Puas tau graphite crucible tawg? Cov graphite crucible pob thaum nws tau rhuab. Kuv tsis paub vim li cas nws tau tshwm sim. Txhawm rau zam dhau qhov xwm txheej no los ntawm kev tshwm sim ntxiv, muaj qee cov lus qhia raws li xyoo ntawm kev paub ntau lawm.
1. Cov qhuav ntoo crucible yog dheev rhuab rau qhov kub, ua rau nws tawg. Txawm hais tias Graphite crucibles muaj npe nrov rau lawv cov kev kub siab tiv taus, qhov kub yuav tsum tau tsa maj mam thiab ua haujlwm hauv kev cai. Hom txuj ci tshwj xeeb: "Tsis muaj cov khoom ntxiv, nws yuav siv sijhawm li 30 feeb rau preheat cov crucible mus txog xyoo 200℃thiab qhuav nws rau 60 feeb." Lub hom phiaj yog kom volatilize cov dej nyob saum npoo ntawm crucible. Nco ntsoov, cov kauj ruam no yog qhov tseem ceeb heev.
2. Thermal nthuav tawm ua rau cov crucible mus tawg. Tom qab ua haujlwm tiav, thaum graphite crucible tshwm liab, nco ntsoov txiav tawm cov khoom siv hlau txuas nrog phab ntsa huv si tam sim ntawd. Vim li cas: Cov khoom seem dhau los yuav cuam tshuam kev hloov cua sov, nce lub sijhawm ua kom tiav, thiab yooj yim ua rau muaj kev nthuav dav lossis tawg ntawm tus ntoo khaub zig.
Tu Txoj Kev:
Ua ntej tshaj, tshem tawm cov tshuaj los ntawm graphite crucible thiab ces ntxuav nws. Nws yuav tsum tau sau tseg tias cov ntaub ntawv khaws tshwj xeeb yog txiav txim siab raws li cov seem hauv Crucible. Nyob rau hauv ib txwm muaj xwm txheej, cov seem nyob rau ntawm phab ntsa crucible yog feem ntau inorganic comidustion seem, uas tuaj yeem ntxuav nrog cov kua qaub hydrochloric acid. Rau cov seem uas nyuaj rau huv, peb tsis tas txhawj txog ntau dhau. Lawv tuaj yeem rhaub kom huv si hydrochloric acid los yog nitric acid. Nco ntsoov tias koj tuaj yeem xaiv ib ntawm ob, tab sis siv tsis tau lawv tib lub sijhawm.