{"id":19,"date":"2023-11-07T13:59:53","date_gmt":"2023-11-07T05:59:53","guid":{"rendered":"https:\/\/artehistoria.net\/?p=19"},"modified":"2023-11-07T14:17:24","modified_gmt":"2023-11-07T06:17:24","slug":"study-on-aging-of-talc-ceramics-transformation-between-magnesium-metasilicate-crystals","status":"publish","type":"post","link":"https:\/\/artehistoria.net\/hu\/tanulmany-a-magnezium-metaszilikat-kristalyok-kozotti-atalakulasrol-a-talkumkeramia-oregedeserol\/","title":{"rendered":"Tanulm\u00e1ny a talkumker\u00e1mia \u00f6reged\u00e9s\u00e9r\u0151l - \u00c1talakul\u00e1s a magn\u00e9zium-metaszilik\u00e1t krist\u00e1lyok k\u00f6z\u00f6tt"},"content":{"rendered":"<p>A magn\u00e9zium-metaszilik\u00e1t krist\u00e1lyform\u00e1i k\u00f6z\u00f6tti \u00e1talakul\u00e1ssal kapcsolatban kiterjedt kutat\u00e1sokat v\u00e9geztek. Jelenleg azonban m\u00e9g nem lehet \u00fagy tekinteni, hogy teljesen egys\u00e9ges \u00e9s hat\u00e1rozott felfog\u00e1s \u00e1llna rendelkez\u00e9sre ebben a k\u00e9rd\u00e9sben. A J.F. Sarver \u00e9s t\u00e1rsai \u00e1ltal 1962-ben kapott eredm\u00e9nyek azonban felhaszn\u00e1lhat\u00f3k az MgSiO<sub>3<\/sub> 1400 \u2103 alatti h\u0151m\u00e9rs\u00e9kleten alapvet\u0151 inform\u00e1ci\u00f3k a krist\u00e1ly\u00e1talakul\u00e1s t\u00f6rv\u00e9nyeir\u0151l. Saville et al. az MgSiO<sub>3<\/sub> A T-P f\u00e1zisdiagram azt mutatja, hogy a talkumker\u00e1mia \u00e9get\u00e9se sor\u00e1n kialakul\u00f3 f\u0151 krist\u00e1lyos f\u00e1zis az eredeti enstatit, amely 1042 \u2103-ra h\u0171lt le (a kiolt\u00e1si m\u00f3dszerrel m\u00e9rve). A magas h\u0151m\u00e9rs\u00e9klet\u0171 r\u00f6ntgendiffrakci\u00f3s m\u00f3dszerrel kapott eredm\u00e9ny 1035 \u2103, \u00e9s 865 \u2103 k\u00f6z\u00f6tt tendencia van az enstatitt\u00e1 val\u00f3 \u00e1talakul\u00e1sra, 865 \u2103 alatt pedig tendencia van a metastabil krist\u00e1lyos klinopirox\u00e9nn\u00e9 val\u00f3 \u00e1talakul\u00e1sra. 865 \u2103 alatt a metastabil krist\u00e1lyos klinopirox\u00e9n hossz\u00fa ideig l\u00e9tezhet, \u00e9s nem alakul \u00e1t termodinamikailag stabil klinopirox\u00e9nn\u00e9. A talkumker\u00e1mi\u00e1k \u00f6reged\u00e9s\u00e9t vagy porl\u00e1s\u00e1t a magas h\u0151m\u00e9rs\u00e9klet\u0171 krist\u00e1lyos f\u00e1zis\u00fa primer ensztatit \u00e1talakul\u00e1sa okozza ensztatit vagy klinopirox\u00e9nn\u00e9 a h\u0171t\u00e9s, az elhelyez\u00e9s \u00e9s a haszn\u00e1lat sor\u00e1n.<\/p>\n<p>A r\u00e1csparam\u00e9terekb\u0151l sz\u00e1m\u00edtott elm\u00e9leti s\u0171r\u0171s\u00e9g alapj\u00e1n l\u00e1that\u00f3, hogy a primer ensztatit szobah\u0151m\u00e9rs\u00e9kleten klinopirox\u00e9nn\u00e9 t\u00f6rt\u00e9n\u0151 \u00e1talakul\u00e1sa k\u00f6r\u00fclbel\u00fcl 2,8% t\u00e9rfogatv\u00e1ltoz\u00e1ssal j\u00e1r, \u00e9s a primer ensztatit ensztatitt\u00e1 t\u00f6rt\u00e9n\u0151 \u00e1talakul\u00e1sakor a t\u00e9rfogatv\u00e1ltoz\u00e1s m\u00e9g enn\u00e9l is nagyobb. Ha a r\u00e1csparam\u00e9terek alapj\u00e1n elemezz\u00fck, mivel a t\u00e9rfogatv\u00e1ltoz\u00e1s a krist\u00e1ly c-tengely\u0171 r\u00f6vid\u00fcl\u00e9s\u00e9nek \u00e9s b-tengely\u0171 megny\u00fal\u00e1s\u00e1nak \u00f6sszes\u00edtett eredm\u00e9nye, a szemcsehosszv\u00e1ltoz\u00e1s hat\u00e1sa az \u00e1talakul\u00e1si folyamat sor\u00e1n elker\u00fclhetetlen\u00fcl jelent\u0151sebb, mint amit a t\u00e9rfogatv\u00e1ltoz\u00e1s \u00e9rt\u00e9ke t\u00fckr\u00f6z. Az \u00e1talakul\u00e1si folyamatot k\u00eds\u00e9r\u0151 nagy alakv\u00e1ltoz\u00e1s elker\u00fclhetetlen\u00fcl nagy fesz\u00fclts\u00e9get gener\u00e1l, \u00e9s ennek a f\u00e1zisv\u00e1ltoz\u00e1si fesz\u00fclts\u00e9gnek a hat\u00e1sa a k\u00f6zvetlenebb oka a talkumporcel\u00e1n \u00f6reged\u00e9s\u00e9nek vagy porl\u00f3d\u00e1s\u00e1nak. Az eredeti enstatit a talkumporcel\u00e1n f\u0151 krist\u00e1lyos f\u00e1zisa, \u00e9s a talkumker\u00e1mia kiv\u00e1l\u00f3 teljes\u00edtm\u00e9nye k\u00f6zvetlen\u00fcl kapcsol\u00f3dik az eredeti enstatithoz. Ily m\u00f3don a talkumporcel\u00e1n \u00f6reged\u00e9si vagy porl\u00f3d\u00e1si probl\u00e9m\u00e1j\u00e1nak megold\u00e1sa az eredeti enstatit stabiliz\u00e1l\u00e1s\u00e1nak probl\u00e9m\u00e1j\u00e1v\u00e1 v\u00e1lik, hogy h\u0171t\u00e9s, elhelyez\u00e9s \u00e9s haszn\u00e1lat sor\u00e1n ne alakuljon \u00e1t enstatitt\u00e1 vagy klinopirox\u00e9nn\u00e9.<\/p>","protected":false},"excerpt":{"rendered":"<p>A magn\u00e9zium-metaszilik\u00e1t krist\u00e1lyform\u00e1i k\u00f6z\u00f6tti \u00e1talakul\u00e1ssal kapcsolatban kiterjedt kutat\u00e1sokat v\u00e9geztek. Jelenleg azonban nem lehet [...]<\/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-19","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/artehistoria.net\/hu\/wp-json\/wp\/v2\/posts\/19","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=19"}],"version-history":[{"count":4,"href":"https:\/\/artehistoria.net\/hu\/wp-json\/wp\/v2\/posts\/19\/revisions"}],"predecessor-version":[{"id":23,"href":"https:\/\/artehistoria.net\/hu\/wp-json\/wp\/v2\/posts\/19\/revisions\/23"}],"wp:attachment":[{"href":"https:\/\/artehistoria.net\/hu\/wp-json\/wp\/v2\/media?parent=19"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/artehistoria.net\/hu\/wp-json\/wp\/v2\/categories?post=19"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/artehistoria.net\/hu\/wp-json\/wp\/v2\/tags?post=19"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}