Rau nickel xav, porosity yog ib qho tseem ceeb parameter uas txiav txim siab nws cov kev ua tau zoo. TOPTITECH's npib tsib xee muaj cov qauv porosity ntawm 60% -80%, ua tau raws li cov kev xav tau ntawm cov txheej txheem thauj khoom hauv ntau qhov kev lag luam, tshwj xeeb tshaj yog kev lag luam electrolytic.
Txawm hais tias qhov zoo li qhov porosity ntau yog qhov tshwm sim ntawm qhov sib npaug ntawm qhov pom kev ua haujlwm zoo, electrode reactivity, suab nqus, thiab lub zog siv tshuab, tsab xov xwm no yuav piav qhia txog cov txheej txheem hauv qab thiab cov txheej txheem ntawm nickel xav tias porosity tswj, nthuav tawm cov txuj ci tseem ceeb hauv kev lag luam.
Porosity: "Baton" ntawm Nickel Felt Performance
Nyob rau hauv lub ntiaj teb microscopic ntawm nickel xav, lub pore qauv zoo li lub nroog txoj kev thauj mus los:
►High porosity (75%-80%) tsim lub qhov dej-tsim peb-dimensional los ntawm- pore qauv, muab qis- txoj hauv kev tsis kam rau cov kua dej (gases, kua, thiab ions), ua kom pom tau zoo electrodes, high-tam sim no suab absorrent.
► Nruab nrab-rau- siab porosity (60%-75%): Qhov ntau yam no tswj cov permeability zoo thaum ntsuas kev txhawb nqa tshuab thiab hluav taws xob / thermal network stability. Nws sawv cev rau qhov zoo tshaj plaws rau cov ntawv thov xws li kev txhawb nqa catalytic, sealing cov ntaub ntawv, thiab electromagnetic shielding.
Precisely tswj porosity yog qhov tseem ceeb ntawm kev sib tw ntawm cov khoom siv nickel hauv lawv cov phiaj xwm kev siv.
Cov txheej txheem tseem ceeb rau kev tswj qhov porosity
1. Lub Tsev Tsim Kho Fiber
Cov fibers zoo (piv txwv li, 8-15μm nyob rau hauv txoj kab uas hla) tso cai rau denser tes hauj lwm, uas ua rau muaj ntau pores thiab ib tug siab deg cheeb tsam. Coarse fibers (20-50μm nyob rau hauv txoj kab uas hla) yuav tsim cov qauv nrog loj pores thiab siab permeability. Txoj kab uas hla tswj los ntawm precision kos duab los yog yaj spinning teeb lub suab rau porosity.
2. Mat Tso thiab tsim
Airflow/Wet Laying: Airflow velocity, fiber ntau concentration, thiab uniformity ntawm deposition ncaj qha txiav txim qhov pib porosity ntawm fiber pawg.
Tsawg concentration thiab qeeb deposition yog qhov tseem ceeb rau kev ua tiav siab pib porosity (txog 85% +), tab sis agglomeration yuav tsum tau ua tib zoo tiv thaiv.
Mechanical felting (tus txheej txheem tseem ceeb): Daim npav daim npav, tus lej ntawm cov txheej txheej txheej, thiab lub kaum sab xis crossover zoo tswj qhov ceev ntawm qhov xav tau.
Kev paub txog kev lag luam: Txo cov txheej txheej txheej txheej + nce daim npav ntsuas=ib qho kev xav zoo ≈ qhov kawg porosity ntau dua.
Ua ntej- nias thiab shaping: "fine-tuning knob" rau porosity
Siv cov kev tswj xyuas siab (ntau: 0.05-1.0 MPa) rau cov kev xav tau ua ntej sintering yog qhov ncaj qha thiab siv tau zoo ntawm kev tswj cov porosity.
3. Sintering
Nyob rau hauv H₂ lossis kev tiv thaiv lub tshuab nqus tsev, qhov kub siab (800-}1100 degree) tso cai rau cov fibers los ua metallurgical bonds ntawm lawv cov ntsiab lus sib cuag los ntawm qhov chaw diffusion thiab grain ciam diffusion. Sintering yog qhov tseem ceeb ntawm kev sib pauv ntawm lub zog thiab porosity.
4. Tshaj tawm - kev ua haujlwm
Tom qab sintering, micro- dov yog ua kom txo qhov porosity poob thaum ua kom lub tiaj tiaj. Qhov no yog cov qauv kev coj ua rau cov khoom uas muaj porosity ntawm 60-70%.
Kev tswj cov porosity ntawm nickel muaj kev xav yog qhov ua tiav ntawm cov ntaub ntawv tshawb fawb, txheej txheem engineering, thiab kev ua tau zoo. Los ntawm kev tsim microscopic ntawm cov fibers mus rau atomic diffusion thaum lub sij hawm sintering, txhua kauj ruam profoundly cuam tshuam txoj hmoo ntawm lub pore network. Mastering lub synergistic art ntawm fiber ntau morphology, lev ceev, ua ntej - nias siab, sintering qhov rais, thiab post- ua tiav tso cai rau cov neeg siv khoom ncaj qha ntawm cov khoom siv nickel uas ua tau raws li ntau yam kev thov.
