\u00f3nov a\u017e o 0,2, resp. 0,45 pre ka\u017ed\u00fd APB, pri\u010dom na vytvorenie konkr\u00e9tnych vektorov posunu s\u00fa potrebn\u00e9 \u010fal\u0161ie APB.<\/p>\n<p>Nekonzervat\u00edvne APB je mo\u017en\u00e9 generova\u0165 pomocou r\u00f4znych mechanizmov, vr\u00e1tane jednoduch\u00fdch k\u013azav\u00fdch a rota\u010dn\u00fdch hran\u00edc. Tieto mechanizmy vytv\u00e1raj\u00fa r\u00f4zne modely mikrostrukt\u00fary, ktor\u00e9 ved\u00fa k odli\u0161nej reaktivite oxidu hlinit\u00e9ho; pochopenie jeho \u0161trukt\u00fary je k\u013e\u00fa\u010dov\u00e9 pre efekt\u00edvne riadenie jeho reaktivity a tepelnej stability.<\/p>\n<h2>d-Al\u2082O\u2083<\/h2>\n<p>Oxid hlinit\u00fd (oxid hlinit\u00fd(III)) je zl\u00fa\u010denina pozost\u00e1vaj\u00faca z dvoch at\u00f3mov hlin\u00edka a troch at\u00f3mov kysl\u00edka v rovnakom pomere, ktor\u00e1 sa pou\u017e\u00edva ako br\u00fasny a \u017eiaruvzdorn\u00fd materi\u00e1l a je nevyhnutn\u00e1 pri v\u00fdrobe kovov\u00e9ho hlin\u00edka. Oxid hlinit\u00fd m\u00e1 r\u00f4zne fyzik\u00e1lne a chemick\u00e9 vlastnosti, v\u010faka ktor\u00fdm sa d\u00e1 \u013eahko spracova\u0165 na r\u00f4zne v\u00fdrobky s rozmanit\u00fdmi tvarmi, pri\u010dom z\u00e1rove\u0148 dobre odol\u00e1va kor\u00f3zii a opotrebeniu. Stal sa jednou z hlavn\u00fdch zlo\u017eiek pri v\u00fdrobe tohto prvku. Nach\u00e1dza sa aj v mnoh\u00fdch zmesiach pou\u017e\u00edvan\u00fdch vo v\u00fdrobnom procese hlin\u00edka. Hr\u00e1 tie\u017e neoddelite\u013en\u00fa \u00falohu vo v\u00fdrobnom procese a jeho v\u00fdroba je k\u013e\u00fa\u010dom k v\u00fdrobe samotn\u00e9ho hlin\u00edka!<\/p>\n<p>Pece typu Higgins pri teplot\u00e1ch 1350\u20131550 \u00b0C vytv\u00e1raj\u00fa \u0161trukt\u00faru oxidu hlinit\u00e9ho, zatia\u013e \u010do vodou chladen\u00e9 oce\u013eov\u00e9 alebo uhl\u00edkov\u00e9 pl\u00e1\u0161te obsahuj\u00face chladen\u00fa oce\u013e alebo uhl\u00edkov\u00e9 pl\u00e1\u0161te sl\u00fa\u017eia na jej r\u00fdchle ochladenie a kry\u0161taliz\u00e1ciu pred vylievan\u00edm roztavenej hmoty, \u010d\u00edm sa dosiahne r\u00fdchla kry\u0161taliz\u00e1cia a r\u00fdchle ochladenie taveniny. Po ochladen\u00ed sa hrubo kry\u0161talick\u00fd oxid hlinit\u00fd drv\u00ed na \u00fa\u010dely pou\u017eitia v vysokohustotn\u00fdch spekan\u00fdch materi\u00e1loch, ktor\u00e9 s\u00fa ur\u010den\u00e9 \u0161peci\u00e1lne pre n\u00e1ro\u010dn\u00e9 prostredia alebo aplik\u00e1cie.<\/p>\n<p>Oxid hlinit\u00fd sa vyzna\u010duje v\u00fdnimo\u010dnou odolnos\u0165ou proti kor\u00f3zii a opotrebeniu v\u010faka svojim jedine\u010dn\u00fdm fyzik\u00e1lnym a chemick\u00fdm vlastnostiam, v\u010faka \u010domu je vhodn\u00fd na pou\u017eitie v n\u00e1ro\u010dn\u00fdch prostrediach, ako je prieskum ropy a zemn\u00e9ho plynu, v\u00fdroba automobilov a leteck\u00fd priemysel, chemick\u00e9 spracovate\u013esk\u00e9 z\u00e1vody a skladovacie n\u00e1dr\u017ee na chemik\u00e1lie. Okrem toho sa tieto materi\u00e1ly daj\u00fa vyu\u017ei\u0165 aj pri v\u00fdrobe rezn\u00fdch a br\u00fasnych n\u00e1strojov s zv\u00fd\u0161en\u00fdmi po\u017eiadavkami na odolnos\u0165 proti oderu.<\/p>\n<p>Oxid hlinit\u00fd sa vyzna\u010duje nielen vynikaj\u00facou odolnos\u0165ou proti kor\u00f3zii a opotrebeniu, ale v\u010faka n\u00edzkej tepelnej vodivosti a vysokej teplote topenia je ide\u00e1lny aj na v\u00fdrobu tepelnej izol\u00e1cie a in\u00fdch tepelne odoln\u00fdch komponentov. Navy\u0161e jeho n\u00edzka hustota zjednodu\u0161uje v\u00fdrobu, ke\u010f\u017ee z neho mo\u017eno \u013eahko vytv\u00e1ra\u0165 r\u00f4zne tvary.<\/p>\n<p>Oxid hlinit\u00fd m\u00e1 at\u00f3mov\u00fa \u0161trukt\u00faru pripom\u00ednaj\u00facu syst\u00e9m hust\u00e9ho hexagon\u00e1lneho kry\u0161t\u00e1lu, v ktorom s\u00fa i\u00f3ny kysl\u00edka spojen\u00e9 kovalentn\u00fdmi v\u00e4zbami vytvoren\u00fdmi medzi ich oktaedrick\u00fdmi centrami. I\u00f3ny hlin\u00edka zauj\u00edmaj\u00fa dve tretiny t\u00fdchto medzier, zatia\u013e \u010do ich vlastn\u00e9 centr\u00e1 zaberaj\u00fa jednu tretinu. V d\u00f4sledku toho ide o mimoriadne \u017eiaruvzdorn\u00fd materi\u00e1l s n\u00edzkou elektrickou vodivos\u0165ou.<\/p>\n<p>Hlin\u00edk silne reaguje s kysl\u00edkom v ovzdu\u0161\u00ed, a preto sa na jeho povrchu vytv\u00e1ra tenk\u00e1 vrstva oxidu hlinit\u00e9ho, ktor\u00e1 zabra\u0148uje \u010fal\u0161ej oxid\u00e1cii. Tento proces sa naz\u00fdva eloxovanie a be\u017ene sa pou\u017e\u00edva pri mnoh\u00fdch zliatin\u00e1ch hlin\u00edka s cie\u013eom zv\u00fd\u0161i\u0165 odolnos\u0165 proti kor\u00f3zii a z\u00e1rove\u0148 vytvori\u0165 hlad\u0161\u00ed a tvrd\u0161\u00ed povrch, ktor\u00fd zvy\u0161uje pevnos\u0165 v \u0165ahu.<\/p>\n<h2>th-Al\u2082O\u2083<\/h2>\n<p>Oxid hlinit\u00fd (Al\u2082O\u2083) je anorganick\u00e1 chemick\u00e1 zl\u00fa\u010denina s chemick\u00fdm vzorcom Al\u2082O\u2083, ktor\u00e1 nach\u00e1dza \u0161irok\u00e9 uplatnenie v mnoh\u00fdch priemyseln\u00fdch odvetviach. Oxid hlinit\u00fd pozost\u00e1va z at\u00f3mov hlin\u00edka a kysl\u00edka spojen\u00fdch v kry\u0161t\u00e1lovej \u0161trukt\u00fare typu hexagon\u00e1lneho tesn\u00e9ho balenia (hcp) a patr\u00ed medzi najpou\u017e\u00edvanej\u0161ie zl\u00fa\u010deniny hlin\u00edka v s\u00fa\u010dasnosti; K\u013e\u00fa\u010dov\u00fdmi oblas\u0165ami vyu\u017eitia oxidu hlinit\u00e9ho s\u00fa v\u00fdroba, tavenie a protipo\u017eiarna ochrana, ako aj mnoh\u00e9 pou\u017eitia ako surovina, napr\u00edklad vo v\u00fdrobn\u00fdch procesoch chemik\u00e1li\u00ed, skla a keramiky, kde sa vyu\u017e\u00edvaj\u00fa jeho vlastnosti, v\u010faka ktor\u00fdm je oxid hlinit\u00fd nenahradite\u013en\u00fdm materi\u00e1lom.<\/p>\n<p>\u0160trukt\u00fara th-Al\u2082O\u2083 sa vyzna\u010duje vysok\u00fdm \u0161pecifick\u00fdm povrchom a \u00fazkym rozlo\u017een\u00edm ve\u013ekost\u00ed p\u00f3rov, v\u010faka \u010domu je tento materi\u00e1l ve\u013emi cenen\u00fd ako nosi\u010d katalyz\u00e1torov, kde jeho p\u00f3ry zohr\u00e1vaj\u00fa k\u013e\u00fa\u010dov\u00fa \u00falohu pri zabezpe\u010dovan\u00ed ich funk\u010dnosti. Al\u2082O\u2083 je z\u00e1rove\u0148 vynikaj\u00facim br\u00fasivom, \u010do z neho rob\u00ed nevyhnutn\u00fa zlo\u017eku rezn\u00fdch n\u00e1strojov a in\u00fdch br\u00fasnych aplik\u00e1ci\u00ed. V\u010faka svojej kry\u0161t\u00e1lovej \u0161trukt\u00fare vydr\u017e\u00ed th-Al\u2082O\u2083 vysok\u00e9 teploty, pri\u010dom jeho po\u010detn\u00e9 p\u00f3ry umo\u017e\u0148uj\u00fa tvorbu kry\u0161t\u00e1lov oxidu hlinit\u00e9ho. F\u00e1za th-Al\u2082O\u2083 m\u00f4\u017ee by\u0165 prospe\u0161n\u00e1 aj v elektrotechnick\u00fdch aplik\u00e1ci\u00e1ch. Napr\u00edklad keramick\u00e9 roho\u017ee vyroben\u00e9 z tohto materi\u00e1lu sa umiest\u0148uj\u00fa do potrubia spal\u00edn v uho\u013en\u00fdch elektr\u00e1r\u0148ach na ochranu pred opotreben\u00edm; okrem toho je neoddelite\u013enou s\u00fa\u010das\u0165ou izol\u00e1torov, ako aj protipo\u017eiarnych n\u00e1terov.<\/p>\n<p>Tento materi\u00e1l sa vyr\u00e1ba hlavne z nerastu bauxitu. Bauxitov\u00e1 ruda obsahuje gibbsit (Al(OH)\u2083), boehmit (g-AlO(OH)\u2083) a diaspor (a-AlO(OH)\u2083) spolu s ne\u010distotami, ako s\u00fa okrem in\u00e9ho kreme\u0148 a silik\u00e1ty. Po \u0165a\u017ebe zo zeme sa rozomelie na ka\u0161u, ktor\u00e1 obsahuje zmes g-AlO(OH), a-AlO(OH)\u2083 a b-AlO(OH)\u2083. Na z\u00edskanie tohto vz\u00e1cneho miner\u00e1lu sa vykon\u00e1va tavenie v taviacej peci.<\/p>\n<p>Al\u2082O\u2083 je nielen \u00fa\u010dinn\u00fdm br\u00fasivom, ale aj vynikaj\u00facim nosi\u010dom katalyz\u00e1torov. Vyu\u017e\u00edva sa pri r\u00f4znych reakci\u00e1ch, vr\u00e1tane petrochemick\u00fdch, a v\u010faka svojej vysoko rozpustnej \u0161trukt\u00fare je vhodn\u00fd aj na pou\u017eitie ako nosi\u010d enz\u00fdmov. Okrem toho sl\u00fa\u017ei Al\u2082O\u2083 ako z\u00e1kladn\u00e1 surovina vo v\u00fdrobn\u00fdch procesoch keramiky, br\u00fasiv a protipo\u017eiarnych n\u00e1terov.<\/p>\n<h2>c-Al\u2082O\u2083<\/h2>\n<p>Oxid hlinit\u00fd je nenahradite\u013en\u00fd priemyseln\u00fd materi\u00e1l, ktor\u00fd v\u00fdznamne prispel k zlep\u0161eniu kvality \u017eivota a rozvoju spolo\u010dnost\u00ed po celom svete. V\u010faka svojim chemick\u00fdm, tepeln\u00fdm a mechanick\u00fdm vlastnostiam sa oxid hlinit\u00fd \u0161iroko vyu\u017e\u00edva v modernej technol\u00f3gii \u2013 jeho tepeln\u00e1 stabilita prispieva k v\u00fdrobe zliatin hlin\u00edka, ktor\u00e9 zvy\u0161uj\u00fa bezpe\u010dnos\u0165 a \u00fa\u010dinnos\u0165 v automobilovom a elektrotechnickom priemysle, zatia\u013e \u010do jeho tvrdos\u0165 pom\u00e1ha pri v\u00fdrobe rezn\u00fdch n\u00e1strojov alebo br\u00fasnych materi\u00e1lov pre v\u00fdrobcov rezn\u00fdch n\u00e1strojov.<\/p>\n<p>V\u010faka vysokej teplote topenia a n\u00edzkej koeficientu roz\u0165a\u017enosti m\u00e1 hlin\u00edk viacero \u017eiaducich vlastnost\u00ed pre pou\u017eitie vo filtr\u00e1cii vody a chemickom spracovan\u00ed; okrem odolnosti proti kor\u00f3zii a opotrebeniu sa hlin\u00edk d\u00e1 vyu\u017ei\u0165 aj ako elektrick\u00fd izola\u010dn\u00fd materi\u00e1l. Navy\u0161e jeho oxida\u010dn\u00fd stupe\u0148 +3 mu umo\u017e\u0148uje odovzd\u00e1va\u0165 alebo prij\u00edma\u0165 elektr\u00f3ny, \u010d\u00edm umo\u017e\u0148uje prebiehanie r\u00f4znych reakci\u00ed s in\u00fdmi prvkami.<\/p>\n<p>V kombin\u00e1cii so zirkonianom tvor\u00ed oxid hlinit\u00fd jednoduch\u00fd eutektick\u00fd syst\u00e9m, ktor\u00fd si pri r\u00fdchlom ochladen\u00ed pri vy\u0161\u0161\u00edch teplot\u00e1ch zachov\u00e1va tetragon\u00e1lnu \u0161trukt\u00faru \u2013 \u010d\u00edm sa zvy\u0161uje h\u00fa\u017eevnatos\u0165 a z\u00e1rove\u0148 zni\u017euje krehkos\u0165. Keramika z oxidu hlinit\u00e9ho a zirk\u00f3nu je ob\u013e\u00fabenou vo\u013ebou pri v\u00fdrobe polovodi\u010dov\u00fdch zariaden\u00ed; okrem toho oxid hlinit\u00fd zohr\u00e1va k\u013e\u00fa\u010dov\u00fa \u00falohu pri v\u00fdrobe karbidu krem\u00edka (SiC), mimoriadne tvrd\u00e9ho a odoln\u00e9ho materi\u00e1lu vhodn\u00e9ho pre prostredia s vysok\u00fdmi teplotami.<\/p>\n<p>Oxid hlinit\u00fd je chemicky inertn\u00e1 a bezz\u00e1pachov\u00e1 anorganick\u00e1 zl\u00fa\u010denina so vzorcom Al\u2082O\u2083. Tento anorganick\u00fd materi\u00e1l, zn\u00e1my aj pod n\u00e1zvami alum, alundum alebo bauxit, sa m\u00f4\u017ee ozna\u010dova\u0165 aj in\u00fdmi n\u00e1zvami, medzi ktor\u00e9 patria alum, alundum alebo bauxit. V pr\u00edrode sa vyskytuje vo forme kry\u0161t\u00e1lov korundu a tvor\u00ed rub\u00edny a zaf\u00edry, ktor\u00fdch \u017eiariv\u00fd \u010derven\u00fd odtie\u0148 poch\u00e1dza z ne\u010dist\u00f4t chr\u00f3mu, zatia\u013e \u010do modrozelen\u00fd odtie\u0148 poch\u00e1dza z ne\u010dist\u00f4t \u017eeleza, resp. tit\u00e1nu. Oxid hlinit\u00fd sa pou\u017e\u00edva aj ako abraz\u00edvum v br\u00fasnych papieroch, ako zlo\u017eka sklenen\u00fdch smaltov a \u017eiaruvzdorn\u00fdch materi\u00e1lov, ako aj ako d\u00f4le\u017eit\u00fd adsorbent plynov alebo vodnej pary.<\/p>\n<p>Vystavenie p\u00f4sobeniu oxidu hlinit\u00e9ho m\u00f4\u017ee sp\u00f4sobi\u0165 ochorenie p\u013e\u00fac. Pri vd\u00fdchnut\u00ed r\u00e1dioakt\u00edvne zna\u010den\u00e9ho 26Al sa t\u00e1to l\u00e1tka via\u017ee na makrof\u00e1gy v p\u013e\u00facach a hromad\u00ed sa, \u010do m\u00f4\u017ee potenci\u00e1lne vies\u0165 k atrofii bronchiolov alebo mal\u00fdch p\u013e\u00facnych arteriol; okrem toho bolo preuk\u00e1zan\u00e9, \u017ee u potkanov vedie k lymfoidnej hyperpl\u00e1zii a u \u0161kre\u010dkov k fok\u00e1lnym oblastiam lipoidnej pneum\u00f3nie.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-184\" src=\"https:\/\/aluminaceramics.net\/wp-content\/uploads\/2024\/06\/The-Alumina-Structure.jpg\" alt=\"\u0160trukt\u00fara oxidu hlinit\u00e9ho\" width=\"750\" height=\"750\" srcset=\"https:\/\/aluminaceramics.net\/wp-content\/uploads\/2024\/06\/The-Alumina-Structure.jpg 750w, https:\/\/aluminaceramics.net\/wp-content\/uploads\/2024\/06\/The-Alumina-Structure-300x300.jpg 300w, https:\/\/aluminaceramics.net\/wp-content\/uploads\/2024\/06\/The-Alumina-Structure-150x150.jpg 150w, https:\/\/aluminaceramics.net\/wp-content\/uploads\/2024\/06\/The-Alumina-Structure-12x12.jpg 12w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>Alumina is an impressive crystalline form of aluminium oxide with outstanding properties. It boasts low electric conductivity, high strength and [&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-116","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\/116","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=116"}],"version-history":[{"count":3,"href":"https:\/\/aluminaceramics.net\/sk\/wp-json\/wp\/v2\/posts\/116\/revisions"}],"predecessor-version":[{"id":185,"href":"https:\/\/aluminaceramics.net\/sk\/wp-json\/wp\/v2\/posts\/116\/revisions\/185"}],"wp:attachment":[{"href":"https:\/\/aluminaceramics.net\/sk\/wp-json\/wp\/v2\/media?parent=116"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aluminaceramics.net\/sk\/wp-json\/wp\/v2\/categories?post=116"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aluminaceramics.net\/sk\/wp-json\/wp\/v2\/tags?post=116"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}