Thaum yuav khoomdawb fused alumina, koj feem ntau ntsib ntau yam khoom nrog cov nqi sib txawv, qauv, thiab cov txheej txheem. Yog li ntawd, nws yog ib qho tseem ceeb kom nkag siab txog cov yam ntxwv ntawm dawb corundum uas yuav tsum tau saib xyuas.
1. Particle Loj ntawm Dawb txhuas oxide:
Cov particle loj yuav tsum tau rau dawb fused alumina siv nyob rau hauv cov ntaub ntawv refractory yog feem ntau kuj yooj yim. Txawm li cas los xij, nrog kev nce qib hauv kev ua cov khoom siv refractory, ntau lub tuam txhab tam sim no xav tau ntau qhov tseeb particle loj faib nyob rau hauv cov lus qhia me me.
Thaum Yuav Khoom Dawb corundum rau Abrasive Daim Ntawv Thov: Thaum lub teb chaws tus qauv qauv feem ntau raug txiav txim siab, yuav tsum tau them nyiaj ntau dua rau cov khoom loj me me hauv qhov tshwj xeeb. Yog tias tib tus qauv xav tias ntxhib dhau los yog zoo heev hauv kev siv tiag tiag, nws muaj feem cuam tshuam rau qhov loj me me ntawm cov khoom siv sib txawv.
2. Alumina Cov ntsiab lus ntawm Dawb aluminium oxide:
Alumina ( -Al₂O₃) nyob rau hauv dawb fused alumina yog lub luag haujlwm tseem ceeb rau nws qhov siab - kub tsis kam, hnav tsis kam, thiab hardness. Yog li ntawd, cov ntsiab lus alumina yog qhov ntsuas qhov tseem ceeb tshaj plaws. Alumina cov ntsiab lus feem ntau cuam tshuam rau qhov zoo ntawm cov hmoov alumina nyoos thiab lub sijhawm smelting.
3. Sodium Cov ntsiab lus ntawm Dawb aluminium oxide:
Raws li tau hais los saum no, -Al₂O₃ yog lub luag haujlwm tseem ceeb rau nws qhov siab -kub tsis kam, hnav tsis kam, thiab hardness. Sodium oxide, thaum smelting, yuav hnov mob nrog sodium peraluminate, txo qhov tsim ntawm -Al₂O₃ hauv corundum dawb thiab cuam tshuam rau nws cov khoom. Kev tswj hwm cov ntsiab lus sodium yuav tsum tau ua kom lub sij hawm smelting, kev siv hluav taws xob ntau dua, thiab kev siv cov khoom siv tsawg -sodium alumina, yog li nce nqi.
4. Smelting txheej txheem ntawm Dawb txhuas oxide:
Muaj ob txoj kev smelting tseem ceeb: tilting rauv smelting thiab nyob twj ywm rauv smelting. Ob txoj hauv kev tseem ceeb koom nrog cov electro- melting thiab recrystallization ntawm dawb fused alumina, tab sis cov txheej txheem sib txawv ua rau cov yam ntxwv sib txawv. Tilting furnaces tsim loj, industrially ua dawb corundum nrog ib tug high℃ntawm uniformity nyob rau hauv zoo; Qhov chaw nyob ruaj khov tsim cov corundum dawb nrog lub hauv paus zoo tab sis tsis ruaj khov rau sab nraud, tab sis lub sijhawm txias txias ua rau muaj qhov ntom ntom dua hauv qhov chaw. Hauv qee daim ntawv thov tshwj xeeb, qhov chaw nyob ruaj khov yog siv tshwj xeeb.
5. Bulk Density ntawm Dawb aluminium oxide:
Tej qhov ntom ntom qhia txog, rau qee qhov, particle ntim ceev, porosity, particle shape, thiab particle loj tis. Simply put, white fused alumina with high bulk density has high volume density, low porosity, rounded particle shape, and dispersed particle size distribution; conversely, dawb corundum nrog tsawg bulk ntom muaj tsawg ntim ntom, siab porosity, ntse particle zoo, thiab concentrated particle loj tis.
6. Whiteness ntawm Dawb txhuas oxide:
Dawb yog ntsuas los ntawm kev ntsuas tshwj xeeb whiteness. Txawm li cas los xij, rau cov ntawv thov uas xav tau cov xim siab thiab gloss, cov kev ntsuas tshwj xeeb tuaj yeem ua tau. Ordinary dawb fused alumina muaj ib tug whiteness ntawm ib ncig ntawm 90.
7. Kev huv huv ntawm Dawb txhuas oxide:
Kev huv huv sib raug rau qhov turbidity ntawm dawb fused alumina, ntsuas siv lub ntsuas turbidity tshwj xeeb. Nws feem ntau qhia txog cov hmoov av zoo uas ua rau cov khoom. Kev ntsuam xyuas pom tau yooj yim tuaj yeem ua tau los ntawm kev nchuav dej ntshiab rau hauv cov xim dawb corundum, nplawm, thiab saib xyuas cov dej turbidity. Kev ntxuav dej thiab cov kua qaub ntxuav cov txheej txheem tuaj yeem txhim kho kev huv.
8. Hardness ntawm Dawb txhuas oxide:
Hardness indicators muaj xws li Mohs hardness (scratch test) thiab microhardness (indentation test). Mohs hardness yog nyob ib ncig ntawm 9, thiab microhardness ntau yog 2200-2400 kg / mm².
9. Melting Point ntawm Dawb txhuas oxide:
Lub melting point ntawm dawb fused alumina yog 2250 degree, thiab lub siab tshaj plaws kev khiav hauj lwm kub yog 1900 degree. Feem ntau, cov ntsiab lus alumina siab dua thiab cov ntsiab lus sodium qis sib haum mus rau qhov siab dua melting point. Nws yog ib qho tsim nyog sau cia tias qee lub chaw tsim khoom ntxiv aluminium fluoride (AlF3) kom txo qis qhov chaw ntawm alumina thaum lub sij hawm smelting ntawm dawb corundum thiaj li yuav txuag tau cov nqi hluav taws xob. Qhov no yuav txo qhov melting point thiab lwm yam khoom ntawm cov khoom.
10. Dawb aluminium oxide Particle Shape:
Daim ntawv thov sib txawv yuav tsum tau ntse, sib npaug, lossis cov duab tiaj tus, nyob ntawm cov txheej txheem crushing. Crushing txheej txheem muaj xws li: cov menyuam crushing, puab tsaig crushing, Barmac crushing, hlau pob raj zeb crushing, ceramic pob raj zeb crushing, thiab cua dav hlau zeb crushing. Feem ntau, coated abrasives xav tau cov khoom ntse, thaum sandblasting thiab bonded tuag yuav tsum sib npaug hais.
Thaum kev soj ntsuam ze dua, koj yuav paub tias kev tsom mus rau tus nqi nkaus xwb thaum lub sijhawm yuav khoom tsis raug. Vim tias muaj cov khoom siv rov ua dua tshiab thiab cov khoom siv tsis zoo los ntawm kev tsim khoom, qee lub chaw tsim khoom yuav hais tus nqi qis heev. Txhawm rau nkag siab txog cov nqi ntawm lub Hoobkas, tus nqi ntawm cov khoom siv raw khoom muaj alumina hmoov thiab hluav taws xob noj yog qhov tseem ceeb ntawm cov nqi ntawm cov khoom siv dawb fused alumina. Yog tias tus nqi qis dua cov nqi no, nws tsis tuaj yeem yuav cov dawb corundum.
