Tube furnaces yog haum rau txhua qhov siab - txheej txheem kub uas yuav tsum tau tswj kom meej ntawm cov qauv huab cua.
Lub peev xwm tseem ceeb no ua rau lawv cov cuab yeej tseem ceeb rau kev sib txuas cov ntaub ntawv tshiab (xws li graphene), kev kho cua sov (xws li annealing thiab sintering), thiab tso cov yeeb yaj kiab nyias rau cov khoom siv hluav taws xob thiab txheej txheej ntawm cov tshuaj vapor deposition (CVD).
Qhov zoo ntawm cov tube furnaces ntev tshaj li lawv muaj peev xwm ncav cuag qhov kub thiab txias.
Lawv qhov muaj nqis tiag yog nyob rau hauv lawv qhov kev sib khi-tube tsim, uas tso cai rau cov kws tshawb fawb los tsim, tswj, thiab hloov kho qhov chaw tswj cov pa roj ntau nyob ib puag ncig tus qauv-xws li los ntawm lub tshuab nqus tsev ntshiab mus rau qhov chaw muaj tshuaj lom neeg zoo heev- thaum ua.
Dab tsi yog qhov tseem ceeb ntawm kev siv tube rauv hauv cov ntaub ntawv tshawb fawb thiab chemistry? Xauv precision siab -kub ua tshuab.
Cov ntsiab lus tseem ceeb: Vim li cas lub raj tsis siv lub thawv?
Qhov tshwj xeeb geometry ntawm lub raj cua sov yog qhov tseem ceeb rau nws cov kev siv tseem ceeb. Tsis zoo li lub thawv rauv taws los yog qhov cub yooj yim, lub tshuab raj cua sov cais cov qauv hauv ib puag ncig kaw, ua kom muaj ob txoj haujlwm tseem ceeb ib txhij:
Ua tau zoo ib yam kub kub
Cov khoom cua kub nyob ib puag ncig lub raj ceramic lossis quartz, tsim kom muaj qhov tsis tu ncua - qhov kub thiab txias.
Qhov no ua kom muaj kev kho cua sov zoo, vim tias kev tswj xyuas qhov kub thiab txias los yog ua raws li cov cua sov ua ntej thiab cua txias yog qhov tseem ceeb rau cov khoom siv kawg.
Tswj cov huab cua
Ob qhov kawg ntawm lub raj tuaj yeem raug kaw nrog flanges txuas nrog cov kab roj thiab lub tshuab nqus tsev twj. Qhov no ua rau cov kws tshawb nrhiav kev tswj hwm tag nrho ntawm cov tshuaj ib puag ncig, ua kom muaj kev ua haujlwm tsis yooj yim hauv huab cua qhib, xws li ua cov pa oxygen- cov ntaub ntawv rhiab heev lossis qhia cov pa roj tshwj xeeb.
Kev siv tseem ceeb hauv kev hloov khoom siv
Los ntawm kev tswj cov cua sov thiab cua sov, lub tshuab hluav taws xob ua haujlwm ua ntau yam platforms rau kev tsim thiab hloov cov ntaub ntawv ntawm ib qho tseem ceeb.
Synthesis ntawm cov khoom siv siab heev
Tube rauvyog cov cuab yeej tseem ceeb rau kev npaj cov ntaub ntawv nrog cov khoom tshiab.
Qhov no suav nrog kev loj hlob ib leeg muaju rau cov khoom siv hluav taws xob, npaj cov khoom sib xyaw ua ke, thiab ua ke cov khoom siv nano xws li carbon nanotubes thiab graphene.
Cov txheej txheem synthesis no feem ntau xav tau cov pa roj carbon monoxide tshwj xeeb thiab yuav tsum tau ua nyob rau hauv ib puag ncig tsis muaj oxygen.
Thermal decomposition thiab pyrolysis
Pyrolysis yog hais txog cov txheej txheem ntawm thermally decomposing ib yam khoom nyob rau hauv ib qho inert (non{0}}reactive) cua.
Nyob rau hauv ib lub raj rauv, cov qauv tuaj yeem ua kom sov nyob rau hauv cov dej ntws ntawm nitrogen los yog argon, ua rau lawv decompose rau hauv cov khoom yooj yim yam tsis muaj combustion. Cov txheej txheem no yog siv dav hauv kev tshawb fawb biomass thiab kev npaj cov khoom siv tshwj xeeb carbon.
Kev kho cua sov: sintering, annealing, thiab quenching
Cov txheej txheem no siv lub zog thermal los hloov cov khoom siv microstructure es tsis yog nws cov tshuaj muaj pes tsawg leeg.
Sintering yog txheej txheem ntawm compacting hmoov rau hauv ib qho khoom loj; Nws yog ib qho tseem ceeb hauv ceramics thiab hmoov metallurgy.
Annealing thiab quenching tuaj yeem hloov kho cov khoom ntawm cov hlau thiab lwm yam khoom, ua rau lawv muaj zog dua los yog tsawg dua. Cov huab cua tswj tau tuaj yeem tiv thaiv tsis tau oxidation ntawm qhov kub thiab txias.