Thaum cov qauv ntawmcov khoom siv silicon carbide ceramics uas muaj qhov porousthawj zaug pom hauv chav kuaj mob, cov qauv zoo li lub zes uas tau nthuav tawm hauv qab lub tshuab hluav taws xob zoo li lub zes muv uas tau nthuav dav ib lab npaug. Cov khoom siv tshwj xeeb no nrog porosity ntawm 15-60% tab tom maj mam txav mus los ntawm cov chav sib xyaw ntawm cov cav aerospace mus rau hauv peb lub neej txhua hnub.
Hauv lub tshuab hluav taws xob roj ntawm 1600 ℃, cov khoom siv niaj hnub tau hloov mus ua hlau yaj ntev lawm, tab sis cov silicon carbide uas muaj qhov porous tseem ruaj khov zoo kawg nkaus. Xyoo tas los, thaum mus xyuas Shanghai Institute of Ceramics ntawm Suav Academy of Sciences, tus kws tshawb fawb tau ua qauv qhia txog kev sim nthuav: muab daim ntawv silicon carbide uas muaj qhov porous tso rau hauv cov nplaim oxygen-acetylene (kwv yees li 3000 ℃), lub ntsuas kub ntawm sab nraub qaum qhia tau tias nws tsuas yog nce 72 ℃. Qhov kev tiv thaiv cua sov no los ntawm cov qauv siv lead ua β-SiC ua rau nws yog "lub cuab yeej tsis pom" rau lub kaw lus tiv thaiv cua sov ntawm lub dav hlau. Zoo dua, cov qhov me me micron zoo li ntau lub qhov cub me me, txo qhov ua haujlwm kub los ntawm 40-60% piv rau cov khoom siv ceramic khov kho.
Tej zaum txawm tias cov kws tshawb fawb txog cov ntaub ntawv tsis xav tias hom ceramic no, uas tau tsim los rau qhov chaw ib puag ncig hnyav, yuav muaj kev hloov pauv thib ob hauv kev kho mob. Kev tshawb fawb hauv tsev kho mob luam tawm hauv Journal of Biomaterials xyoo 2024 qhia tau hais tias silicon carbide scaffolds nrog cov qauv gradient pore loj (5μm ntawm qhov chaw thiab 200μm ntawm hauv qab) muaj qhov nrawm ntawm kev sib koom ua ke ntawm pob txha 2.3 npaug ntau dua li cov titanium alloy implants ib txwm muaj.
Cov txheej txheem ntawm kev npaj cov porous silicon carbide nws tus kheej yog ib qho khawv koob tshuaj lom neeg. Los ntawm txoj kev ua tus neeg sawv cev pore-forming (feem ntau yog polymethyl methacrylate microspheres) lossis txoj kev sintering, cov kws ua khoom siv tuaj yeem tswj tau cov yam ntxwv pore zoo li cov tshuaj tsw qab. Qhov nthuav yog, daim ntawv pov thawj patent tshiab ntawm 3M Company hauv Tebchaws Meskas qhia tau hais tias kev siv cov diatomite rov ua dua tshiab ua tus qauv ntuj tsis yog tsuas yog txo cov nqi tsim khoom los ntawm 18%, tab sis kuj tau txais cov qauv bionic zoo li cov pob txha coral. Cov txheej txheem "hloov cov khib nyiab mus rau hauv cov khoom muaj nqis" no sib haum nrog Taoist txoj kev txawj ntse ntawm "qhov muaj txiaj ntsig ntawm qhov tsis muaj txiaj ntsig".
Daim Ntawv Thov
- Hauv thaj chaw ntawm kev tiv thaiv ib puag ncig:Raws li cov khoom siv tseem ceeb ntawm cov lim dej diesel tsheb particulate (DPF), nws tuaj yeem ntes tau 99.7% ntawm PM2.5
- Kev Hloov Pauv Zog:Kev txhawb nqa electrode rau cov roj cell oxide khov kho (SOFC) ua rau muaj kev ua haujlwm zoo dua txog 65%
- Kev kho mob:Cov qauv ntawm cov pob txha scaffolds luam tawm 3D txhawb kev loj hlob ntawm cov hlwb thiab ua kom lub voj voog kho mob luv dua 30%.
- Kev tsim khoom semiconductor:Lub neej ntawm cov wafer polishing pads tau ntev dua peb zaug, thiab TSMC cov txheej txheem 3nm tau raug yuav ntau heev.
Lub sijhawm tshaj tawm: Lub Xya Hli-30-2025