{"id":37,"date":"2022-12-21T10:55:01","date_gmt":"2022-12-21T02:55:01","guid":{"rendered":"https:\/\/aluminaceramic.net\/?p=37"},"modified":"2022-12-21T12:00:48","modified_gmt":"2022-12-21T04:00:48","slug":"korundova-keramika","status":"publish","type":"post","link":"https:\/\/aluminaceramic.net\/cs\/alumina-ceramic\/","title":{"rendered":"korundov\u00e1 keramika"},"content":{"rendered":"

Hlin\u00edkov\u00e1 keramika je \u0161iroce pou\u017e\u00edvan\u00e1 keramika. D\u00edky sv\u00fdm vynikaj\u00edc\u00edm vlastnostem je v modern\u00ed spole\u010dnosti \u0161iroce pou\u017e\u00edv\u00e1na pro pot\u0159eby ka\u017edodenn\u00edho pou\u017eit\u00ed a speci\u00e1ln\u00ed v\u00fdkony.<\/p>\n

1. Tvrdost byla stanovena \u0160anghajsk\u00fdm silik\u00e1tov\u00fdm v\u00fdzkumn\u00fdm \u00fastavem \u010c\u00ednsk\u00e9 akademie v\u011bd a jej\u00ed tvrdost podle Rockwella byla HRA80-90, co\u017e je druh\u00e1 hodnota po diamantu a daleko p\u0159evy\u0161uje odolnost proti opot\u0159eben\u00ed ot\u011bruvzdorn\u00e9 oceli a nerezov\u00e9 oceli.<\/p>\n

2. Odolnost korundov\u00e9 keramiky proti opot\u0159eben\u00ed je vynikaj\u00edc\u00ed. Podle m\u011b\u0159en\u00ed V\u00fdzkumn\u00e9ho \u00fastavu pr\u00e1\u0161kov\u00e9 metalurgie St\u0159edoji\u017en\u00ed univerzity je odolnost proti opot\u0159eben\u00ed 266kr\u00e1t vy\u0161\u0161\u00ed ne\u017e u manganov\u00e9 oceli a 171,5kr\u00e1t vy\u0161\u0161\u00ed ne\u017e u litiny s vysok\u00fdm obsahem chromu. Podle pr\u016fzkumu sledov\u00e1n\u00ed na\u0161ich z\u00e1kazn\u00edk\u016f po dobu v\u00edce ne\u017e deseti let lze za stejn\u00fdch pracovn\u00edch podm\u00ednek prodlou\u017eit \u017eivotnost za\u0159\u00edzen\u00ed nejm\u00e9n\u011b desetkr\u00e1t.<\/p>\n

3. M\u00e1 n\u00edzkou hmotnost, jeho hustota je 3,5 g\/cm3, co\u017e je pouze polovina hustoty oceli, co\u017e m\u016f\u017ee v\u00fdrazn\u011b sn\u00ed\u017eit zat\u00ed\u017een\u00ed za\u0159\u00edzen\u00ed.<\/p>\n

Pro v\u00fdrobky z oxidu hlinit\u00e9ho lze pou\u017e\u00edt obecn\u00e9 metody tv\u00e1\u0159en\u00ed, jako je metoda such\u00e9ho lisov\u00e1n\u00ed, metoda injekt\u00e1\u017ee, metoda lit\u00ed, metoda vytla\u010dov\u00e1n\u00ed, metoda v\u00e1z\u00e1n\u00ed f\u00f3lie atd. V posledn\u00edch letech se v \u010c\u00edn\u011b i v zahrani\u010d\u00ed vyvinulo lisov\u00e1n\u00ed s filtrac\u00ed, p\u0159\u00edm\u00e9 tuhnut\u00ed, vst\u0159ikov\u00e1n\u00ed gelu, odst\u0159ediv\u00e9 injekt\u00e1\u017en\u00ed lisov\u00e1n\u00ed a lisov\u00e1n\u00ed bez tuhnut\u00ed. R\u016fzn\u00e9 v\u00fdrobky z oxidu hlinit\u00e9ho r\u016fzn\u00fdch tvar\u016f, velikost\u00ed, slo\u017eit\u00fdch tvar\u016f a p\u0159esnosti vy\u017eaduj\u00ed r\u016fzn\u00e9 metody lisov\u00e1n\u00ed.<\/p>\n

Mikrostruktura korundov\u00e9 keramiky ur\u010duje, \u017ee mus\u00ed m\u00edt \u0159adu v\u00fdhod, jako nap\u0159\u00edklad:Korundov\u00e1 keramika m\u00e1 vlastnosti vynikaj\u00edc\u00ed izolace, n\u00edzk\u00e9 vysokofrekven\u010dn\u00ed ztr\u00e1ty a dobrou vysokofrekven\u010dn\u00ed izolaci.Korundov\u00e1 keramika je neho\u0159lav\u00e1, nerezav\u00ed, je pevn\u00e1 a nen\u00ed snadn\u00e9 ji po\u0161kodit a m\u00e1 vynikaj\u00edc\u00ed vlastnosti, kter\u00fdm se jin\u00e9 organick\u00e9 materi\u00e1ly a kovov\u00e9 materi\u00e1ly nemohou vyrovnat.Odolnost proti opot\u0159eben\u00ed korundov\u00e9 keramiky je stejn\u00e1 jako u korundu a dosahuje stupn\u011b tvrdosti 9 podle Mohse. Odolnost proti opot\u0159eben\u00ed je srovnateln\u00e1 s odolnost\u00ed supertvrd\u00e9 slitiny. tepeln\u00e1 odolnost korundov\u00e9 keramiky se vyzna\u010duje mal\u00fdm koeficientem tepeln\u00e9 rozta\u017enosti, vysokou mechanickou pevnost\u00ed a dobrou tepelnou vodivost\u00ed. korundov\u00e1 keramika m\u00e1 vlastnosti odolnosti proti chemick\u00e9 korozi a odolnosti proti roztaven\u00e9mu kovu.<\/p>\n

\"korundov\u00e1<\/p>","protected":false},"excerpt":{"rendered":"

Alumina ceramic are widely used ceramics. Because of its superior performance, it has been widely used in modern society to meet the needs of daily use and special performance. 1. The hardness was determined by Shanghai Silicate Research Institute of the Chinese Academy of Sciences, and its Rockwell hardness was HRA80-90, which was second only… \u010c\u00edst d\u00e1le »korundov\u00e1 keramika<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"off","neve_meta_content_width":70,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[8],"tags":[],"class_list":["post-37","post","type-post","status-publish","format-standard","hentry","category-technology"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/aluminaceramic.net\/cs\/wp-json\/wp\/v2\/posts\/37","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aluminaceramic.net\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aluminaceramic.net\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aluminaceramic.net\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aluminaceramic.net\/cs\/wp-json\/wp\/v2\/comments?post=37"}],"version-history":[{"count":5,"href":"https:\/\/aluminaceramic.net\/cs\/wp-json\/wp\/v2\/posts\/37\/revisions"}],"predecessor-version":[{"id":43,"href":"https:\/\/aluminaceramic.net\/cs\/wp-json\/wp\/v2\/posts\/37\/revisions\/43"}],"wp:attachment":[{"href":"https:\/\/aluminaceramic.net\/cs\/wp-json\/wp\/v2\/media?parent=37"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aluminaceramic.net\/cs\/wp-json\/wp\/v2\/categories?post=37"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aluminaceramic.net\/cs\/wp-json\/wp\/v2\/tags?post=37"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}