Kev faib tawm ntawm qhov loj ntawm cov khoom me me
Kev faib tawm ntawm cov khoom me me yog hais txog qhov sib piv (qhia ua feem pua ​​ntawm cov khoom me me) ntawm cov khoom me me hauv kaolin ntuj hauv ib qho ntau ntawm cov khoom me me sib txawv (qhia ua mesh loj ntawm millimeters lossis micrometers). Cov yam ntxwv ntawm kev faib tawm ntawm cov khoom me me ntawm kaolin yog qhov tseem ceeb heev rau kev xaiv thiab kev siv cov ores. Nws qhov loj me ntawm cov khoom me me muaj qhov cuam tshuam loj rau nws cov yas, viscosity av nkos, peev xwm pauv ion, kev ua haujlwm molding, kev ua kom qhuav, thiab kev ua haujlwm sintering. Kaolin ore xav tau kev ua haujlwm thev naus laus zis, thiab seb nws puas yooj yim rau kev ua tiav rau qhov xav tau fineness tau dhau los ua ib qho ntawm cov qauv rau kev ntsuam xyuas qhov zoo ntawm cov khoom me me. Txhua lub chaw haujlwm kev lag luam muaj cov khoom me me thiab fineness tshwj xeeb rau kev siv sib txawv ntawm kaolin. Yog tias Tebchaws Meskas xav kom kaolin siv ua txheej kom tsawg dua 2 μ Cov ntsiab lus ntawm m suav rau 90-95%, thiab cov ntawv sau ntawv tsawg dua 2 μ Qhov sib piv ntawm m yog 78-80%.

Kev ua yas
Cov av nplaum uas tsim los ntawm kev sib xyaw ua ke ntawm kaolin thiab dej tuaj yeem hloov pauv raws li lub zog sab nraud, thiab tom qab lub zog sab nraud raug tshem tawm, nws tseem tuaj yeem tswj tau qhov khoom deformation no, uas hu ua plasticity. Plasticity yog lub hauv paus ntawm cov txheej txheem tsim ntawm kaolin hauv cov khoom siv ceramic, thiab nws tseem yog qhov qhia txog kev ua haujlwm tseem ceeb ntawm cov txheej txheem. Feem ntau, plasticity index thiab plasticity index yog siv los sawv cev rau qhov loj ntawm plasticity. Plasticity index yog hais txog cov kua dej noo ntawm cov khoom siv kaolin av nplaum rho tawm cov yas dej noo, qhia ua feem pua, piv txwv li W plasticity index = 100 (W kua dej txwv - W plasticity txwv). Plasticity index sawv cev rau qhov formability ntawm cov khoom siv kaolin av nplaum. Lub nra hnyav thiab deformation ntawm lub pob av nplaum thaum lub sijhawm nias thiab tsoo tuaj yeem ntsuas ncaj qha siv lub ntsuas plasticity, qhia hauv kg · cm. Feem ntau, qhov siab dua qhov plasticity index, qhov zoo dua nws cov formability. Plasticity ntawm kaolin tuaj yeem faib ua plaub theem.

Lub zog yas Lub zog yas
Muaj zog plasticity> 153.6
Nruab nrab plasticity 7-152.5-3.6
Tsis muaj zog plasticity 1-7<2.5
Tsis yog plasticity<1
Kev Koom Tes

Kev khi tau txhais tau hais tias kaolin muaj peev xwm sib xyaw nrog cov khoom siv tsis yog yas los tsim cov av nplaum yas thiab muaj qee qhov zog ziab. Kev txiav txim siab ntawm kev khi tau suav nrog kev ntxiv cov xuab zeb quartz txheem (nrog cov khoom sib xyaw ntawm 0.25-0.15 qhov loj me ntawm cov khoom me me suav txog 70% thiab 0.15-0.09 hli qhov loj me ntawm cov khoom me me suav txog 30%) rau kaolin. Cov xuab zeb ntau tshaj plaws thaum nws tseem tuaj yeem tswj tau lub pob av nplaum yas thiab lub zog flexural tom qab ziab yog siv los txiav txim siab nws qhov siab. Cov xuab zeb ntxiv ntau dua, qhov muaj zog ntawm cov av kaolin no muaj peev xwm khi tau zoo dua. Feem ntau, kaolin nrog cov yas muaj zog kuj muaj peev xwm khi tau zoo.

Kev ua kom qhuav
Kev ua kom qhuav yog hais txog kev ua tau zoo ntawm cov av nkos kaolin thaum lub sijhawm ziab. Qhov no suav nrog kev ziab shrinkage, lub zog ziab, thiab kev ziab rhiab heev.

Kev ziab qhuav yog hais txog kev qhuav ntawm cov av nplaum kaolin tom qab ziab thiab ziab. Cov av nplaum kaolin feem ntau raug ziab thiab ziab ntawm qhov kub ntawm 40-60 ℃ txog tsis pub tshaj 110 ℃. Vim yog dej ntws tawm, qhov deb ntawm cov khoom me me raug luv dua, thiab qhov ntev thiab qhov ntim ntawm cov qauv raug ntsws. Kev ziab qhuav yog muab faib ua linear shrinkage thiab volumetric shrinkage, qhia ua feem pua ​​ntawm kev hloov pauv ntawm qhov ntev thiab qhov ntim ntawm cov av nplaum kaolin tom qab ziab mus rau qhov hnyav tas li. Kev ziab qhuav ntawm kaolin feem ntau yog 3-10%. Qhov me me ntawm cov khoom me me, qhov loj dua ntawm thaj chaw tshwj xeeb, qhov zoo dua qhov plasticity, thiab qhov loj dua qhov ziab qhuav. Kev ntsws ntawm tib hom kaolin sib txawv nyob ntawm qhov ntau ntawm cov dej ntxiv.

Cov khoom siv ua los ntawm av nplaum tsis yog tsuas yog muaj cov kev cai nruj rau qhov plasticity, adhesion, drying shrinkage, drying strength, sintering shrinkage, sintering properties, fire resistance, thiab post firing whiteness ntawm kaolin, tab sis kuj muaj cov khoom siv tshuaj lom neeg, tshwj xeeb tshaj yog qhov muaj cov ntsiab lus chromogenic xws li hlau, titanium, tooj liab, chromium, thiab manganese, uas txo qhov dawb tom qab firing thiab tsim cov pob.