Zirk\u00f3nia pon\u00faka pokro\u010dil\u00e9 materi\u00e1lov\u00e9 rie\u0161enia pre \u0161irok\u00fa \u0161k\u00e1lu priemyseln\u00fdch aplik\u00e1ci\u00ed. Rozmanitos\u0165 zlo\u017eenia ZTA, od kompozitn\u00e9ho z\u00e1zraku po odoln\u00e9 vlastnosti Ce-TZP, poskytuje vysoko v\u00fdkonn\u00e9 rie\u0161enia, ktor\u00e9 pokr\u00fdvaj\u00fa cel\u00fd rad priemyseln\u00fdch potrieb.<\/p>\n
Mechanick\u00e9 vlastnosti adit\u00edvne vyr\u00e1banej zirk\u00f3novej keramiky m\u00f4\u017ee ovplyvni\u0165 mno\u017estvo faktorov vr\u00e1tane pomeru surovej suspenzie, p\u00f3rovitosti a aglomer\u00e1tov, spojenia medzi vrstvami a zmr\u0161tenia.<\/p>\n
Keramick\u00e9 bloky s\u00fa \u010doraz ob\u013e\u00fabenej\u0161ou vo\u013ebou pre zubn\u00e9 n\u00e1hrady, preto\u017ee s\u00fa pevnej\u0161ie a odolnej\u0161ie ako in\u00e9 v\u00fdpl\u0148ov\u00e9 materi\u00e1ly. Keramick\u00e9 bloky sa m\u00f4\u017eu pochv\u00e1li\u0165 aj ni\u017e\u0161\u00edm koeficientom tepelnej roz\u0165a\u017enosti - to znamen\u00e1, \u017ee sa neroz\u0165ahuj\u00fa ani nezmen\u0161uj\u00fa pri kol\u00edsan\u00ed teploty, tak\u017ee s\u00fa ide\u00e1lne na pou\u017eitie v oblastiach, ktor\u00e9 s\u00fa vystaven\u00e9 teplotn\u00fdm v\u00fdkyvom, ako s\u00fa korunky a fazety. Okrem toho sa keramick\u00e9 bloky \u010distia \u013eah\u0161ie ako in\u00e9 materi\u00e1ly, \u010do je \u010fal\u0161\u00ed faktor, ktor\u00fd rob\u00ed keramiku atrakt\u00edvnou vo\u013ebou v zubn\u00fdch aplik\u00e1ci\u00e1ch, ktor\u00e9 vy\u017eaduj\u00fa odolnos\u0165.<\/p>\n
Celokeramick\u00e9 prot\u00e9zy zhotoven\u00e9 pomocou CAD\/CAM m\u00f4\u017eu pacientom poskytn\u00fa\u0165 dlhotrvaj\u00face a kr\u00e1sne v\u00fdsledky, ale nie v\u0161etky keramiky s\u00fa rovnak\u00e9. Niektor\u00e9 druhy keramiky maj\u00fa lep\u0161iu biokompatibilitu a estetiku ako in\u00e9, preto je k\u013e\u00fa\u010dov\u00fd v\u00fdber ide\u00e1lneho materi\u00e1lu pre individu\u00e1lne potreby ka\u017ed\u00e9ho pacienta. Disilik\u00e1t l\u00edtia a zirk\u00f3n s\u00fa v s\u00fa\u010dasnosti dve ob\u013e\u00faben\u00e9 vo\u013eby pri pou\u017eit\u00ed na v\u00fdpl\u0148ov\u00e9 o\u0161etrenie.<\/p>\n
S pokrokom v technol\u00f3gii CAD\/CAM v\u0161ak maj\u00fa zubn\u00ed lek\u00e1ri k dispoz\u00edcii viac mo\u017enost\u00ed. ZrO (ytriom stabilizovan\u00fd zirk\u00f3n) je extr\u00e9mne tvrd\u00fd materi\u00e1l s jedn\u00fdmi z najvy\u0161\u0161\u00edch mechanick\u00fdch vlastnost\u00ed, ak\u00e9 boli kedy zaznamenan\u00e9 u dent\u00e1lnej keramiky; m\u00e1 pevnos\u0165 v ohybe a\u017e 100 MPa, \u010do znamen\u00e1, \u017ee odol\u00e1va zlomenin\u00e1m \u00fa\u010dinnej\u0161ie ako korunky na b\u00e1ze PFM alebo kovov. Okrem toho monolitick\u00fd ZrO neobsahuje zranite\u013en\u00e9 vrstvy, ktor\u00e9 ho sp\u00e1jaj\u00fa s podkladov\u00fdmi materi\u00e1lmi, ako je zlato alebo porcel\u00e1nov\u00e9 podkladov\u00e9 materi\u00e1ly, \u010do umo\u017e\u0148uje v\u00fdrobu prostredn\u00edctvom syst\u00e9mov CAD\/CAM.<\/p>\n
Keramika ZTA je pokro\u010dil\u00fd hybridn\u00fd materi\u00e1l z tvrden\u00e9ho oxidu zirkoni\u010dit\u00e9ho, ktor\u00fd sa m\u00f4\u017ee pochv\u00e1li\u0165 v\u00fdhodami oboch materi\u00e1lov. Hoci m\u00e1 st\u00e1le vynikaj\u00facu odolnos\u0165 proti oteru a zv\u00fd\u0161en\u00fa tvrdos\u0165\/h\u00fa\u017eevnatos\u0165 pre vy\u0161\u0161\u00ed v\u00fdkon a dlh\u0161iu \u017eivotnos\u0165, jeho zirk\u00f3nom tvrden\u00e1 \u0161trukt\u00fara d\u00e1va ZTA vynikaj\u00facu odolnos\u0165 proti kor\u00f3zii, \u010do mu umo\u017e\u0148uje odol\u00e1va\u0165 prostrediam, ktor\u00e9 by zni\u010dili in\u00e9 keramiky.<\/p>\n
Keramick\u00e9 hriadele ZTA vyroben\u00e9 z oxidu hlinit\u00e9ho a zirk\u00f3nu maj\u00fa najvy\u0161\u0161iu medzu klzu spomedzi v\u0161etk\u00fdch modern\u00fdch priemyseln\u00fdch keram\u00edk, \u010do im umo\u017e\u0148uje odol\u00e1va\u0165 vy\u0161\u0161\u00edm teplot\u00e1m po dlh\u0161iu dobu, k\u00fdm ned\u00f4jde k poruche. V\u010faka tejto v\u00fdhode s\u00fa hriadele ZTA obzvl\u00e1\u0161\u0165 vhodn\u00e9 na pou\u017eitie v mechanick\u00fdch zariadeniach, kde tlak opotrebenia a \u0165ahu \u010dasom sp\u00f4sob\u00ed po\u0161kodenie \u00fanavou z nam\u00e1hania.<\/p>\n
Zirk\u00f3n s pridan\u00fdm ytriom je ove\u013ea pevnej\u0161\u00ed ako \u0161tandardn\u00fd oxid hlinit\u00fd a nitrid krem\u00edka, \u010do mu zabezpe\u010duje desa\u0165n\u00e1sobne zv\u00fd\u0161en\u00fa odolnos\u0165 proti n\u00e1razu. Ak predmet naraz\u00ed na keramick\u00fd hriade\u013e ZTA, jeho zirk\u00f3nov\u00e9 inkl\u00fazie p\u00f4sobia ako mal\u00e9 bari\u00e9ry, ktor\u00e9 absorbuj\u00fa a rozpt\u00fdlia energiu sk\u00f4r, ako sa v jeho \u0161trukt\u00fare vytvoria trhliny.<\/p>\n
Keramick\u00e9 r\u00farky ZTA maj\u00fa cel\u00fd rad n\u00e1ro\u010dn\u00fdch aplik\u00e1ci\u00ed v stroj\u00e1rstve, \u017eiaruvzdornom, chemickom a metalurgickom priemysle. Vysok\u00e1 odolnos\u0165 vo\u010di vysok\u00fdm teplot\u00e1m, kyselin\u00e1m a z\u00e1sad\u00e1m v kombin\u00e1cii s vynikaj\u00facou tvrdos\u0165ou a h\u00fa\u017eevnatos\u0165ou z nich rob\u00ed ide\u00e1lny sp\u00f4sob prepravy chemick\u00fdch kvapal\u00edn alebo ako izola\u010dn\u00e9 ochrann\u00e9 obaly na ich prepravu. Navy\u0161e s\u00fa biokompatibiln\u00e9, netoxick\u00e9 a bez kontaminantov - ide\u00e1lne na pou\u017eitie v medic\u00edne a \u017eiaruvzdorn\u00fdch materi\u00e1loch!<\/p>\n
Keramick\u00fd materi\u00e1l zirk\u00f3nia je jedn\u00fdm z najtvrd\u0161\u00edch keramick\u00fdch materi\u00e1lov na trhu, ktor\u00fd poskytuje v\u00fdnimo\u010dn\u00fa odolnos\u0165 proti oderu a opotrebovaniu\/pevnosti a funguje aj v prev\u00e1dzkov\u00fdch prostrediach, v ktor\u00fdch to nedok\u00e1\u017eu plasty, kovy a in\u00e1 keramika. Zirk\u00f3nium mo\u017eno n\u00e1js\u0165 v aplik\u00e1ci\u00e1ch vr\u00e1tane kon\u0161truk\u010dn\u00fdch komponentov, puzdier, puzdier piestov vodiacich izol\u00e1torov.<\/p>\n
SEM sn\u00edmky lomov\u00fdch pl\u00f4ch oxidu hlinit\u00e9ho, MSZ a YSZ vykazuj\u00fa trimod\u00e1lnu mikro\u0161trukt\u00faru, ktor\u00e1 v\u00fdznamne ovplyv\u0148uje sp\u00f4sob lomu. V pr\u00edpade YSZ tieto mikro\u0161trukt\u00fary nazna\u010duj\u00fa interkry\u0161talick\u00fd sp\u00f4sob poru\u0161enia, zatia\u013e \u010do v pr\u00edpade MSZ a WO3 odha\u013euj\u00fa transkry\u0161talick\u00fd sp\u00f4sob poru\u0161enia; v\u00fdsledky testovania oboch materi\u00e1lov boli bl\u00edzke experiment\u00e1lnym hodnot\u00e1m poru\u0161enia pre v\u0161etky tri testovan\u00e9 materi\u00e1ly.<\/p>\n
P\u00f3rovit\u00e9 vzorky mullitu, ktor\u00e9 boli modifikovan\u00e9 magn\u00e9ziou stabilizovan\u00fdm zirk\u00f3nom (2,8mol% MgO) a WO3, maj\u00fa najvy\u0161\u0161iu zdanliv\u00fa p\u00f3rovitos\u0165 spomedzi spekan\u00fdch vzoriek s priemernou p\u00f3rovitos\u0165ou 73,2 + 2,2%. Zdvojn\u00e1sobenie mno\u017estva WO3 zni\u017euje p\u00f3rovitos\u0165 na 66 + 2%.<\/p>\n
Keramick\u00e9 vzorky MSZ a WO3 sa vyzna\u010duj\u00fa vysokou \u0161pecifickou tepelnou kapacitou v kombin\u00e1cii s n\u00edzkou tepelnou dif\u00faznos\u0165ou, ktor\u00e1 v\u00fdrazne zvy\u0161uje odolnos\u0165 vo\u010di tepeln\u00fdm \u0161okom v porovnan\u00ed s ytriom stabilizovan\u00fdm zirk\u00f3nom (8mol% Y2O3) a WO3. Sk\u00fa\u0161ky TRS s gu\u013e\u00f4\u010dkou na kr\u00fa\u017eku oxidu hlinit\u00e9ho, MSZ a YSZ uk\u00e1zali charakteristick\u00e9 pevnosti v r\u00e1mci prijate\u013en\u00fdch hodn\u00f4t o\u010dak\u00e1van\u00fdch od technickej keramiky, zatia\u013e \u010do ich Weibullove moduly spadaj\u00fa do prijate\u013en\u00fdch rozsahov pre pokro\u010dil\u00fa technick\u00fa keramiku.<\/p>\n
\u010ciasto\u010dne stabilizovan\u00fd ytriov\u00fd zirk\u00f3n (Y-PSZ) je u\u017e dlho ob\u013e\u00faben\u00fdm keramick\u00fdm materi\u00e1lom pre tepeln\u00e9 bari\u00e9rov\u00e9 povlaky (TBC). Poskytuje vysok\u00fa teplotn\u00fa stabilitu, vynikaj\u00facu h\u00fa\u017eevnatos\u0165 a n\u00edzku tepeln\u00fa vodivos\u0165 - ako aj starnutie pri vysok\u00fdch teplot\u00e1ch v d\u00f4sledku nedostato\u010dn\u00e9ho transportu i\u00f3nov pri prenose kysl\u00edka; jeho trvanlivos\u0165 je v\u0161ak ohrozen\u00e1 starnut\u00edm a zhut\u0148ovan\u00edm pri vysok\u00fdch teplot\u00e1ch; obmedzen\u00fd transport kysl\u00edka e\u0161te viac zhor\u0161uje trvanlivos\u0165. Na odstr\u00e1nenie t\u00fdchto nedostatkov pon\u00faka keramika zirk\u00f3nia stabilizovan\u00e1 c\u00e9rom (CSZ) lep\u0161iu odolnos\u0165 vo\u010di tepeln\u00fdm \u0161okom v\u010faka pou\u017eitiu c\u00e9rom stabilizovan\u00e9ho zirk\u00f3nia ako prom\u00f3tora oxid\u00e1cie a dvojvrstvovej kon\u0161trukcii, ktor\u00e1 pon\u00faka v\u00e4\u010d\u0161iu odolnos\u0165 vo\u010di tepeln\u00fdm \u0161okom.<\/p>\n
V porovnan\u00ed s ytriom % s hmotnos\u0165ou 8 pon\u00faka CSZ vynikaj\u00face vlastnosti odolnosti a h\u00fa\u017eevnatosti. Okrem toho nepodlieha f\u00e1zov\u00e9mu prechodu pri vysok\u00fdch teplot\u00e1ch a pon\u00faka vynikaj\u00facu odolnos\u0165 proti spekaniu. Okrem toho jeho koeficienty prestupu tepla a dif\u00faznos\u0165 i\u00f3nov kysl\u00edka umo\u017e\u0148uj\u00fa lep\u0161ie zabr\u00e1ni\u0165 oxid\u00e1cii povlaku spoja a substr\u00e1tu.<\/p>\n
Pokro\u010dil\u00e9 materi\u00e1ly vr\u00e1tane zirk\u00f3nanu gadol\u00ednia (GZO), hexalumin\u00e1tu lant\u00e1nu (LaAlO3), zirk\u00f3nanu v\u00e1penat\u00e9ho (CaZrO3) a cerom stabilizovan\u00e9ho zirk\u00f3nu (CSZ) sa vyu\u017e\u00edvaj\u00fa v najmodernej\u0161\u00edch termomechanick\u00fdch lo\u017eiskov\u00fdch krytoch (TBC) na ochranu kovov a keramiky pred degrad\u00e1ciou vplyvom tepla, \u010d\u00edm sa zabezpe\u010duje v\u00e4\u010d\u0161ia ochrana proti opotrebovaniu, ako aj odolnos\u0165 proti kor\u00f3zii pri vysok\u00fdch teplot\u00e1ch v aplik\u00e1ci\u00e1ch plynov\u00fdch turb\u00edn.<\/p>\n
V\u00fdskumn\u00edci vykonali kor\u00f3zne testy za tepla na hrub\u00fdch viacvrstvov\u00fdch syst\u00e9moch CYSZ, aby lep\u0161ie pochopili ich spr\u00e1vanie pri vysok\u00fdch teplot\u00e1ch. Po vykonan\u00ed rozsiahlej anal\u00fdzy ka\u017edej z\u00f3ny nebolo mo\u017en\u00e9 pozorova\u0165 \u017eiadne po\u0161kodenie sp\u00f4soben\u00e9 agres\u00edvnymi so\u013eami obsahuj\u00facimi S a Na. Okrem toho morfol\u00f3gia z\u00f3n TGO zostala konzistentn\u00e1 s morfol\u00f3giou povlakov aj po ukon\u010den\u00ed kor\u00f3znych sk\u00fa\u0161ok za tepla.<\/p>","protected":false},"excerpt":{"rendered":"
Bezkonkuren\u010dn\u00e1 trvanlivos\u0165 so zirk\u00f3niovou keramikou Zirk\u00f3nia pon\u00faka pokro\u010dil\u00e9 materi\u00e1lov\u00e9 rie\u0161enia pre \u0161irok\u00fa \u0161k\u00e1lu priemyseln\u00fdch aplik\u00e1ci\u00ed. Od kompozitn\u00e9ho z\u00e1zraku ZTA a\u017e po odoln\u00e9 vlastnosti Ce-TZP, jeho rozmanitos\u0165 zlo\u017eenia poskytuje vysoko v\u00fdkonn\u00e9 rie\u0161enia, ktor\u00e9 pokr\u00fdvaj\u00fa cel\u00fd rad priemyseln\u00fdch potrieb. Na mechanick\u00e9 vlastnosti adit\u00edvne vyr\u00e1banej zirk\u00f3novej keramiky m\u00f4\u017ee ma\u0165 vplyv mno\u017estvo faktorov vr\u00e1tane jej surov\u00edn, ... \u010c\u00edta\u0165 viac<\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":""},"categories":[2],"tags":[],"class_list":["post-8","post","type-post","status-publish","format-standard","hentry","category-product-related"],"_links":{"self":[{"href":"https:\/\/zirconiaceramic.net\/sk\/wp-json\/wp\/v2\/posts\/8","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zirconiaceramic.net\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zirconiaceramic.net\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zirconiaceramic.net\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zirconiaceramic.net\/sk\/wp-json\/wp\/v2\/comments?post=8"}],"version-history":[{"count":1,"href":"https:\/\/zirconiaceramic.net\/sk\/wp-json\/wp\/v2\/posts\/8\/revisions"}],"predecessor-version":[{"id":11,"href":"https:\/\/zirconiaceramic.net\/sk\/wp-json\/wp\/v2\/posts\/8\/revisions\/11"}],"wp:attachment":[{"href":"https:\/\/zirconiaceramic.net\/sk\/wp-json\/wp\/v2\/media?parent=8"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zirconiaceramic.net\/sk\/wp-json\/wp\/v2\/categories?post=8"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zirconiaceramic.net\/sk\/wp-json\/wp\/v2\/tags?post=8"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}