Molybdenum Silicide, MoSi2

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Molybdenum Silicide, MoSi2

Molybdenum disilicide (Molybdenumdisilicide, MoSi2) ndi mtundu wa mankhwala a silicon molybdenum, chifukwa magawo awiri a atomiki anali ofanana, mphamvu yamagetsi yoyandikira kwambiri, motero imafanana ndi mtundu wachitsulo ndi ceramic.


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Molybdenum disilicide (Molybdenumdisilicide, MoSi2) ndi mtundu wa mankhwala a silicon molybdenum, chifukwa magawo awiri a atomiki anali ofanana, mphamvu yamagetsi yoyandikira kwambiri, chifukwa chake imafanana ndi mtundu wachitsulo ndi ceramic. Ndi malo osungunuka mpaka 2030 ℃ ndi magetsi madutsidwe, silicon dioxide yosanjikiza yosanjikiza imatha kupangidwa pamtunda kutentha kwambiri kuti ipewe makutidwe ndi okosijeni ena. Maonekedwe ake ndi utoto wachitsulo, womwe umachokera ku kapangidwe kake kama quadric - kristalo, ndipo palinso mbali zinayi koma zosakhazikika -modified crystal dongosolo. Osasungunuka m'matenda ambiri, koma osungunuka mu nitric acid ndi hydrofluoric acid.
MoSi2 ndi mtundu wa mesophase wokhala ndi ma silicon kwambiri mu mo-SI binary alloy system.Ndi mtundu wazinthu zotentha kwambiri zomwe zimakhala ndi magwiridwe antchito abwino.Good high kutentha oxidation kukana, kutentha kwa okosijeni mpaka 1600 equivalent, yofanana ndi SiC; kachulukidwe (6.24g / cm3); Kuchulukitsa kocheperako kotsika (8.1 × 10-6K-1); Magulu abwino amagetsi; Kutentha kofulumira kwa ductile (1000 ℃) pansi pa ceramic - ngati kulimba kolimba. Pa 1000 ℃ pamwamba pazitsulo ngati pulasitiki wofewa.MoSi imagwiritsidwa ntchito kwambiri ngati chinthu chotenthetsera, dera losakanikirana, kutentha kwambiri kosagwirizana ndi makutidwe ndi okosijeni komanso kutentha kwambiri. Mu MoSi2, molybdenum ndi silicon zimalumikizidwa ndi maunyolo azitsulo, silicon ndi silicon zimalumikizidwa ndi ma covalent bonds, ndi molybdenum disilicide Imakhala yosungunuka m'madzi amchere amchere (kuphatikiza aqua aqua), koma imasungunuka musakanikirana ndi asidi wa nitric ndi hydrofluoric acid, imakhala ndi kutentha kwambiri kwa antioxidant ndipo imatha itenthedwe ngati kutentha kwambiri (& LT; Kutenthetsa zinthu komwe kumagwira ntchito mu mpweya wa okosijeni nthawi ya 1700 In. M'mlengalenga wa oxidizing, zotchinga zimapangidwa pamwamba pa galasi lolimba kwambiri la silika (SiO2) lotenthedwa pakatenthedwe kapewedwe kake molybdenum disilicate.When kutentha kwa chinthu Kutentha ndi apamwamba kuposa 1700 ℃, SiO2 filimu zoteteza aumbike, amene unakhuthala pa 1710 ℃ ndipo anasakaniza ndi
SiO2 m'madontho osungunuka. Chifukwa chakuwonjezera kwake pamwamba, amataya mphamvu yake yotetezera.Pansi pa zochita za okosijeni, chinthucho chikamagwiritsidwa ntchito mosalekeza, chimapangidwanso ngati filimu yoteteza. Tiyenera kudziwa kuti chifukwa cha makutidwe ndi okosijeni amphamvu pa Kutentha kochepa, chinthucho sichingagwiritsidwe ntchito kwa nthawi yayitali pa 400-700 M. Molybdenum disilicide imagwiritsidwa ntchito m'malo opangira zida zotetezera kutentha kwambiri zamagetsi, zinthu zotenthetsera zamagetsi, makanema ophatikizika a elekitirodi, zida zomangira, kulimbitsa zida zophatikizira, valani zida zosagwira, zida zolumikizira za zomangamanga, ndi zina zambiri. Amagawidwa m'makampani otsatirawa:

1) Makampani opanga zamagetsi: magetsi otenthetsera magetsi, kutentha kwakukulu kosinthira ma atomiki, zotenthetsera gasi, ma thermocouples otentha kwambiri ndi machubu awo oteteza, mbiya yazitsulo zosungunuka (zomwe zimagwiritsidwa ntchito kusungunuka kwa sodium, lithiamu, lead, bismuth, malata ndi zitsulo zina. ).

2) Makampani a Microelectronics: MoSi2 ndi ma silicides ena achitsulo otsutsa Ti5Si3, WSi2 ndi TaSi2 ndiofunikira kwambiri pa GATE ndi kulumikizana kwamafilimu opyapyala a LSI.

3) Makampani opanga zinthu zakuthambo: Amasanthula kwambiri ndikugwiritsa ntchito ngati kutentha kwambiri kwa antioxidant. Makamaka ngati zida zama injini, monga masamba, zotumphukira, chowotchera, mphuno ndi kusindikiza zida zakuthupi. Molybdenum disilicide yakhala malo otchuka kwambiri posaka kafukufuku Zida zophatikizika zamagetsi monga zida zomangira zomwe zimagwiritsidwa ntchito pazinthu zotentha kwambiri, zoyatsira gasi, ma bubu, zosefera zotentha kwambiri ndi mapulagi oyatsira ndege ndi ma turbines agalimoto yamagalimoto Chopinga chachikulu pantchito iyi ndikutentha kwake kwakukulu kutentha kwapakati komanso mphamvu zochepa kutentha kwambiri Chifukwa chake, kutentha kotsika pang'ono komanso kutentha kwakukulu kolimbitsa molybdenum disilicate ndi matekinoloje ofunikira pakugwiritsa ntchito kwake monga zida zomangira.Zotsatira zake zikuwonetsa kuti kulumikiza ndi kuphatikiza ndi njira zothandiza zokulitsira kulimba komanso kutentha kwamphamvu kwa molybdenum disilicate kutentha kwapakati. The zigawo zikuluzikulu ntchito moly Kuphatikiza kwa bdenum kuphatikizira ndi ma silicide ochepa omwe ali ndi cholumikizira chofananira kapena chofananira ndi molybdenum disilicide, monga WSi2, NbSi2, CoSi2, Mo5Si3 ndi Ti5Si3, pomwe WSi2 ndiye abwino kwambiri. Zatsimikizika kuti mankhwala ophera molybdenum ali ndi kukhazikika kwamankhwala komanso kulimbitsa thupi ndi pafupifupi onse othandizira a ceramic (monga SiC, TiC, ZrO2, Al2O3, TiB2, etc.).
Chifukwa chake, njira yothandiza kwambiri yosinthira makina a molybdenum disilicate ndikukonzekera molybdenum disilicate composite.


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