{"id":17,"date":"2023-11-07T13:38:48","date_gmt":"2023-11-07T05:38:48","guid":{"rendered":"https:\/\/artehistoria.net\/?p=17"},"modified":"2023-11-07T13:38:48","modified_gmt":"2023-11-07T05:38:48","slug":"performance-advantages-and-disadvantages-of-talc-ceramics","status":"publish","type":"post","link":"https:\/\/artehistoria.net\/hu\/a-talkumkeramia-teljesitmenyenek-elonyei-es-hatranyai\/","title":{"rendered":"A talkumker\u00e1mia teljes\u00edtm\u00e9nye, el\u0151nyei \u00e9s h\u00e1tr\u00e1nyai"},"content":{"rendered":"<p>A talkumker\u00e1mia, m\u00e1s n\u00e9ven blokkos talkumker\u00e1mia vagy talkumker\u00e1mia, a nagyfrekvenci\u00e1s k\u00e9sz\u00fcl\u00e9kek kiv\u00e1l\u00f3 elektromos tulajdons\u00e1gokkal rendelkez\u0151 ker\u00e1miat\u00edpusa. Talc porcel\u00e1n alacsony dielektromos \u00e1lland\u00f3 (\u00e1ltal\u00e1ban e = 6-7); Alacsony dielektromos vesztes\u00e9gsz\u00f6g tan\u03b4 tangens \u00e9rt\u00e9ke (3-20) \u00d7 10 k\u00f6z\u00f6tt ingadozik.<sup>-4<\/sup>, a szigetel\u00e9si szil\u00e1rds\u00e1g \u00e1ltal\u00e1ban 20-30 kV\/mm, a t\u00e9rfogati ellen\u00e1ll\u00e1s pedig magas (a t\u00e9rfogati ellen\u00e1ll\u00e1s 100 \u2103-n\u00e1l k\u00f6r\u00fclbel\u00fcl 10 \u2103-ig terjed).<sup>14<\/sup>\u03a9- cm), a statikus hajl\u00edt\u00f3szil\u00e1rds\u00e1g \u00e1ltal\u00e1ban 120-200MPa, a k\u00e9miai stabilit\u00e1s j\u00f3, sav\u00e1ll\u00f3, l\u00fag- \u00e9s korr\u00f3zi\u00f3\u00e1ll\u00f3. A frekvenciajellemz\u0151k szempontj\u00e1b\u00f3l a talkumker\u00e1mia dielektromos \u00e1lland\u00f3ja a frekvencia n\u00f6veked\u00e9s\u00e9vel cs\u00f6kken, \u00e9s nagy frekvenci\u00e1kon a h\u0151m\u00e9rs\u00e9klet n\u00f6veked\u00e9s\u00e9vel kev\u00e9ss\u00e9 v\u00e1ltozik. Tan\u03b4 f=10<sup>6<\/sup>Hz szokott cs\u00f6kkenni a frekvencia n\u00f6veked\u00e9s\u00e9vel, \u00edgy teljes m\u00e9rt\u00e9kben bizony\u00edtja a talkumker\u00e1mia el\u0151nyeit, amikor nagyfrekvenci\u00e1s k\u00e9sz\u00fcl\u00e9kker\u00e1miak\u00e9nt haszn\u00e1lj\u00e1k. A talkumker\u00e1mia nagy szigetel\u00e9si szil\u00e1rds\u00e1ga, alacsony dielektromos vesztes\u00e9ge \u00e9s kiv\u00e1l\u00f3 nagyfrekvenci\u00e1s jellemz\u0151i miatt, b\u00e1r a dielektromos \u00e1lland\u00f3 nem el\u00e9g magas, m\u00e9gis nagyfesz\u00fclts\u00e9g\u0171, nagy teljes\u00edtm\u00e9ny\u0171 ker\u00e1mia kondenz\u00e1tork\u00e9nt haszn\u00e1lhat\u00f3. A nagy teljes\u00edtm\u00e9ny\u0171 ker\u00e1miakondenz\u00e1tork\u00e9nt haszn\u00e1lt alacsony vesztes\u00e9g\u0171 talkumker\u00e1mia dielektromos vesztes\u00e9gsz\u00f6g-tangens \u00e9rt\u00e9ke el\u00e9rheti a (3,5-4) \u00d7 10<sup>-4<\/sup>.<\/p>\n<p>a talkumker\u00e1mi\u00e1nak van egy olyan hi\u00e1nyoss\u00e1ga is, amelyre kell\u0151 figyelmet kell ford\u00edtani: ha a gy\u00e1rt\u00e1sellen\u0151rz\u00e9s nem megfelel\u0151, a talkumporcel\u00e1n nem ker\u00fcl megfelel\u0151en elhelyez\u00e9sre. Vagy az \u00f6reged\u00e9si jelens\u00e9g el\u0151fordulhat a haszn\u00e1lat sor\u00e1n, amelyet a f\u0151 krist\u00e1lyos f\u00e1zis magn\u00e9zium-metaszilik\u00e1t krist\u00e1lyos \u00e1talakul\u00e1sa okoz, ami ker\u00e1miapor-k\u00e9pz\u0151d\u00e9shez, reped\u00e9shez, szil\u00e1rds\u00e1gcs\u00f6kken\u00e9shez \u00e9s a dielektromos tulajdons\u00e1gok roml\u00e1s\u00e1hoz vezet; A szinterel\u00e9si tartom\u00e1ny sz\u0171k, \u00e1ltal\u00e1ban csak 20 \u2103 k\u00f6r\u00fcl van. Ha a szinterez\u00e9s ellen\u0151rz\u00e9se nem j\u00f3, gyakran okoz deform\u00e1ci\u00f3t, h\u00f3lyagosod\u00e1st, a p\u00e1rn\u00e1z\u00e1s k\u00f6t\u00e9s\u00e9t, \u00e9s hullad\u00e9kterm\u00e9keket termel. A gyakorlat azt mutatja, hogy a talkumker\u00e1mia gy\u00e1rt\u00e1sa sor\u00e1n, ha a nyersanyagokat, a k\u00e9pletet vagy a gy\u00e1rt\u00e1si folyamatot nem megfelel\u0151en ellen\u0151rzik, gyakran \u00f6reged\u00e9s k\u00f6vetkezik be. Ha egyszer bek\u00f6vetkezik, s\u00falyos k\u00e1rokat \u00e9s vesztes\u00e9geket okoz a termel\u00e9sben \u00e9s a haszn\u00e1latban, \u00e9s az \u00f6reged\u00e9si jelens\u00e9get nagyra kell \u00e9rt\u00e9kelni. A kutat\u00e1sok meger\u0151s\u00edtett\u00e9k, hogy a talkumker\u00e1mia \u00f6reged\u00e9se vagy porl\u00f3d\u00e1sa a magn\u00e9zium-metaszilik\u00e1t (MgSiO<sub>3<\/sub>), a talkumker\u00e1mia f\u0151 krist\u00e1lyos f\u00e1zis\u00e1t, valamint a krist\u00e1ly\u00e1talakul\u00e1si folyamat sor\u00e1n fell\u00e9p\u0151 fesz\u00fclts\u00e9g \u00e9s fesz\u00fclts\u00e9g hat\u00e1sait.<\/p>","protected":false},"excerpt":{"rendered":"<p>Talc ceramics, also known as block talc ceramics or talc ceramics, are a type of high-frequency device ceramics with excellent [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[2],"tags":[],"class_list":["post-17","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/artehistoria.net\/hu\/wp-json\/wp\/v2\/posts\/17","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/artehistoria.net\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/artehistoria.net\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/artehistoria.net\/hu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/artehistoria.net\/hu\/wp-json\/wp\/v2\/comments?post=17"}],"version-history":[{"count":1,"href":"https:\/\/artehistoria.net\/hu\/wp-json\/wp\/v2\/posts\/17\/revisions"}],"predecessor-version":[{"id":18,"href":"https:\/\/artehistoria.net\/hu\/wp-json\/wp\/v2\/posts\/17\/revisions\/18"}],"wp:attachment":[{"href":"https:\/\/artehistoria.net\/hu\/wp-json\/wp\/v2\/media?parent=17"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/artehistoria.net\/hu\/wp-json\/wp\/v2\/categories?post=17"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/artehistoria.net\/hu\/wp-json\/wp\/v2\/tags?post=17"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}