Hauv kev lag luam ceramic,carboxymethyl cellulose (CMC), ib qho tshuaj polymer uas yaj tau hauv dej los ntawm cov cellulose ntuj. CMC tau dhau los ua ib qho khoom siv tseem ceeb hauv cov txheej txheem tsim cov khoom siv ceramic ntsuab thiab glazes vim nws cov khoom zoo heev uas ua rau tuab, sib txuas, khaws dej, ncua thiab kho rheological. Nws txhim kho qhov zoo ntawm qhov chaw thiab lub zog kho tshuab ntawm cov khoom siv ceramic los ntawm kev txhim kho cov khoom siv rheological ntawm cov khoom siv ceramic slurry thiab cov khoom siv tsim lub cev ntsuab, thiab muaj txiaj ntsig zoo rau kev lag luam thiab kev siv tshuab.
1. Cov khoom yooj yim ntawm CMC
Carboxymethyl cellulose yog ib qho polymer anionic uas yaj tau hauv dej los ntawm kev qhia cov carboxymethyl (–CH₂–COOH) pawg rau hauv cov cellulose ntuj los ntawm kev sib xyaw ua ke. Nws cov khoom tseem ceeb suav nrog:
Kev yaj zoo: Nws tuaj yeem yaj sai sai hauv dej txias thiab dej kub kom tsim tau cov tshuaj colloidal uas muaj viscosity siab.
Kev kho kom tuab thiab rheological: CMC kua muaj viscosity tseem ceeb thiab tuaj yeem kho thixotropy ntawm cov av nplaum thiab glaze, yog li nws tswj tau qee qhov sib xws thaum nres thiab txhim kho fluidity thaum do lossis shear zog siv.
Kev khaws dej thiab kev ruaj khov: CMC tuaj yeem txo qhov volatilization ntawm dej hauv av nkos thiab glaze, txhim kho kev ruaj khov, thiab zam kev stratification lossis sedimentation.
Kev Nyab Xeeb thiab kev tiv thaiv ib puag ncig: Los ntawm cov cellulose ntuj, nws yog biodegradable thiab muaj kev nyab xeeb rau kev siv.
2. Lub luag haujlwm tseem ceeb ntawm CMC hauv kev tsim cov khoom siv ceramic
2.1. Ua ib qho av nkos dispersant thiab thickener
Thaum npaj cov av nplaum ntsuab, CMC tuaj yeem txhim kho qhov fluidity thiab suspension ntawm cov av nplaum. Los ntawm kev ua kom cov viscosity thiab thixotropy ntawm cov av nplaum, CMC pab kom cov khoom ceramic sib npaug, tsis txhob muaj nag, thiab pab txhawb kev casting, spray granulation lossis slip injection molding, yog li txhim kho qhov ceev thiab uniformity ntawm cov av nplaum.
2.2. Ua ib qho kev pab molding thiab binder
Thaum lub sijhawm nias lossis extrusion molding, CMC tuaj yeem txhim kho qhov plasticity thiab lub zog sib txuas ntawm lub cev ntsuab, ua rau nws yooj yim dua rau demold thiab tsis tshua muaj kev tawg. Nws cov khoom sib txuas zoo heev kuj tseem tuaj yeem khi cov khoom ceramic thaum lub sijhawm ziab, txhim kho lub zog qhuav ntawm lub cev ntsuab, thiab txo qhov poob thaum lub sijhawm molding.
2.3. Txhim kho kev ua haujlwm ntawm cov iav
Hauv kev npaj glaze, CMC tuaj yeem txhim kho qhov kev ncua thiab kev ruaj khov ntawm cov glaze slurry, tiv thaiv kev sib sau ua ke thiab kev sib sau ua ke. Tsis tas li ntawd, CMC kho qhov thixotropy ntawm glaze slurry, ua rau cov txheej txheem glazing sib xws dua, txo qhov sagging, thiab txhim kho qhov tiav ntawm cov txheej glaze.
2.4. Kev tuav dej thiab kev tiv thaiv tawg
CMC tuaj yeem kaw cov dej noo hauv cov slurry thiab glaze, qeeb qeeb qhov ziab, thiab txo qhov kev pheej hmoo ntawm kev tawg thiab warping ntawm qhov chaw ntawm lub cev. Qhov no tseem ceeb heev rau cov khoom ceramic loj lossis nyias-phab ntsa, uas pab txhim kho qhov kev tsim nyog ntawm cov khoom.
2.5. Txhim kho qhov zoo ntawm cov khoom nto
Los ntawm kev txhim kho kev faib tawm ntawm cov khoom hauv lub cev thiab kev sib npaug ntawm cov iav, CMC ua rau qhov chaw ntawm cov khoom siv ceramic hlawv du thiab mos dua, thaum txo qhov tshwm sim ntawm cov qhov tsis zoo xws li qhov thiab npuas.
3. Daim ntawv thov CMC hauv cov txheej txheem ceramic sib txawv
Cov khoom siv ua los ntawm cov av nplaum txhua hnub: txhim kho cov dej ntws thiab lub zog ntawm cov khoom siv, thiab txo qhov deformation thiab tawg thaum lub sijhawm ziab thiab hlawv.
Kev tsim cov khoom siv av nplaum (cov vuas pobzeb av nplaum, cov vuas phab ntsa, cov vuas hauv pem teb): Txhim kho qhov sib npaug ntawm cov iav thiab qhov zoo ntawm cov iav, thiab ua kom cov txiaj ntsig ntau ntxiv.
Cov khoom siv ceramic tshwj xeeb: Hauv kev tsim cov khoom siv ceramics siab xws li cov khoom siv hluav taws xob thiab cov khoom siv ceramics ua haujlwm, CMC yog siv los tswj kev faib tawm ntawm cov khoom me me thiab txhim kho lub zog ntsuab.
Kev luam ntawv 3D Ceramic: Ua tus tswj hwm rheological thiab binder, nws pab kom tau txais cov slurry viscosity thiab kev luam ntawv raug.
4. Tej yam uas cuam tshuam rau qhov cuam tshuam ntawm CMC
Qib ntawm kev hloov pauv (DS): Qib ntawm carboxymethyl hloov pauv ntawm CMC molecules feem ntau yog ntawm 0.6–1.2. DS siab dua, qhov zoo dua qhov dej yaj thiab lub peev xwm tuab ntawm CMC.
Qhov hnyav molecular thiab viscosity: CMC viscosity siab muab cov dej tuav thiab cov nyhuv tuab dua, tab sis yuav ua rau cov kua ntawm cov slurry txo qis; qib tsim nyog yuav tsum tau xaiv raws li cov txheej txheem xav tau.
Tus nqi ntxiv: Tus nqi ntxiv ntawm CMC hauv kev tsim cov khoom siv ceramic feem ntau yog 0.1–0.5% ntawm qhov hnyav ntawm cov slurry, uas yuav tsum tau ua kom zoo dua los ntawm kev sim.
Txoj kev yaj thiab kev tawg: CMC yuav tsum tau yaj tag nrho los ntawm kev sib xyaw ua ke nrog kev txav siab ua ntej kom tsis txhob muaj kev sib sau ua ke kom ua tiav qhov zoo tshaj plaws.
5. Cov txiaj ntsig ib puag ncig thiab kev lag luam
CMC yog los ntawm cov cellulose ntuj, muaj kev puas tsuaj zoo heev thiab kev nyab xeeb, thiab ua tau raws li cov kev cai tiv thaiv ib puag ncig ntsuab ntawm kev lag luam ceramic niaj hnub no. Tsis tas li ntawd, cov txiaj ntsig ntxiv ntawm CMC tuaj yeem txo kev siv hluav taws xob, luv lub sijhawm ziab thiab txo cov khoom pov tseg, yog li txhim kho kev tsim khoom thiab cov txiaj ntsig kev lag luam.
Hauv kev lag luam ceramic,CMC (carboxymethyl cellulose) yog ib qho tseem ceeb heev rau kev ua haujlwm ntawm cov khoom siv no.Nws pab cov khoom siv ceramic ua tiav qhov zoo dua thiab ua haujlwm tau zoo dua los ntawm kev txhim kho cov khoom rheological ntawm cov av nkos thiab glaze, txhim kho lub zog sib txuas thiab lub zog qhuav ntawm lub cev, thiab ua kom zoo dua cov nyhuv glazing. Nrog rau kev lag luam ceramic nrhiav kev tiv thaiv ib puag ncig ntsuab thiab kev ua haujlwm siab, daim ntawv thov CMC yuav dav dua.
Lub sijhawm tshaj tawm: Lub Xya Hli-28-2025