{"id":113502,"date":"2024-07-26T11:13:31","date_gmt":"2024-07-26T09:13:31","guid":{"rendered":"https:\/\/www.linseis.com\/termal-analiz-yoentemleri\/zaman-etki-alani-termoreflektansi-tdtr\/"},"modified":"2026-01-23T11:44:35","modified_gmt":"2026-01-23T10:44:35","slug":"zaman-etki-alani-termoreflektansi-tdtr","status":"publish","type":"page","link":"https:\/\/www.linseis.com\/tr\/termal-analiz-yoentemleri\/zaman-etki-alani-termoreflektansi-tdtr\/","title":{"rendered":"Zaman etki alan\u0131 termoreflektans\u0131 (TDTR)"},"content":{"rendered":"\t\t
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\n\nZaman etki alan\u0131 termoreflektans\u0131 (TDTR)\n\n<\/b><\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Linseis<\/span><\/a><\/span><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Zaman etki alan\u0131 termoreflektans\u0131 (TDTR)<\/h2>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Son on y\u0131lda, TDTR – Zaman Alan\u0131 Termoreflektans <\/strong>\u00d6l\u00e7\u00fcm Teknolojisi, kaplamalar\u0131n ve ince filmlerin termal ta\u015f\u0131n\u0131m \u00f6zelliklerini \u00f6l\u00e7mek <\/strong>i\u00e7in g\u00fc\u00e7l\u00fc ve evrensel olarak uygulanabilir bir ara\u00e7 haline gelmi\u015ftir. \u00d6l\u00e7\u00fcm tekni\u011fi, hem termal ta\u015f\u0131ma \u00f6zellikleri hem de numune geometrisi a\u00e7\u0131s\u0131ndan \u00e7ok \u00e7e\u015fitli numunelere uygulanabilir. Ayr\u0131ca, numunelerin yanal taranmas\u0131 da m\u00fcmk\u00fcnd\u00fcr, bu da konumun bir fonksiyonu olarak termal iletkenli\u011fin \u00f6l\u00e7\u00fclmesini sa\u011flar. Lazer noktalar\u0131n\u0131n numune y\u00fczeyine odaklanmas\u0131 ve \u00f6l\u00e7\u00fcm\u00fcn y\u00fcksek sinyal-g\u00fcr\u00fclt\u00fc oran\u0131 sayesinde, daha b\u00fcy\u00fck \u00f6l\u00e7\u00fcm serileri i\u00e7in y\u00fcksek verim oranlar\u0131 da elde edilebilir. <\/p>

TDTR \u00f6l\u00e7\u00fcm kurulumlar\u0131 i\u00e7in tipik uygulamalar, ince tabakalar veya kaplanm\u0131\u015f kat\u0131 malzemeler \u00fczerinde termal iletkenlik \u00f6l\u00e7\u00fcmleridir.<\/p><\/div><\/div><\/div><\/div><\/div><\/section>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\"\"<\/p>

Pompa ve prob lazer kayna\u011f\u0131 ile TDTR \u0131s\u0131 dif\u00fczyon \u00f6l\u00e7\u00fcmleri i\u00e7in test kurulumu<\/em><\/p><\/div><\/div><\/div><\/section>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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TDTR optik, temass\u0131z bir y\u00f6ntem oldu\u011fundan, numuneleri optik portlu kriyostatlarda, y\u00fcksek s\u0131cakl\u0131k mikroskoplar\u0131nda veya y\u00fcksek bas\u0131n\u00e7l\u0131 bir ortamda \u00f6l\u00e7mek de m\u00fcmk\u00fcnd\u00fcr.<\/p>

Bu \u00f6l\u00e7\u00fcm tekni\u011finin bir \u00f6zelli\u011fi, analiz edilecek numunenin y\u00fczeyinde bir metal filmin biriktirilmesi gerekti\u011fidir. Bu metal film optik bir d\u00f6n\u00fc\u015ft\u00fcr\u00fcc\u00fc g\u00f6revi g\u00f6r\u00fcr, \u00e7\u00fcnk\u00fc bu metal tabakan\u0131n yans\u0131t\u0131c\u0131l\u0131\u011f\u0131ndaki de\u011fi\u015fiklik, s\u0131cakl\u0131ktaki de\u011fi\u015fikli\u011fi \u00e7\u0131karmak i\u00e7in kullan\u0131labilir. \u00d6l\u00e7\u00fcm i\u00e7in, numunenin y\u00fczeyindeki bir noktay\u0131 lokal olarak \u0131s\u0131tmak i\u00e7in g\u00fc\u00e7l\u00fc bir birincil lazer (pompa lazeri) kullan\u0131l\u0131r ve metal filmin yans\u0131t\u0131c\u0131l\u0131\u011f\u0131ndaki de\u011fi\u015fiklikler nedeniyle bu noktan\u0131n \u0131s\u0131nmas\u0131 ikinci bir lazer (prob lazeri) kullan\u0131larak okunur. <\/p><\/div><\/div><\/div><\/section>

Veri analizi<\/strong> daha sonra silindirik koordinatlarda \u0131s\u0131 iletim denkleminin analitik bir \u00e7\u00f6z\u00fcm\u00fc kullan\u0131larak ger\u00e7ekle\u015ftirilir. \u0130lgili katmanlar\u0131n \u0131s\u0131 ta\u015f\u0131ma \u00f6zelliklerinin belirlenmesi tipik olarak serbest parametrelerin uydurulmas\u0131yla, model taraf\u0131ndan tahmin edilen termal tepki ile deneyde \u00f6l\u00e7\u00fclen numunenin termal tepkisi aras\u0131ndaki sapman\u0131n en aza indirilmesiyle ger\u00e7ekle\u015ftirilir. Serbest parametreler, \u00f6rne\u011fin termal iletkenlik gibi numunenin bilinmeyen \u0131s\u0131 transfer \u00f6zellikleridir. <\/p><\/div><\/div><\/div><\/section>

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TDTR’yi g\u00fcnl\u00fck uygulamada<\/strong> kullan\u0131rken, lazer \u0131\u015f\u0131\u011f\u0131n\u0131n istenmeyen da\u011f\u0131n\u0131k sa\u00e7\u0131l\u0131m\u0131n\u0131 ve dolay\u0131s\u0131yla \u00f6l\u00e7\u00fcm i\u00e7in paraziti \u00f6nlemek i\u00e7in numune y\u00fczeyinin m\u00fcmk\u00fcn oldu\u011funca p\u00fcr\u00fczs\u00fcz olmas\u0131 gerekir.<\/p>

TDTR \u00e7o\u011funlukla kal\u0131nl\u0131k y\u00f6n\u00fcnde, yani y\u00fczeye dik termal iletkenli\u011fi \u00f6l\u00e7mek i\u00e7in kullan\u0131l\u0131r. S\u00fcper kafes yap\u0131lar, dokulu polikristal filmler veya anizotropik kristaller gibi termal olarak anizotropik malzemeler i\u00e7in, d\u00fczlemdeki termal iletkenlik bilgisinin de \u00f6l\u00e7\u00fclmesi gereken yerlerde, d\u00fczlemdeki \u0131s\u0131 ta\u015f\u0131n\u0131m\u0131, yanl\u0131\u015f hizalama yakla\u015f\u0131mlar\u0131 kullan\u0131larak da \u00f6l\u00e7\u00fclebilir. Ancak \u00f6l\u00e7\u00fcm do\u011frulu\u011fu azal\u0131r. <\/p><\/div><\/div><\/div><\/section>

ND:YAG veya Ti:safir lazerler genellikle TDTR kurulumlar\u0131 i\u00e7in “pompa lazerleri” olarak kullan\u0131l\u0131r. Lazer, metal katman\u0131 (d\u00f6n\u00fc\u015ft\u00fcr\u00fcc\u00fc olarak da bilinir) ve dolay\u0131s\u0131yla alttaki numune katman\u0131n\u0131 yerel olarak \u0131s\u0131tmak i\u00e7in optik bir darbe \u00fcretir. S\u0131cakl\u0131k sinyalini okumak i\u00e7in, yerel s\u0131cakl\u0131k art\u0131\u015f\u0131n\u0131 kaydetmek \u00fczere prob lazeri olarak bir s\u00fcrekli dalga lazeri (CW lazer) kullan\u0131l\u0131r. D\u00f6n\u00fc\u015ft\u00fcr\u00fcc\u00fc i\u00e7in kullan\u0131lan malzemeye ba\u011fl\u0131 olarak (\u00f6rne\u011fin Au, Al veya Pt), prob lazerin dalga boyu se\u00e7ilmelidir (~473 nm ila 532 nm veya 785 nm ila 808 nm). <\/p>

“Termoreflektivite” terimi, bir metal filmin yans\u0131tma \u00f6zelli\u011finin “R” s\u0131cakl\u0131\u011f\u0131na “T” ba\u011fl\u0131 oldu\u011fu ger\u00e7e\u011fini ifade eder. Bu da malzemeye \u00f6zg\u00fc termoreflektans katsay\u0131s\u0131 G = dR\/dT ile sonu\u00e7lan\u0131r. Bu katsay\u0131 ne kadar b\u00fcy\u00fck olursa, d\u00f6n\u00fc\u015ft\u00fcr\u00fcc\u00fc katman o kadar hassas olur ve o kadar do\u011fru \u00f6l\u00e7\u00fclebilir. <\/p><\/div><\/div><\/div><\/section><\/div><\/div><\/div><\/div><\/div><\/section>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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\"\"<\/p>

Linseis TF-LFA ile \u00f6l\u00e7\u00fclen farkl\u0131 kal\u0131nl\u0131klara sahip iki SiO2 ince filmin termal dif\u00fczivite \u00f6l\u00e7\u00fcm\u00fcn\u00fcn ham verileri<\/em><\/p><\/div><\/div><\/div><\/section>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Hangi \u00f6zellikler belirlenir?<\/h2>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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TDTR, \u00e7o\u011funlukla ince filmler ve kaplamalar olmak \u00fczere malzemelerin termal ta\u015f\u0131ma \u00f6zelliklerini karakterize<\/strong> etmek ve termal aray\u00fczleri incelemek<\/strong> i\u00e7in kullan\u0131l\u0131r<\/strong>. Elmas ve y\u00fcksek termal iletkenli\u011fe sahip metallerden fulleren t\u00fcrevlerinin ultra d\u00fc\u015f\u00fck termal iletkenli\u011fine kadar t\u00fcm termal iletkenlik aral\u0131\u011f\u0131nda uygulanm\u0131\u015ft\u0131r. Esasen ayn\u0131 y\u00f6ntem d\u00f6kme malzemelere, ince filmlere ve tekli aray\u00fczlere uygulanabilir. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Zaman etki alan\u0131 termoreflektans\u0131 (TDTR) Zaman etki alan\u0131 termoreflektans\u0131 (TDTR) Son on y\u0131lda, TDTR – Zaman Alan\u0131 Termoreflektans \u00d6l\u00e7\u00fcm Teknolojisi, kaplamalar\u0131n ve ince filmlerin termal ta\u015f\u0131n\u0131m \u00f6zelliklerini \u00f6l\u00e7mek i\u00e7in g\u00fc\u00e7l\u00fc ve evrensel olarak uygulanabilir bir ara\u00e7 haline gelmi\u015ftir. \u00d6l\u00e7\u00fcm tekni\u011fi, hem termal ta\u015f\u0131ma \u00f6zellikleri hem de numune geometrisi a\u00e7\u0131s\u0131ndan \u00e7ok \u00e7e\u015fitli numunelere uygulanabilir. Ayr\u0131ca, numunelerin […]<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":113451,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-113502","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/pages\/113502","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/comments?post=113502"}],"version-history":[{"count":0,"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/pages\/113502\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/pages\/113451"}],"wp:attachment":[{"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/media?parent=113502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}