Lub hauv paus ntawm cov vuas glazed yog glaze, uas yog ib txheej ntawm daim tawv nqaij ntawm cov vuas, uas muaj cov nyhuv ntawm tig pob zeb rau hauv kub, muab ceramic craftsmen muaj peev xwm ua tiag tiag cov qauv ntawm qhov chaw.Hauv kev tsim cov vuas glazed, ruaj khov glaze slurry txheej txheem kev ua tau zoo yuav tsum tau ua raws, thiaj li ua tiav cov txiaj ntsig siab thiab zoo.Cov cim tseem ceeb ntawm nws cov txheej txheem kev ua tau zoo suav nrog viscosity, fluidity, dispersion, ncua kev kawm ntawv, lub cev-glaze bonding thiab smoothness.Hauv kev tsim khoom tiag tiag, peb ua tau raws li peb cov kev xav tau los ntawm kev kho cov mis ntawm cov khoom siv ceramic thiab ntxiv cov tshuaj auxiliary agents, qhov tseem ceeb tshaj plaws yog: CMC carboxymethyl cellulose thiab av nplaum los kho viscosity, dej sau ceev thiab fluidity, ntawm cov CMC kuj muaj. ib tug decondensing nyhuv.Sodium tripolyphosphate thiab kua degumming tus neeg saib xyuas PC67 muaj lub luag haujlwm ntawm dispersing thiab decondensing, thiab cov preservative yog tua cov kab mob thiab cov kab mob los tiv thaiv methyl cellulose.Thaum lub sij hawm ntev cia ntawm glaze slurry, ions nyob rau hauv glaze slurry thiab dej los yog methyl daim ntawv insoluble tshuaj thiab thixotropy, thiab methyl pawg nyob rau hauv lub glaze slurry tsis ua hauj lwm thiab cov txaus tus nqi txo.Kab lus no feem ntau tham txog yuav ua li cas kom ntev lub methyl Lub sij hawm zoo kom ruaj khov kev ua haujlwm ntawm cov txheej txheem glaze slurry feem ntau cuam tshuam los ntawm methyl CMC, cov dej nkag mus rau hauv lub pob, tus nqi ntawm cov kaolin ntxuav hauv cov mis, cov txheej txheem ua, thiab staleness.
1. Cov nyhuv ntawm methyl pawg (CMC) ntawm cov khoom ntawm glaze slurry
Carboxymethyl cellulose CMCyog polyanionic compound nrog cov dej zoo solubility tau tom qab tshuaj hloov kho ntawm ntuj fibers (alkali cellulose thiab etherification tus neeg saib xyuas chloroacetic acid), thiab nws kuj yog ib tug organic polymer.Feem ntau siv nws cov khoom ntawm kev sib txuas, dej tuav, tshem tawm dispersion, thiab decondensation kom lub glaze nto du thiab ntom.Muaj cov kev cai sib txawv rau cov viscosity ntawm CMC, thiab nws muab faib ua siab, nruab nrab, qis, thiab ultra-low viscosities.High thiab low-viscosity methyl pawg yog ua tiav los ntawm kev tswj cov degradation ntawm cellulose - uas yog, kev rhuav tshem ntawm cellulose molecular chains.Cov nyhuv tseem ceeb tshaj plaws yog tshwm sim los ntawm cov pa oxygen hauv huab cua.Cov tshuaj tiv thaiv tseem ceeb rau kev npaj siab-viscosity CMC yog oxygen barrier, nitrogen flushing, txias thiab khov, ntxiv tus neeg sawv cev sib txuas thiab dispersant.Raws li kev soj ntsuam ntawm Scheme 1, Scheme 2, thiab Scheme 3, nws tuaj yeem pom tias txawm hais tias qhov viscosity ntawm cov viscosity methyl pawg tsawg tsawg dua li ntawm cov viscosity methyl pawg, qhov kev ua haujlwm ruaj khov ntawm glaze slurry yog. zoo dua li ntawm high-viscosity methyl pawg.Nyob rau hauv cov nqe lus ntawm lub xeev, cov low-viscosity methyl pawg yog oxidized ntau tshaj li high-viscosity methyl pawg thiab muaj ib tug luv luv molecular saw.Raws li lub tswv yim ntawm entropy nce, nws yog ib lub xeev ruaj khov dua li cov high-viscosity methyl pawg.Yog li ntawd, txhawm rau ua raws li kev ruaj ntseg ntawm cov mis, koj tuaj yeem sim ua kom cov viscosity tsawg methyl pawg, thiab tom qab ntawd siv ob CMCs kom ruaj khov tus nqi ntws, tsis txhob muaj qhov hloov pauv loj hauv kev tsim khoom vim qhov tsis ruaj khov ntawm ib qho CMC.
2. Cov nyhuv ntawm cov dej nkag mus rau lub pob ntawm kev ua haujlwm ntawm glaze slurry
Cov dej hauv cov mis glaze txawv vim muaj cov txheej txheem sib txawv.Raws li qhov ntau ntawm 38-45 grams dej ntxiv rau 100 grams ntawm cov khoom qhuav, cov dej tuaj yeem lubricate cov slurry hais thiab pab kev sib tsoo, thiab tseem tuaj yeem txo cov thixotropy ntawm glaze slurry.Tom qab soj ntsuam Scheme 3 thiab Scheme 9, peb tuaj yeem pom tias txawm hais tias qhov ceev ntawm methyl pab pawg tsis ua haujlwm yuav tsis cuam tshuam los ntawm cov dej, qhov dej tsawg dua yooj yim dua khaws cia thiab tsis tshua muaj nag lossis daus thaum siv thiab khaws cia.Yog li ntawd, hauv peb qhov kev tsim khoom tiag tiag, tus nqi ntws tuaj yeem tswj tau los ntawm kev txo cov dej nkag mus rau hauv pob.Rau cov txheej txheem tshuaj tsuag glaze, lub ntiajteb txawj nqus tshwj xeeb thiab cov khoom siv siab txaus tuaj yeem siv tau, tab sis thaum ntsib cov tshuaj tsuag glaze, peb yuav tsum tau nce cov methyl thiab dej kom tsim nyog.Lub viscosity ntawm glaze yog siv los xyuas kom meej tias cov glaze nto yog du yam tsis muaj hmoov tom qab txau cov glaze.
3. Cov nyhuv ntawm Kaolin Cov ntsiab lus ntawm Glaze Slurry Properties
Kaolin yog ib hom ntxhia.Nws lub ntsiab Cheebtsam yog kaolinite minerals thiab ib tug me me ntawm montmorillonite, mica, chlorite, feldspar, thiab lwm yam. Nws yog feem ntau siv raws li ib tug inorganic suspending tus neeg saib xyuas thiab cov kev taw qhia ntawm alumina nyob rau hauv glazes.Nyob ntawm cov txheej txheem glazing, nws fluctuates ntawm 7-15%.Los ntawm kev sib piv cov tswv yim 3 nrog cov tswv yim 4, peb tuaj yeem pom tias nrog kev nce ntawm cov ntsiab lus kaolin, qhov ntws ntawm glaze slurry nce thiab nws tsis yooj yim los daws.Qhov no yog vim lub viscosity muaj feem xyuam rau cov ntxhia muaj pes tsawg leeg, particle loj thiab cation hom hauv av nkos.Feem ntau hais lus, cov ntsiab lus montmorillonite ntau dua, qhov zoo dua cov khoom, qhov siab dua qhov viscosity, thiab nws yuav tsis poob vim cov kab mob yaig, yog li nws tsis yooj yim los hloov lub sijhawm.Yog li ntawd, rau glazes uas yuav tsum tau khaws cia rau lub sij hawm ntev, peb yuav tsum tau nce cov ntsiab lus ntawm kaolin.
4. Cov nyhuv ntawm lub sijhawm milling
Cov txheej txheem crushing ntawm pob zeb yuav ua rau kev puas tsuaj, cua sov, hydrolysis thiab lwm yam kev puas tsuaj rau CMC.Los ntawm kev sib piv ntawm scheme 3, scheme 5 thiab scheme 7, peb tuaj yeem tau txais qhov ntawd txawm hais tias qhov pib viscosity ntawm scheme 5 yog qhov tsawg vim qhov kev puas tsuaj loj rau pawg methyl vim lub sijhawm ntev ntawm lub pob milling, qhov fineness yog txo vim cov khoom siv. xws li kaolin thiab talc (lub finer lub fineness, lub zog ionic quab yuam, siab dua viscosity) yog yooj yim rau khaws cia rau lub sij hawm ntev thiab tsis yooj yim rau precipitate.Txawm hais tias cov tshuaj ntxiv ntxiv rau lub sijhawm kawg hauv txoj kev npaj 7, txawm hais tias qhov viscosity nce loj dua, qhov tsis ua haujlwm kuj tseem nrawm dua.Qhov no yog vim qhov ntev ntawm cov saw hlau molecular, nws yooj yim dua kom tau txais methyl pawg Oxygen poob nws qhov kev ua tau zoo.Tsis tas li ntawd, vim hais tias lub pob milling efficiency tsawg vim nws tsis ntxiv ua ntej lub trimerization, lub fineness ntawm slurry yog siab thiab lub zog ntawm cov kaolin hais tsis muaj zog, yog li cov glaze slurry settles sai dua.
5. Cov nyhuv ntawm preservatives
Los ntawm kev sib piv kev sim 3 nrog kev sim 6, cov glaze slurry ntxiv nrog cov tshuaj tua kab mob tuaj yeem tswj tau qhov viscosity yam tsis muaj kev txo qis rau lub sijhawm ntev.Qhov no yog vim hais tias lub ntsiab raw khoom ntawm CMC yog refined paj rwb, uas yog ib tug organic polymer compound, thiab nws cov glycosidic daim ntawv cog lus cov qauv kuj muaj zog nyob rau hauv qhov kev txiav txim ntawm lom enzymes yooj yim rau hydrolyze, macromolecular saw ntawm CMC yuav irreversibly tawg los ua cov piam thaj. molecules ib tug los ntawm ib tug.Muab lub zog rau cov kab mob microorganisms thiab tso cai rau cov kab mob rov ua dua sai dua.CMC tuaj yeem siv los ua lub zog ncua kev kawm raws li nws qhov hnyav molecular, yog li tom qab nws biodegraded, nws thawj lub cev thickening nyhuv kuj ploj mus.Lub mechanism ntawm kev txiav txim ntawm preservatives los tswj kev ciaj sia ntawm microorganisms yog mas tshwm sim nyob rau hauv nam ntawm inactivation.Ua ntej, nws cuam tshuam nrog cov enzymes ntawm cov kab mob, rhuav tshem lawv cov metabolism hauv ib txwm, thiab inhibits cov haujlwm ntawm cov enzymes;thib ob, nws coagulates thiab denatures microbial proteins, cuam tshuam nrog lawv cov ciaj sia taus thiab kev loj hlob;Thib peb, qhov permeability ntawm cov plasma membrane inhibits kev tshem tawm thiab cov metabolism hauv cov enzymes hauv lub cev, ua rau inactivation thiab hloov pauv.Nyob rau hauv tus txheej txheem ntawm kev siv preservatives, peb yuav pom tias cov nyhuv yuav tsis muaj zog thaum lub sij hawm.Ntxiv nrog rau qhov cuam tshuam ntawm cov khoom zoo, peb kuj yuav tsum xav txog qhov laj thawj yog vim li cas cov kab mob tau tsim kev tiv thaiv rau cov khoom noj khoom haus ntev ntev los ntawm kev yug me nyuam thiab kev tshuaj ntsuam xyuas., yog li hauv cov txheej txheem tsim khoom tiag tiag peb yuav tsum hloov ntau hom tshuaj tua kab mob rau lub sijhawm.
6. Kev cuam tshuam ntawm kev kaw cia ntawm glaze slurry
Muaj ob qhov chaw tseem ceeb ntawm CMC tsis ua haujlwm.Ib qho yog oxidation los ntawm kev sib cuag nrog huab cua, thiab lwm yam yog cov kab mob yaig los ntawm kev raug.Lub fluidity thiab ncua ntawm cov mis nyuj thiab dej haus uas peb tuaj yeem pom hauv peb lub neej kuj tseem ruaj khov los ntawm trimerization thiab CMC.Lawv feem ntau muaj txee lub neej txog li 1 xyoos, thiab qhov phem tshaj yog 3-6 lub hlis.Lub ntsiab yog vim li cas yog kev siv inactivation Sterilization thiab kaw cia technology, nws yog envisaged tias glaze yuav tsum tau muab kaw thiab khaws cia.Los ntawm kev sib piv ntawm Scheme 8 thiab Scheme 9, peb tuaj yeem pom tias cov glaze khaws cia hauv airtight cia tuaj yeem ua haujlwm ruaj khov rau lub sijhawm ntev dua yam tsis muaj nag lossis daus.Txawm hais tias qhov ntsuas tau ua rau raug huab cua, nws tsis ua raws li qhov kev cia siab, tab sis nws tseem muaj lub sijhawm khaws cia ntev heev.Qhov no yog vim hais tias los ntawm Lub glaze khaws cia nyob rau hauv lub hnab ntim khoom cais tawm qhov yaig ntawm huab cua thiab cov kab mob thiab ua rau lub neej ntev ntawm cov methyl.
7. Qhov cuam tshuam ntawm staleness ntawm CMC
Staleness yog txheej txheem tseem ceeb hauv kev tsim glaze.Nws lub luag haujlwm tseem ceeb yog ua kom nws muaj pes tsawg leeg zoo ib yam, tshem tawm cov roj ntau dhau thiab decompose qee cov organic teeb meem, kom lub ntsej muag glaze smoother thaum siv tsis muaj pinholes, concave glaze thiab lwm yam tsis xws luag.CMC polymer fibers raug puas tsuaj thaum lub sij hawm lub pob milling txheej txheem yog reconnected thiab tus nqi ntws yog nce.Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau stale rau ib lub sij hawm ntawm lub sij hawm, tab sis mus ntev staleness yuav ua rau microbial reproduction thiab CMC tsis ua hauj lwm, uas ua rau ib tug txo nyob rau hauv tus nqi ntws thiab nce nyob rau hauv roj, yog li ntawd peb yuav tsum nrhiav kom tau ib tug tshuav nyiaj li cas. ntawm lub sijhawm, feem ntau 48-72 teev, thiab lwm yam. Nws yog qhov zoo dua los siv glaze slurry .Nyob rau hauv qhov tseeb zus tau tej cov Hoobkas, vim hais tias kev siv ntawm glaze yog tsawg, lub stirring hniav yog tswj los ntawm lub computer, thiab preservation ntawm glaze yog ncua rau 30 feeb.Lub hauv paus ntsiab lus tseem ceeb yog kom tsis muaj zog ntawm hydrolysis tshwm sim los ntawm CMC nplawm thiab cua sov thiab qhov kub thiab txias nce Microorganisms multiply, yog li prolonging cov muaj methyl pawg.
Post lub sij hawm: Jan-04-2023