CMC siv hauv Ceramic Industry

Sodium carboxymethyl cellulose, lus Askiv abbreviation CMC, ceramic kev lag luam feem ntau hu ua "Sodium CMC", yog ib hom tshuaj anionic, yog ua los ntawm ntuj cellulose li raw khoom, los ntawm kev hloov tshuaj thiab hmoov dawb los yog lub teeb daj.CMC muaj solubility zoo thiab tuaj yeem yaj mus rau hauv pob tshab thiab cov kua dej sib xws hauv dej txias thiab kub.

1. Kev qhia luv luv ntawm CMCsiv hauv ceramics

1.1 daim ntawv thov ntawm CMC hauv ceramics

1.1.1.Txoj cai thov

CMC muaj cov qauv linear polymer tshwj xeeb.Thaum CMC ntxiv rau dej, nws pawg hydrophilic (-Coona) tau ua ke nrog dej los tsim cov txheej txheem solvated, uas maj mam disperses CMC molecules hauv dej.Lub network qauv ntawm CMC polymers yog tsim los ntawm hydrogen daim ntawv cog lus thiab van der Waals quab yuam, yog li qhia cohesivity.CMC lub cev tshwj xeeb tuaj yeem siv los ua cov khoom siv ntxiv, cov yas yas thiab cov khoom siv hluav taws xob ntawm cov pob zeb hauv kev lag luam ceramic.Ntxiv cov nqi ntawm CMC rau lub billet tuaj yeem ua rau muaj kev sib koom ua ke ntawm cov billet, ua kom cov billet yooj yim rau kev tsim, nce lub zog flexural los ntawm 2 ~ 3 zaug, thiab txhim kho kev ruaj ntseg ntawm cov billet, txhawm rau txhim kho tus nqi zoo. ceramics, txo tus nqi ntawm kev ua tom qab.Nyob rau tib lub sijhawm, vim yog qhov sib ntxiv ntawm CMC, kev ua haujlwm ceev ntawm cov pob zeb ntsuab tuaj yeem txhim kho thiab kev siv hluav taws xob ntau tuaj yeem txo qis, thiab cov dej hauv cov billet tuaj yeem sib npaug evaporated los tiv thaiv kom qhuav thiab tawg, tshwj xeeb tshaj yog nyob rau hauv qhov loj. ntawm pem teb pobzeb billet thiab polished cib billet, cov nyhuv yog pom tseeb dua.Piv nrog rau lwm cov khoom siv lub cev muaj zog, CMC lub cev tshwj xeeb muaj cov yam ntxwv hauv qab no:

(1) tsawg npaum li cas: qhov ntau npaum li cas feem ntau tsawg dua 0.1%, uas yog 1/5 ~ 1/3 ntawm lwm lub cev ntxiv dag zog rau tus neeg sawv cev, thaum lub zog khoov ntawm lub cev ntsuab yog pom tseeb thiab tus nqi yuav raug txo.

(2) zoo hlawv poob: tom qab hlawv yuav luag tsis muaj tshauv, tsis muaj residue, tsis cuam tshuam cov xim ntsuab.

(3) nrog kev ncua zoo: txhawm rau tiv thaiv cov khoom siv tsis zoo thiab cov dej nag, kom cov slurry sib npaug dispersed.

(4) Hnav tsis kam: nyob rau hauv cov txheej txheem sib tsoo pob, cov saw hlau molecular tsis tshua puas.

1.1.2.Txoj kev ntxiv

Feem ntau ntawm CMC nyob rau hauv lub billet yog 0.03 ~ 0.3%, uas tuaj yeem hloov kho raws li qhov xav tau tiag tiag.Rau cov slurry nrog ntau cov ntaub ntawv tsis zoo hauv cov mis, CMC tuaj yeem muab ntxiv rau lub pob zeb thiab hauv av ua ke nrog cov av nkos, ua tib zoo saib xyuas cov khoom sib txawv, kom tsis txhob nyuaj rau yaj tom qab agglomeration, lossis CMC tuaj yeem yuav predissolved nrog dej ntawm 1:30 cais thiab ntxiv rau lub pob zeb rau kev sib tov 1 ~ 5 teev ua ntej sib tsoo.

1.2.Kev siv CMC hauv glaze slurry

1.2.1 Txoj cai ntawm kev thov

Glaze paste tshwj xeeb HOM CMC yog qhov ua tau zoo tshaj plaws stabilizer thiab binder, siv rau ceramic pobzeb hauv qab glaze thiab nto glaze, tuaj yeem ua rau lub zog sib txuas ntawm glaze slurry thiab lub cev, vim glaze slurry yog ib qho yooj yim los nag thiab tsis ruaj khov, thiab CMC thiab txhua yam. glaze compatibility yog zoo, muaj zoo heev dispersion thiab tiv thaiv colloid, yog li ntawd lub glaze lub cev nyob rau hauv ib tug ruaj khov dispersion xeev.Tom qab ntxiv CMC, qhov nro ntawm glaze tuaj yeem txhim kho, cov dej tuaj yeem tiv thaiv kom tsis txhob muaj qhov sib txawv ntawm glaze rau lub cev, qhov smoothness ntawm glaze tuaj yeem nce ntxiv, tawg thiab tawg tshwm sim tshwm sim los ntawm kev poob ntawm lub zog ntawm lub cev tom qab. Daim ntawv thov glaze tuaj yeem zam tau, thiab qhov tshwm sim pinhole ntawm glaze kuj tuaj yeem txo qis tom qab ci.

1.2.2.Ntxiv txoj kev

Tus nqi ntawm CMC ntxiv rau hauv qab glaze thiab nto glaze li ntawm 0.08 mus rau 0.30%.Nws tuaj yeem hloov kho raws li qhov xav tau tiag tiag.Ua ntej, CMC tau npaj rau hauv 3% aqueous tov.Yog tias nws yuav tsum tau muab khaws cia rau ob peb hnub, cov tshuaj yuav tsum tau muab tso rau hauv lub thawv airtight nrog cov khoom tsim nyog thiab khaws cia ntawm qhov kub thiab txias.Tom qab ntawd, cov tshuaj yog tov tusyees nrog glaze.

1.3 daim ntawv thov ntawm CMC hauv kev luam ntawv glaze

1.3.1, luam ntawv glaze tshwj xeeb CMC muaj cov khoom zoo thickening thiab dispersity thiab stability, tshwj xeeb CMC los txais yuav tshiab technology, zoo solubility, siab transparency, yuav luag tsis muaj insolubles, tab sis kuj muaj superior shear thinning thiab lubrication, zoo heev txhim kho cov luam ntawv glaze printing. adaptability, txo qhov screen, screen thaiv qhov tshwm sim, txo lub sij hawm network, thaum luam ntawv du, ntshiab qauv, zoo xim sib xws.

1.3.2 Feem ntau ntawm kev ntxiv luam ntawv glaze yog 1.5-3%.CMC tuaj yeem tsau nrog ethylene glycol thiab tom qab ntawd ntxiv nrog dej kom nws ua tau zoo, lossis 1-5% sodium tripolyphosphate thiab cov ntaub ntawv xim tuaj yeem qhuav sib xyaw ua ke, thiab tom qab ntawd yaj nrog dej, kom ntau yam ntaub ntawv tuaj yeem yaj tag nrho thiab sib npaug.

1.4.Kev siv CMC hauv infiltration glaze

1.4.1 Txoj cai ntawm kev thov

Penetration glaze muaj ntau cov ntsev, kua qaub, thiab qee qhov kev nkag mus rau glaze tshwj xeeb CMC muaj cov kua qaub ntsev tiv thaiv kev ruaj ntseg, ua rau kev nkag mus rau glaze hauv cov txheej txheem ntawm kev siv thiab kev tso kawm kom ruaj khov viscosity, tiv thaiv vim qhov kev hloov ntawm viscosity, xim thiab penetration glaze tshwj xeeb CMC dej soluble, net permeability thiab dej tuav yog zoo heev, kom muaj kev ruaj ntseg ntawm soluble ntsev glaze muaj kev pab ntau.

1.4.2.Txoj kev ntxiv

Dissolve CMC nrog ethylene glycol, ib co dej thiab complexing neeg sawv cev, ces sib tov zoo nrog cov yaj xim tov.

2.CMC yuav tsum tau them nyiaj rau hauv cov khoom siv ceramic

2.1 Ntau hom CMC ua lub luag haujlwm sib txawv hauv cov khoom siv ceramic.Kev xaiv kom zoo tuaj yeem ua tiav lub hom phiaj ntawm kev lag luam thiab kev ua haujlwm zoo.

2.2.Nyob rau hauv lub glaze thiab luam ntawv glaze, nws tsis yog yuav tsum tau coopt CMC cov khoom uas tsis muaj purity, tshwj xeeb tshaj yog nyob rau hauv lub printing glaze, siab purity CMC nrog siab purity, zoo acid thiab ntsev kuj thiab siab transparency yuav tsum tau xaiv los tiv thaiv ripples thiab pinholes ntawm lub glaze.Nyob rau tib lub sijhawm, tseem tuaj yeem tiv thaiv kev siv cov ntsaws net, tsis zoo leveling thiab xim thiab lwm yam tshwm sim.

2.3 Yog hais tias qhov kub thiab txias los yog glaze yuav tsum tau muab tso rau lub sij hawm ntev, preservatives yuav tsum tau ntxiv.

3. Kev tshuaj xyuas cov teeb meem tshwm sim ntawm CMC hauv cov khoom siv ceramic

3.1.Lub fluidity ntawm av nkos tsis zoo thiab nws nyuaj rau muab cov kua nplaum.

Vim lub viscosity ntawm CMC nws tus kheej, av nkos viscosity siab dhau lawm, uas ua rau muaj teeb meem ntawm pulping.Txoj kev daws teeb meem yog los kho tus nqi thiab hom coagulant, pom zoo cov mis decoagulant hauv qab no1) sodium tripolyphosphate 0.3%;(2) sodium tripolyphosphate 0.1% + sodium silicate 0.3%;(3) Sodium humate 0.2% + sodium tripolyphosphate 0.1%

3.2.Glaze muab tshuaj txhuam thiab luam ntawv roj yog nyias.

Yog vim li cas rau xaiv glaze muab tshuaj txhuam thiab luam ntawv roj yog raws li nram no1) glaze paste lossis luam ntawv roj yog eroded los ntawm cov kab mob, yog li ntawd CMC ua tsis tiav.Cov tshuaj yog ntxuav lub thawv ntawm glaze paste los yog luam ntawv roj kom huv si, los yog ntxiv preservatives xws li formaldehyde thiab phenol.(2) Nyob rau hauv lub nruam stirring ntawm shear quab yuam, lub viscosity txo.Nws raug pom zoo kom kho CMC aqueous tov.

3.3.Muab tshuaj txhuam mesh thaum siv lub tshuab luam ntawv glaze.

Qhov kev daws teeb meem yog los kho tus nqi ntawm CMC, kom cov luam ntawv glaze viscosity yog nruab nrab, yog tias tsim nyog, ntxiv me me dej kom sib npaug.

3.4, thaiv lub network, so lub sijhawm.

Txoj kev daws teeb meem yog txhawm rau txhim kho pob tshab thiab solubility ntawm CMC.Kev npaj roj luam ntawv tom qab ua tiav ntawm 120 mesh sieve, luam ntawv roj kuj yuav tsum dhau 100 ~ 120 mesh sieve;Kho cov luam ntawv glaze viscosity.

3.5, dej tuav tsis zoo, tom qab luam ntawv cov hmoov nplej, cuam tshuam rau kev luam ntawv tom ntej.

Txoj kev daws teeb meem yog txhawm rau nce tus nqi ntawm glycerin hauv cov txheej txheem ntawm kev luam ntawv roj;Hloov mus rau qib siab ntawm kev hloov pauv (hloov zoo uniformity), tsis tshua muaj viscosity CMC los npaj cov roj luam ntawv.