Silicon Carbide Mirrors Rau Space-based Sensors

Silicon carbide tsom iav yog qee yam ntawm cov khoom siv kho qhov muag zoo tshaj plaws, muaj peev xwm tiv taus cov xwm txheej uas yuav ua rau cov iav feem ntau puas. Ua los ntawm cov khoom siv silicon ceramic, SiC iav muaj cov khoom sib xyaw ua ke uas muaj qhov tshwj xeeb tiv thaiv tshav kub, abrasives, tshuaj lom neeg, thiab kev ntxhov siab ib puag ncig. Nrog SiC thev naus laus zis, kev kho qhov muag pom tau zoo heev tuaj yeem qhib txoj hauv kev rau kev tsim kho tshiab hauv kev lag luam xws li lub zog lasers, kev ua cov khoom siv hluav taws xob, kev tsim hluav taws xob aerospace, thiab lwm qhov chaw tsuas yog los ntawm kev xav ntawm cov kws tshawb fawb thiab cov kws tsim qauv.

 

Ntawm peb lub tuam txhab, peb tsim cov iav silicon carbide uas tiv thaiv cov kev txwv ntawm cov pa optics. Peb siv cov thev naus laus zis thev naus laus zis SiC ceramic tsim los tsim cov iav uas tiv taus cua sov, puas, thiab ib puag ncig kev ntxhov siab uas tsis suav nrog lwm cov ntaub ntawv.

 

Peb cov iav SiC muab kev tuav pov hwm tsis sib luag yam tsis muaj kev cuam tshuam lossis kev puas tsuaj rau lub tshuab laser siab. Nrog rau thermal conductivity plaub npaug ntawm tooj liab thiab qhov ntev stability ntawm qhov kub siab tshaj 1000 degree, peb laser-qib SiC iav tuaj yeem dissipate kub hnyav loads uas yuav tawg iav zoo tib yam. Peb cov iav SiC ruaj khov kho qhov muag pom tseeb rau xyoo tsis muaj kev xeb lossis khawb hauv qhov chaw ua haujlwm hnyav uas muaj cov tshuaj abrasive lossis cov khoom siv. Tsis muaj kev cuam tshuam los ntawm cov kua qaub, alkalis, lossis cov kuab tshuaj organic, peb cov iav SiC ua haujlwm dawb hauv cov huab cua uas ua kom puas hlau lossis iav optics sai sai.

 

Koj qhov xav tau daim iav xav tau tshaj plaws yuav ua tau raws li lawv qhov sib tw hauv peb daim iav SiC. Tsis lees txais cov kev txwv ntxiv los ntawm cov khoom tsis yooj yim, tsis muaj txiaj ntsig - unleash innovation tsuas yog ua tau los ntawm iav yam tsis muaj kev txwv. Peb npaj txhij los pab koj hla dhau kev thaiv thiab paub txog qhov kev cia siab yav dhau los xav tias tsis tuaj yeem ua tiav. Tiv tauj peb hnub no kom pom tias peb tuaj yeem hloov koj lub tswv yim mus rau qhov tseeb li cas.

 

Nta

- Siab hardness

- Siab thermal stability

- Precision nto

- Dimensional stability

- Lub teeb yuag

- Cov coatings ruaj khov

- Kev kho kom haum

 

Tsis muaj

Khoom npe	Silicon Carbide Daim iav
Hardness	Ntau dua lossis sib npaug rau 9 (Mohs nplai)
Thermal stability	Dimensionally stable to >1000 degree
Nto roughness	Tsawg dua lossis sib npaug li 5 nm RMS
Nto flatness	λ/10 PV (λ/20 RMS)
Dimensional stability	Tsawg dua lossis sib npaug li 25 ppm / degree nthuav dav
Ua haujlwm temp. ntau	-50℃ to >1000 degree
Kev kho kom haum	Kev pabcuam engineering muaj

 

Spectrum Transmission Curve

 

Daim ntawv thov

SiC tsom iav muab cov txiaj ntsig tshwj xeeb rau cov ntawv thov uas muaj kev siv siab, qib hluav taws xob, qhov tseeb, lossis qhov chaw huab cua cuam tshuam. Lawv cov khoom siv tshwj xeeb ua rau lawv muaj txiaj ntsig hauv thaj chaw xws li astronomy thiab lasers mus rau qhov chaw tshawb nrhiav thiab kev tshawb fawb particle physics. Qee cov ntawv thov tseem ceeb suav nrog:

- Cov tsom iav hauv qhov chaw

- Lub zog loj laser optics

- Astronomical instrumentation

- Kev siv UV

- Precision optics

- Muaj lasers

- Cov ntawv thov kho mob

- Particle beam optics

 

Cov khoom siv dab tsi yog siv rau cov iav tsom iav?

Ntau cov ntaub ntawv feem ntau yog siv rau cov iav tsom iav:

• Iav - iav yog ib daim iav nrov substrate vim nws cov pob tshab optical, hardness, thiab du nto zoo. Hom iav rau iav muaj xws li borosilicate iav zoo li BK7, fused silica, thiab tshwj xeeb iav zoo li Zerodur, uas muaj meager thermal expansion. Cov iav tuaj yeem tiv taus lub zog kho qhov muag siab thiab ua rau cov iav tiaj tus heev. Txawm li cas los xij, iav yog qhov hnyav, tsis muaj zog, thiab nyuaj rau polish thiab mount dua li lwm cov ntaub ntawv iav.

 

• Aluminium - Aluminium alloys yog lub teeb yuag, pheej yig, thiab polished sai sai rau kev kho qhov muag. Cov iav txhuas, zoo li qhov chaw tsom iav hauv qhov chaw, feem ntau siv hauv cov ntawv pom kev pom qhov hnyav yog qhov kev txhawj xeeb. Txawm li cas los xij, aluminium tarnishes dhau sijhawm thiab muaj qhov kev puas tsuaj qis dua, qhov siab tshaj plaws ua haujlwm kub, thiab thermal conductivity dua lwm yam hlau. Aluminium oxide los yog txhim kho aluminium coatings tuaj yeem pab daws qee qhov teeb meem no.

 

• Copper - Electroformed tooj liab tsom iav yog lub teeb yuag, ruaj, thiab thermally ruaj khov. Tooj liab muaj cov thermal conductivity siab, yog li nws tiv taus overheating, txawm nyob rau hauv lub siab optical powers. Cov iav tooj liab feem ntau yog siv rau infrared wavelengths qhov twg hluav taws xob nqus yog ib qho kev txhawj xeeb. Txawm li cas los xij, tooj liab tarnishes yooj yim thiab nyuaj rau polish rau qhov kho qhov muag tshaj li qee cov hlau. Copper oxide los yog txhim kho tooj liab coatings pab tiv thaiv tarnishes thiab txhim kho nto zoo.

 

• Silicon - Ib leeg-crystal silicon muaj cov khoom siv kho qhov muag zoo, hardness, thiab qhov ruaj khov ntawm qhov kub thiab txias. Silicon iav, zoo li silicon carbide tsom iav, muaj txiaj ntsig zoo rau lub zog siab CO2 laser wavelengths uas feem ntau cov hlau nqus tau zoo heev. Txawm li cas los xij, silicon yog qhov nyuaj rau polish thiab lub tsho tiv no thiab kim heev. Fused silica yog ib daim ntawv amorphous ntawm silicon dioxide iav uas qhia qee yam khoom muaj txiaj ntsig ntawm silicon ntawm tus nqi qis.

 

• Nyiaj - Nyias nyiaj txheej yog dav siv los coated tooj liab, txhuas, thiab iav tsom iav los txhim kho reflectance nyob rau hauv lub pom thiab ze-infrared spectrum. Silver muaj qhov siab tshaj plaws ntawm txhua yam hlau rau pom lub teeb. Txawm li cas los xij, cov iav nyiaj ntau corrode thiab tarnish sai heev rau feem ntau cov ntawv thov thiab yog mos heev. Cov xim nyiaj feem ntau yog coated nrog quartz lossis magnesium fluoride rau kev tiv thaiv.

 

• Kub - Kub kuj muaj siab reflectance nyob rau hauv lub pom thiab infrared, thiab nws tsis corrode los yog tarnish zoo li nyiaj. Txawm li cas los xij, kub yog kim thiab mos. Zoo li cov nyiaj, nws feem ntau siv rau hauv cov txheej nyias nyias rau saum daim iav uas muaj zog dua li iav, quartz, npib tsib xee alloys, thiab electroless nickel. Cov iav kub thiab txheej txheej muaj nyob rau hauv precision optics rau wavelengths mus txog ~ 2 microns.

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