{"id":1494,"date":"2019-11-15T19:23:12","date_gmt":"2019-11-15T18:23:12","guid":{"rendered":"https:\/\/www.megastitch.eu\/?page_id=1494"},"modified":"2019-11-15T19:23:12","modified_gmt":"2019-11-15T18:23:12","slug":"neodymove-magnety","status":"publish","type":"page","link":"https:\/\/www.megastitch.eu\/cs\/neodymove-magnety\/","title":{"rendered":"Neodymov\u00e9 magnety"},"content":{"rendered":"

Co je to neodymov\u00fd magnet?<\/h3>\n

Neodymov\u00fd magnet<\/strong> (NdFeB magnet)<\/em> pat\u0159\u00ed mezi permanentn\u00ed magnety<\/strong>, tzn. \u017ee vyza\u0159uje magnetickou s\u00edlu, i bez pou\u017eit\u00ed elektrick\u00e9 energie (na rozd\u00edl od elektromagnet\u016f). Neodymov\u00e9 magnety jsou vyroben\u00e9 zap\u00e9k\u00e1n\u00edm kovov\u00e9ho prachu ze slitiny neodym – \u017eelezo – b\u00f3r. Pr\u00e1v\u011b d\u00edky t\u00e9to kombinaci maj\u00ed neodymov\u00e9 magnety svoje typick\u00e9 vlastnosti – velkou s\u00edlu ale i k\u0159ehkost.<\/p>\n

Magnety vyroben\u00e9 z t\u00e9to slitiny jsou nejsiln\u011bj\u0161\u00edmi magnety. Jsou o hodn\u011b siln\u011bj\u0161\u00ed ne\u017e ty, kter\u00e9 b\u011b\u017en\u011b pou\u017e\u00edv\u00e1te nap\u0159. na chladni\u010dku. N\u011bkter\u00e9 z nich dok\u00e1\u017eou udr\u017eet a\u017e 1000 – 2000 n\u00e1sobek svoj\u00ed hmotnosti. S\u00edla neodymov\u00fdch magnet\u016f se ozna\u010duje p\u00edsmenem „N“ (jako Neodym), za kter\u00fdm n\u00e1sleduje \u010d\u00edslo s rozsahem od N24 do N55. \u010c\u00edm vy\u0161\u0161\u00ed \u010d\u00edslo, t\u00edm je magnet siln\u011bj\u0161\u00ed.<\/p>\n

Pou\u017eit\u00ed neodymov\u00fdch magnet\u016f<\/h3>\n

Neod\u00fdmov\u00e9 magnety sa vyr\u00e1baj\u00fa v mnoh\u00fdch tvaroch a ve\u013ekostiach a v\u010faka tomu maju naozaj \u0161irok\u00e9 vyu\u017eitie. Pou\u017e\u00edvaj\u00fa sa v dom\u00e1cich spotrebi\u010doch, elektromotoroch, v s\u00fa\u010diastkach automobilov, elektrick\u00fdch zariaden\u00ed, ale napr\u00edklad aj v hra\u010dk\u00e1ch (magnetick\u00e9 gu\u013e\u00f4\u010dky).<\/p>\n

P\u00e9\u010de o neodymov\u00e9 magnety<\/h3>\n

Pro jak\u00e9 prost\u0159ed\u00ed jsou neodymov\u00e9 magnety vhodn\u00e9?<\/h4>\n

Neod\u00fdmov\u00e9 magnety bez povrchovej \u00fapravy ve\u013emi r\u00fdchlo oxiduj\u00fa a l\u00e1mu sa. Nami pou\u017e\u00edvan\u00e9 neod\u00fdmov\u00e9 magnety s\u00fa potiahnut\u00e9 tromi vrstvami nikel – me\u010f – nikel. V\u010faka tejto povrchovej \u00faprave s\u00fa odoln\u00e9 vo\u010di er\u00f3zii, no napriek tomu nie je vhodn\u00e9 ich pou\u017e\u00edva\u0165 dlhodobo vo vonkaj\u0161\u00edch podmienkach. Ide\u00e1lne prostredie pre pou\u017e\u00edvanie neod\u00fdmov\u00fdch magnetov je such\u00e9 vn\u00fatorn\u00e9 prostredie.<\/p>\n

Jak zach\u00e1zet s neodymov\u00fdmi magnety?<\/h4>\n

Neod\u00fdmov\u00e9 magnety s\u00fa napriek svojej ve\u013ekej sile dos\u0165 krehk\u00e9<\/strong>, preto je nutn\u00e9 zaobch\u00e1dza\u0165 s nimi opatrne. Nevystavujte magnety zr\u00e1\u017ekam ani n\u00e1razom. Ak by sa dva v\u00e4\u010d\u0161ie magnety k sebe pritiahli nekontrolovane, mohlo by d\u00f4js\u0165 k ich prasknutiu \u010di roztrie\u0161teniu, \u010d\u00edm m\u00f4\u017eu sp\u00f4sobi\u0165 r\u00f4zne zranenia. Okrem toho, naru\u0161en\u00edm ich povrchovej vrstvy stratia ochranu proti kor\u00f3zi\u00ed a v\u00fdrazne sa zn\u00ed\u017ei ich \u017eivotnos\u0165 vplyvom vonkaj\u0161ieho prostredia.<\/p>\n

Magnety skladujte oddelene, najlep\u0161ie na tenkom \u017eeleznom podklade. Spojen\u00e9 magnety od seba odde\u013eujte opatrne a s oh\u013eadom na bezpe\u010dnos\u0165. \u0164aha\u0165 magnety od seba (proti ich magnetickej sile) m\u00f4\u017ee by\u0165 n\u00e1ro\u010dn\u00e9. Odde\u013eujte ich rad\u0161ej \u0165ahan\u00edm do boku. Pri odde\u013eovan\u00ed magnety pevne dr\u017ete, aby nedo\u0161lo k n\u00e1hodn\u00e9mu op\u00e4tovn\u00e9mu spojeniu a vz\u00e1jomn\u00e9mu n\u00e1razu magnetov.<\/p>\n

Nevystavujte magnety vysok\u00fdm teplot\u00e1m. Neod\u00fdmov\u00e9 magnety maj\u00fa maxim\u00e1lnu pracovn\u00fa teplotu 80 a\u017e 200 \u00b0C. Pri teplote viac ako 80 \u00b0C v\u00e4\u010d\u0161ina neod\u00fdmov\u00fdch magnetov trvalo str\u00e1ca \u010das\u0165 svojej adh\u00e9znej sily.<\/p>\n

Neod\u00fdmov\u00e9 magnety nesp\u00e1jajte s feritov\u00fdmi magnetmi (klasick\u00e9 \u010dierne), preto\u017ee by sa neod\u00fdm mohol po\u0161kodi\u0165.<\/p>\n

Bezpe\u010dnostn\u00ed opat\u0159en\u00ed p\u0159i pou\u017e\u00edv\u00e1n\u00ed neodymov\u00fdch magnet\u016f<\/h3>\n

Neod\u00fdmov\u00e9 magnety uchov\u00e1vajte<\/strong> na bezpe\u010dnom mieste mimo dosahu det\u00ed<\/strong>. Dbajte o to, aby sa deti nehrali s neod\u00fdmov\u00fdmi magnetmi. Prehltnutie m\u00f4\u017ee sp\u00f4sobi\u0165 infekciu. Ak die\u0165a prehltne dva mal\u00e9 magnety, m\u00f4\u017eu vz\u00e1jomn\u00fdm pri\u0165ahovan\u00edm stla\u010di\u0165 vn\u00fatorn\u00e9 org\u00e1ny a sp\u00f4sobi\u0165 ta\u017ek\u00e9 poranenia.<\/p>\n

Pozor aj na elektrick\u00fa vodivos\u0165. Magnety s\u00fa z kovu a preto ved\u00fa elektrick\u00fd pr\u00fad. Deti by sa mohli pok\u00fasi\u0165 da\u0165 magnety do elektrickej z\u00e1suvky a t\u00fdm utrpie\u0165 \u00faraz elektrick\u00fdm pr\u00fadom.<\/p>\n

Pri preprave a doru\u010dovan\u00ed nevhodne zabalen\u00fdch neod\u00fdmov\u00fdch magnetov m\u00f4\u017eu ich magnetick\u00e9 polia sp\u00f4sobi\u0165 poruchy v triediacich strojoch a po\u0161kodi\u0165 citliv\u00fd tovar v in\u00fdch z\u00e1sielkach. Dokonca by mohli ovplyvni\u0165 naviga\u010dn\u00e9 zariadenia lietadiel po\u010das leteckej prepravy.<\/p>\n

Magnety vytv\u00e1raj\u00fa siln\u00e9 magnetick\u00e9 pole<\/strong>, ktor\u00e9 m\u00f4\u017ee po\u0161kodi\u0165 telev\u00edzory, po\u010d\u00edta\u010de, pevn\u00e9 disky, kreditn\u00e9 karty, bankomaty, pam\u00e4\u0165ov\u00e9 m\u00e9di\u00e1, hodinky, na\u010d\u00favacie pom\u00f4cky, kardiostimul\u00e1tory, reproduktory.<\/p>\n

Neod\u00fdmov\u00e9 magnety obsahuj\u00fa vo svojej povrchovej vrstve nikel, ktor\u00fd m\u00f4\u017ee niektor\u00fdm \u013eu\u010fom sp\u00f4sobi\u0165 alergick\u00fa reakciu.<\/p>\n

Neod\u00fdmov\u00e9 magnety pou\u017e\u00edvan\u00e9 v na\u0161ich magnetk\u00e1ch na vy\u0161\u00edvanie s\u00fa mal\u00e9, napriek tomu odpor\u00fa\u010dame dodr\u017eiava\u0165 v\u0161etky vy\u0161\u0161ie spomenut\u00e9 opatrenia a dba\u0165 na minimaliz\u00e1ciu riz\u00edk spojen\u00fdch s ich pou\u017e\u00edvan\u00edm.<\/p>\n

Zdroje:<\/h4>\n

https:\/\/sk.wikipedia.org<\/a>
\nhttps:\/\/www.wisegeek.com\/what-are-neodymium-magnets.htm<\/a>
\nhttps:\/\/www.unimagnet.sk\/<\/a>
\nhttps:\/\/silnemagnety.sk\/<\/a>
\nhttps:\/\/www.supermagnete.de\/eng\/safety-neodymium<\/a><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Co je to neodymov\u00fd magnet? Neodymov\u00fd magnet (NdFeB magnet) pat\u0159\u00ed mezi permanentn\u00ed magnety, tzn. \u017ee vyza\u0159uje magnetickou s\u00edlu, i bez pou\u017eit\u00ed elektrick\u00e9 energie (na rozd\u00edl od elektromagnet\u016f). Neodymov\u00e9 magnety jsou vyroben\u00e9 zap\u00e9k\u00e1n\u00edm kovov\u00e9ho prachu ze slitiny neodym – \u017eelezo – b\u00f3r. Pr\u00e1v\u011b d\u00edky t\u00e9to kombinaci maj\u00ed neodymov\u00e9 magnety svoje typick\u00e9 vlastnosti – velkou s\u00edlu ale […]<\/p>\n","protected":false},"author":9,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","ngg_post_thumbnail":0,"footnotes":""},"class_list":["post-1494","page","type-page","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t