Kev ua haujlwm siab ntawm axial tantalum capacitors tsis yog qhov yuam kev, tab sis yog los ntawm kev nruj thiab ntau -faceted systematic composition method.Its manufacturing txheej txheem integrates hmoov metallurgy, electrochemical zaj duab xis tsim, semiconductor deposition, thiab ntim txheej txheem, nrog rau txhua kauj ruam txiav txim qhov kawg yam ntxwv thiab kev cia siab rau ntawm lub microcomponent theem. Kev nkag siab tob txog nws txoj kev muaj pes tsawg leeg yuav pab kom nkag siab zoo dua cov kev txwv thiab cov txheej txheem yuav tsum tau ua hauv cov ntawv thov.
Lub ntsiab lus pib ntawm qhov muaj pes tsawg leeg yog kev npaj thiab ua kom zoo ntawm siab -purity tantalum hlau hmoov. Tantalum hmoov nrog ib tug purity tsawg kawg yog 99.9% yog xaiv, thiab cov particle loj thiab morphology yog tswj los ntawm cov txheej txheem xws li tshuaj tsuag granulation los yog hydrogenation -dehydrogenation kom tau ib tug haum cheeb tsam thiab fluidity. Cov hmoov yog tom qab ntawd nias rau hauv qhov xav tau ntawm cov anode dawb paug hauv pwm. Lub siab yuav tsum raug tswj xyuas kom meej kom muaj lub cev ntsuab txaus thiab qhov kev xav tau ntawm qhov shrinkage thaum lub sij hawm tom qab sintering. Qhov zoo ntawm kev nias ncaj qha cuam tshuam rau qhov sib xws ntawm lub pore qauv, uas nyob rau hauv lem txiav txim siab qhov zoo ntawm qhov chaw thiab capacitance sib xws thaum lub sij hawm tsim ntawm dielectric txheej.
Qhov thib ob theem yog siab -kub sintering. Cov nias dawb yog muab tso rau hauv lub tshuab nqus tsev lossis lub qhov cub tsis zoo thiab tuav ntawm qhov kub siab tshaj 2000℃rau lub sijhawm txaus los tsim cov hlau sib txuas ntawm cov tantalum hmoov, tsim ib daim txhuam cev -zoo li peb- cov qauv kev sib txuas nrog cov pores. Cov qauv no tsis yog tsuas yog muaj lub zog zoo heev, tab sis kuj muab cov tshuaj tiv thaiv loj heev rau cov anodic oxidation tom ntej. Kev tswj xyuas meej ntawm sintering kub thiab lub sijhawm yog qhov tseem ceeb kom tsis txhob muaj qhov txawv txav ntawm kev loj hlob ntawm cov qoob loo thiab cov pore vau, cuam tshuam ncaj qha rau lub peev xwm thiab qhov hluav taws xob tsis kam ntawm cov khoom tiav.
Qhov thib peb kauj ruam yog anodic oxidation los tsim tantalum pentoxide dielectric txheej. Lub sintered tantalum anode lub cev yog immersed nyob rau hauv ib tug acidic electrolyte, thiab ib tug tas mus li tam sim no los yog voltage yog thov rau electrochemical oxidation, converting nto rau hauv ib tug nyias nyias Ta₂O₅ zaj duab xis. Lub thickness ntawm dielectric txheej yog txiav txim los ntawm oxidation voltage, feem ntau ntawm kaum thiab pua pua nanometers. Nws uniformity thiab ceev txiav txim qhov to tam sim no thiab voltage kuj ntawm lub capacitor. Cov kauj ruam no yuav tsum tau tswj qhov kub thiab txias kom huv si kom tsis txhob muaj pinholes lossis cov ntsiab lus tsis muaj zog hauv zos.
Tom qab ntawd, ib qho kev sib xyaw cathode yog tsim. Ua ntej, ib txheej manganese dioxide (MnO₂) semiconductor txheej yog tso rau ntawm Ta₂O₅ nto ntawm thermal decomposition kom nruj adhesion thiab txuas hluav taws xob txuas nrog dielectric. Tom qab ntawd, ib txheej txheej ntawm graphite thiab nyiaj muab tshuaj txhuam yog siv los ua ib qho qis -tsis kam mus rau sab nraud. Lub thermal stability ntawm MnO₂ thiab cov conductivity ntawm graphite ua ke kom ruaj khov cathode kev ua tau zoo ntawm qhov kub thiab txias.
Thaum kawg, cov txheej txheem ntim khoom pib. Nyob ntawm daim ntawv thov ib puag ncig, epoxy resin encapsulation los yog hlau casing sealing raug xaiv los xyuas kom tsis muaj noo noo permeability thiab zoo rwb thaiv tsev. Axial leads feem ntau yog ua los ntawm tin-plated los yog silver-plated tooj liab, uas yog kev cob cog rua rau lub cathode txheej tom qab shaping thiab txiav, thiab ces coj tawm raws li axial kev taw qhia rau plug- nyob rau hauv sib dhos. Qhov chaw vuam yuav tsum muaj kev tiv thaiv kev tiv thaiv - oxidation kev kho mob, thiab kev ntsuas hluav taws xob thawj zaug ua tiav ua ntej ntim khoom los tshuaj xyuas cov khoom tsis zoo thaum ntxov.
Zuag qhia tag nrho, txoj kev tsim khoom ntawm axial tantalum capacitors koom nrog kev sib koom ua ke ntawm ntau cov txheej txheem, nrog rau kev xaiv cov khoom, molding thiab sintering, dielectric tsim, cathode tsim, thiab sealing thiab txhuas - tawm. Tsuas yog thaum qhov tseeb thiab kev huv ntawm txhua theem sib koom ua ke tuaj yeem ua cov khoom lag luam uas muaj peev xwm loj, tsis tshua muaj ESR, qhov kub thiab txias, thiab tus kheej- muaj peev xwm kho tau, ua tau raws li qhov xav tau ntawm kev ntseeg siab ntawm siab -kawg hluav taws xob.
