Aluminium nitride (AlN) yog ib qho kev sib xyaw ua ke nrog ntau yam khoom tshwj xeeb. Nws yog cov khoom siv ceramic uas nthuav tawm cov thermal conductivity zoo heev, hluav taws xob rwb thaiv tsev, thiab kub-kub stability. Hauv tsab xov xwm no, ntau yam khoom ntawm txhuas nitride yuav raug tshawb xyuas kom meej.
Crystal Structure
Aluminium nitride crystallizes nyob rau hauv hexagonal wurtzite qauv. Nws muaj cov txheej txheem kaw ntom ntom ntawm txhuas thiab nitrogen atoms, ua kom muaj zog covalent bonds nyob rau hauv siv lead ua lattice.
Thermal conductivity
Ib qho ntawm cov khoom tseem ceeb ntawm aluminium nitride yog nws cov thermal conductivity. Nws muaj cov txiaj ntsig thermal conductivity xws li 140 txog 320 W / m·K, uas zoo dua rau lwm cov ntaub ntawv ceramic. Qhov no thermal conductivity ua rau nws yog ib qho kev xaiv zoo tshaj plaws rau cov dab dej kub thiab cov khoom siv hluav taws xob hauv hluav taws xob, qhov twg cov cua sov dissipation yog qhov tseem ceeb heev.
Hluav taws xob rwb thaiv tsev
Aluminium nitride yog ib qho hluav taws xob zoo heev. Nws muaj ib tug high breakdown voltage thiab tsawg dielectric tsis tu ncua. Cov khoom no ua rau nws tsim nyog rau cov ntawv thov hauv cov khoom siv hluav taws xob siab, xws li cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob sib xyaw ua ke, qhov kev sib cais hluav taws xob yog qhov tseem ceeb.
Mechanical Strength
Txawm hais tias yog cov khoom siv ceramic, aluminium nitride nthuav tawm lub zog ua haujlwm siab. Nws muaj lub siab elastic modulus, feem ntau nyob ib ncig ntawm 330 GPa, uas ua rau nws haum rau daim ntaub ntawv uas yuav tsum tau muaj kev ncaj ncees thiab tsis kam mus rau txhua yam kev nyuaj siab.
Thermal Expansion
Lub coefficient ntawm thermal expansion (CTE) ntawm aluminium nitride yog qhov tsawg dua piv rau lwm cov ceramics. Nws sib raug zoo nrog cov silicon, uas yog ib qho tseem ceeb rau kev ua tau zoo thermal cycling kev ntseeg siab nyob rau hauv electronic ntim daim ntaub ntawv uas aluminium nitride feem ntau siv los ua ib tug substrate.
Optical Properties
Aluminium nitride yog pob tshab rau ultraviolet (UV) lub teeb thiab nthuav tawm lub zog ntawm lub zog ntawm 6eV. Qhov no ua rau nws muaj txiaj ntsig zoo rau cov khoom siv optoelectronic, xws li UV teeb-emitting diodes (LEDs) thiab photodetectors.
Tshuaj Stability
Aluminium nitride yog tshuaj ruaj khov nyob rau hauv ntau qhov chaw, nrog rau oxidizing atmospheres. Nws tiv taus los ntawm feem ntau cov kua qaub thiab alkalis, tshwj tsis yog hydrofluoric acid (HF). Qhov kev ruaj ntseg tshuaj no ua rau nws tsim nyog rau cov ntawv thov hauv ib puag ncig hnyav thiab ua cov txheej tiv thaiv rau lwm cov ntaub ntawv.
Piezoelectricity
Aluminium nitride muaj piezoelectric zog, txhais tau tias nws tuaj yeem tsim hluav taws xob thaum raug kev ntxhov siab los yog tuaj yeem hloov cov duab thaum siv hluav taws xob. Cov cuab yeej no ua rau nws muaj txiaj ntsig rau cov ntawv thov hauv sensors, actuators, thiab microelectromechanical systems (MEMS).
Kub-kub Stability
Aluminium nitride nthuav tawm kev ruaj ntseg zoo ntawm qhov kub thiab txias. Nws tuaj yeem tiv taus qhov kub txog li 1000 degree yam tsis muaj kev puas tsuaj loj hauv nws cov khoom, ua rau nws tsim nyog rau kev siv nyob rau hauv qhov chaw kub kub, xws li aerospace thiab automotive industries.
Chemical thiab Biological Sensing
Vim nws qhov chaw siab thiab tshuaj lom neeg ruaj khov, aluminium nitride yog siv rau hauv kev siv tshuaj lom neeg thiab tshuaj lom neeg. Nws qhov chaw tuaj yeem ua haujlwm tau los xaiv khi lub hom phiaj molecules, ua kom pom cov pa roj, kua, thiab biomolecules.
