{"id":1434,"date":"2024-12-16T08:41:13","date_gmt":"2024-12-16T08:41:13","guid":{"rendered":"https:\/\/nbaem.com\/?p=1434"},"modified":"2025-09-17T07:33:56","modified_gmt":"2025-09-17T07:33:56","slug":"ceramic-magnets","status":"publish","type":"post","link":"https:\/\/nbaem.com\/cs\/ceramic-magnets\/","title":{"rendered":"Co jsou keramick\u00e9 magnety"},"content":{"rendered":"

Keramick\u00e9 magnety<\/span><\/a>, naz\u00fdvan\u00e9 tak\u00e9 ferritov\u00e9 magnety, byly vyvinuty v 60. letech jako levn\u00e1 alternativa k kovov\u00fdm magnet\u016fm. Skl\u00e1daj\u00ed se p\u0159ev\u00e1\u017en\u011b z oxidu \u017eeleza a uhli\u010ditanu barnat\u00e9ho. Keramick\u00e9 magnety jsou odoln\u00e9 v\u016f\u010di korozi a maj\u00ed vysokou odolnost v\u016f\u010di demagnetizaci. Pou\u017e\u00edvaj\u00ed se v mnoha odv\u011btv\u00edch, proto\u017ee jsou levn\u00e9 za libru a udr\u017e\u00ed si magnetismus i v n\u00e1ro\u010dn\u00fdch prost\u0159ed\u00edch. V tomto \u010dl\u00e1nku se pod\u00edv\u00e1me na keramick\u00e9 magnety, jejich r\u016fzn\u00e9 typy, jak se vyr\u00e1b\u011bj\u00ed a jak se pou\u017e\u00edvaj\u00ed v dne\u0161n\u00ed technologii.<\/p>\n

Co jsou keramick\u00e9 magnety?<\/strong><\/span><\/h2>\n

Keramick\u00e9 magnety, zn\u00e1m\u00e9 tak\u00e9 jako ferritov\u00e9 magnety, jsou tvrd\u00e9 a k\u0159ehk\u00e9 permanentn\u00ed magnety vyr\u00e1b\u011bn\u00e9 m\u00edch\u00e1n\u00edm oxidu \u017eeleza s b\u00e1riov\u00fdm nebo strontiumov\u00fdm uhli\u010ditanem. Jsou obl\u00edben\u00e9, proto\u017ee jsou levn\u00e9 a odol\u00e1vaj\u00ed korozi a demagnetizaci. Keramick\u00e9 magnety lze pou\u017e\u00edt v mnoha pr\u016fmyslov\u00fdch aplikac\u00edch, jako jsou stejnosm\u011brn\u00e9 motory, magnetick\u00e9 separ\u00e1tory a automobilov\u00e9 senzory. Podle hmotnosti tvo\u0159\u00ed ferritov\u00e9 magnety v\u00edce ne\u017e 75 % sv\u011btov\u00e9 spot\u0159eby magnet\u016f.<\/p>\n

V\u00fdroba keramick\u00fdch magnet\u016f<\/strong><\/span><\/h2>\n

Keramick\u00e9 magnety se vyr\u00e1b\u011bj\u00ed pomoc\u00ed technik pr\u00e1\u0161kov\u00e9 technologie. Sm\u00edch\u00e1te suroviny, kter\u00e9 jsou obvykle oxid \u017eeleza a strontiumov\u00fd uhli\u010ditan, a pot\u00e9 je zah\u0159ejete na p\u0159ibli\u017en\u011b 1800-2000\u00b0F. Tento proces zp\u016fsob\u00ed chemickou reakci, kter\u00e1 produkuje ferritov\u00fd materi\u00e1l. Ferrit je pak zredukov\u00e1n na jemn\u00fd pr\u00e1\u0161ek pomoc\u00ed mokr\u00e9ho mlet\u00ed. Pr\u00e1\u0161ek se vysu\u0161\u00ed pro such\u00e9 stla\u010dov\u00e1n\u00ed nebo se vst\u0159ikuje jako mokr\u00e1 suspenze do formy k tvarov\u00e1n\u00ed.<\/p>\n

U mokr\u00e9ho stla\u010dov\u00e1n\u00ed se suspenze zhutn\u00ed v form\u011b, \u010dasto s pou\u017eit\u00edm magnetick\u00e9ho pole. To zarovn\u00e1 \u010d\u00e1stice ferritu, tak\u017ee magnet m\u00e1 po\u017eadovan\u00e9 magnetick\u00e9 vlastnosti. Posledn\u00edm krokem je sintrov\u00e1n\u00ed materi\u00e1lu p\u0159i asi 2000\u00b0F. Tento proces odstran\u00ed zb\u00fdvaj\u00edc\u00ed vodu a vytvo\u0159\u00ed hust\u00fd, pevn\u00fd magnet. K\u0159ehk\u00fd magnet je pot\u00e9 obrou\u0161en diamantov\u00fdmi kole\u010dky, proto\u017ee je tak tvrd\u00fd, \u017ee b\u011b\u017en\u00e9 n\u00e1stroje jej nedok\u00e1\u017eou tvarovat.<\/p>\n

 <\/p>\n

Typy keramick\u00fdch magnet\u016f<\/strong><\/span><\/h2>\n

Existuj\u00ed r\u016fzn\u00e9 typy keramick\u00fdch magnet\u016f na z\u00e1klad\u011b jejich magnetick\u00fdch vlastnost\u00ed a pou\u017eit\u00ed.<\/p>\n

 <\/p>\n

    \n
  1. Ferritov\u00e9 permanentn\u00ed magnety<\/strong><\/li>\n<\/ol>\n

    Jedn\u00e1 se o typick\u00e9 \u010dern\u00e9 keramick\u00e9 magnety, kter\u00e9 zn\u00e1te. Jsou vyrobeny z oxidu \u017eeleza a strontiumov\u00e9ho nebo baryov\u00e9ho uhli\u010ditanu. Permanentn\u00ed keramick\u00e9 magnety si udr\u017e\u00ed siln\u00e9 magnetick\u00e9 pole i po magnetizaci. Tyto magnety najdete v motorech, reproduktorech a gener\u00e1torech.<\/p>\n

      \n
    1. M\u011bkk\u00e9 magnetick\u00e9 materi\u00e1ly<\/strong><\/li>\n<\/ol>\n

      M\u011bkk\u00e9 keramick\u00e9 magnety jsou vyrobeny z kombinace oxidu \u017eeleza a dal\u0161\u00edch kovov\u00fdch oxid\u016f, jako je nikl nebo zinek. Tyto magnety nejsou permanentn\u00ed. Neudr\u017e\u00ed magnetick\u00e9 pole po odstran\u011bn\u00ed vn\u011bj\u0161\u00edho magnetiza\u010dn\u00edho zdroje. Pou\u017e\u00edvaj\u00ed se v j\u00e1drech transform\u00e1tor\u016f, tlumivk\u00e1ch a induktorech.<\/p>\n

        \n
      1. Gyromagnetick\u00e9 materi\u00e1ly<\/strong><\/li>\n<\/ol>\n

        Gyromagnetick\u00e9 keramick\u00e9 magnety maj\u00ed speci\u00e1ln\u00ed vlastnosti, kdy\u017e jsou vystaveny stejnosm\u011brn\u00e9mu magnetick\u00e9mu poli kolmo na rovinu materi\u00e1lu nebo elektromagnetick\u00e9mu vlnov\u00e9mu poli. Tyto magnety se pou\u017e\u00edvaj\u00ed v mikrovlnn\u00fdch komunika\u010dn\u00edch syst\u00e9mech k \u0159\u00edzen\u00ed polarizace elektromagnetick\u00fdch vln p\u0159i pr\u016fchodu.<\/p>\n

          \n
        1. Momentov\u00e9 magnetick\u00e9 materi\u00e1ly<\/strong><\/li>\n<\/ol>\n

          Momentov\u00e9 magnetick\u00e9 materi\u00e1ly jsou ferritov\u00e9 materi\u00e1ly, nap\u0159\u00edklad ho\u0159\u010d\u00edkov\u00fd manganov\u00fd ferrit. Tyto materi\u00e1ly maj\u00ed obd\u00e9ln\u00edkovou hysterezn\u00ed smy\u010dku. To znamen\u00e1, \u017ee si mohou udr\u017eet magnetizaci, kterou dos\u00e1hnou p\u0159i mal\u00e9m vn\u011bj\u0161\u00edm magnetick\u00e9m poli. Tyto magnety se pou\u017e\u00edvaj\u00ed v pam\u011b\u0165ov\u00fdch prvc\u00edch pro po\u010d\u00edta\u010de a dal\u0161\u00ed elektroniku.<\/p>\n

            \n
          1. Piezomagnetick\u00e9 materi\u00e1ly<\/strong><\/li>\n<\/ol>\n

            Piezomagnetick\u00e9 materi\u00e1ly maj\u00ed vlastnost zvanou magnetostrikce. Kdy\u017e tyto materi\u00e1ly magnetizujete, m\u011bn\u00ed tvar. Pou\u017e\u00edvaj\u00ed se v p\u0159evodn\u00edc\u00edch, kter\u00e9 p\u0159em\u011b\u0148uj\u00ed elektromagnetickou energii na mechanickou. Najdete je v sonaru a ultrazvukov\u00e9m za\u0159\u00edzen\u00ed.<\/p>\n

             <\/p>\n

            Pou\u017eit\u00ed keramick\u00fdch magnet\u016f<\/strong><\/span><\/h2>\n

            Keramick\u00e9 magnety se pou\u017e\u00edvaj\u00ed v mnoha pr\u016fmyslov\u00fdch a komer\u010dn\u00edch aplikac\u00edch. Zde je n\u011bkolik p\u0159\u00edklad\u016f:<\/p>\n

            Elektroakustick\u00e1 za\u0159\u00edzen\u00ed: reproduktory, mikrofony, sluch\u00e1tka atd.<\/p>\n

            Motory a gener\u00e1tory: Keramick\u00e9 magnety najdete v stejnosm\u011brn\u00fdch motorech a gener\u00e1torech pro vytv\u00e1\u0159en\u00ed magnetick\u00fdch pol\u00ed.<\/p>\n

            Magnetick\u00e9 separ\u00e1tory: Pou\u017e\u00edv\u00e1te keramick\u00e9 magnety k odd\u011blen\u00ed feromagnetick\u00fdch kontaminant\u016f v potravin\u00e1ch, chemik\u00e1li\u00edch a dal\u0161\u00edch pr\u016fmyslov\u00fdch procesech.<\/p>\n

            Automobilov\u00e9 senzory: Keramick\u00e9 magnety se pou\u017e\u00edvaj\u00ed v automobilov\u00fdch aplikac\u00edch, jako jsou brzdov\u00e9 syst\u00e9my proti zablokov\u00e1n\u00ed a rychlostn\u00ed senzory.<\/p>\n

            Magnetick\u00e9 ukl\u00e1d\u00e1n\u00ed: Pevn\u00e9 disky a magnetick\u00e9 p\u00e1sky pou\u017e\u00edvan\u00e9 pro audio, video a datov\u00e9 nahr\u00e1vky obsahuj\u00ed keramick\u00e9 magnety.<\/p>\n

            Mikrovlnn\u00e1 za\u0159\u00edzen\u00ed: Gyromagnetick\u00e9 materi\u00e1ly pro mikrovlnn\u00e9 komunika\u010dn\u00ed syst\u00e9my.<\/p>\n

            Watt-hodinov\u00e9 m\u011b\u0159i\u010de: Keramick\u00e9 magnety se pou\u017e\u00edvaj\u00ed v m\u011b\u0159i\u010d\u00edch spot\u0159eby elekt\u0159iny.<\/p>\n

            Magnetick\u00e9 karty a pouk\u00e1zky: J\u00edzdenkov\u00e9 syst\u00e9my, ID karty a cestovn\u00ed pouk\u00e1zky pou\u017e\u00edvaj\u00ed keramick\u00e9 magnety.<\/p>\n

             <\/p>\n

            V\u00fdhody keramick\u00fdch magnet\u016f<\/strong><\/span><\/h2>\n

            Keramick\u00e9 magnety maj\u00ed oproti jin\u00fdm typ\u016fm magnet\u016f n\u011bkter\u00e9 v\u00fdhody, v\u010detn\u011b:<\/p>\n

            N\u00e1kladov\u00e1 efektivita: Feritov\u00e9 magnety jsou jedny z nejlevn\u011bj\u0161\u00edch typ\u016f magnet\u016f, kter\u00e9 si m\u016f\u017eete koupit. Pokud pot\u0159ebujete magnety a cena je d\u016fle\u017eit\u00e1, jsou to ty prav\u00e9.<\/p>\n

            Odolnost proti korozi: Keramick\u00e9 magnety jsou odoln\u00e9 v\u016f\u010di rzi a korozi. Nen\u00ed nutn\u00e9 na n\u011b nan\u00e1\u0161et \u017e\u00e1dn\u00e9 ochrann\u00e9 vrstvy.<\/p>\n

            Odolnost proti demagnetizaci: Keramick\u00e9 magnety maj\u00ed vynikaj\u00edc\u00ed odolnost proti demagnetizaci. Udr\u017euj\u00ed si sv\u00e9 magnetick\u00e9 vlastnosti v \u010dase.<\/p>\n

            Stabilita: Keramick\u00e9 magnety funguj\u00ed dob\u0159e v \u0161irok\u00e9m rozsahu teplot. M\u016f\u017eete je pou\u017e\u00edvat uvnit\u0159 i venku.<\/p>\n

            Dostupnost: Feritov\u00e9 magnety lze z\u00edskat v mnoha r\u016fzn\u00fdch tvarech a velikostech, tak\u017ee jsou vhodn\u00e9 pro r\u016fzn\u00e9 pr\u016fmyslov\u00e9 aplikace.<\/p>\n

             <\/p>\n

            Z\u00e1v\u011br<\/p>\n

            Keramick\u00e9 magnety jsou skv\u011bl\u00fdm, levn\u00fdm a spolehliv\u00fdm \u0159e\u0161en\u00edm pro mnoho pr\u016fmyslov\u00fdch a komer\u010dn\u00edch aplikac\u00ed. Odol\u00e1vaj\u00ed korozi a demagnetizaci a jsou levn\u00e9. To je \u010din\u00ed ide\u00e1ln\u00edmi pro v\u0161e od motor\u016f a senzor\u016f po magnetick\u00e9 separ\u00e1tory a komunika\u010dn\u00ed za\u0159\u00edzen\u00ed. S nov\u00fdmi pokroky v materi\u00e1lov\u00e9 v\u011bd\u011b budou keramick\u00e9 magnety nad\u00e1le vyu\u017e\u00edv\u00e1ny v mnoha dne\u0161n\u00edch technologi\u00edch.<\/p>\n

             <\/p>\n

            Pro v\u00edce informac\u00ed o keramick\u00fdch magnetech, jejich vlastnostech a pou\u017eit\u00ed nav\u0161tivte NBAEM. Prod\u00e1v\u00e1me vysoce kvalitn\u00ed magnetick\u00e9 produkty od roku 2010.<\/p>\n

            \"ferritov\u00fd<\/p>\n

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

            Keramick\u00e9 magnety, tak\u00e9 naz\u00fdvan\u00e9 ferritov\u00e9 magnety, byly vyvinuty v 60. letech jako levn\u00e1 alternativa k kovov\u00fdm magnet\u016fm. Skl\u00e1daj\u00ed se p\u0159ev\u00e1\u017en\u011b z oxidu \u017eeleza a uhli\u010ditanu barnat\u00e9ho. Keramick\u00e9 magnety jsou odoln\u00e9 v\u016f\u010di korozi a maj\u00ed vysokou odolnost v\u016f\u010di demagnetizaci. Pou\u017e\u00edvaj\u00ed se v mnoha odv\u011btv\u00edch, proto\u017ee jsou levn\u00e9 za libru a dr\u017e\u00ed [\u2026]<\/p>","protected":false},"author":1,"featured_media":635,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1434","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2022\/06\/ferrite-magnet-\u603b\u56fe.png","_links":{"self":[{"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/posts\/1434","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/comments?post=1434"}],"version-history":[{"count":2,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/posts\/1434\/revisions"}],"predecessor-version":[{"id":2814,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/posts\/1434\/revisions\/2814"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/media\/635"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/media?parent=1434"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/categories?post=1434"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/cs\/wp-json\/wp\/v2\/tags?post=1434"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}