Cov xim zirconia qhia cov xim nplua nuj feem ntau vim yog qhov sib txawv ntawm lub ntiaj teb tsis tshua muaj cov ntsiab lus hlau, oxides thiab lwm yam khoom siv. Raws li nws cov biocompatibility zoo, zoo heev metallic luster, thiab zoo mechanical zog, xim zirconia ceramics tau nce dav siv nyob rau hauv lub neej txhua hnub, nrog rau kev kho mob thiab kho hniav cov ntaub ntawv, kho kom zoo nkauj industries, thiab mobile smartphone terminals thiab lwm yam teb.
Kev npaj ntawm Xim Zirconia Ceramics
Kev npaj cov xim zirconia yog qhov tseem ceeb kom cov xim tuaj yeem sib npaug hauv zirconia matrix. Rau cov khoom siv sib xyaw ua ke, tshwj xeeb tshaj yog cov nanocomposite ceramics, vim qhov me me me, qhov loj ntawm qhov chaw, thiab qhov loj electrostatic attraction thiab van der Waals quab yuam ntawm cov toner hais thiab zirconium oxide matrix hais, nws yog ib qho yooj yim rau cov toner hais thiab zirconium. oxide matrix hais rau agglomerate, uas yuav tsis tsuas ua rau cov xim tsis sib xws ntawm nanocomposite ceramics, tab sis kuj cuam tshuam rau nws cov khoom siv kho tshuab.
Yog li, tus yuam sij los npaj cov xim zirconia ceramics nrog cov khoom siv zoo heev thiab chromaticity nyob rau hauv seb qhov sib xyaw ntawm cov hmoov hmoov tuaj yeem kov yeej. Txhawm rau npaj cov zirconia ceramics nrog kev ua tau zoo thiab ntau yam xim, yuav tsum pom cov txheej txheem dispersion haum. Cov kev npaj hauv qab no feem ntau siv:
Khoom Phase Mixing
Txoj kev no yog txoj kev siv ntau tshaj plaws hauv kev lag luam los npaj cov xim zirconia ceramics. Oxide hais xws li colorants thiab mineralizers yog tov thiab pob-milled nrog ruaj khov zirconia nanopowder raws li ib tug tej yam tshuaj sib piv. Cov khoom siv yog ces Nws yog refined thaum lub sij hawm no, thiab phenomena xws li micro-cracks, lattice distortion, thiab nto zog nce uas muaj txiaj ntsig zoo rau kev paub txog qhov kub thiab txias tshuaj tiv thaiv tshwm sim. Nws muaj qhov zoo ntawm cov txheej txheem yooj yim, tus nqi qis, kev ua haujlwm yooj yim, thiab kev lag luam yooj yim. Txawm li cas los xij, txoj kev no tsis tuaj yeem kov yeej qhov teeb meem ntawm nanoparticle agglomeration.
Chemical Co-Precipitation
Txoj kev no yog siv zirconium ntsev, stabilizer ntsev thiab cov xim ion ntsev tov kom sib tov, hnov mob nrog alkali los yog carbonate, thiab lwm yam los ua ke tsim hydroxide los yog carbonate los nag, thiab tom qab ntawd kub thiab decompose kom tau zirconium oxide puas hmoov. . Cov txheej txheem yog qhov nyuaj, tab sis cov hmoov tau txais muaj purity siab thiab ua tau zoo heev. Nyob rau tib lub sijhawm, kev saib xyuas yuav tsum tau them nyiaj rau kev tsim cov tawv agglomerates thaum siv cov tshuaj los nag lossis daus.
Kua Phase Infiltration
Qhov kom zoo dua ntawm txoj kev no yog tias cov xim ions tuaj yeem sib xyaw ua ke hauv zirconia matrix, thiab cov ntaub ntawv sib xyaw thiab cov ntaub ntawv gradient tuaj yeem npaj tib lub sijhawm. Tsis tas li ntawd, kev txhaj tshuaj molding tuaj yeem siv tau kom tau txais zirconia ntsuab lub cev ntawm cov duab sib txawv, thiab tom qab ntawd xim zirconia ceramics ntawm cov duab sib txawv tuaj yeem npaj los ntawm cov kua theem infiltration.
Sintering ntawm Xim Zirconia Ceramics
Txoj kev sintering tseem cuam tshuam rau kev ua haujlwm thiab xim ntawm cov xim zirconia ceramics. Nrog rau kev qhuab qhia thiab kev txhim kho ntawm kev tshawb fawb thiab thev naus laus zis, ntxiv rau cov txheej txheem sintering, ntau txoj kev sintering tshiab tau tshwm sim:
Spark Plasma Sintering
Qhov loj tshaj ntawm txoj kev no ntawm lub toughness ntawm zirconia ceramics yog sintering kub, ua raws li lub sij hawm sintering. Tom qab kev sim, qhov zoo tshaj plaws sintering kub yog 1400 degree thiab lub sij hawm sintering zoo yog 5 feeb. Cov zirconia ceramics sintered los ntawm txoj kev no muaj siab hardness thiab tawg toughness.
Microwave Sintering
Microwave sintering muaj qhov zoo dua tsis tau hloov dua li cov txheej txheem sintering. Nws yog ib txoj kev cua sov tag nrho. Cov khoom siv hloov pauv lub zog microwave absorbed rau hauv lub zog intermolecular kinetic zog thiab thermal zog kom ua tiav cov nyhuv ntawm tag nrho cov cua sov ntawm cov khoom. Sab hauv kub gradient ntawm cov khoom yog me me, yog li nws tsis tshua muaj kev tawg ntawm cov khoom vim cua sov tsis sib xws. . Lub cev lub cev ntawm zirconia npaj los ntawm txoj kev sintering no zoo dua.
Xim Classification ntawm Xim Zirconia Ceramics
Liab System
Qee cov kev tshawb fawb tau pom tias hlau oxide (Fe2O3) yog siv los ua cov xim thiab 3YSZ yog siv los ua cov matrix los npaj cov xim liab-liab zirconia ceramics. Tus nqi redness tuaj yeem ncav cuag li 20, thiab nrog rau tus nqi yellowness siab, nws cov xim tsis tuaj yeem ua tau raws li qhov xav tau liab, thiab ntxiv cov hlau oxide zoo heev txo cov khoom siv ntawm 3YSZ system, zoo heev txwv nws daim ntawv thov kev lag luam. Yog li ntawd, cov ceramics liab tau dhau los ua hom tsis tshua muaj ntawm ceramics uas tsis tuaj yeem tsim khoom loj.
Dub System
Txij li cov khoom siv raw khoom cobalt oxide tsis tshua muaj thiab kim, txhawm rau txo cov nqi, cov neeg siv cobalt-dawb dub zirconia ceramic xim npaj los ntawm MnO2, Fe2O3, thiab Cr2O3 ua raw khoom los hlawv spinel hauv peb xim sib txawv, uas yog, tsaus nti. Brown ferrochrome spinel, tsaus liab ferromanganese spinel, tsaus ntsuab chromium manganese spinel. Los ntawm kev kho qhov kev faib ua feem ntawm cov khoom xyaw los tswj cov ntsiab lus ntawm txhua tus spinel, thiab peb cov xim sib cuam tshuam nrog ib leeg, ib qho xim dub ruaj khov tuaj yeem tsim tau, uas txo cov nqi thiab txhim kho kev lag luam.
Blue System
Tam sim no, xiav ceramic pigments feem ntau suav nrog vanadium-zirconium xiav cov khoom siv xim, cobalt-aluminium spinel, nickel-aluminium spinel thiab spinel-hom xim uas siv lwm yam ions los hloov txoj haujlwm cobalt ion, hexaaluminate Cov xim muaj feem cuam tshuam los ntawm ntsev thiab lanthanum colorants. , nyob rau hauv lub hauv paus ntawm kev ua kom cov xim rendering kev ua tau zoo thiab txhua yam khoom, txuas ntxiv mus tshawb xyuas ib puag ncig tus phooj ywg thiab kev lag luam xiav xim tseem yog qhov tseem ceeb ntawm cov lus qhia tam sim no.
