{"id":1583,"date":"2025-05-12T03:02:42","date_gmt":"2025-05-12T03:02:42","guid":{"rendered":"https:\/\/nbaem.com\/?p=1583"},"modified":"2026-06-27T08:08:49","modified_gmt":"2026-06-27T08:08:49","slug":"strongest-magnet","status":"publish","type":"post","link":"https:\/\/nbaem.com\/sk\/strongest-magnet\/","title":{"rendered":"Naj silnej\u0161\u00ed magnet \u2013 neod\u00fdmov\u00fd magnet"},"content":{"rendered":"

Najsilnej\u0161\u00ed magnet \u2013 neod\u00fdmov\u00fd magnet<\/h1>\n\n

magnety s\u00fa v\u0161ade, no m\u00e1lokto vie, ktor\u00fd z nich skuto\u010dne vedie v sile.<\/p>\n

Neod\u00fdmov\u00e9 magnety s\u00fa najsilnej\u0161ie permanentn\u00e9 magnety dostupn\u00e9 dnes, predbiehaj\u00fa v\u0161etky ostatn\u00e9 typy v pevnosti magnetick\u00e9ho po\u013ea aj v energetickej hustote.<\/strong><\/p>\n

\"neod\u00fdmov\u00fd

prste\u0148ov\u00fd magnet \u2013 blokov\u00fd magnet \u2013 valcov\u00fd magnet \u2013 magnet s dierou<\/p><\/div>\n

Neod\u00fdmov\u00e9 magnety zmenili sp\u00f4sob, ak\u00fdm uva\u017eujeme o magnetickej sile. Ich mal\u00e9 rozmery skr\u00fdvaj\u00fa neuverite\u013en\u00fa silu. Po\u010fme presk\u00fama\u0165, \u010do ich rob\u00ed tak \u00fa\u010dinn\u00fdmi\u2014a pre\u010do ost\u00e1vaj\u00fa na trhu neporazen\u00e9.<\/p>\n

Ak\u00e1 je najvy\u0161\u0161ia magnetick\u00e1 sila?<\/h2>\n

V\u00e4\u010d\u0161ina \u013eud\u00ed si mysl\u00ed, \u017ee ve\u013ek\u00e9 magnety musia by\u0165 najsilnej\u0161ie. To nie je v\u017edy pravda.<\/p>\n

Najvy\u0161\u0161iu magnetick\u00fa silu poskytuj\u00fa neod\u00fdmov\u00e9 magnety, konkr\u00e9tne s triedami ako N52, ktor\u00e9 maj\u00fa energetick\u00e9 produkty nad 50 MGOe. M\u00e1me tie\u017e N54, N55. <\/strong><\/p>\n

\"\"<\/p>\n

Pochopenie sily magnetu v skuto\u010dn\u00fdch term\u00edloch<\/h3>\n

Aby som pochopil silu magnetu, v\u017edy sa pozer\u00e1m na maxim\u00e1lny energetick\u00fd produkt, alebo (BH)max. T\u00e1to hodnota n\u00e1m hovor\u00ed, ko\u013eko magnetickej energie m\u00f4\u017ee materi\u00e1l ulo\u017ei\u0165. Vy\u0161\u0161ie hodnoty znamenaj\u00fa silnej\u0161ie magnety. Neod\u00fdmov\u00e9 magnety sa zvy\u010dajne pohybuj\u00fa od 30 do 55 MGOe, v z\u00e1vislosti od triedy.<\/p>\n

Tu je r\u00fdchla porovn\u00e1vacia tabu\u013eka:<\/p>\n\n\n\n\n\n\n\n\n
Typ magnetu<\/th>\n(BH)max Rozsah (MGOe)<\/th>\nRelat\u00edvna pevnos\u0165<\/th>\n<\/tr>\n<\/thead>\n
Ferrit (keramika)<\/a><\/span><\/td>\n3 \u2013 4<\/td>\nN\u00edzky<\/td>\n<\/tr>\n
AlNiCo<\/a><\/span><\/td>\n5 \u2013 9<\/td>\nStredn\u00e1<\/td>\n<\/tr>\n
Samarium-kobalt<\/a><\/span><\/td>\n18 \u2013 30<\/td>\nVysok\u00e1<\/td>\n<\/tr>\n
Neod\u00fdm (NdFeB<\/span><\/a>)<\/span><\/td>\n30 \u2013 55<\/td>\nVe\u013emi vysok\u00e1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

N55 je najsilnej\u0161ia trieda be\u017ene pou\u017e\u00edvan\u00e1 dnes. Niektor\u00e9 laborat\u00f3ri\u00e1 vytvorili vy\u0161\u0161ie triedy, ale nie s\u00fa \u0161iroko dostupn\u00e9 kv\u00f4li n\u00e1kladom a probl\u00e9mom so stabilitou.<\/p>\n

\u010co rob\u00ed magnet silnej\u0161\u00edm?<\/h2>\n

Niektor\u00e9 magnety vyzeraj\u00fa rovnako, ale funguj\u00fa ve\u013emi odli\u0161ne.<\/p>\n

Sila magnetu z\u00e1vis\u00ed od jeho zlo\u017eenia materi\u00e1lu, vn\u00fatorn\u00e9 \u0161trukt\u00fary, v\u00fdrobn\u00e9ho procesu a triedy.<\/strong><\/p>\n

\"tok

Tok produkcie neodymov\u00fdch magnetov<\/p><\/div>\n

Veda za silou magnetu<\/h3>\n

Existuj\u00fa \u0161tyri k\u013e\u00fa\u010dov\u00e9 faktory, ktor\u00e9 ovplyv\u0148uj\u00fa magnetick\u00fa silu:<\/p>\n

1. Zlo\u017eenie<\/h4>\n

Neod\u00fdmov\u00e9 magnety sa vyr\u00e1baj\u00fa z zmesi neod\u00fdmu, \u017eeleza a boru (Nd\u2082Fe\u2081\u2084B). T\u00e1to kombin\u00e1cia vytv\u00e1ra ve\u013emi hust\u00e9 magnetick\u00e9 pole. Ferritov\u00e9 magnety naopak pou\u017e\u00edvaj\u00fa stroncium alebo b\u00f3r a pon\u00fakaj\u00fa ove\u013ea men\u0161iu silu.<\/p>\n

2. Krystalick\u00e1 \u0161trukt\u00fara<\/h4>\n

Sp\u00f4sob usporiadania at\u00f3mov vo vn\u00fatri magnetu je d\u00f4le\u017eit\u00fd. Neodymov\u00e9 magnety maj\u00fa tetragon\u00e1lnu kry\u0161talick\u00fa \u0161trukt\u00faru, ktor\u00e1 podporuje vysok\u00fa magnetiz\u00e1ciu. T\u00e1to \u0161trukt\u00fara pom\u00e1ha uzamkn\u00fa\u0165 magnetick\u00e9 pole a odol\u00e1va demagnetiz\u00e1cii.<\/p>\n

\"Kry\u0161talick\u00e1

Tetragon\u00e1lna kry\u0161talick\u00e1 \u0161trukt\u00fara Nd\u2082Fe\u2081\u2084B<\/p><\/div>\n

3. Trieda<\/h4>\n

Trieda (napr\u00edklad N35, N42, N55) n\u00e1m hovor\u00ed, ako je magnet siln\u00fd. Vy\u0161\u0161ie triedy maj\u00fa viac magnetickej energie na jednotku objemu. Ale magnety s vy\u0161\u0161ou triedou s\u00fa tie\u017e krehkej\u0161ie a citlivej\u0161ie na teplo.<\/p>\n

4. Kvalita v\u00fdroby<\/h4>\n

Sn\u00edtenie, lisovanie a povrchov\u00e1 \u00faprava v\u0161etko ovplyv\u0148uje, ako bude v\u00fdsledn\u00fd magnet vykon\u00e1va\u0165. Ak je v\u00fdrobn\u00fd proces nekonzistentn\u00fd, magnet m\u00f4\u017ee pod\u00e1va\u0165 slab\u0161\u00ed v\u00fdkon alebo r\u00fdchlo degradova\u0165.<\/p>\n

Tu je porovnanie t\u00fdchto faktorov:<\/p>\n\n\n\n\n\n\n\n\n
Faktor<\/th>\nVplyv na pevnos\u0165<\/th>\nPozn\u00e1mky<\/th>\n<\/tr>\n<\/thead>\n
Zlo\u017eenie<\/td>\nVe\u013emi vysok\u00e1<\/td>\nNdFeB je najlep\u0161\u00ed<\/td>\n<\/tr>\n
Kry\u0161talick\u00e1 \u0161trukt\u00fara<\/td>\nVysok\u00e1<\/td>\nVy\u017eaduje \u00fazku kontrolu po\u010das v\u00fdroby<\/td>\n<\/tr>\n
Stupe\u0148<\/td>\nVe\u013emi vysok\u00e1<\/td>\nN55 najsilnej\u0161\u00ed \u0161iroko dostupn\u00fd<\/td>\n<\/tr>\n
Kvalita procesu<\/td>\nMierna a\u017e vysok\u00e1<\/td>\nOvliv\u0148uje stabilitu a trvanlivos\u0165<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Pracoval som s mnoh\u00fdmi dod\u00e1vate\u013emi. Najlep\u0161\u00ed z nich v\u017edy kontroluj\u00fa tieto \u0161tyri faktory pr\u00edsnymi QC \u0161tandardmi.<\/p>\n

Ktor\u00fd magnet je najmocnej\u0161\u00ed?<\/h2>\n

Nie v\u0161etky magnety s\u00fa rovnak\u00e9 \u2013 aj v r\u00e1mci toho ist\u00e9ho typu.<\/p>\n

Neod\u00fdmov\u00e9 magnety s\u00fa najsilnej\u0161ie a medzi nimi trieda N55 pon\u00faka najvy\u0161\u0161\u00ed magnetick\u00fd v\u00fdkon.<\/strong><\/p>\n

Porovn\u00e1vanie tried neod\u00fdmu<\/h3>\n

Dovol\u00edm si podeli\u0165 sa o trochu zo svojej ka\u017edodennej pr\u00e1ce. Ke\u010f z\u00e1kazn\u00edci \u017eiadaj\u00fa \u201enajsilnej\u0161\u00ed magnet\u201c, zvy\u010dajne im ukazujem neod\u00fdmov\u00e9 magnety N55. Tieto poskytuj\u00fa najv\u00e4\u010d\u0161iu \u0165ahov\u00fa silu v najmen\u0161ej ve\u013ekosti.<\/p>\n

Ale N55 nie je najlep\u0161\u00ed na ka\u017ed\u00e9 pou\u017eitie. \u013dahko sa olupuje a str\u00e1ca silu pri vysok\u00fdch teplot\u00e1ch. Preto zvy\u010dajne odpor\u00fa\u010dam N42 alebo N48 pre vonkaj\u0161ie alebo motorov\u00e9 aplik\u00e1cie.<\/p>\n\n\n\n\n\n\n\n
Stupe\u0148<\/th>\n(BH)max (MGOe)<\/th>\nSila<\/th>\nTepeln\u00e1 odolnos\u0165<\/th>\nN\u00e1klady<\/th>\n<\/tr>\n<\/thead>\n
N35<\/td>\n~35<\/td>\nStredn\u00fd<\/td>\nDobr\u00fd<\/td>\nN\u00edzky<\/td>\n<\/tr>\n
N42<\/td>\n~42<\/td>\nVysok\u00e1<\/td>\nLep\u0161ie<\/td>\nStredn\u00fd<\/td>\n<\/tr>\n
N55<\/td>\n~55<\/td>\nNajvy\u0161\u0161ia<\/td>\nN\u00edzky<\/td>\nVysok\u00e1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Ak je va\u0161\u00edm jedin\u00fdm cie\u013eom sila, zvo\u013ete N55. Ale ak potrebujete rovnov\u00e1hu, N42 je skvel\u00e1 vo\u013eba.<\/p>\n

Pre\u010do s\u00fa magnety z vz\u00e1cnych zem\u00edn tak mocn\u00e9?<\/h2>\n

V\u00e4\u010d\u0161ina \u013eud\u00ed neviem, pre\u010do s\u00fa vz\u00e1cne zeminy magnety \u013eahko lep\u0161ie ne\u017e ostatn\u00e9.<\/p>\n

Vz\u00e1cne zeminy pou\u017e\u00edvaj\u00fa prvky ako neod\u00fdm a sam\u00e1rim, ktor\u00e9 maj\u00fa nep\u00e1rov\u00e9 elektr\u00f3ny a vytv\u00e1raj\u00fa siln\u00e9 magnetick\u00e9 polia.<\/strong><\/p>\n

Tajomstvo spo\u010d\u00edva v at\u00f3movom spr\u00e1van\u00ed<\/h3>\n

Vz\u00e1cne zeminy, najm\u00e4 neod\u00fdm, maj\u00fa jedine\u010dn\u00e9 elektr\u00f3nov\u00e9 \u0161trukt\u00fary. Maj\u00fa mnoho nep\u00e1rov\u00fdch elektr\u00f3nov vo vonkaj\u0161ej vrstve. To umo\u017e\u0148uje ve\u013emi siln\u00e9 magnetick\u00e9 dom\u00e9ny. Ke\u010f s\u00fa zoraden\u00e9, tieto dom\u00e9ny generuj\u00fa vysok\u00fd magnetick\u00fd tok.<\/p>\n

Existuj\u00fa dva hlavn\u00e9 typy magnetov zo vz\u00e1cnych zem\u00edn:<\/p>\n

    \n
  • NdFeB neodymov\u00e9 magnety (NdFeB)<\/strong>: Najsilnej\u0161\u00ed, ale citliv\u00fd na teplo a kor\u00f3ziu.<\/li>\n
  • Magn\u00e9ty Samarium-kobalt (SmCo)<\/strong>: Siln\u00fd a stabiln\u00fd pri vysokej teplote, no drah\u0161\u00ed.<\/li>\n<\/ul>\n\n\n\n\n\n\n
    magnet vz\u00e1cnych zem\u00edn<\/th>\nMax Energy (MGOe)<\/th>\nTempresa<\/th>\nKor\u00f3zna odolnos\u0165<\/th>\n<\/tr>\n<\/thead>\n
    NdFeB<\/td>\na\u017e do 52<\/td>\nN\u00edzky<\/td>\nN\u00edzky<\/td>\n<\/tr>\n
    SmCo<\/td>\na\u017e do 32<\/td>\nVysok\u00e1<\/td>\nVysok\u00e1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Videla som, \u017ee mnoho odvetv\u00ed pre\u0161lo na magnety z vz\u00e1cnych zem\u00edn, aby zmen\u0161ili ve\u013ekos\u0165 a zv\u00fd\u0161ili \u00fa\u010dinnos\u0165, od motorov po lek\u00e1rske n\u00e1stroje.<\/p>\n

    Z\u00e1ver<\/h2>\n

    Neod\u00fdmov\u00e9 magnety zost\u00e1vaj\u00fa bez konkuren\u010dn\u00e9ho sily, vynikaj\u00face pre vysokov\u00fdkonn\u00e9 magnetick\u00e9 aplik\u00e1cie.<\/p>","protected":false},"excerpt":{"rendered":"

    The Strongest Magnet \u2013 Neodymium Magnet Magnets are everywhere, but few people know which one truly leads the pack in strength. Neodymium magnets are the strongest permanent magnets available today, outperforming all other types in both magnetic strength and energy density. Neodymium magnets changed how we think about magnetic force. […]<\/p>","protected":false},"author":1,"featured_media":1590,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[31],"tags":[],"class_list":["post-1583","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-neodymium-magnet"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/05\/Xnip2025-05-12_10-40-53.jpg","_links":{"self":[{"href":"https:\/\/nbaem.com\/sk\/wp-json\/wp\/v2\/posts\/1583","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nbaem.com\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbaem.com\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbaem.com\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nbaem.com\/sk\/wp-json\/wp\/v2\/comments?post=1583"}],"version-history":[{"count":9,"href":"https:\/\/nbaem.com\/sk\/wp-json\/wp\/v2\/posts\/1583\/revisions"}],"predecessor-version":[{"id":3913,"href":"https:\/\/nbaem.com\/sk\/wp-json\/wp\/v2\/posts\/1583\/revisions\/3913"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/sk\/wp-json\/wp\/v2\/media\/1590"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/sk\/wp-json\/wp\/v2\/media?parent=1583"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/sk\/wp-json\/wp\/v2\/categories?post=1583"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/sk\/wp-json\/wp\/v2\/tags?post=1583"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}