Hydroxypropyl methylcellulose (HPMC) muaj ntau daim ntawv thov tseem ceeb thiab cov txiaj ntsig hauv kev tsim cov khoom siv ceramic, uas muaj feem cuam tshuam nrog nws cov khoom siv lub cev thiab tshuaj lom neeg tshwj xeeb.
1. Txhim kho qhov kev ua tau zoo ntawm lub cev ntsuab
HPMC muaj cov khoom zoo thickening thiab nplaum, uas ua rau nws ua lub luag haujlwm tseem ceeb hauv theem tsim lub cev ntawm kev tsim cov khoom siv ceramic. Los ntawm kev ntxiv cov HPMC kom raug, qhov plasticity ntawm cov av nkos thiab kev ua haujlwm molding ntawm lub cev ntsuab tuaj yeem txhim kho tau zoo heev, ua kom lub cev ntsuab muaj lub zog siab thiab qhov chaw zoo tom qab molding. Tsis tas li ntawd, qhov thickening effect ntawm HPMC tuaj yeem tiv thaiv cov slurry los ntawm delaminating thaum lub sijhawm molding thiab ua kom muaj qhov sib npaug ntawm qhov ceev ntawm lub cev ntsuab, yog li txo qhov ua tau ntawm kev tawg lossis deformation hauv cov khoom tiav.
2. Txhim kho qhov kev ua kom qhuav ntawm lub cev ntsuab
Cov khoom siv ua los ntawm cov av nplaum ntsuab feem ntau yuav tawg lossis hloov pauv thaum lub sijhawm ziab, uas yog ib qho teeb meem uas tshwm sim ntau hauv kev tsim cov av nplaum. Kev ntxiv HPMC tuaj yeem txhim kho kev ua haujlwm ziab ntawm cov khoom siv ua los ntawm cov av nplaum ntsuab. Nws tswj tau qee yam dej noo thaum lub sijhawm ziab, txo qhov nrawm ntawm cov khoom siv ua los ntawm cov av nplaum ntsuab, thiab txo qhov kev ntxhov siab thaum lub sijhawm ziab, yog li tiv thaiv cov khoom siv ua los ntawm cov av nplaum ntsuab kom tsis txhob tawg. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem ua rau cov khoom siv ua los ntawm cov av nplaum ntsuab qhuav muaj cov qauv sib xws dua, uas pab txhim kho qhov ceev thiab cov khoom siv kho tshuab ntawm cov khoom tiav.
3. Txhim kho qhov kev ua tau zoo ntawm cov glaze
HPMC kuj tseem siv dav hauv kev npaj cov khoom siv ceramic glazes. Nws tuaj yeem txhim kho cov khoom rheological ntawm cov glaze, ua rau nws yooj yim dua los tswj thiab siv sib npaug thaum lub sijhawm txheej txheem glazing. Tshwj xeeb, HPMC tuaj yeem ua rau cov glaze faib ntau dua ntawm qhov chaw ntawm lub cev thaum lub sijhawm txheej, zam kev tsis sib npaug lossis sagging los ntawm kev ua kua ntau dhau ntawm cov glaze. Tom qab glazing, HPMC kuj tseem tuaj yeem tiv thaiv kev tawg thaum lub sijhawm ziab ntawm cov glaze, kom ntseeg tau tias qhov chaw glaze tiaj tus thiab du.
4. Txhim kho lub zog sib txuas ntawm lub cev thiab txheej glaze
Hauv kev tsim cov khoom siv ceramic, lub zog sib txuas ntawm lub cev thiab txheej glaze yog qhov tseem ceeb rau qhov zoo ntawm cov khoom kawg. HPMC tuaj yeem txhim kho qhov kev sib txuas ntawm lub cev ntsuab thiab txheej glaze los ntawm nws cov khoom nplaum thiab cov khoom tsim zaj duab xis. Cov zaj duab xis nyias uas nws tsim rau ntawm qhov chaw ntawm lub cev tsis yog tsuas yog pab kom txheej cov glaze sib npaug xwb, tab sis kuj ua kom muaj zog ntawm kev sib xyaw ua ke ntawm lub cev thiab txheej glaze, txhim kho qhov ruaj khov thiab kev zoo nkauj ntawm cov khoom tiav.
5. Txhim kho kev ua haujlwm zoo dua
HPMC kuj tseem tuaj yeem txhim kho kev ua haujlwm ntawm tag nrho cov khoom los ntawm kev ua kom zoo dua cov txheej txheem hauv kev tsim cov khoom siv ceramic. Vim nws cov khoom zoo heev uas ua rau tuab thiab sib txuas, HPMC tuaj yeem txo qhov xav tau dej ntawm cov khoom siv ceramic slurries, yog li ua rau lub sijhawm ziab luv dua thiab txhim kho kev ua haujlwm ziab. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem txhim kho cov khoom rheological hauv cov txheej txheem ziab tshuaj tsuag, txo cov agglomeration thaum lub sijhawm ziab tshuaj tsuag, thiab txhim kho cov kua dej ntawm cov hmoov, yog li ua kom nrawm dua qhov ceev molding thiab txo cov nqi tsim khoom.
6. Txhim kho cov khoom siv kho tshuab ntawm cov khoom
Cov khoom siv kho tshuab ntawm cov khoom siv ceramic, xws li lub zog flexural thiab hardness, cuam tshuam ncaj qha rau lawv lub neej kev pabcuam thiab ntau yam kev siv. Kev siv HPMC hauv kev tsim khoom ceramic tuaj yeem txhim kho cov khoom siv kho tshuab no. HPMC tsis yog tsuas yog txo qhov tshwm sim ntawm kev ntxhov siab sab hauv thiab tawg los ntawm kev txhim kho cov txheej txheem ziab ntawm lub cev, tab sis kuj txhim kho lub zog tag nrho thiab kev hnav tsis kam ntawm cov khoom siv ceramic los ntawm kev txhim kho qhov nplaum ntawm cov txheej glaze thiab tiv thaiv cov glaze los ntawm tev tawm.
7. Kev tiv thaiv ib puag ncig thiab kev ruaj khov
HPMC yog cov khoom siv polymer uas tsis muaj tshuaj lom thiab tsis ua rau muaj kev phom sij uas ua tau raws li cov kev cai tiv thaiv ib puag ncig niaj hnub no. Kev siv HPMC hauv kev tsim cov khoom siv ceramic pab txo kev siv cov tshuaj lom neeg thiab txo cov pa phem thaum lub sijhawm tsim khoom. Tib lub sijhawm, HPMC tuaj yeem txo qhov seem thiab txhim kho kev siv cov khoom siv raw thaum lub sijhawm thov, pab ua tiav kev tsim khoom ntsuab thiab kev txhim kho kom ruaj khov.
8. Txhim kho cov xim thiab cov teebmeem ntawm qhov chaw
HPMC kuj tseem muaj txiaj ntsig zoo rau cov xim thiab qhov chaw ntawm cov khoom siv ceramic glazes. Vim tias HPMC muaj cov dej khaws cia zoo, nws tuaj yeem tswj tau qhov sib xws ntawm cov khoom siv thaum lub sijhawm hlawv, yog li ua kom cov xim ci thiab sib xws ntawm cov txheej glaze. Tsis tas li ntawd, HPMC tuaj yeem pab txo qhov tsim ntawm cov npuas, ua rau cov khoom siv ceramic du thiab mos dua, thiab txhim kho qhov zoo nkauj ntawm cov khoom siv ceramic.
HPMC muaj ntau qhov zoo hauv kev tsim cov khoom siv ceramic. Nws tsis tsuas yog txhim kho kev ua haujlwm ntawm kev ua kom lub cev ntsuab thiab ziab, tab sis kuj txhim kho cov nyhuv ntawm cov glaze thiab cov khoom siv kho tshuab ntawm cov khoom tiav. Nws kuj yog tus phooj ywg ib puag ncig thiab ruaj khov. Nrog rau kev txhim kho tas mus li ntawm cov thev naus laus zis tsim khoom siv ceramic, HPMC cov kev cia siab ntawm daim ntawv thov kuj yuav dav dua, thiab nws yuav txuas ntxiv ua lub luag haujlwm tseem ceeb hauv kev txhim kho qhov zoo ntawm cov khoom siv ceramic, ua kom zoo dua cov txheej txheem tsim khoom, thiab txhawb kev txhim kho kev lag luam ruaj khov.
Lub sijhawm tshaj tawm: Cuaj hlis-03-2024