Nyob rau hauv precision manufacturing thiab nto engineering, platinum (Pt) coatings ua lub luag hauj lwm tseem ceeb nyob rau hauv aerospace, hydrogen roj hlwb, electronics, thiab tshuaj catalysis vim lawv tshwj xeeb catalytic kev ua si, corrosion kuj, thiab conductivity. Raws li cov chaw tsim khoom tshwj xeeb ntawm cov txheej txheem platinum, peb lees paub tias kev xaiv txheej txheej txheej txheem ncaj qha txiav txim siab cov khoom lag luam, nqi, thiab kev pabcuam lub neej.
Tam sim no, cov txheej txheem tseem ceeb ntawm platinum txheej npaj poob rau hauv peb pawg: Txhuam Txheej, Electroplating, thiab Lub Cev Vapor Deposition (PVD). Cov txheej txheem no txawv heev hauv cov ntsiab cai, cov nqi tso nyiaj, kev tswj cov tuab, thiab cov xwm txheej siv tau. Raws li cov ntaub ntawv tshawb fawb txog kev lag luam thiab kev lag luam, tsab xov xwm no taw qhia cov yam ntxwv, qhov zoo, thiab kev txwv ntawm txhua tus txheej txheem rau koj siv.
● Txhuam Txheej●
Txhuam txheej yog txheej txheem ntub dej ib txwm siv uas lub platinum - muaj cov kua lossis muab tshuaj txhuam yog siv ncaj qha rau ntawm qhov chaw substrate. Cov neeg ua haujlwm siv cov txhuam hniav los yog cov tshuaj tsuag tsuag kom tso cov khoom ua ntej - npaj platinum slurry los yog tov rau hauv cov cheeb tsam, tom qab ziab thiab kho cua sov rau solidification thiab sintering.
Cov yam ntxwv thiab qhov zoo:
Simplicity thiab Flexibility: Yuav tsum tau siv cov cuab yeej siv tsawg tsawg - tsis muaj cov khoom siv hluav taws xob nyuaj lossis lub tshuab nqus tsev. Zoo- haum rau ib qho -daim lossis me me-batch ntau lawm, thiab ua rau "point-to-taw tes" kho coatings ntawm cov khoom loj lossis cov cheeb tsam tshwj xeeb.
Thickness Control: Feem ntau yields kuj nyias platinum txheej, nrog thickness txiav txim los ntawm slurry concentration thiab tus naj npawb ntawm txhuam hla; uniformity yog cuam tshuam los ntawm tus neeg teb xov tooj txheej txheem.
Kev txwv:
Adhesion thiab Zoo: Adhesion ntawm du substrates yuav tsis muaj zog tshaj qhov ua tiav los ntawm PVD lossis electroplating. Vim lub thinness thiab muaj peev xwm porosity ntawm txheej, corrosion kuj thiab ntev -lub sij hawm stability yog qhov qis dua.
Siab -Tseem Ceeb Sintering Requirements: Feem ntau yuav tsum tau tom qab high -kub kub kho kom tshem tawm cov organics thiab ua kom tiav metallization, ua rau nws tsis haum rau qhov kub thiab txias -sensitive substrates xws li tej yam polymers.
●Electroplating●
Electroplating siv cov txheej txheem electrolytic- nyob rau hauv ncaj qha tam sim no, platinum hlau ions nyob rau hauv cov electrolyte (xws li, chloroplatinic acid, P- ntsev, los yog Q- ntsev tshuab) raug txo thiab tso rau ntawm cathode (workpiece) nto. Qhov no yog ib qho ntawm cov neeg paub tab zoo tshaj plaws hlau txheej thev naus laus zis hauv kev lag luam.
Cov yam ntxwv thiab qhov zoo:
Lub Hwj Chim Zoo Tshaj Plaws: Electroplating tuaj yeem tsim cov kev pab cuam zoo sib xws ntawm cov khoom ua haujlwm zoo li -xws li xov, qhov tob, thiab cov yeeb nkab sab hauv) thiab ua kom muaj qhov zoo ntawm microscopic nto roughness ntawm substrate.
Kev npaj ua yeeb yaj kiab tuab: Los ntawm kev ncua sij hawm plating los yog ntiav cov txheej txheem da dej tshwj xeeb (xws li molten ntsev electroplating), cov platinum ntom ntom ntawm ntau kaum lossis ntau pua micrometers tuaj yeem tsim tau yooj yim. Piv txwv li, Q- ntsev los yog P- ntsev tshuab tawm los siab -purity tuab platinum txheej haum rau siab - kub diffusion txheej txheem.
Kev txwv:
Environmental and Safety Burden: Electrolytes feem ntau muaj cyanide, ammonia, los yog cov kua qaub uas muaj zog, thiab cov txheej txheem tsim cov dej khib nyiab uas muaj cov hlau hnyav, uas ua rau cov nqi kho ib puag ncig siab.
Substrate Conductivity Requirement: Siv tau rau cov khoom siv hluav taws xob nkaus xwb. Tsis yog-metallic substrates yuav tsum tau electroless ua ntej- kho lossis metallization ua ntej.
Co-deposition Impurity Risk: Rau siab- daim ntawv thov kub, impurities xws li chlorine, sulfur, los yog phosphorus entrained nyob rau hauv cov deposit yuav ua rau voids los yog spalation thaum elevated - kub kev pab cuam.
● Lub cev Vapor Deposition (PVD) ●
PVD yog lub tshuab nqus tsev-raws li cov txheej txheem uas lub cev vaporizes platinum lub hom phiaj rau hauv atoms los yog ions (xws li, los ntawm magnetron sputtering los yog electron-beam evaporation) thiab tso lawv mus rau lub substrate nto los ua ib zaj duab xis nyias.
Cov yam ntxwv thiab qhov zoo:
High Material Utilization and Purity: Enables atomic-level deposition control, producing dense platinum films of exceptionally high purity. Hauv kev siv roj hluav taws xob, PVD tuaj yeem ua tiav qhov sib npaug nrog 20 nm txheej thickness piv rau 200 nm los ntawm cov pa electroplating, uas yuav txuag tau txog li 90% ntawm kev siv platinum.
Superior Adhesion: High-lub zog platinum particles bombard lub substrate nto thaum lub sij hawm deposition, txhawb metallurgical bonding-adhesion yog deb tshaj rau cov txheej txheem ntub dej.
Kev siv dav dav: Zoo li tsis txwv los ntawm hom substrate (hlau, ceramics, thiab txawm tias qee qhov kub thiab txias - cov yas siab ntev), thiab ua kom yooj yim rau ntau- txheej txheej txheej (piv txwv li, Pt-Al).
Kev txwv:
Cov Khoom Siv thiab Cov Nqi Them Nqi: Yuav tsum muaj lub tshuab nqus tsev siab thiab cov plasma complex- cov cuab yeej tsim, nrog cov peev nyiaj ntau dua thiab cov nqi kho mob piv rau lwm cov txheej txheem.
Kab-ntawm-Sight Effect: Deposited particles taug kev hauv txoj kab ncaj nraim, ua rau muaj kev cuam tshuam shadowing. Ua kom tau raws li qhov sib xws ntawm qhov nyuaj - zoo li qhov chaw nrog qhov sib sib zog nqus los yog qhov chaw recessed yog qhov nyuaj thiab feem ntau yuav tsum tau siv cov khoom ua haujlwm zoo sib xws.
Cov lus pom zoo xaiv
Tsis muaj txheej txheem txheej "zoo tshaj" -tsuas yog cov tshuaj uas tsim nyog tshaj plaws. Peb pom zoo kom koj ntsuas raws li qhov loj me hauv qab no:
►Rau kev ua haujlwm zoo, corrosion- tiv taus cov yeeb yaj kiab tuab, thiab nyuaj- zoo li cov khoom ua haujlwm: Ua ntej Electroplating. Txawm hais tias tus nqi siab dua ib puag ncig kev ua raws cai, nws lub zog pov tseg zoo dua thiab kev tswj xyuas tuab yog qhov nyuaj los hloov nrog lwm cov txheej txheem.
►Rau siab -precision nyias zaj duab xis, ultra- txheej txheej catalytic, los yog xav tau adhesion thiab purity yuav tsum: Xav txog PVD. Tshwj xeeb tshaj yog nyob rau hauv lub siab platinum- nqi ib puag ncig, cov khoom txuag los ntawm PVD yog qhov tseem ceeb heev thiab tuaj yeem txo nqi ntau heev - ntawm - cov khoom siv.
►Rau kev kho hauv zos ntawm cov khoom loj, kev sim ua qauv, lossis kev siv nyiaj ntau heev -tso tseg ua ntej validation: Txhuam txheej muab kev yooj yim thiab tus nqi tsis sib piv- kev ua tau zoo, ua haujlwm qis - tus nqi nkag rau kev ntsuas cov txheej txheem platinum txheej txheem.
