Scandium oxide (Sc₂O₃), cov tshuaj lom neeg muaj xws li divalent oxygen anions thiab trivalent scandium cations, nthuav tawm raws li ib tug starkly dawb, finely faib hmoov nyob rau hauv ambient tej yam kev mob, nws seemingly unassuming tsos belying ib tug nplua nuj intriguing physicochemical cwj pwm uas underpin nws nce lub luag hauj lwm tseem ceeb nyob rau hauv ib tug ntau yam array ntawm advanced technologies. Cov yam ntxwv tseem ceeb ntawm cov sesquioxide no, suav nrog nws cov yam ntxwv ntawm lub cev thiab tshuaj lom neeg reactivity, tsis yog tsuas yog kev kawm xav paub tab sis yog qhov kev txiav txim siab ntawm nws cov khoom siv thoob plaws qhov sib txawv, xws li kev ua haujlwm siab teeb pom kev zoo rau kev tsim cov hlau alloys siab heev nrog cov yam ntxwv ua tau zoo.
Breif kev taw qhia
| Khoom | Scandium oxide, Scandium (III) oxide |
| Cas | 12 060-08-1 |
| MF | Sc2O 3 |
| Purity Sc2O3/REO | 99% ~ 99.999% |
| Molecular Luj | 137.91 Nws |
| Qhov ntom | 3.86 g / cm3 |
| Melting point | 2485 ° C |
| Qhov tshwm sim | Dawb hmoov |
| Solubility | Insoluble nyob rau hauv dej, me ntsis soluble nyob rau hauv muaj zog mineral acids |
| Kev ruaj ntseg | Me ntsis hygroscopic |
| Multilingual | Scandium Oxid, Oxyde De Scandium, Oxido del Scandium |
| Melting Point | 2403 ° C |
| Exact Mass | 137,897 g / mol |
| Monoisotopic Mass | 137.896564 Ib |
| Hom | Epoch |
Lub cev profile ntawm scandium oxide yog cim los ntawm nws qhov tseem ceeb thermal robustness, nthuav tawm qhov tshwj xeeb tshaj plaws melting point uas feem ntau ntog nyob rau hauv thaj tsam ntawm 2400 txog 2485 degrees Celsius, ua pov thawj rau cov muaj zog interatomic rog nyob rau hauv nws crystalline lattice. Nws cov ntsiab lus kub kub yog qhov siab dua, ntxiv rau nws cov xwm txheej refractory thiab nws lub peev xwm los tiv thaiv huab cua kub ib puag ncig yam tsis muaj kev hloov pauv hloov pauv. Nrog rau kev sib nqus tshwj xeeb ntawm 3.86 grams ib cubic centimeter, nws muaj feem cuam tshuam txog qhov uas cov khoom tsim hluav taws xob yog qhov tsim txiaj ntsig. Tsis tas li ntawd, scandium oxide qhia tau tias muaj kev tsis sib haum xeeb hauv cov xov xwm aqueous, tus yam ntxwv tshwm sim los ntawm kev ruaj khov ionic bonding hauv nws cov qauv, txawm hais tias nws nkag mus rau hauv cov ntsiab lus ntawm cov ntxhia hauv cov kua qaub thaum cua sov, tsim cov khoom siv scandium ntsev, tshuaj lom neeg coj los siv rau hauv ntau yam txheej txheem hluavtaws. Tshuaj,scandium oxide hmoovnthuav tawm amphoteric tendencies, txawm hais tias nws cov hauv paus ntsiab lus yog ntau tshaj li nws cov acidity, cia nws hnov mob nrog acidic hom los ua ntsev. Interestingly, nws tseem tuaj yeem nqus cov pa roj carbon dioxide hauv huab cua, tshwj xeeb tshaj yog nyob rau hauv cov dej noo, ua rau tsim cov carbonates los yog hydroxycarbonates, ib qho tshwm sim uas yuav tsum tau ceev faj khaws cia kom huv si.
Tshaj li nws cov yam ntxwv pom tau, scandium oxide nthuav tawm qhov zoo nkauj ntawm cov khoom siv kho qhov muag thiab hluav taws xob uas tau nce ntxiv hauv cov thev naus laus zis siab heev. Nws qhov refractive index, kuj siab ntawm kwv yees li 1.85 mus rau 1.96 nyob ntawm lub wavelength thiab cov khoom ntom ntom, ua rau nws muaj txiaj ntsig hauv kev tsim cov txheej txheem kho qhov muag thiab lo ntsiab muag, txhim kho kev ua haujlwm ntawm lub teeb kis tau tus mob thiab kev tswj xyuas. Kev nthuav tawm tseem ceeb ntawm kev xa tawm thoob plaws qhov pom thiab ze-infrared feem ntawm electromagnetic spectrum, nws ua haujlwm tseem ceeb hauv cov qhov rais kho qhov muag thiab ua pob tshab substrate rau nyias zaj duab xis hauv cov khoom siv optoelectronic. Ntxiv mus, thaum lub tswv yim doped nrog lub ntiaj teb tsis tshua muaj ions, scandium oxide qhia photoluminescence, emitting lub teeb ntawm lub wavelengths tshwj xeeb thaum excitation, ib qho cuab yeej tseem ceeb rau nws siv nyob rau hauv lub zog-npaum teeb pom kev zoo-lub xeev teeb pom kev zoo thiab advanced zaub technologies. Nyob rau hauv nws lub xeev intrinsic, scandium oxide ua hauj lwm raws li ib tug hluav taws xob insulator, tus yam ntxwv los ntawm siab resistivity, ib tug tseem ceeb heev attribute rau nws daim ntawv thov raws li ib tug dielectric khoom nyob rau hauv cov khoom siv hluav taws xob, tiv thaiv tsis xav tau tam sim no to. Nws qhov siab dielectric tsis tu ncua kuj tseem ua rau nws tsim nyog siv rau hauv cov khoom siv hluav taws xob, ua kom lub zog txuag hluav taws xob hauv hluav taws xob.
Txhawm rau nkag siab txog tus cwj pwm macroscopic ntawm scandium oxide, kev nkag siab ntawm nws lub hauv paus atomic architecture yog qhov tseem ceeb. Nws crystallizes nyob rau hauv lub cubic Bixbyite qauv, ib tug ntau motif ntawm lub ntiaj teb tsis tshua muaj sesquioxides, yam ntxwv los ntawm lub ntsej muag-centered cubic kev npaj ntawm oxide anions nrog scandium cations nyob rau tej qhov chaw octahedral, txawm hais tias nrog inherent anionic vacancy. Cov yam ntxwv ntawm cov qauv no hais txog qhov sib txawv ntawm qhov sib txawv thiab kev sib txuas ntawm cov ces kaum, thaum kawg cuam tshuam cov khoom siv tag nrho kev ruaj ntseg thiab cov khoom. Qhov kev txiav txim siab thiab muaj zog ionic bonding nyob rau hauv qhov siv lead ua lattice no ua rau muaj txiaj ntsig zoo rau cov khoom siv siab melting point thiab tshuaj inertness nyob rau hauv ntau yam mob.
venturing tshaj nws cov yam ntxwv tseem ceeb, scandium oxide nthuav tawm ntau yam ntawm cov khoom siab tshaj thiab tawm tshiab uas tau txais kev txaus siab tseem ceeb hauv kev tshawb fawb txiav. Nws nto qhia catalytic kev ua si rau qee yam tshuaj hloov pauv, thiab nws lub peev xwm los adsorb ntau yam molecules tab tom tshawb nrhiav hauv sensor technologies. Thaum lub tshuab hluav taws xob hluav taws xob, nws muaj qhov ntsuas thermal conductivity, ua kom muaj cua sov dissipation, qhov tseem ceeb hauv kev siv hluav taws xob hluav taws xob siab. Nws kuj tsis tshua muaj coefficient ntawm thermal expansion ua kom muaj kev ruaj ntseg nyob rau hauv ntau qhov kub thiab txias, ib qho kev xav zoo hauv precision engineering. Tsis tas li ntawd, nws qhov tseem ceeb hardness thiab nruab nrab tawg toughness pab txhawb rau nws cov durability nyob rau hauv demanding mechanical ib puag ncig.
Thaum kawg, qhov tshwj xeeb confluence ntawm scandium oxide lub cev, tshuaj, kho qhov muag, hluav taws xob, thiab cov khoom siv tshuab txiav txim siab nws cov kev siv ntau yam thiab nthuav dav. Nws thermal stability thiab luminescent zog underpin nws siv nyob rau hauv high-siv teeb pom kev zoo. Nws lub peev xwm los txhim kho lub zog thiab weldability ntawm aluminium alloys, los ntawm kev ua kom zoo ntawm cov nplej, yog qhov tseem ceeb hauv aerospace thiab automotive engineering. Nws cov dielectric thiab insulating zog yog exploited nyob rau hauv hluav taws xob ceramics thiab capacitors. Nws refractive index thiab pob tshab yog leveraged nyob rau hauv optical txheej. Kev ua haujlwm catalytic ntawm nws qhov chaw yog tshawb hauv cov tshuaj synthesis, thiab nws cov peev xwm adsorption tau siv hauv cov cuab yeej sensor. Kev txiav doping ntawm scandium oxide nrog lub ntiaj teb tsis tshua muaj cov ntsiab lus ua rau kev tsim cov phosphor tshwj xeeb rau cov teeb pom kev zoo thiab cov ntawv thov. Raws li kev tshawb fawb txuas ntxiv mus daws qhov tsis sib haum xeeb ntawm nws cov khoom thiab tshawb nrhiav cov txheej txheem kev sib txuas tshiab, cov ntawv thov ntawm scandium oxide tau npaj rau kev nthuav dav ntxiv, ua kom nws lub luag haujlwm ua cov khoom tseem ceeb hauv kev txhim kho thev naus laus zis yav tom ntej.
Post lub sij hawm: May-08-2025