Kev tshuaj xyuas thiab kev xaiv cov khoom siv rau Graphite Crucibles

Graphite cruciblesyog dav siv nyob rau hauv ntau yam kev siv, thiab nws yog ib qho tseem ceeb rau ua tib zoo soj ntsuam thiab ua tib zoo xaiv cov khoom tsim nyog. Nov yog qee cov lus qhia rau kev tshuaj xyuas thiab xaivgraphite crucibles:

Kev soj ntsuam ua ntej siv: Ua ntej siv lubgraphite crucible, xyuas cov kab nrib pleb thiab kev puas tsuaj. Kom tsis txhob muaj cov kab nrib pleb pom, nws yog ib qho tsim nyog yuav tsum tau ua kom sov lub crucible mus rau qhov kub siab tshaj 600 ° C kom paub meej kom qhuav.

Kev npaj ib puag ncig: xyuas kom tsis muaj cov dej ntim hauv lub qhov cub lossis qhov qhov chaw uas lub qhov cub yuav muab tso rau. Tsis tas li ntawd, khaws cov khoom tsis sib xws deb ntawm thaj tsam ntawm graphite crucible.

Kev tuav cov khoom siv: Ceev faj thaum tuav cov khoom siv rau hauv qhov cub. Xyuas kom meej tias cov ntaub ntawv tsis tawg thiab tau preheated thiab kom qhuav. Thaum ntxiv cov ntaub ntawv rau graphite crucible, ua nws maj mam thiab tsis tu ncua.

Nws yog ib qho tseem ceeb uas yuav tsum ua raws li cov lus qhia tshuaj xyuas no kom tsis txhob muaj kev phom sij thiab tawg thaum siv graphite crucibles.

Graphite crucibles feem ntau yog siv rau cua sov cov ntaub ntawv sim. Lawv muaj ntau qhov ntau thiab tsawg thiab ntau hom, tso cai rau kev xaiv cov crucible tsim nyog raws li tus nqi, hom, thiab thermal expansion ntawm cov ntaub ntawv raug rhuab. Nws yog ib qho tseem ceeb kom tsis txhob overfilling lub crucible nrog cov khoom siv rhuab, vim nws tuaj yeem ua rau muaj xwm txheej thaum kev sim thiab cuam tshuam rau crucible lub neej. Tsis tas li ntawd, thaum lub crucible tau rhuab mus rau qhov kub siab, feem ntau nyob ib ncig ntawm 400-500 ° C, nws yog ib qho tseem ceeb uas yuav tsum tau ceev faj thiab tsis txhob kov nws nrog txhais tes vim nws tuaj yeem ua rau kub hnyiab heev.

Kev xaiv cov khoom siv rau graphite crucibles suav nrog cov hauv qab no:

Refractoriness: Graphite crucibles yuav tsum muaj siab refractoriness kom tiv taus qhov kub thiab txias. Yog li ntawd, nws yog ib qho tseem ceeb los ntsuas qhov hluav taws kub ntawm cov khoom siv graphite crucible kom ntseeg tau tias muaj kev nyab xeeb.

Chemical Stability: Graphite crucibles feem ntau siv rau hauv cov txheej txheem tshuaj corrosive. Yog li ntawd, tshuaj stability ntawm cov khoom crucible yog ib qho tseem ceeb kom txo tau corrosion.

Hardness thiab Toughness: Lub hardness thiab toughness ntawm graphite crucible khoom yuav tsum tau txiav txim siab los tiv thaiv brittle puas thaum siv.

Los ntawm kev ua raws li cov txheej txheem xaiv cov khoom saum toj no, peb tuaj yeem ua kom pom qhov ua tau zoo ntawm graphite crucibles.

Peb cia siab tias cov kev tshuaj xyuas thiab kev xaiv cov khoom no muab cov kev pom zoo rau kev tsim thiab siv cov graphite crucibles, tso cai rau kev nyab xeeb thiab ua haujlwm tau zoo.