Fused alumina yog qhov ua tau zoo ntawm -cov khoom siv tshwj xeeb alumina, feem ntau yog tsim los ntawm -Al₂O₃. Nws feem ntau yog tsim los ntawm melting industrial alumina los yog calcined alumina ntawm qhov kub thiab txias hauv hluav taws xob arc rauv. Nws muaj purity siab, siab hardness, siab refractoriness, thiab zoo heev tshuaj stability.
Cov yam ntxwv tseem ceeb ntawm kev ua haujlwm:
High purity: Dawb corundum- hom fused alumina muaj Al₂O₃ cov ntsiab lus Ntau dua lossis sib npaug li 99%, cov impurities tsawg (xws li Na₂O < 0.5%), cov ntsiab lus tsis tshua muaj hlau nplaum, thiab tsis tshua muaj cov khoom ua tiav.
High hardness: Mohs hardness ncav cuag 9.0, Vickers hardness HV 2100-2300 kg / mm², ncav cuag pob zeb diamond, exhibiting muaj zog hnav tsis kam.
High refractoriness: Melting point kwv yees li 2100-2250 degree, nws tuaj yeem siv tsis tu ncua hauv qab 1900 degree, ua rau nws ua tau zoo heev - cov khoom kub resistant. Zoo thermal stability: Tsawg coefficient ntawm thermal expansion (3.34–6.63 × 10⁻⁶/K), zoo thermal shock resistance, haum rau rov qab thermal cycling ib puag ncig.
Dense structure and high toughness: Crystals are mostly polygonal granular with dense packing, showing a porosity of 6%–10%, combining high strength and toughness, suitable for high-load working conditions.
Kev sib tsoo zoo heev: tus kheej zoo-ntxuav lub zog, qhov loj me me, tsis yooj yim rau clog nozzles, siab sib tsoo efficiency, thiab tsis tshua muaj qhov kub ntawm qhov chaw ua haujlwm.
Cov haujlwm tseem ceeb thiab thaj chaw siv:
Sib tsoo thiab polishing cov ntaub ntawv: Dav siv los ua qib siab -qib abrasive hauv kev tsim cov khoom sib tsoo xws li kev sib tsoo log, abrasive siv, thiab sib tsoo pastes. Haum rau precision sib tsoo ntawm siab- hardness hlau (xws li stainless hlau, titanium alloys, thiab siab- ceev steel), tshwj xeeb tshaj yog haum rau qhuav sib tsoo thiab daim ntaub ntawv uas yuav tsum tau zoo nto nto.
Sandblasting thiab kev kho saum npoo: Siv rau kev tshem tawm xeb, tshem tawm oxide txheej, tshem tawm burr, thiab pretreatment ua ntej txau hlau workpieces los txhim kho txheej adhesion. Vim tias nws tsis muaj hlau, sulfur, lossis tshuaj chlorine, nws tuaj yeem siv rau hauv siab -kev huv huv xws li cov khoom siv kho mob, aerospace, thiab cov khoom ua zaub mov.
Cov Khoom Siv Hluav Taws Xob: Siv los ua cov khoom sib xyaw lossis cov khoom tseem ceeb hauv kev tsim cov cib refractory, castables, crucibles, thiab lwm yam, rau siab -kub kilns, haum rau siab - kub ib puag ncig xws li iav kiln, ceramic firing furnaces, thiab metallurgical furnaces. Fused alumina refractories muaj thermal poob siab tsis kam, qis reheat shrinkage, thiab muaj zog corrosion kuj.
Ceramics thiab Electronics Devices: Siv rau hauv kev tsim cov khoom siv high-qib alumina ceramics, xws li insulating ceramics, structural ceramics, thiab hluav taws xob substrates, tau txais txiaj ntsig los ntawm nws cov rwb thaiv tsev siab, thermal conductivity, thiab tshuaj inertness ^.
Cov ntaub ntawv rwb thaiv tsev: Ua ke nrog lwm cov ntaub ntawv raw, nws tuaj yeem ua rau hauv alumina insulating refractory cib, siv los ua cov txheej txheem rwb thaiv tsev ntawm siab - cov khoom siv kub, nrog rau qhov zoo xws li lub teeb yuag, thermal conductivity tsawg, thiab lub zog tseem ceeb - txuag cov teebmeem.
