{"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\/cs\/the-alumina-structure\/","title":{"rendered":"Struktura oxidu hlinit\u00e9ho"},"content":{"rendered":"

Oxid hlinit\u00fd je p\u016fsobiv\u00e1 krystalick\u00e1 forma oxidu hlinit\u00e9ho s vynikaj\u00edc\u00edmi vlastnostmi. Vyzna\u010duje se n\u00edzkou elektrickou vodivost\u00ed, vysokou pevnost\u00ed a extr\u00e9mn\u00ed tvrdost\u00ed na Mohsov\u011b stupnici; nav\u00edc m\u00e1 velkou akumula\u010dn\u00ed kapacitu.<\/p>\n

A\u010dkoli jsou vlastnosti oxidu hlinit\u00e9ho p\u016fsobiv\u00e9, jeho mikrostruktura je st\u00e1le p\u0159edm\u011btem diskus\u00ed. D\u016fvodem jsou neshody ohledn\u011b um\u00edst\u011bn\u00ed kationt\u016f v jeho objemov\u00e9 jednotkov\u00e9 bu\u0148ce a p\u0159\u00edtomnosti interstici\u00e1ln\u00edho vod\u00edku.<\/p>\n

g-Al2O3<\/h2>\n

Struktura oxidu hlinit\u00e9ho g-Al2O3 je kl\u00ed\u010dov\u00e1 pro vysv\u011btlen\u00ed jeho reaktivity. Vyzna\u010duje se pln\u011b kysl\u00edkem zakon\u010denou povrchovou vrstvou a 53% kontrahovan\u00fdmi dvojit\u00fdmi Al vrstvami pod n\u00ed, ob\u011b pln\u011b zakon\u010den\u00e9 kysl\u00edkem. P\u0159i vystaven\u00ed vlhkosti m\u016f\u017ee tvo\u0159it bu\u010f aktivn\u00ed oxid hlinit\u00fd (g-Al(OH)3), nebo \u010d\u00e1ste\u010dn\u011b hydroxylovan\u00e9 hlin\u00edky, jako je g-Al2O3-c, kter\u00e9 maj\u00ed odli\u0161n\u00e9 reaktivn\u00ed vlastnosti v d\u016fsledku strukturn\u00edch rozd\u00edl\u016f mezi nimi.<\/p>\n

Studie krystalov\u00e9 struktury g-Al2O3 byly provedeny pomoc\u00ed selektivn\u00ed plo\u0161n\u00e9 elektronov\u00e9 difrakce (SAED) a pr\u00e1\u0161kov\u00e9 rentgenov\u00e9 difrakce (XRD). Anal\u00fdza SAED nazna\u010duje, \u017ee p\u0159evl\u00e1daj\u00edc\u00edmi strukturn\u00edmi defekty jsou antif\u00e1zov\u00e9 hranice na m\u0159\u00ed\u017ekov\u00fdch rovin\u00e1ch, kter\u00e9 vedou k posun\u016fm subm\u0159\u00ed\u017eky; jejich p\u0159esn\u00e1 povaha v\u0161ak z\u016fst\u00e1v\u00e1 nezn\u00e1m\u00e1.<\/p>\n

Zkoum\u00e1n\u00ed struktur g-Al2O3 odhalilo, \u017ee konzervativn\u00ed i nekonzervativn\u00ed antif\u00e1zov\u00e9 hranice (APB) mohou v z\u00e1vislosti na sv\u00e9m typu zp\u016fsobit posuny v um\u00edst\u011bn\u00ed bu\u010f kationtov\u00fdch m\u00edst, nebo pr\u00e1zdn\u00fdch oktaedrick\u00fdch m\u00edst; jejich p\u0159\u00edtomnost nav\u00edc ovliv\u0148uje i stabilitu krystalick\u00e9 struktury krystal\u016f oxidu hlinit\u00e9ho.<\/p>\n

Tyto nekonzervativn\u00ed APB maj\u00ed velk\u00fd vliv na strukturn\u00ed vlastnosti g-Al2O3. Mohou m\u011bnit polohu kationt\u016f a\u017e o 0,2, resp. 0,45 pro ka\u017ed\u00fd APB, p\u0159i\u010dem\u017e pro vytvo\u0159en\u00ed specifick\u00fdch vektor\u016f posunu jsou zapot\u0159eb\u00ed dal\u0161\u00ed APB.<\/p>\n

Nekonzervativn\u00ed APB lze generovat pomoc\u00ed r\u016fzn\u00fdch mechanism\u016f, v\u010detn\u011b jednoduch\u00fdch klouzav\u00fdch a rota\u010dn\u00edch hranic. Tyto mechanismy vytv\u00e1\u0159ej\u00ed r\u016fzn\u00e9 modely mikrostruktury, kter\u00e9 vedou k r\u016fzn\u00fdm reaktivit\u00e1m oxidu hlinit\u00e9ho; pochopen\u00ed jeho struktury je nezbytn\u00e9 pro \u00fa\u010dinnou manipulaci s jeho reaktivitou a tepelnou stabilitou.<\/p>\n

d-Al2O3<\/h2>\n

Oxid hlinit\u00fd (oxid hlinit\u00fd(III)) je slou\u010denina tvo\u0159en\u00e1 dv\u011bma atomy hlin\u00edku a t\u0159emi atomy kysl\u00edku ve stejn\u00e9m pom\u011bru, kter\u00e1 se pou\u017e\u00edv\u00e1 jako brusivo a \u017e\u00e1ruvzdorn\u00fd materi\u00e1l a je nezbytn\u00e1 p\u0159i v\u00fdrob\u011b kovov\u00e9ho hlin\u00edku. Oxid hlinit\u00fd m\u00e1 r\u016fzn\u00e9 fyzik\u00e1ln\u00ed a chemick\u00e9 vlastnosti, d\u00edky nim\u017e se snadno vyr\u00e1b\u00ed do r\u016fzn\u00fdch v\u00fdrobk\u016f s rozmanit\u00fdm designem a z\u00e1rove\u0148 dob\u0159e odol\u00e1v\u00e1 korozi a opot\u0159eben\u00ed. Stal se jednou z hlavn\u00edch slo\u017eek p\u0159i v\u00fdrob\u011b tohoto element\u00e1rn\u00edho kovu. Lze jej rovn\u011b\u017e nal\u00e9zt jako sou\u010d\u00e1st mnoha p\u0159\u00edpravk\u016f pou\u017e\u00edvan\u00fdch ve v\u00fdrobn\u00edm procesu p\u0159i v\u00fdrob\u011b kovov\u00e9ho hlin\u00edku. Hraje tak\u00e9 ned\u00edlnou roli ve v\u00fdrobn\u00edm procesu a jeho v\u00fdroba je kl\u00ed\u010dov\u00e1 pro samotnou v\u00fdrobu tohoto element\u00e1rn\u00edho kovu!<\/p>\n

V pec\u00edch Higginsova typu se p\u0159i teplot\u011b 1350-1550 \u00b0C vytv\u00e1\u0159\u00ed struktura oxidu hlinit\u00e9ho, zat\u00edmco vodou chlazen\u00e9 ocelov\u00e9 nebo uhl\u00edkov\u00e9 pl\u00e1tovan\u00e9 n\u00e1doby s chlazen\u00fdmi ocelov\u00fdmi nebo uhl\u00edkov\u00fdmi pl\u00e1tovan\u00fdmi n\u00e1dobami slou\u017e\u00ed k jeho rychl\u00e9mu ochlazen\u00ed a krystalizaci p\u0159ed vylit\u00edm roztaven\u00e9ho materi\u00e1lu pro rychlou krystalizaci a rychl\u00e9 ochlazen\u00ed taveniny. Jakmile dojde k ochlazen\u00ed, hrub\u011b krystalick\u00fd oxid hlinit\u00fd se rozdrt\u00ed pro pou\u017eit\u00ed ve slinut\u00fdch materi\u00e1lech s vysokou hustotou jako z\u00e1klad slinut\u00fdch materi\u00e1l\u016f s vysokou hustotou ur\u010den\u00fdch speci\u00e1ln\u011b pro n\u00e1ro\u010dn\u00e1 prost\u0159ed\u00ed nebo aplikace.<\/p>\n

Hlin\u00edk se d\u00edky sv\u00fdm jedine\u010dn\u00fdm fyzik\u00e1ln\u00edm a chemick\u00fdm vlastnostem vyzna\u010duje v\u00fdjime\u010dnou odolnost\u00ed proti korozi a opot\u0159eben\u00ed, tak\u017ee je vhodn\u00fd pro pou\u017eit\u00ed v n\u00e1ro\u010dn\u00fdch podm\u00ednk\u00e1ch, jako je pr\u016fzkum lo\u017eisek ropy a zemn\u00edho plynu, v\u00fdroba automobil\u016f a letadel, z\u00e1vody na zpracov\u00e1n\u00ed chemik\u00e1li\u00ed a n\u00e1dr\u017ee na skladov\u00e1n\u00ed chemik\u00e1li\u00ed. Krom\u011b toho lze tyto materi\u00e1ly vyu\u017e\u00edt tak\u00e9 p\u0159i v\u00fdrob\u011b \u0159ezn\u00fdch a brusn\u00fdch n\u00e1stroj\u016f se zv\u00fd\u0161en\u00fdmi po\u017eadavky na odolnost proti ot\u011bru.<\/p>\n

Hlin\u00edk m\u00e1 nejen vynikaj\u00edc\u00ed odolnost proti korozi a opot\u0159eben\u00ed, ale d\u00edky sv\u00e9 n\u00edzk\u00e9 tepeln\u00e9 vodivosti a vysok\u00e9mu bodu t\u00e1n\u00ed je tak\u00e9 ide\u00e1ln\u00ed pro v\u00fdrobu tepeln\u00fdch izolac\u00ed a dal\u0161\u00edch tepeln\u011b odoln\u00fdch sou\u010d\u00e1st\u00ed. Jeho n\u00edzk\u00e1 hustota nav\u00edc usnad\u0148uje v\u00fdrobu, proto\u017ee z n\u011bj lze snadno vytv\u00e1\u0159et r\u016fzn\u00e9 tvary.<\/p>\n

Hlin\u00edk m\u00e1 atomovou strukturu p\u0159ipom\u00ednaj\u00edc\u00ed t\u011bsn\u011b uspo\u0159\u00e1danou hexagon\u00e1ln\u00ed krystalovou soustavu, kde jsou ionty kysl\u00edku dr\u017eeny pohromad\u011b kovalentn\u00edmi vazbami vytvo\u0159en\u00fdmi mezi jejich oktaedrick\u00fdmi centry. Ionty hlin\u00edku zauj\u00edmaj\u00ed dv\u011b t\u0159etiny t\u011bchto mezer, zat\u00edmco jejich vlastn\u00ed centra zauj\u00edmaj\u00ed jednu t\u0159etinu. V d\u016fsledku toho se jedn\u00e1 o extr\u00e9mn\u011b \u017e\u00e1ruvzdorn\u00fd materi\u00e1l s n\u00edzkou elektrickou vodivost\u00ed.<\/p>\n

Kovov\u00fd hlin\u00edk siln\u011b reaguje se vzdu\u0161n\u00fdm kysl\u00edkem, tak\u017ee se na jeho povrchu vytv\u00e1\u0159\u00ed tenk\u00e1 vrstva oxidu hlinit\u00e9ho, kter\u00e1 zabra\u0148uje dal\u0161\u00ed oxidaci. Tento proces se naz\u00fdv\u00e1 eloxov\u00e1n\u00ed a b\u011b\u017en\u011b se pou\u017e\u00edv\u00e1 u mnoha hlin\u00edkov\u00fdch slitin, aby se zv\u00fd\u0161ila odolnost proti korozi a z\u00e1rove\u0148 se vytvo\u0159il hlad\u0161\u00ed a tvrd\u0161\u00ed povrch, kter\u00fd zvy\u0161uje pevnost v tahu.<\/p>\n

th-Al2O3<\/h2>\n

Oxid hlinit\u00fd (Al2O3) je anorganick\u00e1 chemick\u00e1 slou\u010denina s chemick\u00fdm vzorcem Al2O3, kter\u00e1 m\u00e1 \u0161irok\u00e9 vyu\u017eit\u00ed v nejr\u016fzn\u011bj\u0161\u00edch pr\u016fmyslov\u00fdch odv\u011btv\u00edch. Oxid hlinit\u00fd se skl\u00e1d\u00e1 z atom\u016f hlin\u00edku a kysl\u00edku v\u00e1zan\u00fdch v hexagon\u00e1ln\u00ed krystalov\u00e9 struktu\u0159e s t\u011bsn\u00fdm uspo\u0159\u00e1d\u00e1n\u00edm (hcp) a je jednou z nejobl\u00edben\u011bj\u0161\u00edch slou\u010denin hlin\u00edku pou\u017e\u00edvan\u00fdch v sou\u010dasnosti; v\u00fdroba, taven\u00ed a protipo\u017e\u00e1rn\u00ed ochrana jsou kl\u00ed\u010dov\u00fdmi aplikacemi pro pou\u017eit\u00ed oxidu hlinit\u00e9ho, stejn\u011b jako mnoho jeho surovin, jako jsou chemik\u00e1lie, sklo a keramick\u00e9 v\u00fdrobn\u00ed procesy vyu\u017e\u00edvaj\u00edc\u00ed jeho vlastnosti, kter\u00e9 z oxidu hlinit\u00e9ho \u010din\u00ed nepostradateln\u00fd materi\u00e1l.<\/p>\n

Struktura th-Al2O3 se vyzna\u010duje vysok\u00fdm specifick\u00fdm povrchem a t\u011bsn\u00fdm rozd\u011blen\u00edm velikosti p\u00f3r\u016f, co\u017e z n\u011bj \u010din\u00ed vysoce cen\u011bn\u00fd materi\u00e1l pro nosi\u010de katalyz\u00e1tor\u016f, u nich\u017e jeho p\u00f3ry hraj\u00ed ned\u00edlnou roli p\u0159i podpo\u0159e jejich funk\u010dnosti. Al2O3 je tak\u00e9 vynikaj\u00edc\u00edm abrazivem, co\u017e z n\u011bj \u010din\u00ed z\u00e1kladn\u00ed slo\u017eku \u0159ezn\u00fdch n\u00e1stroj\u016f a dal\u0161\u00edch abrazivn\u00edch aplikac\u00ed. D\u00edky sv\u00e9 krystalick\u00e9 struktu\u0159e odol\u00e1v\u00e1 th-Al2O3 vysok\u00fdm teplot\u00e1m, zat\u00edmco jeho \u010detn\u00e9 p\u00f3ry umo\u017e\u0148uj\u00ed tvorbu krystal\u016f oxidu hlinit\u00e9ho. F\u00e1ze th-Al2O3 m\u016f\u017ee b\u00fdt tak\u00e9 v\u00fdhodn\u00e1 pro elektrotechnick\u00e9 aplikace. Nap\u0159\u00edklad keramick\u00e9 roho\u017ee vyroben\u00e9 z tohoto materi\u00e1lu se umis\u0165uj\u00ed do potrub\u00ed spalin uheln\u00fdch elektr\u00e1ren, aby chr\u00e1nily p\u0159ed opot\u0159eben\u00edm; krom\u011b toho je ned\u00edlnou sou\u010d\u00e1st\u00ed izol\u00e1tor\u016f a tak\u00e9 neho\u0159lav\u00fdch n\u00e1t\u011br\u016f.<\/p>\n

Tento materi\u00e1l se vyr\u00e1b\u00ed p\u0159edev\u0161\u00edm z miner\u00e1lu bauxitu. Bauxitov\u00e1 ruda obsahuje mimo jin\u00e9 gibbit (Al(OH)3), boehmit (g-AlO(OH)3) a diaspor (a-AlO(OH)3) spolu s ne\u010distotami, jako jsou k\u0159emen a k\u0159emi\u010ditany. Po vyt\u011b\u017een\u00ed ze zem\u011b se rozemele na ka\u0161i, kter\u00e1 obsahuje sm\u011bs g-AlO(OH), a-AlO(OH)3 a b-AlO(OH)3. K z\u00edsk\u00e1n\u00ed tohoto vz\u00e1cn\u00e9ho nerostu doch\u00e1z\u00ed taven\u00edm v tavic\u00ed peci.<\/p>\n

Al2O3 je v\u00edce ne\u017e jen \u00fa\u010dinn\u00e9 abrazivo; je tak\u00e9 vynikaj\u00edc\u00edm nosi\u010dem katalyz\u00e1tor\u016f. Pou\u017e\u00edv\u00e1 se pro r\u016fzn\u00e9 reakce v\u010detn\u011b petrochemick\u00fdch a d\u00edky sv\u00e9 vysoce rozpustn\u00e9 struktu\u0159e je vhodn\u00fd i pro podporu enzym\u016f. Krom\u011b toho slou\u017e\u00ed Al2O3 jako ned\u00edln\u00e1 surovina p\u0159i v\u00fdrob\u011b keramiky, brusiva a ohnivzdorn\u00fdch n\u00e1t\u011br\u016f.<\/p>\n

c-Al2O3<\/h2>\n

Hlin\u00edk je nepostradateln\u00fd pr\u016fmyslov\u00fd materi\u00e1l, kter\u00fd v\u00fdznamn\u011b p\u0159isp\u011bl ke zlep\u0161en\u00ed \u017eivota a spole\u010dnosti na cel\u00e9m sv\u011bt\u011b. D\u00edky sv\u00fdm chemick\u00fdm, tepeln\u00fdm a mechanick\u00fdm vlastnostem se oxid hlinit\u00fd hojn\u011b vyu\u017e\u00edv\u00e1 v modern\u00edch technologi\u00edch - p\u0159isp\u00edv\u00e1 svou tepelnou stabilitou k v\u00fdrob\u011b hlin\u00edkov\u00fdch slitin, kter\u00e9 zvy\u0161uj\u00ed bezpe\u010dnost a \u00fa\u010dinnost pro pou\u017eit\u00ed v automobilov\u00e9m pr\u016fmyslu a elektrotechnice, zat\u00edmco jeho tvrdost pom\u00e1h\u00e1 vytv\u00e1\u0159et \u0159ezn\u00e9 n\u00e1stroje nebo brusn\u00e9 materi\u00e1ly pro pou\u017eit\u00ed v\u00fdrobci \u0159ezn\u00fdch n\u00e1stroj\u016f.<\/p>\n

Proto\u017ee se hlin\u00edk vyzna\u010duje vysok\u00fdm bodem t\u00e1n\u00ed a n\u00edzk\u00fdm koeficientem rozta\u017enosti, m\u016f\u017ee se pochlubit n\u011bkolika \u017e\u00e1douc\u00edmi vlastnostmi pro pou\u017eit\u00ed ve filtraci vody a v aplikac\u00edch pro zpracov\u00e1n\u00ed chemik\u00e1li\u00ed, je odoln\u00fd proti korozi a opot\u0159eben\u00ed a lze jej pou\u017e\u00edt i jako elektrick\u00fd izola\u010dn\u00ed materi\u00e1l. Jeho oxida\u010dn\u00ed stav +3 nav\u00edc umo\u017e\u0148uje odevzd\u00e1vat nebo p\u0159ij\u00edmat elektrony, co\u017e umo\u017e\u0148uje r\u016fzn\u00e9 reakce s jin\u00fdmi prvky.<\/p>\n

V kombinaci se zirkonem tvo\u0159\u00ed oxid hlinit\u00fd jednoduch\u00fd eutektick\u00fd syst\u00e9m, kter\u00fd si p\u0159i kalen\u00ed za vy\u0161\u0161\u00edch teplot zachov\u00e1v\u00e1 tetragon\u00e1ln\u00ed strukturu - zvy\u0161uje hou\u017eevnatost a z\u00e1rove\u0148 sni\u017euje k\u0159ehkost. Keramika z oxidu hlinit\u00e9ho a zirkonia je obl\u00edbenou volbou pro v\u00fdrobu polovodi\u010dov\u00fdch za\u0159\u00edzen\u00ed; krom\u011b toho hraje oxid hlinit\u00fd ned\u00edlnou roli p\u0159i v\u00fdrob\u011b karbidu k\u0159em\u00edku (SiC), extr\u00e9mn\u011b tvrd\u00e9ho a odoln\u00e9ho materi\u00e1lu vhodn\u00e9ho do prost\u0159ed\u00ed s vysok\u00fdmi teplotami.<\/p>\n

Chemicky inertn\u00ed oxid hlinit\u00fd bez z\u00e1pachu je anorganick\u00e1 slou\u010denina se vzorcem Al2O3. Tento anorganick\u00fd materi\u00e1l, ozna\u010dovan\u00fd tak\u00e9 jako hlin\u00edk, alundum nebo bauxit, m\u016f\u017ee b\u00fdt zn\u00e1m\u00fd i pod jin\u00fdmi n\u00e1zvy, v\u010detn\u011b Alum, Alundum nebo Bauxite. V p\u0159\u00edrod\u011b se vyskytuje v podob\u011b krystal\u016f korundu a tvo\u0159\u00ed rub\u00edny a saf\u00edry, jejich\u017e z\u00e1\u0159iv\u011b \u010derven\u00fd odst\u00edn poch\u00e1z\u00ed z p\u0159\u00edm\u011bs\u00ed chromu, zat\u00edmco modrozelen\u00fd odst\u00edn z p\u0159\u00edm\u011bs\u00ed \u017eeleza, resp. titanu. Hlin\u00edk se pou\u017e\u00edv\u00e1 tak\u00e9 jako brusivo pro pou\u017eit\u00ed jako smirkov\u00fd pap\u00edr a jako p\u0159\u00edsada do \u017e\u00e1ruvzdorn\u00fdch skeln\u00fdch smalt\u016f a tak\u00e9 jako d\u016fle\u017eit\u00fd adsorbent proti plyn\u016fm nebo adsorbent vodn\u00edch par.<\/p>\n

Vystaven\u00ed oxidu hlinit\u00e9mu m\u016f\u017ee zp\u016fsobit onemocn\u011bn\u00ed plic. P\u0159i vdechov\u00e1n\u00ed radioaktivn\u011b zna\u010den\u00e9ho 26Al se v\u00e1\u017ee na makrof\u00e1gy v plic\u00edch a hromad\u00ed se, co\u017e m\u016f\u017ee v\u00e9st k atrofick\u00fdm bronchiol\u016fm nebo mal\u00fdm plicn\u00edm arteriol\u00e1m; d\u00e1le bylo prok\u00e1z\u00e1no, \u017ee vede k lymfoidn\u00ed hyperplazii u potkan\u016f a k ohniskov\u00fdm oblastem lipoidn\u00ed pneumonie u k\u0159e\u010dk\u016f.<\/p>\n

\"Struktura<\/p>","protected":false},"excerpt":{"rendered":"

Alumina is an impressive crystalline form of aluminium oxide with outstanding properties. It boasts low electric conductivity, high strength and […]<\/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\/cs\/wp-json\/wp\/v2\/posts\/116","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=116"}],"version-history":[{"count":3,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/posts\/116\/revisions"}],"predecessor-version":[{"id":185,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/posts\/116\/revisions\/185"}],"wp:attachment":[{"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/media?parent=116"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/categories?post=116"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/tags?post=116"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}