Adhesives ua lub luag haujlwm tseem ceeb hauv ntau yam kev lag luam thiab kev siv; lawv lub luag haujlwm tseem ceeb yog los muab kev sib koom ua ke muaj zog, yog li ua kom muaj kev sib txuas nruj thiab ruaj ntseg ntawm cov khoom sib txawv. Raws li qhov tshwm sim, lawv muaj ntau yam khoom sib txawv tsim los ua kom haum rau kev ua haujlwm sib txawv thiab ib puag ncig.
Lub luag haujlwm tseem ceeb ntawm cov nplaum yog tshwm sim hauv cov ntsiab lus hauv qab no:
Ua ntej, adhesives muaj kev sib koom ua ke siab zog thiab kho tus nqi sai, uas ua rau muaj txiaj ntsig zoo rau ob qho kev pabcuam lub neej thiab kev zoo nkauj ntawm ntau yam khoom sib txuas. Piv txwv li, hauv kev lag luam ceramics, adhesives xyuas kom meej tias cov ntaub ntawv -xws li cov vuas ceramic - tseem ruaj khov yam tsis muaj kev sib cais thaum lub sijhawm teeb tsa, thaum tib lub sijhawm txhawb nqa tag nrho cov qauv kev ntseeg siab ntawm cov khoom siv ceramic tiav.
Qhov thib ob, adhesives muaj kev ua haujlwm zoo thiab siv tau yooj yim. Lawv tsuas yog xav tau qhov sib ntxiv ntawm cov dej uas tsim nyog thiab sib xyaw yooj yim kom npaj rau daim ntawv thov; Tsis tas li ntawd, cov ntaub ntawv yuav tsum tau sib txuas tsis tas yuav tsum tau soaking ua ntej thiab tuaj yeem siv ncaj qha. Tsis tas li ntawd, cov nplaum nplaum muaj cov dej tuav zoo dua, plasticity, thiab sag resistance, yog li ua kom yooj yim dua thiab ua haujlwm zoo dua.
Thib peb, cov nplaum ua kom pom qhov tshwj xeeb compressive thiab tensile lub zog, ua ke nrog muaj zog tiv taus dej, alkali, thiab huab cua. Qhov no ua kom ntseeg tau tias cov nplaum tuav ruaj khov ua haujlwm thoob plaws ntau yam ntawm ib puag ncig ib puag ncig, tsis muaj kev cuam tshuam los ntawm lwm yam ib puag ncig.
Nyob rau hauv cov nqe lus ntawm tej yam ntxwv, adhesives muaj ntau yam tshwj xeeb zog:
Ua ntej, cov nplaum muaj cov yam ntxwv ntws ntws, ua rau lawv sib xyaw nrog cov khoom siv hmoov thiab muab cov dej ntws mus rau qhov sib tov. Qhov zoo ntawm qhov fluidity no ncaj qha cuam tshuam nrog qhov hnyav molecular thiab molecular hnyav faib ntawm cov nplaum. Adhesives nrog qis molecular luj feem ntau pom qis viscosity thiab superior fluidity, whereas cov uas muaj siab molecular luj yuav muaj viscosity ntau dua thiab tsis muaj fluidity.
Qhov thib ob, adhesives zoo ntub cov hmoov av, yog li tsim kom muaj zog thiab siv tau cov nplaum nplaum. Txhawm rau txhim kho kev ua haujlwm ntub dej ntawm cov nplaum, nto- cov neeg ua haujlwm nquag- xws li titanates lossis stearates - feem ntau muab tso rau hauv cov qauv. Cov neeg ua hauj lwm no ua raws li kev sib txuas lus sib txuas ntawm cov hmoov av thiab cov nplaum, txo cov viscosity ntawm cov sib tov thiab ua kom nws cov dej ntws. Raws li qhov tshwm sim, los ntawm kev ntub cov khoom, cov nplaum ua kom muaj zog capillary uas pab txhawb cov khoom siv adsorption, yog li pab tswj cov txheej txheem kev ncaj ncees ntawm lub cev ntsuab (cov khoom tsis raug tua) thiab tiv thaiv kev deformation.
Tsis tas li ntawd, cov nplaum feem ntau muaj cov thermal conductivity siab thiab qis coefficient ntawm thermal expansion. High thermal conductivity pab tiv thaiv kev tsim ntawm qhov tsis xws luag tshwm sim los ntawm thermal kev nyuaj siab, thaum lub coefficient tsawg ntawm thermal expansion txo cov thermal poob siab los ntawm lub cev ntsuab, yog li txo qhov tsis xws luag. Cov yam ntxwv no ua rau cov binders tseem ceeb hauv cov txheej txheem xws li ceramic txhaj tshuaj molding.
Zuag qhia tag nrho, cov dej num thiab cov khoom ntawm binders tsim lawv raws li cov ntaub ntawv tseem ceeb nyob rau hauv ntau yam kev lag luam sectors. Lawv cov kev sib raug zoo muaj zog, kev ua tau zoo thiab kev ruaj ntseg, nrog rau lawv cov yam ntxwv ntws tshwj xeeb thiab thermal conductivity, pab cov binders ua lub luag haujlwm tseem ceeb hauv cov teb xws li ceramics rau coated abrasives. Raws li kev siv thev naus laus zis txuas ntxiv mus thiab kev lag luam tau dhau los ua kev txhim kho sai, kev ua tau zoo thiab kev siv ntawm cov binders tau npaj rau kev nthuav dav ntxiv thiab kev ua kom zoo.
