Ntxiv nrog rau qhov kev muab qhab nia ntxiv, qhov ntom ntawmHigh Alumina Cibtseem muaj kev cuam tshuam ncaj qha los ntawm cov khoom siv ntawm qab no. Nws cov tub ntxhais lub cev yog ua kom zoo dua ntawm sintering tus cwj pwm thiab ntom ntom los ntawm kev tswj hwm lub cev thiab tshuaj ntawm cov khoom siv raw:
I. Tshuaj muaj pes tsawg leeg thiab kev coj dawb huv
1. Al₂o₃ cov ntsiab lus thaum Al₂o₃ cov ntsiab lus yog ntau dua lossis sib npaug ntawm cov sinelting, thiab qhov ceev tau txhim khu thaum muaj 3.0g / cm³); Thaum cov ntsiab lus yog txo qis rau hauv qab 60%, Mullite theem nce (ntom 3.16g / cm³), thiab cov kev txwv sab sauv txo qis.
2. Cov neeg tsis raug mob cuam tshuam rau fe₂o₃ (tsawg dua los yog sib luag rau 1.5%): Ib qho me me txhawb kev tsim cov kua theem (txog 1300 degree) thiab ua kom lub pores; Qhov nyiaj ntau dhau (> 3%) ua rau muaj ntau dhau ntawm cov kua dej ua kua thiab nce ntxiv hauv porosity (cov porosity (cov porosent pom tseeb nce siab los ntawm 12% rau 18%). Tutor (tsawg dua los yog sib npaug rau 2.0%): Ua cov tshuaj khov kho nrog al₂o₃, inhibits txawv txav qoob loo, thiab txhim kho qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom. Cov nyiaj tau ntau dhau ntawm qhov siab {{8} yaj meting txhuas cov npe (al₂tio₅), uas cuam tshuam sintering. Alkali hlau oxides (k₂o + naivo tsawg dua los yog sib npaug rau 0.5%): txo cov kua voscosity, tab sis muaj ntau dhau los ua kua dej tsis dhau thiab nyob twj ywm.
2. High alumina cib mineral cov ntxhia composition thiab cov qauv siv lead ua
1. Bauxite theem diatopore: nplua {1} nplej rau tom qab kev kho dua tshiab, nrog qhov siab dua, muaj qhov ntom ntom txog 2.85g / cm³;
Hom GIBSBURG: coarse {{{{0} nplej corundum yog tsim tawm tom qab recorinity, thiab siab}}}} qhov siab moulding yog yuav tsum tau mus txog 2.70g / cm³.
2 Nws koob {{6} Zoo li crystal interlaced tus qauv tuaj yeem txhim kho sintering shrinkage (los ntawm 1.0%), ua rau muaj kev hloov pauv.
III. Particle morphology thiab cov yam ntxwv saum npoo
1. Particle duab Angular hais cov lus (Bully Bauxite (Bulk ntom
Cov kheej kheej (fused corundum): bulk ntom 2.2-2.4g /,4%-15% hmoov zoo yuav tsum tau ntxiv kom txhim kho lub interface bonding.
2. Thaum lub nplaim dej ({{{1} ake ake ake ake ake ay tsim tau yooj yim tsim tau yooj yim rau 5% -8%; Txawm li cas los xij, cov hydroxyl decomposes thaum sintering los ua cov dej vapor. Yog tias nws tsis raug rho tawm nyob rau lub sijhawm, nws yuav ua rau sab hauv bubbling (porosity nce los ntawm 2% -3%).
IV. Ntxiv thiab Scixtures
1. Sintering Aid B₂o₃ (0.5% -1.0%): Txo cov sintering kub (los ntawm kev tsim cov kua dej ntawm cov kua, thiab nce qhov ntom ntom ntawm 0.1-0.2g / cm³;
Ti₂ (1.0% -2.0%): Inhibit lub coarsening ntawm corundum nplej (nruab nrab grain loj me me txo los ntawm 50μm txog 20μm), thiab ua kom zoo nkauj.
2. Kev tiv thaiv ntxivos
V. High Alumina Cib Raw Khoom Siv Khoom Siv Pretrecent Txheej Txheem
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2. Acid kho kom zoo thiab kev tshem tawm bauxite tau soakite tau soaked nyob rau hauv 5% hydrochloric acid, thiab Fi₂o₃ cov ntsiab lus poob qis ntawm 2.5% rau 0.8%. Tom qab Sinining, qhov ceev tau nce los ntawm 2.65g / cm³ rau 2.80g / cm³.
