{"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\/cs\/the-chemical-formula-for-alumina\/","title":{"rendered":"Chemick\u00fd vzorec oxidu hlinit\u00e9ho"},"content":{"rendered":"

Al2O3 je chemick\u00fd vzorec oxidu hlinit\u00e9ho, nejroz\u0161\u00ed\u0159en\u011bj\u0161\u00edho p\u0159irozen\u011b se vyskytuj\u00edc\u00edho oxidu hlinit\u00e9ho v p\u0159\u00edrod\u011b. Z tohoto miner\u00e1lu vznikaj\u00ed krystaly korundu, kter\u00e9 jsou z\u00e1kladem rub\u00edn\u016f a saf\u00edr\u016f s jedine\u010dn\u00fdmi barvami d\u00edky stopov\u00fdm p\u0159\u00edm\u011bs\u00edm, jako je chrom nebo \u017eelezo, p\u0159\u00edtomn\u00fdm v jejich krystalov\u00e9 struktu\u0159e.<\/p>\n

Bezvod\u00fd hydr\u00e1t oxidu hlinit\u00e9ho (AAH) lze vyr\u00e1b\u011bt lou\u017een\u00edm bauxitov\u00e9 rudy sodnou sol\u00ed pomoc\u00ed Bayerova procesu a pozd\u011bji zpracov\u00e1vat kalcinac\u00ed na bezvod\u00fd AAH nebo slinov\u00e1n\u00edm na high-tech keramick\u00e9 v\u00fdrobky.<\/p>\n

Chemick\u00fd vzorec<\/h2>\n

Al2O3 je amfotern\u00ed oxid slo\u017een\u00fd z jednoho atomu hlin\u00edku a dvou atom\u016f kysl\u00edku. Je b\u00edl\u00fd, nem\u00e1 \u017e\u00e1dn\u00fd v\u00fdrazn\u00fd z\u00e1pach, na vzduchu tuhne a v chemick\u00fdch reakc\u00edch funguje jako kyselina i z\u00e1sada. Hlin\u00edk se z\u00edsk\u00e1v\u00e1 z lo\u017eisek bauxitu, kter\u00e1 se nach\u00e1zej\u00ed v tropick\u00fdch a subtropick\u00fdch oblastech, a tak\u00e9 z korundu, kter\u00fd se pou\u017e\u00edv\u00e1 k v\u00fdrob\u011b izol\u00e1tor\u016f zapalovac\u00edch sv\u00ed\u010dek a dal\u0161\u00edch elektrick\u00fdch sou\u010d\u00e1stek; jeho hlavn\u00ed vyu\u017eit\u00ed v\u0161ak spo\u010d\u00edv\u00e1 ve v\u00fdrob\u011b kovov\u00e9ho hlin\u00edku elektrol\u00fdzou.<\/p>\n

Bauxit, kter\u00fd obsahuje p\u0159ibli\u017en\u011b t\u0159etinu sv\u011btov\u00fdch z\u00e1sob hlin\u00edku, se t\u011b\u017e\u00ed vrt\u00e1n\u00edm a odst\u0159elov\u00e1n\u00edm v podzemn\u00edch nebo povrchov\u00fdch dolech a n\u00e1sledn\u011b se sm\u00edch\u00e1 se sodnou sol\u00ed, aby se z n\u011bj vyluhovala ruda. Filtrac\u00ed a sr\u00e1\u017een\u00edm se pak odd\u011bl\u00ed oxid hlinit\u00fd a dal\u0161\u00edm kalcinov\u00e1n\u00edm se d\u00e1le \u010dist\u00ed. Tento kone\u010dn\u00fd produkt, hlinitan sodn\u00fd, se pak pou\u017e\u00edv\u00e1 v pr\u016fmyslu a k v\u00fdrob\u011b \u017e\u00e1ruvzdorn\u00fdch v\u00fdrobk\u016f.<\/p>\n

In\u017een\u00fdrsk\u00e1 keramika vyu\u017e\u00edv\u00e1 k v\u00fdrob\u011b n\u00edzkou elektrickou vodivost zirkonia, odolnost v\u016f\u010di p\u016fsoben\u00ed kyselin a z\u00e1sad, vysokou pevnost a tuhost. Mezi aplikace t\u00e9to keramiky pat\u0159\u00ed vysokoteplotn\u00ed elektrick\u00e9 a nap\u011b\u0165ov\u00e9 izol\u00e1tory, t\u011bsnic\u00ed krou\u017eky pro plynov\u00e9 laserov\u00e9 trubice a laboratorn\u00ed za\u0159\u00edzen\u00ed.<\/p>\n

Hlin\u00edk se pou\u017e\u00edv\u00e1 p\u0159i elektrol\u00fdze k v\u00fdrob\u011b kovov\u00e9ho hlin\u00edku a tvo\u0159\u00ed 90% ve\u0161ker\u00e9ho vyroben\u00e9ho oxidu hlinit\u00e9ho. Slitiny oxidu hlinit\u00e9ho a zirkonia lze nal\u00e9zt tak\u00e9 jako brusn\u00e1 m\u00e9dia pro keramiku, ocel a litinu; jejich velmi hou\u017eevnat\u00e1 struktura m\u00e1 velmi n\u00edzkou \u00farove\u0148 p\u00f3rovitosti, co\u017e z nich \u010din\u00ed \u017e\u00e1dan\u00e1 brusiva.<\/p>\n

Mikrokrystalick\u00fd oxid hlinit\u00fd se vytv\u00e1\u0159\u00ed rozpt\u00fdlen\u00edm submikronov\u00fdch \u010d\u00e1stic prekurzoru oxidu hlinit\u00e9ho, jako je boehmit (Al2O3), ve vodn\u00e9m gelu s peptizuj\u00edc\u00edmi \u010dinidly a p\u0159\u00edpadn\u011b s mal\u00fdm mno\u017estv\u00edm nesklen\u011bn\u00fdch pomocn\u00fdch l\u00e1tek. Po ust\u00e1len\u00ed t\u00e9to sm\u011bsi p\u0159i pokojov\u00e9 teplot\u011b nebo vy\u0161\u0161\u00ed pro slinov\u00e1n\u00ed se semena extrahuj\u00ed p\u0159ed zah\u0159\u00e1t\u00edm v peci na teplotu konverze nebo vy\u0161\u0161\u00ed pro slinovan\u00e9 v\u00fdrobky, kdy se semena odstra\u0148uj\u00ed pomoc\u00ed disperzn\u00edch \u010dinidel nebo zah\u0159\u00edv\u00e1n\u00edm v peci a\u017e do doby, kdy dojde ke konverzi nebo slinov\u00e1n\u00ed, kdy se semena mus\u00ed p\u0159ed extrakc\u00ed v tomto kroku extrahovat disperzn\u00edmi \u010dinidly.<\/p>\n

Fyzik\u00e1ln\u00ed vlastnosti<\/h2>\n

Oxid hlinit\u00fd (Al2O3) je jedn\u00edm ze dvou nejroz\u0161\u00ed\u0159en\u011bj\u0161\u00edch prvk\u016f v zemsk\u00e9 k\u016f\u0159e a tvo\u0159\u00ed pevnou l\u00e1tku bez v\u00fdrazn\u00e9 chuti nebo z\u00e1pachu. P\u0159irozen\u011b se vyskytuje v tropick\u00fdch p\u016fd\u00e1ch zvan\u00fdch laterity a tak\u00e9 v rud\u011b t\u011b\u017een\u00e9 Bayerov\u00fdm procesem a p\u016fsob\u00ed jako elektrick\u00fd izolant s vysokou tepelnou vodivost\u00ed; reaguje s kyselinami a z\u00e1sadami, ale je pova\u017eov\u00e1n za netoxick\u00fd.<\/p>\n

Chemick\u00e1 inertnost oxidu hlinit\u00e9ho z n\u011bj \u010din\u00ed ide\u00e1ln\u00ed materi\u00e1l pro v\u00fdrobu pr\u016fmyslov\u00e9 keramiky. Krystaly korundu tvo\u0159\u00ed z\u00e1klad mnoha drah\u00fdch kamen\u016f, jako jsou rub\u00edny a saf\u00edry, jejich\u017e barvu dod\u00e1v\u00e1 r\u016fzn\u00e9 mno\u017estv\u00ed chromu a p\u0159\u00edm\u011bs\u00ed \u017eeleza v jejich j\u00e1dru. D\u00edky sv\u00e9 tvrdosti a pevnosti se oxid hlinit\u00fd b\u011b\u017en\u011b pou\u017e\u00edv\u00e1 tak\u00e9 jako brusivo na brusn\u00e9 pap\u00edry, zat\u00edmco jeho tepeln\u00e1 stabilita mu umo\u017e\u0148uje odol\u00e1vat zv\u00fd\u0161en\u00fdm teplot\u00e1m, tak\u017ee je vhodn\u00fd pro pou\u017eit\u00ed ve vyzd\u00edvk\u00e1ch vysokoteplotn\u00edch za\u0159\u00edzen\u00ed, jako jsou pece a v\u00fdhn\u011b.<\/p>\n

Plast vyztu\u017een\u00fd sklen\u011bn\u00fdmi vl\u00e1kny (GFRP) se tak\u00e9 \u0161iroce pou\u017e\u00edv\u00e1 k v\u00fdrob\u011b \u017e\u00e1ruvzdorn\u00fdch materi\u00e1l\u016f, le\u0161tic\u00edch a brusn\u00fdch v\u00fdrobk\u016f a k potahov\u00e1n\u00ed titanov\u00fdch pigment\u016f. GFRP vykazuje vynikaj\u00edc\u00ed mechanickou pevnost a odolnost proti od\u011bru a lze jej odl\u00e9vat do tenk\u00fdch i velk\u00fdch d\u00edl\u016f, ani\u017e by se \u010dasem deformoval; d\u00edky sv\u00e9 schopnosti odol\u00e1vat teplu a korozi je nav\u00edc vhodn\u00fd i pro \u0159adu dal\u0161\u00edch pou\u017eit\u00ed.<\/p>\n

Oxid hlinit\u00fd reaguje ve vod\u011b se vzduchem za vzniku iont\u016f Al2+ a OH-, kter\u00e9 se spojuj\u00ed a vytv\u00e1\u0159ej\u00ed na povrchu kovu oxidov\u00fd film, kter\u00fd jej chr\u00e1n\u00ed p\u0159ed dal\u0161\u00ed oxidac\u00ed a tak\u00e9 p\u0159ed korozn\u00edmi \u010diniteli z okoln\u00edho prost\u0159ed\u00ed. Tento proces chr\u00e1n\u00ed materi\u00e1l p\u0159ed dal\u0161\u00ed anodickou oxidac\u00ed a z\u00e1rove\u0148 ho chr\u00e1n\u00ed p\u0159ed dal\u0161\u00edmi korozn\u00edmi hrozbami v jeho okol\u00ed.<\/p>\n

D\u00edky sv\u00e9 chemick\u00e9 inertnosti je oxid hlinit\u00fd odoln\u00fd v\u016f\u010di korozi mnoha chemik\u00e1li\u00ed a \u010dinidel, tak\u017ee je vhodn\u00fd pro aplikace vy\u017eaduj\u00edc\u00ed vysokou \u010distotu a stabilitu, nap\u0159\u00edklad ve farmacii. Krom\u011b toho je oxid hlinit\u00fd d\u00edky sv\u00e9 tepeln\u00e9 stabilit\u011b vynikaj\u00edc\u00edm materi\u00e1lem pro pou\u017eit\u00ed v chromatografick\u00fdch aplikac\u00edch.<\/p>\n

Hlin\u00edk lze kombinovat s kyselinami a z\u00e1sadami a vyr\u00e1b\u011bt tak r\u016fzn\u00e9 vysoce \u010dist\u00e9 materi\u00e1ly, kter\u00e9 mohou slou\u017eit jako suroviny pro r\u016fzn\u00e9 aplikace. Lze jej nap\u0159\u00edklad kalcinovat a vyr\u00e1b\u011bt vysoce \u010di\u0161t\u011bn\u00fd oxid hlinit\u00fd pou\u017e\u00edvan\u00fd p\u0159i v\u00fdrob\u011b \u017e\u00e1ruvzdorn\u00fdch materi\u00e1l\u016f a keramiky nebo jako nosi\u010d katalyz\u00e1tor\u016f; t\u00edmto postupem lze tak\u00e9 vyr\u00e1b\u011bt aktivovan\u00e9 hlin\u00edky s v\u011bt\u0161\u00edm povrchem a vhodn\u011bj\u0161\u00ed strukturou p\u00f3r\u016f.<\/p>\n

Chemick\u00e9 reakce<\/h2>\n

Hlin\u00edk je jedn\u00edm ze dvou nejroz\u0161\u00ed\u0159en\u011bj\u0161\u00edch kov\u016f na Zemi a nach\u00e1z\u00ed se p\u0159edev\u0161\u00edm v tropick\u00fdch p\u016fd\u00e1ch zn\u00e1m\u00fdch jako laterity nebo bauxity. Hlin\u00edk lze extrahovat Bayerov\u00fdm procesem rozpou\u0161t\u011bn\u00edm oxidu hlinit\u00e9ho v roztoku \u017e\u00edrav\u00e9 sody, n\u00e1slednou izolac\u00ed hydroxidu sodn\u00e9ho od nerozpustn\u00e9ho hydroxidu hlinit\u00e9ho a propl\u00e1chnut\u00edm ve\u0161ker\u00e9ho zb\u00fdvaj\u00edc\u00edho vodn\u00e9ho roztoku.<\/p>\n

Hlin\u00edk je zn\u00e1m\u00fd sv\u00fdmi v\u00fdjime\u010dn\u00fdmi vlastnostmi, jako je n\u00edzk\u00e1 elektrick\u00e1 vodivost a odolnost v\u016f\u010di chemick\u00fdm vliv\u016fm, vysok\u00e1 pevnost a extr\u00e9mn\u00ed tvrdost (9 stup\u0148\u016f Mohsovy stupnice). Hlin\u00edk nach\u00e1z\u00ed uplatn\u011bn\u00ed v r\u016fzn\u00fdch pr\u016fmyslov\u00fdch odv\u011btv\u00edch jako surovina pro v\u00fdrobu \u017e\u00e1ruvzdorn\u00fdch v\u00fdrobk\u016f, p\u016fsob\u00ed tak\u00e9 jako katalyz\u00e1tor v n\u011bkter\u00fdch chemick\u00fdch reakc\u00edch a hraje d\u016fle\u017eitou roli p\u0159i \u010di\u0161t\u011bn\u00ed vody, nebo\u0165 pom\u00e1h\u00e1 odstra\u0148ovat organick\u00e9 l\u00e1tky z pitn\u00e9 a odpadn\u00ed vody.<\/p>\n

Hlin\u00edk m\u00e1 orthorombickou t\u011bsn\u011b uspo\u0159\u00e1danou strukturu krystalov\u00e9 m\u0159\u00ed\u017eky tvo\u0159enou ionty kysl\u00edku a ionty hlin\u00edku, kter\u00e9 vypl\u0148uj\u00ed dv\u011b t\u0159etiny p\u0159\u00edslu\u0161n\u00fdch mezer, co\u017e mu zaji\u0161\u0165uje vynikaj\u00edc\u00ed chemickou a kyselinovou odolnost a velkou tepelnou vodivost p\u0159i zv\u00fd\u0161en\u00fdch teplot\u00e1ch.<\/p>\n

D\u00edky velk\u00e9mu povrchu a mechanick\u00e9 pevnosti je oxid hlinit\u00fd \u00fa\u010dinn\u00fdm adsorbentem. Prim\u00e1rn\u011b se pou\u017e\u00edv\u00e1 p\u0159i \u00faprav\u011b vody k odstra\u0148ov\u00e1n\u00ed nebezpe\u010dn\u00fdch organick\u00fdch l\u00e1tek a slou\u010denin zp\u016fsobuj\u00edc\u00edch zbarven\u00ed a z\u00e1pach z dod\u00e1vek pitn\u00e9 vody a tak\u00e9 se \u0161iroce pou\u017e\u00edv\u00e1 jako slo\u017eka p\u0159i v\u00fdrob\u011b \u017e\u00e1ruvzdorn\u00fdch v\u00fdrobk\u016f pro skl\u00e1\u0159sk\u00fd a keramick\u00fd pr\u016fmysl.<\/p>\n

Hlin\u00edk se obecn\u011b nepova\u017euje za extr\u00e9mn\u011b reaktivn\u00ed kov; reaguje v\u0161ak s chlorem, fluorem a bromem za vzniku halogenid\u016f hlin\u00edku(III). Krom\u011b toho je kovov\u00fd hlin\u00edk schopen reagovat s jin\u00fdmi halogeny, jako je chlor, fluor a brom, za vzniku halogenid\u016f hlin\u00edku(III); d\u00e1le podl\u00e9h\u00e1 aluminotermick\u00fdm reakc\u00edm s jin\u00fdmi kovy nebo nekovy, zejm\u00e9na s ho\u0159\u010d\u00edkem a c\u00ednem; je tak\u00e9 zn\u00e1mo, \u017ee reaguje se siln\u00fdmi kyselinami, jako je kyselina s\u00edrov\u00e1 a chlorovod\u00edkov\u00e1; av\u0161ak d\u00edky sv\u00e9mu ochrann\u00e9mu povlaku z oxid\u016f obecn\u011b nereaguje prudce proti jin\u00fdm kyselin\u00e1m; sp\u00ed\u0161e ne\u017e prudce proti jin\u00fdm reakc\u00edm m\u00e1 tendenci v d\u016fsledku t\u011bchto proces\u016f reagovat m\u00e9n\u011b prudce proti jin\u00fdm kyselin\u00e1m.<\/p>\n

Aplikace<\/h2>\n

Hlin\u00edk lze pou\u017e\u00edt i v mnoha dal\u0161\u00edch oblastech mimo v\u00fdrobu hlin\u00edku, mimo jin\u00e9 jako brusivo a p\u0159\u00edsada do keramiky s v\u00fdjime\u010dnou tvrdost\u00ed a odolnost\u00ed proti opot\u0159eben\u00ed. Krom\u011b toho slou\u017e\u00ed jako katalyz\u00e1tor v r\u016fzn\u00fdch chemick\u00fdch reakc\u00edch a poskytuje izola\u010dn\u00ed vlastnosti u\u017eite\u010dn\u00e9 v elektrick\u00fdch za\u0159\u00edzen\u00edch a stavebn\u00edch materi\u00e1lech - d\u00edky biokompatibilit\u011b je oxid hlinit\u00fd ide\u00e1ln\u00ed volbou materi\u00e1lu p\u0159i v\u00fdrob\u011b l\u00e9ka\u0159sk\u00fdch implant\u00e1t\u016f.<\/p>\n

Korund je mimo\u0159\u00e1dn\u011b roz\u0161\u00ed\u0159en\u00fd materi\u00e1l pou\u017e\u00edvan\u00fd k v\u00fdrob\u011b vysoce pevn\u00fdch, ale lehk\u00fdch \u0159ezn\u00fdch n\u00e1stroj\u016f a brusn\u00fdch pap\u00edr\u016f, \u010dasto s charakteristickou tvrdost\u00ed 9 stup\u0148\u016f Mohsovy stupnice - druh\u00fd po diamantu a rub\u00ednu.<\/p>\n

Vysok\u00fd bod t\u00e1n\u00ed oxidu hlinit\u00e9ho z n\u011bj \u010din\u00ed vynikaj\u00edc\u00ed materi\u00e1l pro vyzd\u00edvky pec\u00ed, spaloven a reaktor\u016f r\u016fzn\u00fdch druh\u016f. Obklady z oxidu hlinit\u00e9ho lze dokonce nal\u00e9zt uvnit\u0159 palivov\u00fdch kan\u00e1l\u016f uheln\u00fdch elektr\u00e1ren jako ochranu proti n\u00e1razov\u00fdm sil\u00e1m.<\/p>\n

D\u00edky sv\u00e9 chemick\u00e9 stabilit\u011b na\u0161la korundov\u00e1 keramika skv\u011bl\u00e9 uplatn\u011bn\u00ed jako kyselinovzdorn\u00e1 ob\u011b\u017en\u00e1 kola \u010derpadel a oblo\u017een\u00ed potrub\u00ed; tato keramika odol\u00e1v\u00e1 teplot\u00e1m a\u017e 900 stup\u0148\u016f Celsia a z\u00e1rove\u0148 je vynikaj\u00edc\u00edm abrazivn\u00edm materi\u00e1lem, kter\u00fd lze nal\u00e9zt v pr\u016fmyslov\u00fdch brusivech, jako jsou brusn\u00e9 kotou\u010de a zrnitost.<\/p>\n

Silikonov\u00e1 pry\u017e je d\u016fle\u017eit\u00fdm materi\u00e1lem pou\u017e\u00edvan\u00fdm p\u0159i v\u00fdrob\u011b vysoce odoln\u00fdch pneumatik a pry\u017eov\u00fdch v\u00fdrobk\u016f, jako jsou lepidla a t\u011bsnic\u00ed materi\u00e1ly, se zv\u00fd\u0161enou odolnost\u00ed pneumatik, jako\u017e i p\u0159i zvy\u0161ov\u00e1n\u00ed pevnosti a trvanlivosti betonu, odolnosti sportovn\u00edho vybaven\u00ed proti od\u011bru a ochran\u011b ocelov\u00fdch a hlin\u00edkov\u00fdch konstrukc\u00ed proti korozi.<\/p>\n

A kone\u010dn\u011b, oxid hlinit\u00fd lze pou\u017e\u00edt k v\u00fdrob\u011b \u017e\u00e1ruvzdorn\u00fdch cihel. Krom\u011b toho slou\u017e\u00ed jako ned\u00edln\u00fd materi\u00e1l p\u0159i v\u00fdrob\u011b tepeln\u00e9 izolace budov a jin\u00fdch konstrukc\u00ed.<\/p>\n

Pr\u00e1\u0161kov\u00fd oxid hlinit\u00fd m\u016f\u017ee m\u00edt podobu b\u011blav\u00fdch zrnek nebo hedv\u00e1bn\u011b b\u00edl\u00e9ho, hust\u00e9ho pr\u00e1\u0161ku. P\u0159id\u00e1n\u00edm oxidu zirkoni\u010dit\u00e9ho nebo karbidu k\u0159em\u00edku lze vytvo\u0159it pr\u016fsvitn\u00fd oxid hlinit\u00fd. Oxid hlinit\u00fd se \u010dasto pou\u017e\u00edv\u00e1 v kovozpracuj\u00edc\u00edch aplikac\u00edch k v\u00fdrob\u011b povlak\u016f AlZnO pou\u017e\u00edvan\u00fdch p\u0159i v\u00fdrob\u011b skla za vysok\u00fdch teplot, jako\u017e i k dal\u0161\u00edm skl\u00e1\u0159sk\u00fdm a keramick\u00fdm technick\u00fdm \u00fa\u010del\u016fm; nav\u00edc slou\u017e\u00ed jako vynikaj\u00edc\u00ed zpomalova\u010d ho\u0159en\u00ed, kter\u00fd zpomaluje \u0161\u00ed\u0159en\u00ed po\u017e\u00e1ru v materi\u00e1lech.<\/p>\n

\"Chemick\u00fd<\/p>","protected":false},"excerpt":{"rendered":"

Al2O3 is the chemical formula for alumina, the most abundant naturally-occurring aluminum oxide found in nature. Corundum crystals form from […]<\/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\/cs\/wp-json\/wp\/v2\/posts\/125","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=125"}],"version-history":[{"count":3,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/posts\/125\/revisions"}],"predecessor-version":[{"id":194,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/posts\/125\/revisions\/194"}],"wp:attachment":[{"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/media?parent=125"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/categories?post=125"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aluminaceramics.net\/cs\/wp-json\/wp\/v2\/tags?post=125"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}