Zirconium Boride Hmoov, ZrB2

Nyob zoo, tuaj sab laj nrog peb cov khoom!

Zirconium Boride Hmoov, ZrB2

tuaj yeem siv ua aerospace siab kub cov ntaub ntawv, hnav-resistantsmooth cov khoom ruaj khov, cov cuab yeej txiav, thermocouple thermocouple tiv thaiv thiab electrolytic melting tebchaw ntawm cov khoom siv electrode. Tshwj xeeb yog tsim nyog rau siv raws li ib qho saum npoo rau dov kabmob pob


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cov mis mos molecular  Zrb2
Tus Lej  12045-64-6
Nta  zog grey dub
Taw tes kis  3040'C
Yog ceev  6. g / cm3.
Kev Siv  tuaj yeem siv ua aerospace siab kub cov ntaub ntawv, hnav-resistantsmooth cov khoom ruaj khov, cov cuab yeej txiav, thermocouple thermocouple tiv thaiv thiab electrolytic melting tebchaw ntawm cov khoom siv electrode. Tshwj xeeb yog tsim nyog rau siv raws li ib qho saum npoo rau dov kabmob pob

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Zirconium Diboride
CAS Tsis Yog: 12045-64-6
EINECS No .: 234-963-5
Cov mis mos cov qauv: ZrB2
Molecular phaus 112.84
Qhov ntom ceev 4.52g / cm3
Melting point (3040 ℃)

Nws muaj lub hardness siab thiab yog ib qho quasi hlau txuas nrog hexagonal qauv
Thov

1. Kev Huab Cua Kev Lag Luam
ZrB2 series cov khoom siv tsim nyog rau daim ntawv thov ntawm ultra-high kub xoom ablation cov ntaub ntawv rau lub dav hlau qhov chaw dav dav thiab cov foob pob hluav taws plooj vim lawv lub siab yaj, siab hardness, zoo conductivity thiab zoo neutron tswj muaj peev xwm. Tshwj xeeb nrog txoj kev loj hlob sai ntawm cov foob pob ua ntxaij thiab cov thev naus laus zis, qhov kev thov kom muaj qhov kub thiab tsawg cov qauv ntawm zirconium borate raws ceramics yog qhov ceev dua. Nrog kev zuj zus ntawm kev tshawb nrhiav thiab kev ua haujlwm thiab kev txhim kho txuas ntxiv ntawm cov thev naus laus zis ntau lawm, nws paub tseeb tias kev tshawb nrhiav, kev tsim khoom thiab kev siv ntawm ZrB2 series cov kab ke yuav dhia mus tom ntej ntawm kev hloov tshiab.

Zirconium diboride (ZrB2) muaj lub siab melting, siab modulus, siab hardness, siab thermal conductivity thiab hluav taws xob conductivity, thiab zoo thermal poob siab vim nws cov tshuaj muaj zog. Nws tau dhau los ua cov neeg muaj peev xwm tshaj plaws cov khoom siv rau ultra-high kub ceramics. ZrB2 ceramic khoom tau dav siv raws li cov txheej txheem kub thiab cov khoom siv coj los ua haujlwm, xws li cov tshuab raj cua thiab
MHD lub zog hluav taws xob hluav taws xob hauv kev lag luam aviation. Tsis tas li ntawd, piv nrog ntau cov ntaub ntawv ceramic, nws muaj cov hluav taws xob zoo dua qub, thiab tuaj yeem tsim cov khoom seem nrog cov qauv duab los ntawm cov hlau txiav tshuab. Txawm li cas los xij, ZrB2 muaj qhov chaw siab melting, nyuaj thaum sintering thiab kuj tsis tshua muaj zog thiab tawv, uas txwv nws daim ntawv thov hauv ib puag ncig ua haujlwm hnyav. Vim li no, cov kws tshawb fawb hauv tsev thiab txawv teb chaws tau tshawb fawb ntau ntawm ZrB2 cov khoom sib xyaw nrog lwm cov khoom siv los ntawm kev siv ntau cov txheej txheem sintering, kom thiaj li txhim kho cov khoom ntiag tug ntawm cov ntaub ntawv. Hauv daim ntawv no, ZrB2 cov kev sib xyaw thiab lawv cov densification tau tshuaj xyuas.
2 refractory

ZrB2 ceramic yog qhov zoo tshaj plaws, cov khoom siv refractory tshwj xeeb, tuaj yeem siv cov khoom cua kub siab tiv thaiv lub tes tsho, ua haujlwm pwm, nws yog xim hlau uas ua rau ntsia tau yooj yim, thiab lwm yam vim tias nws cov airtightness thiab conductivity, nws yog qhov tsim nyog los ua haujlwm nrog txhuas oxide sab hauv lub raj kom nqa tau. tawm cov kev ntsuas kub kom zoo thaum ua haujlwm raws li cov thermocouple. Cov thermowell ua los ntawm cov khoom siv no tuaj yeem siv txuas ntxiv rau lub sijhawm ntev ntev hauv hlau tsis xeb thiab tooj dag. ZrB2 ceramics kuj tseem siv tau ua antioxidants hauv refractories. LV Chunyan li al. qhia tias los ntawm ntxiv
ZrB2 rau MgO-C refractory lossis siv ZrB2 ncaj qha los ua kev sib xyaw lossis hmoov zoo. Nws ua rau refractory cib thiab castable thiab qhia tau zoo heev oxidation tsis kam thiab hluav taws ua hauj kev kawm. Lub zog tiv taus oxidation tuaj yeem ua raws li hauv qab no: B2O3 tsim los ntawm ZrB2 oxidation ntawm nruab nrab kub tsis xws li mgo-b2o3 molten theem hauv MgO-C, yog li tiv thaiv lub cib.
3 cov khoom siv electrode
Tsawg kev ua haujlwm, hluav taws xob hloov hluav taws xob yog hluav taws xob hloov. haum rau cov khoom sib cuag thiab cov khoom siv electrode vim tias nws lub zog qis tsis kam thiab cov cuab yeej hluav taws xob sib xyaw. Nws tuaj yeem siv hauv cov hluav taws xob hauv hluav taws xob thiab qhov kub thiab txias cua sov lub cev ntawm cov hlau thermocouple. Xyoo 1994, Feng Dagan tsim cov khoom siv thermoelectric ob peb cov khoom siv ntawm ZrB2 thiab graphite, uas tuaj yeem ua haujlwm hauv oxidation cua ntawm 1200 ~ 1600 ℃
Thaum qhov ntsuas kub yog 1 600 ℃, nws muaj peev xwm ncav cuag li 70 MV thiab lub ntsuas kub ntawm lub zog thermoelectric yog li 55 μ V / ℃. Cov txiaj ntsig pom tau hais tias lub thermoelectric lub peev xwm yog ib tus nqi muaj nuj nqi nrog cov kab zoo. Qhov rov qab ua tiav ntawm qhov ntsuas sov tau zoo yog 1% ~ 1.5% ntawm qhov ntsuas kub tom qab ntau qhov kev sim hauv qhov chaw oxidation. Qhov siab tshaj plaws ntawm kev hloov pauv cov thermoelectric muaj peev xwm yog 0.5% ~ 1% ntawm qhov ntsuas kub hauv lub sijhawm luv tshaj rau ntau tshaj 3 h. Nws tuaj yeem siv rau kev qhia txuas ntxiv nyob rau qee lub sijhawm tshwj xeeb uas qhov ntsuas hlau tsis sov thiab hluav taws xob tus pas ntsuas kub tsis haum. Raws li cov khoom siv zoo thermocouple.

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