Tungsten Boride Hmoov, WB2

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Tungsten Boride Hmoov, WB2

BW2 muaj qhov chaw siab melting, siab hardness, siab conductivity thiab siab corrosion kuj thiab oxidation tsis kam rau ntau hom xov xwm. Cov khoom zoo no ua rau WB cov khoom siv dav siv nyob rau hauv qhov chaw ib puag ncig hnyav .Txoj txheej thiab semiconductor zaj duab xis, qhov kub siab corrosion electrode cov ntaub ntawv, casting pwm, crucible thiab li ntawd.


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Cov mis mos molecular WB2
Tus Lej 12228-69-2
Nta  hmoov dub thiab txho
Yog ceev  10.77 g / cm3
Melting taw tes 2900
Thov vim nws lub siab hardness nws tuaj yeem raug siv los ua cov khoom kub thiab ua ywj

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Tungsten diboride
Nyiaj dawb octagonal siv lead ua.
Tus txheeb ze ceev 10.77, melting taw tes txog 2900 ℃.
Insoluble hauv dej, soluble hauv aqua regia.
Boron thiab tungsten hmoov tau muab sib xyaw ua kom sov siab.

Tungsten boride muaj qhov chaw siab melting, siab hardness, tshuaj lom neeg ruaj khov thiab lwm yam khoom muaj zog. Nws tsis yog tsuas yog cov khoom siv superhard tshiab xwb, tab sis kuj tseem muaj qhov siab tawv. Nws yog cov khoom siv mos txwv tseem ceeb hauv kev ua tub rog. Tungsten boride muaj kev ua tiav ntau ntu, thiab cov qauv ntawm cov theem sib txawv kuj hloov tau. Rau ntau dua 50 xyoo, tungsten qhov kev them tshaj plaws tau xav tias yog WB4, uas muaj daim phiaj peb-kawg ntawm kab ntawm boron atoms. Lub thermodynamic kev ruaj ntseg thiab lub zog ntawm cov yam ntxwv ua tau cov theem ntawm cov tungsten carbide system tau muab kev kawm paub tseeb los ntawm kev sib txuas nrog thawj txoj ntsiab cai suav nrog lub thermodynamic stability:

Qhov siab tshaj plaws rau kev txiav txim siab tungsten yuav tsum yog WB3 li ntawm 2-d planar boron atoms, tsis yog WB4 muaj li ntawm 3-D peb-dimension boron atom grids.
Nws tau pom tias cov shear modulus nce nrog qhov txo qis ntawm nws txoj kev tsim lub zog hauv cov kab ke ntawm tungsten, qhia tawm tias cov khoom siv lub cev muaj feem cuam tshuam nrog lawv cov thermodynamic ruaj ntseg.
Vim nws qhov tshwj xeeb cov tshuab, hluav taws xob thiab cov khoom sib nqus, tungsten boride tau muaj kev txaus siab hauv kev tshawb fawb yooj yim thiab siv cov khoom siv science.
Vim tias qhov tsis tshua muaj qhov sib txawv ntawm qhov sib txawv ntawm WB2, tam sim no, cov hluavtaws sib xyaw ua ke ntawm tungsten diboride feem ntau ua tiav los ntawm sintering nyob rau hauv qhov kub thiab siab. Ntawm qhov tod tes, vim hais tias B evaporates ntawm qhov kub. Yog li, kev npaj ncaj qha ntawm WB2 thaiv cov khoom siv nrog tungsten hmoov thiab boron hmoov yog qhov nyuaj los tswj cov kab mob boron, thiab cov qiv nyiaj tsawg (xws li W2B) yuav tsim nyob rau hauv cov txheej txheem sintering, yog li ntawd tuab cov ntaub ntawv nrog WB2 ua lub ntsiab theem tsis tau tag nrho.
Thov teb:
Hnav - tiv taus txheej thiab semiconductor zaj duab xis rau hnav - qhov chaw tiv taus.

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