Aluminium Nitride (AlN) tau tsim thawj zaug hauv xyoo 1877, tab sis nws cov peev txheej hauv microelectronics tsis tau txhawb kev tsim cov khoom zoo, cov khoom lag luam mus txog rau nruab nrab-1980s.
AIN yog ib daim ntawv txhuas nitrate. Aluminium nitride txawv ntawm txhuas nitrate nyob rau hauv hais tias nws yog ib tug nitrogen compound nrog ib tug tshwj xeeb oxidation lub xeev ntawm -3, thaum nitrate yog hais txog tej ester los yog ntsev ntawm nitric acid. Cov khoom siv lead ua no yog hexagonal wurtzite.
Synthesis of AIN
AlN yog tsim los ntawm ob qho tib si carbothermal txo ntawm alumina lossis ncaj qha nitridation ntawm txhuas. Nws muaj qhov ceev ntawm 3.33 g / cm3 thiab, txawm tias tsis yaj, dissociates ntawm qhov kub siab tshaj 2500 ° C thiab atmospheric siab. Yog tsis muaj kev pab ntawm cov kua-forming additives, cov khoom yog covalently bonded thiab resistant rau sintering. Feem ntau, oxides xws li Y2O3 lossis CaO tso cai rau sintering ntawm qhov kub ntawm 1600 thiab 1900 degrees Celsius.
Cov khoom ua los ntawm txhuas nitride tuaj yeem tsim los ntawm ntau txoj hauv kev, suav nrog kev txias isostatic nias, ceramic txhaj molding, tsis tshua muaj siab txhaj molding, daim kab xev casting, precision machining, thiab qhuav nias.
Ntsiab nta
AlN yog impervious rau feem ntau molten hlau, xws li txhuas, lithium, thiab tooj liab. Nws yog impervious rau feem ntau ntawm molten ntsev, nrog rau chlorides thiab cryolite.
Aluminium nitride muaj cov thermal conductivity siab (170 W / mk, 200 W / mk, thiab 230 W / mk) nrog rau cov ntim siab thiab lub zog dielectric.
Nws yog qhov raug rau hydrolysis nyob rau hauv hmoov daim ntawv thaum raug dej los yog av noo. Tsis tas li ntawd, acids thiab alkalis tawm tsam aluminium nitride.
Cov khoom no yog ib qho insulator rau hluav taws xob. Doping txhim kho cov hluav taws xob conductivity ntawm cov khoom. AIN qhia txog piezoelectric zog.
Daim ntawv thov
Microelectronics
Qhov zoo tshaj plaws yam ntxwv ntawm AlN yog nws cov thermal conductivity, uas yog thib ob tsuas yog beryllium ntawm cov ntaub ntawv ceramic. Thaum kub hauv qab 200 degrees Celsius, nws thermal conductivity tshaj tooj liab. Qhov kev sib xyaw ua ke ntawm cov khoom siv hluav taws xob siab, ntim cov khoom tiv thaiv, thiab lub zog dielectric ua rau nws siv los ua cov khoom siv substrate thiab ntim rau cov khoom siv hluav taws xob siab lossis cov khoom siv high-density microelectronic. Qhov yuav tsum tau dissipate tshav kub generated los ntawm ohmic losses thiab tswj cov Cheebtsam nyob rau hauv lawv cov kev khiav hauj lwm kub ntau yam yog ib tug ntawm cov limiting yam uas txiav txim siab qhov ceev ntawm packing ntawm hluav taws xob Cheebtsam. AlN substrates muab kev ua kom txias zoo dua li cov pa thiab lwm yam ceramic substrates, uas yog vim li cas lawv tau siv los ua cov khoom siv nti thiab cov dab dej kub.
Aluminium nitride pom cov ntawv thov kev lag luam thoob plaws hauv RF lim rau cov khoom siv sib txuas lus txawb. Ib txheej ntawm aluminium nitride nyob nruab nrab ntawm ob txheej hlau. Cov ntawv thov hauv kev lag luam muaj xws li hluav taws xob rwb thaiv tsev thiab kev tswj xyuas kub hauv lasers, chiplets, collets, hluav taws xob insulators, clamp rings nyob rau hauv semiconductor ua khoom, thiab microwave ntaus ntawv ntim.
Lwm Cov Ntawv Thov
Vim yog cov nuj nqis ntawm AlN, nws cov ntawv thov muaj keeb kwm raug txwv rau cov tub rog aeronautics thiab kev thauj mus los. Txawm li cas los xij, cov khoom siv tau raug tshawb fawb thiab siv ntau yam. Nws cov khoom muaj txiaj ntsig ua rau nws tsim nyog rau ntau cov ntawv thov kev lag luam tseem ceeb.
AlN cov ntawv thov kev lag luam suav nrog cov khoom siv hluav taws xob refractory los tuav cov hlau hnyav hnyav thiab cov khoom siv hluav taws xob zoo.
Cov khoom no yog siv los tsim cov crucibles rau kev loj hlob ntawm gallium arsenide crystals thiab kuj yog siv nyob rau hauv zus tau tej cov steel thiab semiconductors.
Lwm qhov kev thov siv rau txhuas nitride suav nrog ua tshuaj lom neeg rau cov pa phem. Siv AIN nanotubes los tsim quasi-ib-dimensional nanotubes siv rau hauv cov khoom siv no yog qhov kev tshawb fawb. Hauv ob xyoos dhau los, lub teeb-emitting diodes uas ua haujlwm hauv ultraviolet spectrum kuj tau tshawb xyuas. Daim ntawv thov ntawm nyias zaj duab xis AIN nyob rau hauv nto acoustic yoj sensors tau raug soj ntsuam.
