1. Dab tsi yog high-alumina ceramic khoom?
High-alumina ceramic khoom yog cov khoom siv ceramic nrog alumina (Al₂O₃) ua cov khoom tseem ceeb, feem ntau muaj tsawg kawg yog 85% alumina. Raws li cov ntsiab lus alumina sib txawv, nws tuaj yeem muab faib ua ntau pawg xws li high-alumina thiab corundum.
2. Cov yam ntxwv tseem ceeb ntawm cov khoom siv alumina ceramic yog dab tsi?
High refractoriness: muaj peev xwm tiv taus qhov kub thiab txias ib puag ncig, feem ntau refractoriness tshaj 1700 degree.
High mechanical zog: muaj compression zoo heev, khoov thiab cuam tshuam tsis kam.
Zoo thermal stability: tuaj yeem tiv taus qhov kub thiab txias hloov tsis tau tawg.
Cov tshuaj tiv thaiv corrosion zoo heev: muaj zog tiv thaiv cov tshuaj lom neeg xws li acid, alkali, slag, thiab lwm yam.
Tsawg thermal expansion coefficient: me me hloov pauv ntawm qhov kub thiab txias.
3. Dab tsi yog daim ntawv thov teb ntawm high-alumina ceramic cov ntaub ntawv?
Kev lag luam metallurgical: siv rau hauv cov ntaub ntawv ntawm steelmaking furnaces, nruam casting khoom, molten hlau tso tsheb hlau luam, thiab lwm yam.
Kev lag luam fais fab: siv rau cov khoom siv hluav taws xob kub kub, cov khoom siv hluav taws xob sib hloov thiab lwm yam khoom siv.
Mechanical kev lag luam: manufacturing high-temperature bearings, seals, nozzles, thiab lwm yam.
Kev lag luam tshuaj lom neeg: siv rau cov kub kub reactors, corrosion-resistant ntim, thiab lwm yam.
Kev lag luam hluav taws xob: siv los ua cov khoom siv hluav taws xob xws li insulators thiab substrates.
4. Dab tsi yog cov txheej txheem kev npaj ntawm high-aluminium ceramic cov ntaub ntawv?
Raw khoom npaj: xaiv high-purity alumina hmoov thiab tsim nyog binders thiab additives.
Kev sib xyaw thiab molding: Tom qab cov ntaub ntawv raw khoom sib tov sib xyaw, lawv tau molded los ntawm qhuav nias, isostatic nias, grouting, thiab lwm yam.
Qhuav thiab sintering: Lub cev molded yog qhuav thiab ces sintered nyob rau hauv ib tug high-kub kiln kom tau cov khoom ceramic ntom ntom.
Kev ua haujlwm thiab kev sim: Cov khoom siv sintered ceramic yog raug rau cov khoom siv kho tshuab tsim nyog thiab kev kuaj xyuas zoo kom ntseeg tau tias lawv ua tau raws li cov qauv tsim.
5. Yuav ua li cas txhawm rau txhim kho kev ua haujlwm ntawm cov khoom siv high-aluminium ceramic?
Optimize cov khoom raw piv: xaiv high-purity alumina hmoov thiab ntxiv tsim nyog modifiers los txhim kho kev ua tau zoo.
Txhim kho cov txheej txheem molding: siv cov tshuab molding siab heev, xws li kub nias sintering, kub isostatic nias, thiab lwm yam., txhawm rau txhim kho qhov ntom ntawm lub cev.
Ua kom lub sintering kub thiab lub sij hawm: tsim nyog tswj lub sintering kub thiab lub sij hawm los xyuas kom meej lub densification thiab uniformity ntawm cov khoom.
Kev kho deg thiab txheej tshuab: Kev kho deg lossis txheej txheej kub thiab corrosion resistant coatings ntawm cov khoom siv ceramic los txhim kho lawv cov kev ua tau zoo.
6. Dab tsi yog cov teeb meem thiab kev daws teeb meem ntawm high-alumina ceramic cov ntaub ntawv?
Cracks thiab tsis xws luag: Cracks thiab tsis xws luag yuav tshwm sim thaum lub sij hawm molding thiab sintering txheej txheem. Cov kev daws teeb meem suav nrog kev ua kom zoo ntawm cov txheej txheem molding, nruj me ntsis tswj cov sintering tsis, thiab ntxiv dag zog rau kev sim thiab kev tswj kom zoo.
Sintering shrinkage: High-alumina ceramic cov ntaub ntawv yuav ntsws thaum lub sij hawm sintering. Cov pwm loj yuav tsum tsim kom tsim nyog thiab cov txheej txheem sintering yuav tsum tau tswj kom meej.
Tsis txaus thermal poob siab tsis kam: Txhim kho cov thermal shock tsis kam ntawm cov khoom tuaj yeem ua tiav los ntawm kev ua kom zoo ntawm cov khoom siv mis, ntxiv cov tshuaj toughening, thiab lwm yam.
7. Qhov txawv ntawm high-alumina ceramics thiab zoo tib yam ceramics?
Qhov sib txawv tseem ceeb nyob hauv cov ntsiab lus alumina thiab kev ua haujlwm. High-alumina ceramics muaj cov ntsiab lus alumina siab dua, feem ntau ntau dua 85%, thaum cov ceramics zoo tib yam muaj cov ntsiab lus alumina qis dua. High-alumina ceramics muaj ntau dua refractoriness thiab tshav kub tsis kam thiab haum rau qhov kub thiab txias. High-alumina ceramics muaj zog dua txhua yam thiab hnav tsis kam. High-alumina ceramics yog resistant rau tshuaj corrosion.
