Yog vim li cas axial tantalum capacitors tuav txoj haujlwm tseem ceeb hauv siab -cov khoom siv hluav taws xob muaj kev ntseeg siab nyob hauv lawv cov khoom siv tshwj xeeb thiab meej. Kev sib koom ua ke ntawm txhua cov khoom tseem ceeb endows cov khoom no nrog cov txiaj ntsig tseem ceeb xws li siab dielectric tas li, tsis tshua muaj poob, thiab qhov kub ntau yam ruaj khov. Kev nkag siab tob txog cov yam ntxwv ntawm cov khoom siv no yog qhov tseem ceeb rau kev nkag siab nws cov ntsiab lus ntawm kev ua haujlwm thiab kev txwv kev siv.
Lub cev Anode: Cov tub ntxhais muaj peev xwm siab -Purity Tantalum Hlau Hmoov
Lub hauv paus kev ua tau zoo ntawm axial tantalum capacitors nyob rau hauv lub cev anode - cov txheej txheem ntxeem tau ua los ntawm siab - purity (feem ntau Ntau dua lossis sib npaug li 99.9%) tantalum hlau hmoov los ntawm kev nias thiab sintering txheej txheem. Qhov tsis txaus thiab tshuaj inertness ntawm tantalum hlau muab lub ntuj corrosion-resistant puag; thaum lub sij hawm morphology thiab particle loj tis ntawm cov hmoov yog nruj me ntsis tswj, kom ntseeg tau tias ob qho tib si txhua yam muaj zog tom qab molding thiab nteg lub hauv paus rau lub tom ntej tsim ntawm ib tug siab -capacitance dielectric txheej los ntawm kev ua kom cov cheeb tsam tshwj xeeb (mus txog ob peb square meters ib gram). Thaum lub sij hawm sintering txheej txheem, metallurgical bonds yog tsim ntawm tantalum hmoov hais, tsim ib daim txhuam cev -zoo li cov qauv nrog interconnected pores. Qhov no microscopic feature ncaj qha txiav txim qhov zoo ntawm cov txheej txheem dielectric thiab lub zog cia txwv ntawm lub capacitor.
Dielectric Txheej: Tus Kheej -Kev Tiv Thaiv Kev Kho Mob ntawm Tantalum Pentoxide
Ib zaj duab xis nyias ntawm tantalum pentoxide (Ta₂O₅) yog tsim nyob rau saum npoo ntawm lub cev anode los ntawm cov txheej txheem anodic oxidation, uas yog cov tub ntxhais dielectric ntawm lub capacitor. Qhov no oxide muaj ib tug heev dielectric tas li (kwv yees li 27), deb tshaj cov txhuas oxide dielectric ntawm tsoos txhuas electrolytic capacitors, ho nce lub capacitance ib chav tsev ntim. Qhov tseem ceeb tshaj, Ta₂O₅ muaj qhov tshwj xeeb "tus kheej- kho" cov cuab yeej: thaum lub dielectric nyob hauv zos tawg los ntawm overvoltage, tsim cov kab hluav taws xob me me, tam sim no ntws los ntawm cov channel oxidizes tantalum hlau ntawm qhov chaw tsis xws luag, rov kho qhov tsis xws luag thiab tiv thaiv kev ua txhaum cai. Qhov no tus kheej - kho lub peev xwm zoo heev txhim kho lub sij hawm ntev - kev cia siab ntawm lub capacitor, tshwj xeeb tshaj yog nyob rau hauv cov xwm txheej uas surge voltages nquag.
Cathode System: Dual Guarantee ntawm Conductivity thiab Stability
Txhawm rau sib npaug qhov siab impedance ntawm anode, axial tantalum capacitors siv cov qauv cathode sib xyaw. Kev sib cuag ncaj qha nrog Ta₂O₅ yog manganese dioxide (MnO₂) semiconductor txheej, uniformly coated mus rau dielectric nto los ntawm ib tug thermal decomposition cov tshuaj tiv thaiv, siv nws cov khoom semiconductor kom txo tau interface impedance. Cov txheej txheej txheej yog txheej txheej conductive muaj li ntawm graphite thiab nyiaj muab tshuaj txhuam, kom ntseeg tau tias tsis muaj kev tiv thaiv thiab zoo solderability. Lub thermal stability ntawm MnO₂ (decomposition kub> 300 degree) thiab cov conductivity ntawm graphite ua hauj lwm synergistically, tso cai rau lub cathode system kom ruaj khov them nqi txawm nyob rau hauv siab - kub ib puag ncig, tiv thaiv capacitance drift los yog to tam sim no surges.
Cov Khoom Siv Pabcuam: Invisible Support rau sealing thiab rwb thaiv tsev
Axial ntim cia siab rau epoxy resin lossis hlau casings kom ua tiav kev tiv thaiv airtight. Cov ntaub ntim khoom no yuav tsum muaj cov dej tsis muaj permeability (kom tsis txhob ya raws los ntawm corroding lub sab hauv active txheej) thiab siab rwb thaiv tsev tsis kam (kom suppress nto to tam sim no). Cov ncej txhuas feem ntau yog ua los ntawm tin-plated tooj liab lossis nyiaj-plated tooj liab. Cov qub sib npaug tus nqi thiab kev sib tw, thaum tom kawg txo cov tawv nqaij ua rau poob hauv siab - daim ntawv thov zaus.
Los ntawm hlau tantalum hmoov mus rau Ta₂O₅ dielectric, thiab tom qab ntawd mus rau cov cathode sib xyaw thiab ntim khoom, txhua yam khoom siv hauv axial tantalum capacitor tau txais kev xaiv meej thiab kev ua kom zoo dua. Qhov kev tswj xyuas qhov kawg ntawm cov ntaub ntawv microscopic no thaum kawg txhais mus rau hauv siab - kev ua tau zoo ntawm qib macroscopic, ua rau nws yog ib qho tseem ceeb ntawm cov khoom siv hluav taws xob hauv siab - kawg.
