CMC e bapala karolo efe ho lirafshoa?

Carboxymethyl cellulose (CMC) e bapala karolo e ngata le ea bohlokoahali sebakeng sa lirafshoa. Ho tloha ho sebopeho le ho theha ho ea ho ho ntlafatsa thepa le ts'ebetso, CMC e eme e le tlatsetso ea bohlokoa e amang haholo mekhahlelo e fapaneng ea ts'ebetso ea ceramic. Moqoqo ona o felletseng o shebana le ho kenya letsoho ho rarahaneng ha CMC ho lirafshoa, ho akaretsa mesebetsi ea eona, lits'ebetso le litlamorao.

Kenyelletso ea CMC ho Ceramics:

Li-ceramics, tse khetholloang ka tlhaho ea tsona ea tlhaho le thepa e tsotehang ea mochine, mocheso le motlakase, e 'nile ea e-ba karolo ea tsoelo-pele ea batho ka lilemo tse likete. Ho tloha linthong tsa khale tsa letsopa ho ea ho lirafshoa tsa tekheniki tse tsoetseng pele tse sebelisoang sebakeng sa sefofane le lisebelisoa tsa elektroniki, lirafshoa li kenyelletsa mefuta e mengata ea thepa. Tlhahiso ea likarolo tsa ceramic e kenyelletsa mehato e rarahaneng ea ts'ebetso, e 'ngoe le e' ngoe ea bohlokoa bakeng sa ho fihlela thepa le botle bo lakatsehang.

CMC, e nkiloeng ho cellulose, e hlaha e le motsoako oa bohlokoa mekhoeng ea ceramic, ka lebaka la thepa ea eona e ikhethang le ts'ebetso e fapaneng. Sebakeng sa lirafshoa, CMC e sebetsa haholo-holo e le setlamo se kopanyang le sa rheology, se susumetsang haholo boitšoaro ba ho emisoa le li-paste ka mekhahlelo e fapaneng ea ts'ebetso. Moqoqo ona o lekola karolo e nang le likarolo tse ngata tsa CMC ho lirafshoa, e senola tšusumetso ea eona ho bōpeng, ho theha le ho ntlafatsa thepa ea thepa ea ceramic.

1. CMC e le Binder in Ceramic Formulations:

1.1. Mokhoa oa ho Tlama:

Ts'ebetsong ea ceramic, karolo ea li-binders ke ea bohlokoa, kaha ba na le boikarabelo ba ho tšoara likaroloana tsa ceramic hammoho, ho fana ka momahano, le ho thusa ho thehoa ha 'mele e tala. CMC, ka thepa ea eona ea sekhomaretsi, e sebetsa e le setlamo se sebetsang ka har'a liforomo tsa ceramic. Mochine o tlamang oa CMC o kenyelletsa litšebelisano lipakeng tsa lihlopha tsa eona tsa carboxymethyl le bokaholimo ba likaroloana tsa ceramic, ho khothaletsa ho khomarela le ho momahana ka har'a matrix a ceramic.

1.2. Ntlafatso ea Matla a Tala:

O mong oa mesebetsi ea mantlha ea CMC joalo ka setlamo ke ho matlafatsa matla a matala a 'mele ea ceramic. Matla a matala a bolela botšepehi ba mochine oa likarolo tse sa chesoang tsa ceramic. Ka ho tlama likaroloana tsa ceramic ka katleho, CMC e tiisa sebopeho sa 'mele e tala, e thibela ho senyeha le ho robeha nakong ea mehato e latelang ea ts'ebetso e kang ho tšoara, ho omisa le ho thunya.

1.3. Ho ntlafatsa ts'ebetso le polasetiki:

CMC e boetse e kenya letsoho ho sebetsa le polasetiki ea li-paste tsa ceramic le li-slurries. Ka ho fana ka lubrication le momahano, CMC e thusa ho theha le ho theha 'mele ea ceramic ka mekhoa e fapaneng e kang ho lahlela, extrusion le ho hatella. Ts'ebetso ena e ntlafalitsoeng e lumella ho qaptjoa ka mokhoa o rarahaneng le ho nepahala ha likarolo tsa ceramic, tse bohlokoa bakeng sa ho fihlela meralo le boholo bo lakatsehang.

2. CMC joalo ka Mofetoleli oa Rheology:

2.1. Ho laola Viscosity:

Rheology, thuto ea boits'oaro ba phallo le deformation ea thepa, e bapala karolo ea bohlokoa ts'ebetsong ea ceramic. Li-ceramic suspensions le li-pastes li bonts'a thepa e rarahaneng ea rheological, e susumetsoang ke lintlha tse kang kabo ea boholo ba likaroloana, ho kenya lintho tse tiileng, le mahloriso a tlatsetso. CMC e sebetsa joalo ka mofetoleli oa rheology, e fana ka taolo holim'a viscosity le litšobotsi tsa phallo ea ho emisoa ha ceramic.

2.2. Ho thibela Sedimentation le ho Lokisa:

E 'ngoe ea liqholotso ts'ebetsong ea ceramic ke tšekamelo ea likaroloana tsa ceramic ho lula kapa ho thella ka har'a ho emisoa, ho lebisang ho aroleng ho sa tšoaneng le ho senyeha ha homogeneity. CMC e fokotsa taba ena ka ho sebetsa joalo ka moemeli ea qhalakanyang le ea tsitsitseng. Ka tšitiso steric le repulsion electrostatic, CMC thibela agglomeration le ho lokisa likaroloana ceramic, ho etsa bonnete ba ho hasana junifomo le homogeneity ka hare ho fanyeha.

2.3. Ntlafatso ea Lintho tsa Phallo:

Thepa e nepahetseng ea phallo e bohlokoa bakeng sa ho etsoa ha likarolo tsa ceramic tse nang le tekano e ts'oanang le ho nepahala ha boholo. Ka ho fetola boits'oaro ba rheological ba ho emisoa ha ceramic, CMC e ntlafatsa thepa ea phallo, e nolofatsa lits'ebetso tse joalo ka ho thella, ho akhela theipi le ho bopa ente. Phallo ena e ntlafetseng e etsa hore ho behoe ka nepo thepa ea ceramic, e lebisang ho thehoeng ha libopeho tse rarahaneng le lijeometri tse rarahaneng.

3. Mesebetsi e Eketsehileng le Likopo tsa CMC ho Ceramics:

3.1. Deflocculation le Phatlalatso:

Ntle le karolo ea eona e le setlamo le rheology modifier, CMC e sebetsa joalo ka deflocculant ho emisoa ka ceramic. Deflocculation e kenyelletsa ho qhala likaroloana tsa ceramic le ho fokotsa tšekamelo ea bona ea ho kopanya. CMC e fihlella deflocculation ka ho repulsion electrostatic le steric block, ho khothaletsa ho emisoa ho tsitsitseng ka thepa e ntlafalitsoeng ea phallo le viscosity e fokotsehileng.

3.2. Ho Ntlafatsa Mekhoa ea Tšebetso e Tala:

Mekhoa ea ts'ebetso e tala e kang ho lahlela theipi le ho lahla litšepe li itšetlehile ka metsi le botsitso ba ho emisoa ha ceramic. CMC e bapala karolo ea bohlokoa mekhoeng ena ka ho ntlafatsa thepa ea rheological ea ho emisoa, ho etsa hore ho be le sebopeho se nepahetseng le ho beha likarolo tsa ceramic. Ho feta moo, CMC e thusa ho tlosoa ha 'mele e tala ho tloha hlobo ntle le tšenyo, ho ntlafatsa katleho le lihlahisoa tsa mekhoa e tala ea ho sebetsa.

3.3. Ntlafatso ea Thepa ea Mechini:

Keketso ea CMC mefuteng ea ceramic e ka fana ka thepa e ntle ea mochini lihlahisoa tsa ho qetela. Ka ts'ebetso ea eona e tlamang le ho matlafatsa matrices a ceramic, CMC e matlafatsa matla a tsitsitseng, matla a feto-fetohang, le ho robeha ho thata ha thepa ea ceramic. Ntlafatso ena ea thepa ea mochini e ntlafatsa ho tšoarella, ho ts'epahala le ts'ebetso ea likarolo tsa ceramic lits'ebetsong tse fapaneng.

Qetello:

Qetellong, carboxymethyl cellulose (CMC) e bapala karolo e ngata le ea bohlokoahali ho lirafshoa, e sebetsa e le setlamo, mofetoleli oa rheology, le tlatsetso e sebetsang. Ho tloha ho sebopeho le ho theha ho ea ho ntlafatsa thepa le ts'ebetso, CMC e susumetsa mekhahlelo e fapaneng ea ts'ebetso ea ceramic, e kenyang letsoho ho thehoeng ha lihlahisoa tsa boleng bo holimo tsa ceramic. Thepa ea eona ea sekhomaretsi, taolo ea rheological, le litlamorao tse hasaneng li etsa hore CMC e be tlatsetso e fapaneng e nang le lits'ebetso tse atileng ho lirafshoa tsa setso le tse tsoetseng pele. Ha mahlale a ceramic a ntse a tsoela pele ho fetoha, bohlokoa ba CMC ho fihlela thepa e lakatsehang, ts'ebetso, le botle bo botle bo tla lula bo le bohlokoa, bo tsamaisang boqapi le tsoelopele lefapheng la lirafshoa.