Taw qhia rau pretreatment ntawm nickel ua npuas ncauj

Nickel ua npuas ncaujyog cov khoom siv los ua cov roj teeb electrodes, thiab cov txheej txheem ntawm cov khoom siv nickel ua npuas ncauj zoo tib yam yog raws li hauv qab no: polyurethane daim txhuam cev yog thawj zaug conductivized, ces electrodeposited, thiab thaum kawg sintered.

Nyob rau hauv cov kauj ruam saum toj no, kev kho conductive feem ntau suav nrogchemical plating, txheej conductive nplaum, thiab nqus platingnyob rau hauv peb txoj kev; electrodeposition tuaj yeem yog sulfate lossis sulfamate nickel plating; Cov txheej txheem sintering uas twb muaj lawm yog thawj zaug ua tiav los ntawm huab cua hlawv tawm ntawm polyurethane daim txhuam cev, thiab tom qab ntawd txo thiab sintering daim txhuam cev hauv qab hydrogen txo qhov cua hauv ob kauj ruam, nyob rau hauv cov huab cua kub ntawm polyurethane daim txhuam cev yog oxidized thiab decarbonized ntawm qhov kub ntawm 300 mus rau 700. °C. Cov txheej txheem sintering yog ua tiav los ntawm huab cua kub hnyiab tawm ntawm polyurethane daim txhuam cev, thiab tom qab ntawd txo thiab sintering polyurethane daim txhuam cev hauv ib qho chaw hydrogen txo; Kev kho txo ​​qis yog ua nyob rau hauv hydrogen txo qhov chaw ntawm qhov kub ntawm 800 txog 1000 ° C rau 30-60 feeb, thiab qhov txo qis cua yog ammonia decomposition gas, thiab cov roj decomposition noj yog 0.8-1.2 L / g (txhua gram. ntawm nickel yuav tsum tau 0.8-1.2 litres ntawm ammonia decomposition gas yuav tsum tau noj)

Txhim kho txoj kev uanickel ua npuas ncaujCov kauj ruam uas muaj xws li conductivization, electrodeposition thiab sintering ntawm ib tug polyurethane daim txhuam cev, tus cwj pwm nyob rau hauv hais tias sintering kauj ruam yog mus pyrolyze thiab sinter lub polyurethane ua npuas ncauj ncaj qha nyob rau hauv ib tug txo qhov chaw tom qab electrodeposition, nyob rau hauv qhov txo qhov cua yog ammonia decomposition gas, txo qhov kub thiab txias. yog 400-1000 ° C., lub sij hawm txo yog 30-60 feeb, thiab tus nqi ntawm decomposition gas noj yog 0.4-0.8 L / g. (Txhua gram ntawm npib tsib xee yuav tsum haus 0.4-0.8 litres ntawm ammonia decomposition gas.) Cov ammonia decomposition gas yog sib tov ntawm nitrogen thiab hydrogen, thiab qhov ntim piv ntawm nitrogen thiab hydrogen yog 1: 3.

Cov tshuaj tiv thaiv mechanism yog tias tom qab electrodeposition ntawmnickel ua npuas ncaujmuaj polyurethane sponge ncaj qha nyob rau hauv lub hydrogen txo cua pyrolysis sintering, qhov twg cov pa roj carbon thiab hydrogen ua, tsim CH4, C2H6 thiab lwm yam gaseous hydrocarbons, cov saum toj no gasification txheej txheem yog txaus kom tshem tawm cov graphite C nyob rau hauv lub ntxeem tau lub cev huv si.

Nws muaj txiaj ntsig zoo daws cov teeb meem uas twb muaj lawm hauv cov tshuab nickel ua npuas ncauj hauv cov txheej txheem sintering, xws li yooj yim rau tawg, deformation arching, tsis tshua muaj yield, siab zog noj, npib tsib xee ua npuas ncauj txhua yam khoom tsis ruaj khov.