Silicon nitride (Si3N4) yog qhov kev xaiv tseem ceeb rau ntau yam kev lag luam vim nws cov khoom tshwj xeeb thermal. Thermal conductivity yog ib qho tseem ceeb parameter uas characterizes cov khoom muaj peev xwm ua cua sov. Feem ntau, silicon nitride muaj cov thermal conductivity ntawm 20 mus rau 40 (W / mK), uas yog siab heev rau cov khoom siv ceramic. Cov cuab yeej no yog qhov tseem ceeb rau cov ntawv thov uas hloov cov cua sov kom zoo thiab kev tswj xyuas thermal yog qhov tseem ceeb.
Tej yam cuam tshuam rau Thermal Conductivity
siv lead ua Crystal Structure
Ib qho tseem ceeb pab txhawb rau silicon nitride lub siab thermal conductivity yog nws cov qauv siv lead ua. Silicon nitride muaj nyob rau hauv ntau hom polymorphic, tab sis feem ntau yog lub hexagonal alpha theem. Lub hexagonal siv lead ua qauv, ua ke nrog cov muaj zog covalent bonds ntawm silicon thiab nitrogen atoms, pab txhawb kom muaj cua sov conduction los ntawm cov khoom.
- Kev sib xyaw
Lwm yam cuam tshuam rau silicon nitride lub thermal conductivity yog nws muaj pes tsawg leeg. Silicon nitride ceramics feem ntau yog engineered nrog ntau yam additives los txhim kho cov khoom tshwj xeeb. Qee qhov piv txwv suav nrog ntxiv yttria (yttrium oxide) ua ib qho kev pabcuam sintering los ua silicon nitride denser, uas ua rau nws zoo dua ntawm kev ua cua sov.
- Kub
Qhov kub dependence ntawm silicon nitride thermal conductivity kuj tseem ceeb. Feem ntau, cov thermal conductivity ntawm ceramics zoo li txo nrog qhov kub thiab txias vim phonon-phonon tawg thiab lwm yam thermal kuj mechanisms. Txawm li cas los xij, silicon nitride nthuav tawm cov thermal conductivity nyob rau hauv qhov dav ntawm qhov kub thiab txias, ua rau nws tsim nyog rau cov ntawv thov uas muaj qhov kub thiab txias.
Kev siv ntawm Silicon Nitride
Kev siv ntawm silicon nitride, nrog nws cov thermal conductivity zoo heev, hla thoob plaws ntau yam kev lag luam. Nws yog feem ntau siv hauv kev tsim cov khoom siv hluav taws xob ua haujlwm siab rau kev siv xws li cov cuab yeej txiav, bearings, thiab cov dab dej kub. Hauv cov khoom siv hluav taws xob, silicon nitride yog siv los ua lub substrate rau kev sib xyaw ua ke thiab ua ib feem hauv kev tswj xyuas thermal.
Hauv cov ntsiab lus, silicon nitride thermal conductivity yog cov cuab yeej tseem ceeb uas ua rau nws muaj txiaj ntsig zoo hauv ntau daim ntawv thov kev lag luam. Nws cov thermal conductivity siab, ua ke nrog lwm cov yam ntxwv tsim nyog xws li lub zog siab thiab tshuaj lom neeg, ua haujlwm silicon nitride ua ntau yam khoom siv rau kev sib tw ib puag ncig qhov kev hloov pauv hluav taws xob yog qhov tseem ceeb.
