U\u017e ste niekedy zahryzli do nie\u010doho tvrd\u00e9ho a b\u00e1li ste sa, \u017ee si vylom\u00edte zub? Alebo ste sa \u010dudovali, pre\u010do niektor\u00e9 no\u017ee zost\u00e1vaj\u00fa ostr\u00e9 ove\u013ea dlh\u0161ie ako in\u00e9? Pr\u00e1ve tu prich\u00e1dza na rad zirk\u00f3nov\u00e1 keramika - tento podce\u0148ovan\u00fd sil\u00e1k, ktor\u00fd je tvrd\u00fd, leskl\u00fd a objavuje sa na najr\u00f4znej\u0161\u00edch ne\u010dakan\u00fdch miestach. Vyr\u00e1ba sa z oxidu zirk\u00f3nnat\u00e9ho, \u010do sa zjednodu\u0161ene povedan\u00e9 odvodzuje od prvku zirk\u00f3nia, ktor\u00fd poch\u00e1dza z miner\u00e1lov, ako je zirk\u00f3n. Prv\u00fdkr\u00e1t som na\u0148 narazil pri n\u00e1kupe nov\u00fdch hodiniek; r\u00e1mik bol zo zirk\u00f3nu, odoln\u00fd vo\u010di po\u0161kriabaniu a leskol sa ako nov\u00fd aj po rokoch nosenia. To ma zaujalo a chcel som sa dozvedie\u0165 viac o tom, ako sa v tomto materi\u00e1li sp\u00e1ja tvrdos\u0165 podobn\u00e1 diamantu s praktickos\u0165ou v re\u00e1lnom svete.<\/p>\n
Zirk\u00f3n sa odli\u0161uje svojou vra\u017eednou kombin\u00e1ciou pevnosti a odolnosti. Na Mohsovej stupnici tvrdosti dosahuje hodnotu pribli\u017ene 8,5, \u010do znamen\u00e1, \u017ee je na \u00farovni zaf\u00edrov a znesie n\u00e1razy bez toho, aby \u013eahko praskol. Tajnou om\u00e1\u010dkou je \"transforma\u010dn\u00e9 spevnenie\" - ke\u010f d\u00f4jde k nam\u00e1haniu, kry\u0161t\u00e1lov\u00e1 \u0161trukt\u00fara sa trochu zmen\u00ed, pohlt\u00ed energiu a zastav\u00ed praskliny. Je to takmer akoby sa materi\u00e1l br\u00e1nil. Navy\u0161e takmer nevedie teplo, odol\u00e1va kor\u00f3zii a nereaguje s chemik\u00e1liami, tak\u017ee je mimoriadne bezpe\u010dn\u00fd pre kontakt s telom. Surov\u00fd zirk\u00f3n v\u0161ak m\u00f4\u017ee by\u0165 nevyspytate\u013en\u00fd; pri vysok\u00fdch teplot\u00e1ch men\u00ed f\u00e1zy, preto ho dopujeme l\u00e1tkami, ako je ytrium alebo magn\u00e9zium, aby sme ho uzavreli v stabilnej forme. Bez toho by sa pri teplotn\u00fdch v\u00fdkyvoch rozp\u00ednal a praskal.<\/p>\n
Aj hist\u00f3ria je celkom zauj\u00edmav\u00e1. Zirk\u00f3n bol objaven\u00fd u\u017e v roku 1700 v drah\u00fdch kame\u0148och, ale zirk\u00f3n ako tvrd\u00e1 keramika sa za\u010dal pou\u017e\u00edva\u0165 a\u017e v 70. rokoch. Ist\u00fd austr\u00e1lsky vedec Ron Garvie rozl\u00fa\u0161til k\u00f3d, ako ho vyrobi\u0165 odoln\u00fd, a nazval ho \"keramickou oce\u013eou\" pre jeho zrnitos\u0165 podobn\u00fa kovu bez hmotnosti. V s\u00fa\u010dasnosti sa vyr\u00e1ba lisovan\u00edm pr\u00e1\u0161ku oxidu zirkoni\u010dit\u00e9ho do tvarov a jeho pe\u010den\u00edm pri \u0161ialene vysok\u00fdch teplot\u00e1ch v procese naz\u00fdvanom spekanie. Z\u00edskavanie surov\u00edn nie je prech\u00e1dzka ru\u017eovou z\u00e1hradou - v\u00e4\u010d\u0161ina poch\u00e1dza z Austr\u00e1lie alebo Ju\u017enej Afriky a je drah\u00e1 kv\u00f4li potrebnej rafin\u00e1cii.<\/p>\n
Ke\u010f za\u010dnete h\u013eada\u0165, zirk\u00f3ny n\u00e1jdete v\u0161ade. V zubnom lek\u00e1rstve je to zmena: korunky a most\u00edky, ktor\u00e9 imituj\u00fa skuto\u010dn\u00e9 zuby, s\u00fa ve\u013emi pevn\u00e9 a nemus\u00edte sa ob\u00e1va\u0165 \u017eiadnych alergi\u00ed na kovy. M\u00f4j zub\u00e1r na ne pre\u0161iel u\u017e pred rokmi a pacienti miluj\u00fa, \u017ee p\u00f4sobia prirodzene. Z medic\u00ednskeho h\u013eadiska s\u00fa to n\u00e1hrady k\u013abov, ako s\u00fa bedrov\u00e9 a kolenn\u00e9 k\u013aby - vydr\u017eia viac ako 20 rokov s minim\u00e1lnym opotrebovan\u00edm. Kuch\u00e1rski profesion\u00e1li b\u00e1snia o zirk\u00f3nov\u00fdch no\u017eoch; dr\u017eia ostrie nav\u017edy a nehrdzavej\u00fa ani nefarbia. Pokia\u013e ide o trblietanie, kubick\u00fd zirk\u00f3n presved\u010divo napodob\u0148uje diamanty, ale \u0161pi\u010dkov\u00e1 verzia je v luxusn\u00fdch hodink\u00e1ch a \u0161perkoch pre ten bezkonkuren\u010dn\u00fd lesk. Z technick\u00e9ho h\u013eadiska je v kysl\u00edkov\u00fdch senzoroch automobilov, palivov\u00fdch \u010dl\u00e1nkoch tla\u010diacich zelen\u00fa energiu a dokonca aj v izol\u00e1toroch v gadgetoch. V leteckom priemysle sa pou\u017e\u00edva na s\u00fa\u010diastky, ktor\u00e9 vydr\u017eia vysok\u00e9 teploty bez deform\u00e1cie.<\/p>\n
Iste, m\u00e1 svoje \u0161pecifik\u00e1. Na vlhk\u00fdch miestach sa m\u00f4\u017ee \u010dasom pomaly zhor\u0161ova\u0165, \u010do sa naz\u00fdva degrad\u00e1cia pri n\u00edzkych teplot\u00e1ch, tak\u017ee cie\u013eom priebe\u017en\u00fdch \u00faprav je zv\u00fd\u0161i\u0165 odolnos\u0165. Recykl\u00e1cia je na vzostupe, aby sa zn\u00ed\u017eil vplyv na \u017eivotn\u00e9 prostredie, a 3D tla\u010d otv\u00e1ra dvere pre vlastn\u00e9 k\u00fasky vo v\u0161etkom od lek\u00e1rskych implant\u00e1tov a\u017e po vesm\u00edrne vybavenie.<\/p>\n
Celkovo je zirk\u00f3nov\u00e1 keramika t\u00fdm tich\u00fdm \u00faspechom - elegantn\u00e1, ale nerozbitn\u00e1, so zemit\u00fdmi kore\u0148mi a high-tech vibr\u00e1ciami. V na\u0161om svete, kde sa vyhadzuje, je osvie\u017euj\u00face ma\u0165 nie\u010do, \u010do vydr\u017e\u00ed. Ke\u010f nabud\u00face uvid\u00edte bezchybn\u00fd prste\u0148 alebo odoln\u00fd implant\u00e1t, je pravdepodobn\u00e9, \u017ee zirk\u00f3n je neop\u00edsan\u00fdm hrdinom, ktor\u00fd ho vytvoril.<\/p>","protected":false},"excerpt":{"rendered":"
Zirk\u00f3nov\u00e1 keramika: U\u017e ste niekedy zahryzli do nie\u010doho tvrd\u00e9ho a ob\u00e1vali ste sa, \u017ee si vylom\u00edte zub? Alebo ste sa \u010dudovali, pre\u010do niektor\u00e9 no\u017ee zost\u00e1vaj\u00fa ostr\u00e9 ove\u013ea dlh\u0161ie ako in\u00e9? Pr\u00e1ve tu prich\u00e1dza na rad zirk\u00f3nov\u00e1 keramika - tento podce\u0148ovan\u00fd sil\u00e1k, ktor\u00fd je tvrd\u00fd, leskl\u00fd a objavuje sa v najr\u00f4znej\u0161\u00edch ... \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-53","post","type-post","status-publish","format-standard","hentry","category-product-related"],"_links":{"self":[{"href":"https:\/\/zirconiaceramic.net\/sk\/wp-json\/wp\/v2\/posts\/53","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=53"}],"version-history":[{"count":1,"href":"https:\/\/zirconiaceramic.net\/sk\/wp-json\/wp\/v2\/posts\/53\/revisions"}],"predecessor-version":[{"id":56,"href":"https:\/\/zirconiaceramic.net\/sk\/wp-json\/wp\/v2\/posts\/53\/revisions\/56"}],"wp:attachment":[{"href":"https:\/\/zirconiaceramic.net\/sk\/wp-json\/wp\/v2\/media?parent=53"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zirconiaceramic.net\/sk\/wp-json\/wp\/v2\/categories?post=53"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zirconiaceramic.net\/sk\/wp-json\/wp\/v2\/tags?post=53"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}