{"id":71319,"date":"2023-10-03T14:00:16","date_gmt":"2023-10-03T12:00:16","guid":{"rendered":"https:\/\/botland.com.pl\/blog\/magnes-ferrytowy-co-to-jest-i-do-czego-sluzy\/"},"modified":"2026-04-08T11:05:15","modified_gmt":"2026-04-08T09:05:15","slug":"feritovy-magnet-co-je-to-feritovy-magnet-a-k-cemu-se-pouziva","status":"publish","type":"post","link":"https:\/\/botland.cz\/blog\/feritovy-magnet-co-je-to-feritovy-magnet-a-k-cemu-se-pouziva\/","title":{"rendered":"Feritov\u00fd magnet – Co je to feritov\u00fd magnet a k \u010demu se pou\u017e\u00edv\u00e1?"},"content":{"rendered":"\u010cas \u010dten\u00ed:<\/span> 3<\/span> min.<\/span><\/span>\t\t
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Feritov\u00fd magnet je tvo\u0159en kombinac\u00ed oxid\u016f \u017eeleza a keramick\u00fdch sintr\u016f. Rozli\u0161ujeme dva zp\u016fsoby v\u00fdroby magnet\u016f: za mokra a za sucha.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Co je feritov\u00fd magnet?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Feritov\u00e9 magnety<\/strong><\/a> se za\u010daly s\u00e9riov\u011b vyr\u00e1b\u011bt ji\u017e v 50. letech XX stolet\u00ed. D\u00edky sv\u00fdm vlastnostem se pou\u017e\u00edvaj\u00ed v mnoha pr\u016fmyslov\u00fdch odv\u011btv\u00edch. K v\u00fdrob\u011b magnet\u016f se pou\u017e\u00edv\u00e1 ferit barya<\/strong> (chemick\u00e1 zna\u010dka BaFe12O19) a ferit stroncia<\/strong> (SrFe12O19). Rozli\u0161ujeme izotropn\u00ed<\/strong> magnety vyroben\u00e9 tzv. suchou metodou<\/strong>. Tato metoda zahrnuje lisov\u00e1n\u00ed a n\u00e1slednou magnetizaci (v siln\u00e9m magnetick\u00e9m poli). <\/p>\n

Mokr\u00e1<\/strong> metoda naopak zahrnuje vst\u0159ikov\u00e1n\u00ed do p\u0159edem p\u0159ipraven\u00fdch forem, kter\u00e9 jsou um\u00edst\u011bny v magnetick\u00e9m poli. Bez ohledu na zp\u016fsob v\u00fdroby lze magnety magnetizovat v jednom i v\u00edce sm\u011brech. Obecn\u011b plat\u00ed, \u017ee p\u0159ita\u017eliv\u00e1 s\u00edla izotropn\u00edch magnet\u016f je men\u0161\u00ed ne\u017e p\u0159ita\u017eliv\u00e1 s\u00edla anizotropn\u00edch magnet\u016f stejn\u00e9 velikosti a hmotnosti.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t
V\u00e1lcov\u00fd feritov\u00fd magnet - 20x3mm - 5ks.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tPOD\u00cdVEJTE SE NA<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Co p\u0159itahuje feritov\u00fd magnet?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Popsan\u00e9 magnety p\u0159itahuj\u00ed kovy pat\u0159\u00edc\u00ed do skupiny feromagnetik, konkr\u00e9tn\u011b kobalt, gadolinium, nikl, dysprosium a slitiny niklu a \u017eeleza<\/strong>. Opakem feromagnetick\u00fdch kov\u016f jsou diamagnetick\u00e9<\/strong> kovy, kter\u00e9 d\u00edky sv\u00fdm vlastnostem feromagnetick\u00e9 magnety nep\u0159itahuj\u00ed, ale naopak jemn\u011b odpuzuj\u00ed. Pat\u0159\u00ed mezi n\u011b zlato, vizmut, olovo, m\u011b\u010f a tak\u00e9 uhl\u00edk<\/strong> (nekov).<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Feritov\u00e9 magnety - vlastnosti<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Jednou z nejd\u016fle\u017eit\u011bj\u0161\u00edch vlastnost\u00ed feritov\u00fdch magnet\u016f je, \u017ee si zachov\u00e1vaj\u00ed sv\u00e9 p\u016fvodn\u00ed vlastnosti v \u0161irok\u00e9m rozsahu provozn\u00edch teplot. V z\u00e1vislosti na konkr\u00e9tn\u00edm modelu a zp\u016fsobu v\u00fdroby (za mokra nebo za sucha) mohou b\u00fdt n\u011bkter\u00e9 magnety bezpe\u010dn\u00e9 a \u00fa\u010dinn\u011b fungovat p\u0159i teplot\u00e1ch a\u017e 300 \u00b0C<\/strong> (n\u011bkter\u00e9 magnety jsou navr\u017eeny pro pou\u017eit\u00ed p\u0159i teplot\u00e1ch a\u017e 250 \u00b0C). Nav\u00edc jsou pln\u011b odoln\u00e9 proti korozi<\/strong>, tak\u017ee je lze bezpe\u010dn\u011b pou\u017e\u00edvat v interi\u00e9ru i exteri\u00e9ru.<\/p>\n

Krom\u011b toho m\u016f\u017ee b\u00fdt feritov\u00fd magnet vystaven nejen p\u016fsoben\u00ed maziv<\/strong>, ale tak\u00e9 r\u016fzn\u00fdch plyn\u016f, sol\u00ed a vybran\u00fdch kyselin<\/strong>. Dal\u0161\u00ed v\u00fdhodou je vysok\u00e1 odolnost proti demagnetizaci<\/strong>. V praxi to znamen\u00e1, \u017ee si zachov\u00e1vaj\u00ed sv\u00e9 p\u016fvodn\u00ed vlastnosti i p\u0159i dlouhodob\u00e9m intenzivn\u00edm pou\u017e\u00edv\u00e1n\u00ed.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Dal\u0161\u00ed informace o feritov\u00fdch magnetech<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Feritov\u00fd magnet se vyzna\u010duje vysokou rezistenc\u00ed<\/strong>, co\u017e znamen\u00e1 velkou p\u0159ilnavost\u00ed v r\u016fzn\u00fdch magnetick\u00fdch pol\u00edch. V\u011bt\u0161ina feritov\u00fdch magnet\u016f m\u00e1 tmav\u011b \u0161edou barvu. N\u011bkte\u0159\u00ed v\u00fdrobci nav\u00edc magnety nat\u00edraj\u00ed modrou a \u010dervenou barvou pro snadn\u011bj\u0161\u00ed rozpozn\u00e1n\u00ed polarity. Feritov\u00fd magnet nen\u00ed odoln\u00fd v\u016f\u010di mechanick\u00e9mu po\u0161kozen\u00ed. I velk\u00e9 magnety jsou pom\u011brn\u011b k\u0159ehk\u00e9 a n\u00e1chyln\u00e9 k po\u0161kozen\u00ed, zejm\u00e9na p\u0159i p\u00e1du z v\u00fd\u0161ky na tvrd\u00fd povrch.<\/p>\n

Feritov\u00fd magnet je obvykle k dispozici ve tvaru v\u00e1lce, \u010dtvercov\u00e9 desky nebo podkovy<\/strong> v r\u016fzn\u00fdch velikostech, a tedy i hmotnostech.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Pou\u017eit\u00ed feritov\u00fdch magnet\u016f<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Vlastnosti feritov\u00fdch magnet\u016f (v\u010detn\u011b zachov\u00e1n\u00ed jejich p\u016fvodn\u00edch vlastnost\u00ed v \u0161irok\u00e9m rozsahu provozn\u00edch teplot a dlouh\u00e9 \u017eivotnosti a odolnosti) zaji\u0161\u0165uj\u00ed univerz\u00e1ln\u00ed pou\u017eit\u00ed<\/strong>. Feritov\u00e9 magnety se pou\u017e\u00edvaj\u00ed mimo jin\u00e9 v n\u00e1bytk\u00e1\u0159sk\u00e9m pr\u016fmyslu<\/strong> (nap\u0159. v magnetick\u00fdch z\u00e1mc\u00edch). Krom\u011b toho se feritov\u00e9 magnety pou\u017e\u00edvaj\u00ed v r\u016fzn\u00fdch m\u011b\u0159ic\u00edch za\u0159\u00edzen\u00edch<\/strong> (dobr\u00fdm p\u0159\u00edkladem jsou vodom\u011bry). Feritov\u00e9 magnety se pou\u017e\u00edvaj\u00ed tak\u00e9 v audio<\/strong> pr\u016fmyslu, konkr\u00e9tn\u011b v reproduktorech. Kde jinde je lze naj\u00edt? P\u0159edev\u0161\u00edm v separ\u00e1torech<\/strong>, r\u016fzn\u00fdch typech magnetick\u00fdch zved\u00e1k\u016f<\/strong> a tak\u00e9 v gener\u00e1torech<\/strong>.<\/p>\n

Krom\u011b toho je feritov\u00fd magnet sou\u010d\u00e1st\u00ed magnetick\u00fdch spojek<\/strong> a elektromotor\u016f<\/strong>. Dal\u0161\u00edmi aplikacemi magnet\u016f jsou kompasy, magnetick\u00e9 z\u00e1mky, magnetick\u00e9 zved\u00e1ky a magnetick\u00e9 dr\u017e\u00e1ky<\/a><\/strong>. Za zm\u00ednku stoj\u00ed zejm\u00e9na elektromagnety<\/strong><\/a>. Jedn\u00e1 se o speci\u00e1ln\u00ed typ magnetu, ve kter\u00e9m je magnetick\u00e9 pole vytv\u00e1\u0159eno elektrick\u00fdm proudem. V\u011bt\u0161ina elektromagnet\u016f je vyrobena z dr\u00e1tu<\/strong> navinut\u00e9ho na c\u00edvku<\/strong>. Kdy\u017e se na vodi\u010d p\u0159ivede nap\u011bt\u00ed, vytvo\u0159\u00ed se magnetick\u00e9 pole<\/strong>. Pole je soust\u0159ed\u011bno v otvoru, kter\u00fd je st\u0159edem c\u00edvky. Po odpojen\u00ed nap\u011bt\u00ed pole zmiz\u00ed. Dr\u00e1ty jsou navinuty na j\u00e1dro<\/strong>, kter\u00e9 je vyrobeno z materi\u00e1lu s ferimagnetick\u00fdmi nebo feromagnetick\u00fdmi vlastnostmi (nap\u0159. \u017eelezo). \u00dakolem j\u00e1dra je koncentrovat magnetick\u00fd tok<\/strong>. P\u0159ita\u017elivou s\u00edlu magnetu lze \u0159\u00eddit zv\u00fd\u0161en\u00edm nebo sn\u00ed\u017een\u00edm proudu ve vinut\u00ed.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Feritov\u00fd magnet versus neodymov\u00fd magnet<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Nejd\u016fle\u017eit\u011bj\u0161\u00edm rozd\u00edlem mezi feritov\u00fdmi a neodymov\u00fdmi magnety je hustota energie<\/strong>. Neodymov\u00e9 magnety maj\u00ed mnohem vy\u0161\u0161\u00ed hustotu energie, tak\u017ee maj\u00ed mal\u00e9 rozm\u011bry, n\u00edzkou hmotnost a vysokou pevnost.<\/p>\n

Magnet neodymov\u00fd magnet<\/strong><\/a>, zn\u00e1m\u00fd tak\u00e9 jako permanentn\u00ed magnety<\/strong>, se vyr\u00e1b\u00ed metodou pr\u00e1\u0161kov\u00e9 metalurgie<\/strong>. V\u00fdrobn\u00ed proces zahrnuje lisov\u00e1n\u00ed pr\u00e1\u0161kov\u00fdch komponent (neodym, b\u00f3r a \u017eelezo Nd2Fe14B) p\u0159i vysok\u00fdch teplot\u00e1ch a v magnetick\u00e9m poli. Neodymov\u00fd magnet mus\u00ed b\u00fdt pota\u017een dal\u0161\u00ed vrstvou, kter\u00e1 mu dod\u00e1 estetick\u00fd (leskl\u00fd) vzhled.<\/p>\n

Povlak m\u016f\u017ee b\u00fdt mimo jin\u00e9 fosf\u00e1tov\u00fd, niklov\u00fd nebo zinkov\u00fd<\/strong>. Nen\u00ed v\u0161ak tak tepeln\u011b odoln\u00fd jako feritov\u00e9 magnety. Mezi aplikace neodymov\u00fdch magnet\u016f pat\u0159\u00ed r\u016fzn\u00e9 typy elektronick\u00fdch za\u0159\u00edzen\u00ed (v\u010detn\u011b spot\u0159ebn\u00ed elektroniky) gener\u00e1tory a motory. Neodymov\u00e9 magnety, stejn\u011b jako feritov\u00e9 magnety, nejsou odoln\u00e9 v\u016f\u010di mechanick\u00e9mu po\u0161kozen\u00ed, v\u010detn\u011b n\u00e1raz\u016f a vibrac\u00ed. P\u00e1d z v\u00fd\u0161ky m\u016f\u017ee magnet tak\u00e9 po\u0161kodit. Prvky tohoto typu maj\u00ed r\u016fzn\u00e9 tvary (kulat\u00e9, v\u00e1lcov\u00e9, obd\u00e9ln\u00edkov\u00e9). V\u011bt\u0161inou jsou nab\u00edzeny v sad\u00e1ch po n\u011bkolika nebo des\u00edtk\u00e1ch kus\u016f. Oba typy magnet\u016f jsou relativn\u011b levn\u00e9<\/strong> (zejm\u00e9na mal\u00e9 modely), tak\u017ee se pou\u017e\u00edvaj\u00ed mimo jin\u00e9 v projektech pro kutily.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Feritov\u00fd magnet je tvo\u0159en kombinac\u00ed oxid\u016f \u017eeleza a keramick\u00fdch sintr\u016f. Rozli\u0161ujeme dva zp\u016fsoby v\u00fdroby magnet\u016f: za mokra a za sucha.<\/p>\n","protected":false},"author":22,"featured_media":71307,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[548,549],"tags":[],"class_list":["post-71319","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-elektronika-cs","category-kompendium-cs"],"acf":[],"yoast_head":"\nFeritov\u00fd magnet - Co je to feritov\u00fd magnet a k \u010demu se pou\u017e\u00edv\u00e1? - Botland<\/title>\n<meta name=\"description\" content=\"Feritov\u00fd magnet - vlastnosti, pou\u017eit\u00ed a zp\u016fsoby v\u00fdroby. 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