Honeycomb ceramics tau siv dav hauv ntau thaj teb, kev lag luam lag luam zoo heev ua rau lawv muaj kev sib pauv ntawm cov tshuab catalytic, thiab cov tshuab cua sov thiab cov ntxaij sov thiab cov ntxaij lim dej. Txawm li cas los xij, kev tsim khoom ntawm honeycomb ceramics yuav tsum tau thev naus laus zis thiab cov khoom siv zoo dua. HydroxyPropyyl methylulose (HPMC) tau ua pov thawj rau kev cog lus ntxiv rau honeycomb ceramics vim nws cov khoom zoo thiab cov nqi zoo.
HPMC yog cov tsis-ionic cellulose ether tsuas yog ua los ntawm cov pob zeb ntuj. Nws yog dej-soluble polymer uas sib tov yooj yim nrog dej. Raws li kev ua lag luam ua, HPMC tuaj yeem txhim kho cov khoom ntawm Ceramic Slurries, xws li viscosity, kev ruaj ntseg thiab kev sib dhos. Tom qab ntxiv HPMC, lub ceramic slurry tuaj yeem yog tusyees ntawm honeycomb substrate, pab kom tsis txhob muaj qhov tsis xws luag thiab cov kab nrib pleb hauv cov khoom kawg. Ntxiv mus, HPMC tuaj yeem siv los ua phau ntawv thaum ziab thiab tua hluav taws, uas tuaj yeem txhim kho lub zog thiab kev tawv ntawm honeycomb ceramics. Lub xub ntiag ntawm HPMC kuj tseem tuaj yeem tsim cov cheeb tsam siab dua ntawm honeycomb ceramics, uas yog conducive rau catalytic cov kev tshua.
Qhov kev sib txuas ntawm HPMC nce porosity ntawm honeycomb ceramics los ntawm kev sib tw ntawm 10%, uas yog ntaus nqi rau kev tsim ntawm kev sib tw Pore network. Qhov nce siab hauv qhov kev nce siab tau txais txiaj ntsig rau qhov sib txawv ntawm reactants hauv catalysic tshua. Tsis tas li ntawd, HPMC tuaj yeem txhim kho lub zog thiab kev tawv nqaij ntawm honeycomb ceramics los ntawm kev tsim cov khoom siv hluav taws xob yooj yim ntawm kev tua hluav taws xob thaum tua hluav taws. Qhov kev sib ntxiv ntawm HPMC ntxiv rau thaj tsam tshwj xeeb thaj tsam ntawm honeycomb ceramics los ntawm 23%, uas tuaj yeem txhim kho nws cov kev ua tau zoo.
Qhov kev sib ntxiv ntawm HPMC tuaj yeem txo cov shrinkage thiab deformation ntawm honeycomb ceramics, uas tau txais txiaj ntsig zoo rau nws txoj kev ruaj khov. Tsis tas li ntawd, HPMC kuj tuaj yeem nce cov khoom ntim cia ntawm honeycomb ceramics, yog li kev txhim kho lawv cov khoom siv mecha tshuab. HPMC kuj tseem txhim kho cov kev ua si catalytic ntawm honeycomb ceramics vim muaj thaj chaw nce thiab rho tawm cov khoom siv nquag.
HPMC kuj txwv tsis pub muaj honeycomb ceramics los ntawm deforming thiab tawg thaum qhuav los ntawm kev sib sau ua ruaj khov thiab yoog raws ntawm kev sib tw. Lawv xaus lus tias HPMC yog kev cog lus ntxiv rau kev ua tau zoo thiab ua tau zoo thiab ua tau zoo ntawm honeycomb ceramics.
HPMC yog qhov tshiab thiab cog lus honeycomb ceramic addicitive vim nws kev ua tau zoo thiab raug nqi-ua hauj lwm zoo. Qhov kev sib txuas ntawm HPMC tuaj yeem txhim kho cov khoom siv hluav taws xob, porosity, lub zog thiab catalytic ua kev ua haujlwm ntawm honeycomb ceramics. Tsis tas li ntawd, HPMC kuj tseem tuaj yeem txhim kho qhov ruaj khov sab ruaj khov, cov khoom siv mechanies thiab moulding txheej txheem ntawm honeycomb ceramics. Daim ntawv thov ntawm HPMC hauv honeycomb ceramics muaj peev xwm zoo nyob hauv ntau thaj teb. Cov kev tshawb fawb ntxiv yog tsim nyog los ua kom rov zoo dua ntawm HPMC, thiab tshawb nws cov tshuab ntawm kev ua hauv honeycomb ceramics.
Lub Sijhawm Post: Feb-19-2025