{"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\/sk\/ceramic-magnets\/","title":{"rendered":"\u010co s\u00fa keramick\u00e9 magnets"},"content":{"rendered":"

Keramick\u00e9 magnety<\/span><\/a>, tie\u017e naz\u00fdvan\u00e9 keramick\u00e9 magnety, boli vyvinut\u00e9 v 60. rokoch ako lacn\u00e1 alternat\u00edva k kovov\u00fdm magnetom. V\u00e4\u010d\u0161inou pozost\u00e1vaj\u00fa z oxidu \u017eeleza a uhli\u010ditanu stroncia. Keramick\u00e9 magnety s\u00fa odoln\u00e9 vo\u010di kor\u00f3zii a maj\u00fa vysok\u00fa odolnos\u0165 vo\u010di demagnetiz\u00e1cii. Pou\u017e\u00edvaj\u00fa sa v mnoh\u00fdch odvetviach, preto\u017ee s\u00fa lacn\u00e9 za stupe\u0148 a udr\u017euj\u00fa svoje magnetick\u00e9 vlastnosti aj v n\u00e1ro\u010dn\u00fdch prostrediach. V tomto \u010dl\u00e1nku sa pozrieme na keramick\u00e9 magnety, na r\u00f4zne typy, ako sa vyr\u00e1baj\u00fa a ako sa pou\u017e\u00edvaj\u00fa v dne\u0161nej technol\u00f3gi\u00ed.<\/p>\n

\u010co s\u00fa keramick\u00e9 magnety?<\/strong><\/span><\/h2>\n

Keramick\u00e9 magnety, zn\u00e1me tie\u017e ako ferritov\u00e9 magnety, s\u00fa tvrd\u00e9 a krehk\u00e9 trval\u00e9 magnety vyr\u00e1ban\u00e9 mie\u0161an\u00edm oxidu \u017eeleza s bu\u010f baryom alebo stron\u010dianom uhli\u010dit\u00fdm. S\u00fa ob\u013e\u00faben\u00e9, preto\u017ee s\u00fa lacn\u00e9 a odoln\u00e9 vo\u010di kor\u00f3zii a demagnetiz\u00e1cii. Keramick\u00e9 magnety m\u00f4\u017eete pou\u017ei\u0165 v mnoh\u00fdch priemyseln\u00fdch aplik\u00e1ci\u00e1ch, ako s\u00fa DC motory, magnetick\u00e9 separ\u00e1tory a automobilov\u00e9 senzory. Pod\u013ea hmotnosti ferritov\u00e9 magnety tvoria viac ako 75% svetovej spotreby magnetov.<\/p>\n

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

Keramick\u00e9 magnety sa vyr\u00e1baj\u00fa technikami pr\u00e1\u0161kovej technol\u00f3gie. Zmie\u0161ate suroviny, ktor\u00e9 s\u00fa zvy\u010dajne oxid \u017eeleza a uhli\u010ditan stronciov\u00fd, a potom ich zahrievate na pribli\u017ene 980\u20131093 \u00b0C. Tento proces sp\u00f4sob\u00ed chemick\u00fa reakciu, ktor\u00e1 vytv\u00e1ra ferritov\u00fd materi\u00e1l. Ferrit sa potom zredukuje na jemn\u00fd pr\u00e1\u0161ok mokr\u00fdm mlet\u00edm. Pr\u00e1\u0161ok sa vysu\u0161\u00ed pre such\u00e9 lisovanie alebo vstrekne ako mokr\u00fd kal do matrice na tvarovanie.<\/p>\n

Vo vlhkom lisovan\u00ed sa kal zhutn\u00ed do matrice, \u010dasto s aplikovan\u00fdm magnetick\u00fdm po\u013eom. To zarovn\u00e1 ferritov\u00e9 \u010dastice, tak\u017ee magnet m\u00e1 po\u017eadovan\u00e9 magnetick\u00e9 vlastnosti. Posledn\u00fd krok je sinterovanie materi\u00e1lu pri pribli\u017ene 1093 \u00b0C. Tento proces odstra\u0148uje zvy\u0161n\u00fa vodu a vytv\u00e1ra hust\u00fd, pevn\u00fd magnet. Krehk\u00fd magnet sa potom br\u00fasi do po\u017eadovanej ve\u013ekosti diamantov\u00fdmi kolesami, preto\u017ee je tak tvrd\u00fd, \u017ee be\u017en\u00e9 n\u00e1stroje ho nedok\u00e1\u017eu tvarova\u0165.<\/p>\n

 <\/p>\n

Druhy keramick\u00fdch magnetov<\/strong><\/span><\/h2>\n

Existuj\u00fa r\u00f4zne typy keramick\u00fdch magnetov na z\u00e1klade ich magnetick\u00fdch vlastnost\u00ed a ur\u010denia.<\/p>\n

 <\/p>\n

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

    Ide o typick\u00e9 \u010dierne keramick\u00e9 magnety, ktor\u00e9 pozn\u00e1te. Skladaj\u00fa sa z oxidu \u017eeleza a uhli\u010ditanu stronciov\u00e9ho alebo barytov\u00e9ho. Trval\u00e9 keramick\u00e9 magnety udr\u017euj\u00fa siln\u00e9 magnetick\u00e9 pole po ich magnetiz\u00e1cii. N\u00e1jdete ich v motoroch, reproduktoroch a gener\u00e1toroch.<\/p>\n

      \n
    1. M\u00e4kk\u00e9 magnetick\u00e9 materi\u00e1ly<\/strong><\/li>\n<\/ol>\n

      M\u00e4kk\u00e9 keramick\u00e9 magnety s\u00fa vyroben\u00e9 z kombin\u00e1cie oxidu \u017eeleza a \u010fal\u0161\u00edch kovov\u00fdch oxidov ako niklu alebo zinku. Tieto magnety nie s\u00fa trval\u00e9. Neudr\u017euj\u00fa magnetick\u00e9 pole po odstr\u00e1nen\u00ed externej magnetiza\u010dnej sily. Pou\u017e\u00edvaj\u00fa sa v jadre transform\u00e1torov, tlmivk\u00e1ch a induktoroch.<\/p>\n

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

        Gyromagnetick\u00e9 keramick\u00e9 magnety maj\u00fa \u0161peci\u00e1lne vlastnosti, ke\u010f ich vystav\u00edte DC magnetick\u00e9mu po\u013eu kolm\u00e9mu na rovinu materi\u00e1lu alebo elektromagnetick\u00e9mu vlnov\u00e9mu po\u013eu. Tieto magnety pou\u017e\u00edvate v mikrovlnn\u00fdch komunika\u010dn\u00fdch syst\u00e9moch na riadenie polariz\u00e1cie elektromagnetick\u00fdch v\u013an, ktor\u00e9 prech\u00e1dzaj\u00fa polem.<\/p>\n

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

          V s\u00fa\u010dasnosti s\u00fa magnetick\u00e9 materi\u00e1ly ferritov\u00e9 materi\u00e1ly, napr\u00edklad magnetitov\u00fd ferrit z krem\u00edka. Tieto materi\u00e1ly maj\u00fa obd\u013a\u017enikov\u00fd hysterezn\u00fd diagram. To znamen\u00e1, \u017ee si dok\u00e1\u017eu ponecha\u0165 magnetiz\u00e1ciu, ktor\u00fa dosiahnu pri malom vonkaj\u0161om magnetickom poli. Tieto magnety pou\u017e\u00edvate vo pam\u00e4\u0165ov\u00fdch prvkoch pre po\u010d\u00edta\u010de a \u010fal\u0161iu elektroniku.<\/p>\n

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

            Piezomagnetick\u00e9 materi\u00e1ly maj\u00fa vlastnos\u0165 naz\u00fdvan\u00fa magnetostrikcia. Ke\u010f tieto materi\u00e1ly magnetizujete, zmenia svoj tvar. Piezomagnetick\u00e9 materi\u00e1ly pou\u017e\u00edvate v transduktoroch, ktor\u00e9 premie\u0148aj\u00fa elektromagnetick\u00fa energiu na mechanick\u00fa energiu. N\u00e1jdete ich v sonarov\u00fdch a ultrazvukov\u00fdch zariadeniach.<\/p>\n

             <\/p>\n

            Aplik\u00e1cie keramick\u00fdch magnetov<\/strong><\/span><\/h2>\n

            Keramick\u00e9 magnety sa pou\u017e\u00edvaj\u00fa v mnoh\u00fdch priemyseln\u00fdch a podnikov\u00fdch aplik\u00e1ci\u00e1ch. Tu je nieko\u013eko pr\u00edkladov:<\/p>\n

            Elektroakustick\u00e9 zariadenia: reproduktory, mikrof\u00f3ny, sl\u00fachadl\u00e1 at\u010f.<\/p>\n

            Motory a gener\u00e1tory: keramick\u00e9 magnety sa nach\u00e1dzaj\u00fa v DC motoroch a gener\u00e1toroch na vytv\u00e1ranie magnetick\u00fdch pol\u00ed.<\/p>\n

            Magnetick\u00e9 separ\u00e1tory: keramick\u00e9 magnety pou\u017e\u00edvate na oddelenie feromagnetick\u00fdch kontaminantov v potravin\u00e1ch, chemik\u00e1li\u00e1ch a in\u00fdch priemyseln\u00fdch procesoch.<\/p>\n

            Automobily senzory: keramick\u00e9 magnety sa pou\u017e\u00edvaj\u00fa v automobilov\u00fdch aplik\u00e1ci\u00e1ch, ako s\u00fa syst\u00e9my proti blokovaniu kolies a r\u00fdchlos\u0165ov\u00e9 senzory.<\/p>\n

            Magnetick\u00e9 \u00falo\u017eisko: Pevn\u00e9 disky a magnetick\u00e9 p\u00e1sy pou\u017e\u00edvan\u00e9 na z\u00e1znam zvuku, videa a \u00fadajov obsahuj\u00fa keramick\u00e9 magnety.<\/p>\n

            Mikrovlnn\u00e9 zariadenia: Gyromagnetick\u00e9 materi\u00e1ly pre mikrovlnn\u00e9 komunika\u010dn\u00e9 syst\u00e9my.<\/p>\n

            Watt-hodiny mera\u010de: Keramick\u00e9 magnety sa pou\u017e\u00edvaj\u00fa v merac\u00edch pr\u00edstrojoch na meranie spotreby elektriny.<\/p>\n

            Magnetick\u00e9 karty a pouk\u00e1\u017eky: Cestovn\u00e9 vy\u00fa\u010dtovacie syst\u00e9my, preukazy toto\u017enosti a cestovn\u00e9 pouk\u00e1\u017eky pou\u017e\u00edvaj\u00fa keramick\u00e9 magnety.<\/p>\n

             <\/p>\n

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

            Keramick\u00e9 magnety maj\u00fa oproti in\u00fdm typom magnetov ur\u010dit\u00e9 v\u00fdhody, medzi ktor\u00e9 patr\u00ed:<\/p>\n

            N\u00e1kladov\u00e1 efekt\u00edvnos\u0165: Ferritov\u00e9 magnety s\u00fa jedny z najlacnej\u0161\u00edch magnetov, ak\u00e9 si m\u00f4\u017eete k\u00fapi\u0165. Ak potrebujete magnety a cena je pre v\u00e1s d\u00f4le\u017eit\u00e1, tieto s\u00fa pre v\u00e1s tie prav\u00e9.<\/p>\n

            Odolnos\u0165 proti kor\u00f3zii: Keramick\u00e9 magnety s\u00fa odoln\u00e9 vo\u010di kor\u00f3zii a hrdzi. Nie je potrebn\u00e9 na ne nan\u00e1\u0161a\u0165 \u017eiadne ochrann\u00e9 vrstvy.<\/p>\n

            Odolnos\u0165 proti demagnetiz\u00e1cii: Keramick\u00e9 magnety maj\u00fa vynikaj\u00facu odolnos\u0165 proti demagnetiz\u00e1cii. Zachov\u00e1vaj\u00fa svoje magnetick\u00e9 vlastnosti v \u010dase.<\/p>\n

            Stabilita: Keramick\u00e9 magnety funguj\u00fa dobre v \u0161irokom rozsahu tepl\u00f4t. M\u00f4\u017eete ich pou\u017e\u00edva\u0165 v interi\u00e9ri aj exteri\u00e9ri.<\/p>\n

            Dostupnos\u0165: Ferritov\u00e9 magnety m\u00f4\u017eete z\u00edska\u0165 v mnoh\u00fdch r\u00f4znych tvaroch a ve\u013ekostiach, tak\u017ee sa hodia do mnoh\u00fdch priemyseln\u00fdch aplik\u00e1ci\u00ed.<\/p>\n

             <\/p>\n

            Z\u00e1ver<\/p>\n

            Keramick\u00e9 magnety predstavuj\u00fa skvel\u00e9, cenovo dostupn\u00e9 a spo\u013eahliv\u00e9 rie\u0161enie pre mnoho r\u00f4znych priemyseln\u00fdch a komer\u010dn\u00fdch aplik\u00e1ci\u00ed. Odol\u00e1vaj\u00fa kor\u00f3zii a demagnetiz\u00e1cii a s\u00fa lacn\u00e9. To z nich rob\u00ed ide\u00e1lnu vo\u013ebu pre v\u0161etko od motorov a senzorov po magnetick\u00e9 separ\u00e1tory a komunika\u010dn\u00e9 zariadenia. S nov\u00fdmi pokrokmi v materi\u00e1lovejedy, keramick\u00e9 magnety bud\u00fa na\u010falej nach\u00e1dza\u0165 uplatnenie v mnoh\u00fdch s\u00fa\u010dasn\u00fdch technol\u00f3gi\u00e1ch.<\/p>\n

             <\/p>\n

            Pre viac inform\u00e1ci\u00ed o keramick\u00fdch magnetoch, ich vlastnostiach a pou\u017eit\u00ed nav\u0161t\u00edvte NBAEM. Pred\u00e1vame kvalitn\u00e9 magnetick\u00e9 produkty u\u017e od roku 2010.<\/p>\n

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

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

            Keramick\u00e9 magnety, tie\u017e naz\u00fdvan\u00e9 ferritov\u00e9 magnety, boli vyvinut\u00e9 v 60. rokoch ako lacn\u00e1 alternat\u00edva k kovov\u00fdm magnetom. Skladaj\u00fa sa predov\u0161etk\u00fdm z oxidu \u017eeleza a uhli\u010ditanu stronciho. Keramick\u00e9 magnety s\u00fa odoln\u00e9 vo\u010di kor\u00f3zii a maj\u00fa vysok\u00fa odolnos\u0165 vo\u010di demagnetiz\u00e1cii. S\u00fa pou\u017e\u00edvan\u00e9 v mnoh\u00fdch odvetviach, preto\u017ee s\u00fa lacn\u00e9 za libru a dr\u017eia [\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\/sk\/wp-json\/wp\/v2\/posts\/1434","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=1434"}],"version-history":[{"count":2,"href":"https:\/\/nbaem.com\/sk\/wp-json\/wp\/v2\/posts\/1434\/revisions"}],"predecessor-version":[{"id":2814,"href":"https:\/\/nbaem.com\/sk\/wp-json\/wp\/v2\/posts\/1434\/revisions\/2814"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/sk\/wp-json\/wp\/v2\/media\/635"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/sk\/wp-json\/wp\/v2\/media?parent=1434"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/sk\/wp-json\/wp\/v2\/categories?post=1434"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/sk\/wp-json\/wp\/v2\/tags?post=1434"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}