{"id":9572,"date":"2026-05-29T16:06:50","date_gmt":"2026-05-29T08:06:50","guid":{"rendered":"https:\/\/rysilicone.com\/?p=9572"},"modified":"2026-05-29T16:08:03","modified_gmt":"2026-05-29T08:08:03","slug":"silicone-thermal-conductivity","status":"publish","type":"post","link":"https:\/\/rysilicone.com\/tr\/silicone-thermal-conductivity\/","title":{"rendered":"Silikonun Is\u0131 \u0130letkenli\u011fi ve S\u0131cakl\u0131k Aral\u0131\u011f\u0131: De\u011ferler, S\u0131n\u0131rlar ve Malzeme Kar\u015f\u0131la\u015ft\u0131rmas\u0131"},"content":{"rendered":"

E\u011fer \u0131s\u0131nan veya so\u011fuyan bir par\u00e7a i\u00e7in silikon spesifikasyonu yap\u0131yorsan\u0131z, kimya dersi de\u011fil, iki say\u0131 ve bir s\u0131n\u0131r de\u011feri gerekir. \u00c7o\u011fu sayfa bu say\u0131lar\u0131 ansiklopedik bilgilerle gizler, bu y\u00fczden al\u0131c\u0131lar tek sat\u0131rda okuyabilecekleri \u015feyi sormak i\u00e7in bizi arayarak zamanlar\u0131n\u0131 bo\u015fa harcarlar.<\/p>\n\n\n\n

Silikonun \u0131s\u0131 iletkenli\u011fi d\u00fc\u015f\u00fckt\u00fcr (yakla\u015f\u0131k 0,2 W\/m\u00b7K) ve standart s\u00fcrekli \u00e7al\u0131\u015fma aral\u0131\u011f\u0131 -60\u00b0C ile +230\u00b0C aras\u0131ndad\u0131r. Seramik veya metal katk\u0131 maddeleriyle doldurulmad\u0131\u011f\u0131 s\u00fcrece \u0131s\u0131y\u0131 iletmek yerine yal\u0131t\u0131r.<\/strong><\/p>\n\n\n\n

A\u015fa\u011f\u0131daki her \u015fey o c\u00fcmlenin ard\u0131ndaki detaylard\u0131r: de\u011ferler, limitlerin ger\u00e7ekte nerede oldu\u011fu ve silikonun genellikle rekabet etti\u011fi kau\u00e7uklarla nas\u0131l kar\u015f\u0131la\u015ft\u0131r\u0131ld\u0131\u011f\u0131.<\/p>\n\n\n\n

\"Silikon
Silikon kau\u00e7uk, s\u0131cak taraftaki \u0131s\u0131 ak\u0131\u015f\u0131n\u0131 engeller ve di\u011fer taraf\u0131 serin tutar; yani \u0131s\u0131 iletkeni de\u011fil, \u0131s\u0131 yal\u0131tkan\u0131d\u0131r.<\/figcaption><\/figure>\n\n\n\n

<\/p>\n\n\n\n

Silikonun Is\u0131 \u0130letkenli\u011fi Nedir?<\/h2>\n\n\n\n

Dolgusuz silikon kau\u00e7uk (VMQ) yakla\u015f\u0131k 0,2 W\/m\u00b7K de\u011ferindedir ve bu de\u011fer genellikle \u015fu \u015fekilde belirtilir: 0,1\u20130,4 W\/m\u00b7K band\u0131<\/a> Kaliteye ve dolgu maddesi y\u00fck\u00fcne ba\u011fl\u0131 olarak. Temel polimer olan PDMS, yakla\u015f\u0131k 0,15 W\/m\u00b7K \u00f6l\u00e7\u00fclerindedir.<\/a>, Ve -50 ila 150\u00b0C aral\u0131\u011f\u0131nda laboratuvar \u00f6l\u00e7\u00fcmleri.<\/a> D\u00fc\u015f\u00fck s\u0131cakl\u0131k aral\u0131\u011f\u0131nda tutun. Referans olarak, bak\u0131r yakla\u015f\u0131k 400 W\/m\u00b7K ve al\u00fcminyum yakla\u015f\u0131k 200 W\/m\u00b7K'dir. Yani silikon bir \u0131s\u0131 iletkeni de\u011fildir. \u00c7o\u011fu plasti\u011fin dayanamad\u0131\u011f\u0131 s\u0131cakl\u0131klara dayanabilen bir \u0131s\u0131 yal\u0131tkan\u0131d\u0131r.<\/p>\n\n\n\n

Al\u0131c\u0131lar\u0131n g\u00f6zden ka\u00e7\u0131rd\u0131\u011f\u0131 nokta i\u015fte bu: bir \u00e7izimde "\u0131s\u0131 i\u00e7in silikon" deniyorsa, bu neredeyse her zaman \u0131s\u0131 anlam\u0131na gelir. rezistans<\/em>, \u0131s\u0131 de\u011fil transfer<\/em>. Bunlar birbirinin z\u0131t gereksinimleridir ve malzeme se\u00e7imini farkl\u0131 y\u00f6nlere \u00e7ekerler.<\/p>\n\n\n\n

Cihazla ilgili k\u0131sa bir bilgilendirme: Is\u0131 iletkenli\u011fi (W\/m\u00b7K), \u0131s\u0131n\u0131n ne kadar h\u0131zl\u0131 iletildi\u011fini g\u00f6sterir. ba\u015f\u0131ndan sonuna kadar<\/em> Bir malzeme. D\u00fc\u015f\u00fck bir say\u0131, \u0131s\u0131n\u0131n yava\u015f hareket etti\u011fi anlam\u0131na gelir; bu nedenle dokundu\u011funuz y\u00fczey daha so\u011fuk kal\u0131rken di\u011fer taraf \u0131s\u0131n\u0131r. Bu, bir tutamak veya conta i\u00e7in tam olarak istedi\u011finiz davran\u0131\u015ft\u0131r ve \u0131s\u0131y\u0131 ger\u00e7ekten iletmeniz gerekti\u011finde dolgu malzemeleriyle tam olarak bu davran\u0131\u015f\u0131 dikkate alman\u0131z gerekir.<\/p>\n\n\n\n

Is\u0131 \u0130letken Silikon (Dolgulu \u00c7e\u015fitler)<\/h3>\n\n\n\n

Is\u0131 transferi s\u00f6z konusu oldu\u011funda \u2014 i\u015flemci veya g\u00fc\u00e7 mod\u00fcl\u00fc alt\u0131ndaki termal pedler, bo\u015fluk doldurucular, termal aray\u00fcz malzemeleri (TIM) \u2014 temel silikon kullanm\u0131yoruz. Bunun yerine, al\u00fcmina, bor nitr\u00fcr veya metal oksit dolgu maddeleriyle zenginle\u015ftiriyoruz.<\/p>\n\n\n\n

\"Is\u0131
Is\u0131 da\u011f\u0131t\u0131c\u0131s\u0131n\u0131n alt\u0131nda, devre kart\u0131 \u00fczerindeki gri silikon termal aray\u00fcz pedi.<\/figcaption><\/figure>\n\n\n\n
Silikon tipi<\/strong><\/th>Is\u0131 iletkenli\u011fi (W\/m\u00b7K)<\/strong><\/th>Tipik kullan\u0131m<\/strong><\/th><\/tr><\/thead>
Doldurulmam\u0131\u015f VMQ<\/td>~0.2<\/td>Contalar, s\u0131zd\u0131rmazl\u0131k elemanlar\u0131, izolasyon, genel kal\u0131planm\u0131\u015f par\u00e7alar<\/td><\/tr>
Hafif\u00e7e doldurulmu\u015f<\/td>0,5\u20131,0<\/td>Temel termal pedler<\/td><\/tr>
Is\u0131 iletken (yo\u011fun dolgulu)<\/td>1.0\u20135.0+<\/td>TIM, g\u00fc\u00e7 elektroni\u011fi alt\u0131ndaki bo\u015fluk doldurucular<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Buradaki denge mekanikseldir: Ne kadar \u00e7ok iletken dolgu maddesi koyarsan\u0131z, o kadar az iletken olur. daha sert ve daha az esnek<\/a> Par\u00e7a bu \u00f6zellikleri ta\u015f\u0131yor. \u0130letkenli\u011fi esneklikle birle\u015ftiriyorsunuz. Bu gerilim, tek bir \u00f6zellik sat\u0131r\u0131ndan ziyade, kalite se\u00e7imini belirliyor.<\/p>\n\n\n\n

Dolgu kimyas\u0131 tavan\u0131 belirler. Al\u00fcmina (al\u00fcminyum oksit) en \u00e7ok kullan\u0131lan malzemedir; ucuz, kararl\u0131 ve pratik y\u00fcklemelerde yakla\u015f\u0131k 1-3 W\/m\u00b7K iletkenli\u011fe sahiptir. Bor nitr\u00fcr daha y\u00fcksek de\u011ferlere, yakla\u015f\u0131k 3-6 W\/m\u00b7K'ye ula\u015f\u0131rken elektriksel olarak yal\u0131tkan kal\u0131r; bu nedenle g\u00fc\u00e7 elektroni\u011fi alt\u0131ndaki termal aray\u00fcz malzemelerinde kullan\u0131l\u0131r. Elektriksel yal\u0131t\u0131m\u0131n gerekli olmad\u0131\u011f\u0131 durumlarda, grafit ve metal y\u00fckl\u00fc kaliteler daha da y\u00fcksek de\u011ferlere ula\u015f\u0131r, ancak silikonu ilk etapta \u00e7ekici k\u0131lan dielektrik dayan\u0131m\u0131ndan vazge\u00e7erler. Se\u00e7im kural\u0131 k\u0131sad\u0131r: Termal b\u00fct\u00e7enizi kar\u015f\u0131layan en d\u00fc\u015f\u00fck iletkenli\u011fi se\u00e7in, \u00e7\u00fcnk\u00fc her ekstra W\/m\u00b7K puan\u0131 uzama, y\u0131rt\u0131lma dayan\u0131m\u0131 ve tak\u0131m \u00f6mr\u00fcnden \u00f6d\u00fcn vermenize neden olur.<\/p>\n\n\n\n

Silikon S\u0131cakl\u0131k Aral\u0131\u011f\u0131 ve Is\u0131ya Dayan\u0131kl\u0131l\u0131\u011f\u0131<\/h2>\n\n\n\n

Bu ikinci say\u0131 ve silikonun daha ucuz kau\u00e7uklara g\u00f6re \u00fcst\u00fcnl\u00fc\u011f\u00fcn\u00fc sa\u011flad\u0131\u011f\u0131 nokta buras\u0131. Is\u0131 direnci asl\u0131nda \u00fc\u00e7 soruyu birden i\u00e7eriyor: par\u00e7an\u0131n s\u00fcrekli olarak ne kadar \u0131s\u0131nd\u0131\u011f\u0131, ani s\u0131cakl\u0131k art\u0131\u015flar\u0131 ve di\u011fer u\u00e7ta ne kadar so\u011fudu\u011fu. Bir kalite bu \u00fc\u00e7\u00fcn\u00fc de kar\u015f\u0131lamal\u0131 ve aralar\u0131ndaki bo\u015fluk tam olarak yanl\u0131\u015f malzemenin belirtildi\u011fi yerdir.<\/p>\n\n\n\n

\"S\u0131cak
S\u0131cak metal flan\u015f\u0131n yak\u0131n\u0131nda k\u0131rm\u0131z\u0131 silikon contalar ve O-ringler.<\/figcaption><\/figure>\n\n\n\n

Standart S\u00fcrekli \u00c7al\u0131\u015fma Aral\u0131\u011f\u0131<\/h3>\n\n\n\n

Standart silikon, -60\u00b0C ile +230\u00b0C aras\u0131nda s\u00fcrekli olarak \u00e7al\u0131\u015f\u0131r. Bu aral\u0131k, \u00e7o\u011fu s\u0131zd\u0131rmazl\u0131k, conta ve mutfak e\u015fyas\u0131 i\u015finde teredd\u00fct etmeden kullanabilece\u011fimiz kadar kararl\u0131d\u0131r. "S\u00fcrekli" kelimesi burada kilit noktad\u0131r: Par\u00e7an\u0131n sertli\u011fi, \u00e7ekme dayan\u0131m\u0131 veya s\u0131zd\u0131rmazl\u0131k kuvveti spesifikasyon d\u0131\u015f\u0131na \u00e7\u0131kmadan t\u00fcm kullan\u0131m \u00f6mr\u00fc boyunca dayanabilece\u011fi s\u0131cakl\u0131kt\u0131r. Bu, tek seferlik bir hayatta kalma rakam\u0131 de\u011fil, veri sayfas\u0131na dayal\u0131, muhafazakar bir rakamd\u0131r.<\/p>\n\n\n\n

Y\u00fcksek S\u0131cakl\u0131k Davran\u0131\u015f\u0131<\/h3>\n\n\n\n

Y\u00fcksek s\u0131cakl\u0131k s\u0131n\u0131flar\u0131, 250-300\u00b0C'ye k\u0131sa s\u00fcreli \u00e7\u0131k\u0131\u015flar yapabilir. "K\u0131sa" olmas\u0131 \u00f6nemlidir: bir conta k\u0131sa bir s\u00fcre i\u00e7in 280\u00b0C'ye kadar \u00e7\u0131kabilir ve normale d\u00f6nebilir, ancak bu s\u0131cakl\u0131\u011f\u0131 s\u00fcrekli olarak korursan\u0131z kullan\u0131m \u00f6mr\u00fcn\u00fc k\u0131salt\u0131rs\u0131n\u0131z. Her zaman ay\u0131r\u0131n. tepe s\u0131cakl\u0131\u011f\u0131<\/strong> itibaren s\u00fcrekli \u00e7al\u0131\u015fma s\u0131cakl\u0131\u011f\u0131<\/strong> Veri sayfas\u0131nda belirtilen en y\u00fcksek de\u011feri \u00e7al\u0131\u015fma de\u011feri olarak okuyan al\u0131c\u0131lar, sertle\u015fmi\u015f ve k\u0131r\u0131lgan par\u00e7alar hakk\u0131nda geri d\u00f6n\u00fc\u015f yapanlard\u0131r.<\/p>\n\n\n\n

Seviye<\/strong><\/th>S\u00fcrekli hizmet<\/strong><\/th>K\u0131sa zirve<\/strong><\/th><\/tr><\/thead>
Standart VMQ<\/td>-60 ila +230\u00b0C<\/td>~250\u00b0C<\/td><\/tr>
Y\u00fcksek s\u0131cakl\u0131k VMQ<\/td>+230 ila +250\u00b0C<\/td>~300\u00b0C<\/td><\/tr>
Is\u0131ya dayan\u0131kl\u0131 VMQ<\/td>+260\u00b0C'ye kadar<\/td>~315\u00b0C<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Is\u0131ya dayan\u0131kl\u0131 kaliteler, s\u00fcrekli \u00e7al\u0131\u015fma s\u0131cakl\u0131\u011f\u0131n\u0131 260\u00b0C'ye do\u011fru \u00e7\u0131karmak i\u00e7in demir oksit ve di\u011fer termal katk\u0131 maddeleri kullan\u0131r. Daha pahal\u0131d\u0131rlar ve ancak par\u00e7a ger\u00e7ekten binlerce saat boyunca bu aral\u0131kta kald\u0131\u011f\u0131nda buna de\u011ferdirler; ani s\u0131cakl\u0131k art\u0131\u015flar\u0131 ve ard\u0131ndan so\u011fumalar g\u00f6steren bir i\u015flem i\u00e7in de\u011fil.<\/p>\n\n\n\n

D\u00fc\u015f\u00fck S\u0131cakl\u0131k Davran\u0131\u015f\u0131<\/h3>\n\n\n\n

Silikon, \u00e7o\u011fu elastomerden \u00e7ok daha d\u00fc\u015f\u00fck s\u0131cakl\u0131klarda esnekli\u011fini korur. Standart kaliteler yakla\u015f\u0131k -60\u00b0C'ye kadar dayan\u0131r; florosilikon (FVMQ) ise yakla\u015f\u0131k -73\u00b0C'ye kadar dayan\u0131r. Bunun alt\u0131nda, malzeme sertle\u015fir ve sonunda k\u0131r\u0131lgan hale gelir. D\u00fc\u015f\u00fck s\u0131cakl\u0131k k\u0131r\u0131lganl\u0131\u011f\u0131 \u015fu de\u011ferler alt\u0131nda \u00f6l\u00e7\u00fcl\u00fcr: ASTM D746<\/a>, Ve bu, so\u011fuk zincir, havac\u0131l\u0131k veya d\u0131\u015f mekan k\u0131\u015f uygulamalar\u0131 i\u00e7in kontrol edilmesi gereken say\u0131d\u0131r. So\u011fuk u\u00e7taki ar\u0131za modu, ilk g\u00fcn \u00e7atlama de\u011fil, kademeli bir geri tepme kayb\u0131d\u0131r. So\u011fukta camla\u015fm\u0131\u015f bir conta geri yaylanmay\u0131 b\u0131rak\u0131r ve statik bir ba\u011flant\u0131 sessizce s\u0131zd\u0131rmaya ba\u015flar. Bu nedenle, \u00e7izimde yer almas\u0131 gereken say\u0131 katalogdaki minimum s\u0131cakl\u0131k de\u011fil, k\u0131r\u0131lganl\u0131k noktas\u0131d\u0131r.<\/p>\n\n\n\n

Termal Ya\u015flanma<\/h3>\n\n\n\n

Is\u0131 direnci tek bir anl\u0131k bir durum de\u011fil, par\u00e7an\u0131n binlerce saat boyunca y\u00fcksek \u0131s\u0131ya maruz kald\u0131ktan sonraki davran\u0131\u015f\u0131d\u0131r. Uzun s\u00fcreli \u0131s\u0131 ya\u015flanmas\u0131 \u015fu kriterler alt\u0131nda de\u011ferlendirilir: ASTM D573<\/a>, Bu, uzun s\u00fcreli maruz kalma sonras\u0131nda sertlik, \u00e7ekme dayan\u0131m\u0131 ve uzamadaki de\u011fi\u015fiklikleri \u00f6l\u00e7er. Bu, "230\u00b0C" olarak derecelendirilen bir kaliteyi, yaln\u0131zca bir kez 230\u00b0C'ye dayanabilen bir kaliteden ay\u0131ran \u015feydir. Uygulamada, \u00fc\u00e7 ya\u015flanma \u00e7\u0131kt\u0131s\u0131n\u0131 birlikte okuruz: sertlikte art\u0131\u015f (kau\u00e7uk cams\u0131 hale gelir), uzamada d\u00fc\u015f\u00fc\u015f (gerilmek yerine \u00e7atlar) ve \u00e7ekme dayan\u0131m\u0131nda kay\u0131p. Bir al\u0131c\u0131, par\u00e7alar\u0131n kullan\u0131m s\u0131ras\u0131nda k\u0131r\u0131lgan hale geldi\u011fini bildirdi\u011finde, bu neredeyse her zaman k\u00f6t\u00fc bir parti de\u011fil, ya\u015flanma ile s\u0131cakl\u0131k aras\u0131ndaki uyumsuzluktur.<\/p>\n\n\n\n

Silikon ve Di\u011fer Elastomerler: Termal Kar\u015f\u0131la\u015ft\u0131rma<\/h2>\n\n\n\n

Silikonun \u0131s\u0131 yal\u0131t\u0131m performans\u0131 alternatiflerine g\u00f6re hangi noktalarda daha iyi, hangi noktalarda daha k\u00f6t\u00fc? Tipik g\u00f6sterge de\u011ferleri:<\/p>\n\n\n\n

Malzeme<\/strong><\/th>Is\u0131 iletkenli\u011fi (W\/m\u00b7K)<\/strong><\/th>Maksimum s\u00fcrekli s\u0131cakl\u0131k<\/strong><\/th>D\u00fc\u015f\u00fck s\u0131cakl\u0131k limiti<\/strong><\/th><\/tr><\/thead>
Silikon (VMQ)<\/td>~0.2<\/td>230\u00b0C (zirveler ~300\u00b0C)<\/td>-60\u00b0C (FVMQ ~-73\u00b0C)<\/td><\/tr>
NBR (nitril)<\/td>~0.25<\/td>100\u2013120\u00b0C<\/td>-30\u00b0C<\/td><\/tr>
EPDM<\/td>~0.35<\/td>130\u2013150\u00b0C<\/td>-50\u00b0C<\/td><\/tr>
PTFE<\/td>~0.25<\/td>260\u00b0C<\/td>-200\u00b0C<\/td><\/tr>
FKM (Viton)<\/td>~0.20<\/td>200\u2013230\u00b0C<\/td>-20\u00b0C<\/td><\/tr>
Do\u011fal kau\u00e7uk<\/td>~0.15<\/td>70\u201390\u00b0C<\/td>-50\u00b0C<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\"S\u00fcrekli
S\u00fcrekli \u00e7al\u0131\u015fma s\u0131cakl\u0131\u011f\u0131 aral\u0131\u011f\u0131 kar\u015f\u0131la\u015ft\u0131rmas\u0131: silikon ile florosilikon, PTFE, EPDM ve NBR<\/figcaption><\/figure>\n\n\n\n

<\/p>\n\n\n\n

Tabloyu uygulama s\u0131n\u0131r\u0131na g\u00f6re okuma:<\/p>\n\n\n\n