Ua kom muaj kev ruaj ntseg ntawm Carboxymethyl Cellulose (CMC) glaze slurry yog qhov tseem ceeb rau kev ua kom zoo thiab ua haujlwm zoo hauv cov khoom siv ceramic. Kev ruaj ntseg nyob rau hauv cov ntsiab lus no txhais tau hais tias tuav ib tug niaj hnub ncua kev kawm ntawv yam tsis muaj qhov hais los yog agglomerating nyob rau hauv lub sij hawm, uas yuav ua rau muaj teeb meem nyob rau hauv cov khoom kawg.
Nkag siab CMC thiab Nws Lub Luag Haujlwm hauv Glaze Slurry
Carboxymethyl Cellulose (CMC) yog dej-soluble polymer muab tau los ntawm cellulose. Nws yog feem ntau siv nyob rau hauv ceramic glazes raws li ib tug binder thiab rheology modifier. CMC txhim kho cov glaze viscosity, pab tswj kom muaj kev ncua ntev ntawm cov khoom. Nws kuj tseem txhim kho cov glaze qhov adhesion rau ntawm ceramic nto thiab txo qhov tsis xws luag xws li pinholes thiab nkag.
Yam tseem ceeb cuam tshuam rau CMC Glaze Slurry Stability
CMC Quality thiab Concentration:
Purity: High-purity CMC yuav tsum tau siv kom tsis txhob muaj impurities uas tuaj yeem ua rau cov slurry tsis ruaj khov.
Degree ntawm Kev Hloov Kho (DS): DS ntawm CMC, uas qhia qhov nruab nrab ntawm cov carboxymethyl pawg txuas nrog cov pob txha cellulose, cuam tshuam rau nws cov solubility thiab kev ua haujlwm. A DS ntawm 0.7 thiab 1.2 feem ntau haum rau cov ntawv thov ceramic.
Molecular Luj: Siab dua molecular hnyav CMC muab viscosity zoo dua thiab raug tshem tawm cov khoom, tab sis nws tuaj yeem nyuaj rau yaj. Ntsuas qhov hnyav molecular thiab yooj yim ntawm kev tuav yog qhov tseem ceeb.
Dej Zoo:
pH: Cov pH ntawm cov dej uas siv los npaj cov slurry yuav tsum tsis txhob nruab nrab rau me ntsis alkaline (pH 7-8). Cov dej acidic lossis alkaline heev tuaj yeem cuam tshuam rau CMC kev ruaj ntseg thiab kev ua haujlwm.
Cov ntsiab lus ionic: Cov qib siab ntawm cov ntsev yaj thiab ions tuaj yeem cuam tshuam nrog CMC thiab cuam tshuam rau nws cov khoom thickening. Kev siv dej deionized lossis softened dej feem ntau pom zoo.
Txoj Kev Npaj:
Dissolution: CMC yuav tsum tau yaj hauv dej kom zoo ua ntej ntxiv lwm yam khoom. Kev sib ntxiv qeeb nrog lub zog nplawm tuaj yeem tiv thaiv pob tsim.
Mixing Order: Ntxiv cov tshuaj CMC rau cov khoom ua ntej sib xyaw glaze los yog rov qab tuaj yeem cuam tshuam rau homogeneity thiab stability. Feem ntau, dissolving CMC ua ntej thiab tom qab ntawd ntxiv cov ntaub ntawv glaze tau txais txiaj ntsig zoo dua.
Kev laus: Tso cai rau CMC tshuaj rau hnub nyoog li ob peb teev ua ntej siv tuaj yeem txhim kho nws qhov kev ua tau zoo los ntawm kev ua kom tiav cov dej thiab kev sib cais.
Additives thiab lawv cov kev sib cuam tshuam:
Deflocculants: Ntxiv me me ntawm cov deflocculants xws li sodium silicate los yog sodium carbonate tuaj yeem pab ua kom cov khoom sib npaug. Txawm li cas los xij, kev siv ntau dhau tuaj yeem ua rau over-deflocculation thiab destabilize lub slurry.
Preservatives: Txhawm rau tiv thaiv kev loj hlob ntawm microbial, uas tuaj yeem degrade CMC, cov tshuaj tua kab mob zoo li biocides yuav tsim nyog, tshwj xeeb tshaj yog tias cov slurry khaws cia rau lub sijhawm ntev.
Lwm cov Polymers: Qee zaum, lwm cov polymers lossis cov thickeners yog siv nrog CMC los kho cov rheology thiab stability ntawm glaze slurry.
Cov kauj ruam tswv yim rau Stabilizing CMC Glaze Slurry
Optimizing CMC Concentration:
Txiav txim siab qhov kev pom zoo ntawm CMC rau koj qhov tshwj xeeb glaze formulation los ntawm kev sim. Feem ntau cov concentrations ntawm 0.2% mus rau 1.0% los ntawm qhov hnyav ntawm cov glaze qhuav.
Maj mam kho qhov CMC concentration thiab soj ntsuam cov viscosity thiab ncua kev kawm ntawv kom pom qhov zoo tshaj plaws tshuav nyiaj li cas.
Kom ntseeg tau tias homogeneous Mixing:
Siv high-shear mixers los yog pob zeb los xyuas kom meej sib xyaw ntawm CMC thiab glaze Cheebtsam.
Txheeb xyuas cov slurry ib ntus kom tsis tu ncua thiab kho qhov sib xyaw ua ke raws li xav tau.
Tswj pH:
Tsis tu ncua saib xyuas thiab kho cov pH ntawm slurry. Yog tias pH drifts tawm ntawm qhov xav tau, siv cov buffers tsim nyog kom muaj kev ruaj ntseg.
Tsis txhob ntxiv cov khoom siv acidic lossis alkaline ncaj qha rau hauv slurry yam tsis muaj kev cuam tshuam zoo.
Saib xyuas thiab kho viscosity:
Siv viscometers tsis tu ncua xyuas cov viscosity ntawm slurry. Khaws ib daim ntawv teev cov viscosity nyeem los txheeb xyuas cov xwm txheej thiab cov teeb meem kev ruaj ntseg.
Yog tias qhov viscosity hloov lub sijhawm, kho los ntawm kev ntxiv me me ntawm cov dej los yog CMC tov raws li xav tau.
Cia thiab tuav:
Khaws cov slurry hauv cov thawv ntim, huv si kom tsis txhob muaj kab mob thiab evaporation.
Tsis tu ncua do cov slurry khaws cia kom muaj kev ncua. Siv cov tshuab stirrers yog tias tsim nyog.
Tsis txhob cia lub sijhawm ntev ntawm qhov kub thiab txias los yog nyob rau hauv tshav ntuj ncaj qha, uas tuaj yeem degrade CMC.
Troubleshooting Common Issues
Kev daws teeb meem:
Yog hais tias cov khoom ua kom sai sai, xyuas qhov CMC concentration thiab xyuas kom meej tias nws muaj dej txaus.
Xav txog kev ntxiv me me ntawm deflocculant los txhim kho particle suspension.
Gelation:
Yog tias cov gels slurry, nws yuav qhia tau tias dhau-flocculation lossis CMC ntau dhau. Kho qhov concentration thiab xyuas cov ntsiab lus ionic ntawm cov dej.
Xyuas kom meej qhov kev txiav txim ntawm qhov sib ntxiv thiab kev sib xyaw ua ke.
Ua npuas ncauj:
Ua npuas ncauj tuaj yeem yog qhov teeb meem thaum sib tov. Siv cov tshuaj antifoaming sparingly los tswj ua npuas ncauj yam tsis muaj kev cuam tshuam cov khoom glaze.
Kev loj hlob microbial:
Yog tias cov slurry tsim cov ntxhiab tsw los yog hloov qhov sib xws, nws yuav yog vim muaj cov kab mob microbial. Ntxiv cov biocides thiab xyuas kom cov ntim thiab cov khoom huv si.
Ua kom muaj kev ruaj ntseg ntawm CMC glaze slurry muaj kev sib xyaw ua ke ntawm kev xaiv cov ntaub ntawv raug, tswj cov txheej txheem kev npaj, thiab tswj kom zoo cia thiab tuav cov kev coj ua. Los ntawm kev nkag siab txog lub luag haujlwm ntawm txhua qhov kev tivthaiv thiab saib xyuas qhov tseem ceeb xws li pH, viscosity, thiab particle ncua kev kawm ntawv, koj tuaj yeem tsim qhov ruaj khov thiab zoo glaze slurry. Kev daws teeb meem tsis tu ncua thiab kev hloov kho raws li kev pom zoo yuav pab tswj kev sib xws thiab zoo hauv cov khoom siv ceramic.
Post lub sij hawm: Jun-04-2024