Puas yog anodizing cuam tshuam rau hluav taws xob conductivity ntawm hlau?

Kev cuam tshuam ntawm Anodizing txheej txheem ntawm hlau conductivity

I. Cov Ntsiab Cai ntawm Cov Txheej Txheem Anodizing

Anodizing yog txheej txheem kev kho hluav taws xob electrochemical uas tsim cov yeeb yaj kiab oxide ntawm cov hlau los ntawm kev siv hluav taws xob rau cov electrolyte. Cov txheej txheem no tsuas yog siv rau txhuas thiab nws cov alloys, tab sis kuj tseem siv tau rau lwm cov hlau xws li magnesium thiab titanium. Thaum lub sij hawm anodizing, cov hlau ua raws li cov anode, thiab cov pa oxygen ions nyob rau hauv cov electrolyte react nrog cov hlau nto los tsim ib txheej oxide.

Cov qauv ntawm cov anodic oxide zaj duab xis feem ntau muaj ob txheej: txheej txheej tuab tuab ze rau cov hlau substrate thiab txheej ntxeem tau ntawm qhov chaw. The barrier layer is very thin but extremely dense, while the porous layer has a honeycomb structure with a porosity of 10-15%. Cov qauv tshwj xeeb no tso cai rau anodic oxide zaj duab xis nrog cov khoom tshwj xeeb, thaum tseem cuam tshuam rau cov hlau conductivity.

II. Direct Effects ntawm Anodizing ntawm Conductivity

1. Ua kom lub ntsej muag tiv taus

Anodized zaj duab xis yog qhov tseem ceeb ntawm cov hlau oxides, thiab lawv cov conductivity qis dua li ntawm cov hlau nws tus kheej. Aluminium oxide (Al₂O₃) cov yeeb yaj kiab muaj kev tiv thaiv siab heev, kwv yees li 10¹⁴-10¹⁵ Ω·cm, thaum lub zog ntawm cov ntshiab txhuas tsuas yog 2.65 × 10⁻⁶ Ω·cm. Qhov sib txawv tseem ceeb no txhais tau hais tias cov khoom siv hluav taws xob ntawm cov hlau yuav raug txo qis tom qab anodizing.

2. Kev sib raug zoo ntawm zaj duab xis Thickness thiab conductivity

Lub thickness ntawm cov yeeb yaj kiab anodized feem ntau yog los ntawm ob peb micrometers mus rau kaum ntawm micrometers, thiab cov yeeb yaj kiab thickness yog inversely proportional rau conductivity. Cov kev tshawb fawb tau pom tias thaum lub thickness ntawm cov yeeb yaj kiab anodized nce mus txog 10 μm, qhov kev tiv thaiv nto tuaj yeem nce los ntawm 6-8 qhov kev txiav txim ntawm qhov loj. Rau daim ntawv thov uas yuav tsum tau khaws cia conductivity, oxide zaj duab xis thickness feem ntau yog tswj nyob rau hauv qis qis (1-5 μm).

3. Kev cuam tshuam ntawm Porous Structure ntawm Kev faib tawm tam sim no

Txawm hais tias cov qauv ntxeem tau ntawm cov yeeb yaj kiab anodized ua rau thaj tsam ntawm qhov chaw, qhov tseeb cov kab hluav taws xob tau txo qis vim tias cov pores tau ntim nrog insulating oxide. Tam sim no tsuas yog ua tau nyob rau hauv lub unoxidized hlau substrate los yog los ntawm qhov tsis xws luag nyob rau hauv cov zaj duab xis txheej, uas ua rau ib tug tsis sib xws tam sim no tis.

III. Yam tseem ceeb cuam tshuam rau kev coj ua

1. Hom Electrolyte

Cov electrolytes sib txawv tsim cov oxide zaj duab xis sib txawv, uas ua rau muaj qhov sib txawv ntawm cov conductivity:

- Sulfuric acid anodizing: Ua ib zaj duab xis tuab dua, txo cov conductivity.

- Chromic acid anodizing: Tsim ib zaj duab xis thinner thiab denser, nrog kev cuam tshuam tsawg dua ntawm kev coj ua.

- Oxalic acid anodizing: tuaj yeem tsim cov yeeb yaj kiab ib nrab.

2. Txheej txheem Parameters

- Voltage: Cov hluav taws xob ntau dua ua rau cov yeeb yaj kiab tuab, nrog qhov txo qis hauv kev coj ua ntau dua.

- Qhov ceev tam sim no: cuam tshuam rau zaj duab xis loj hlob thiab qhov ntom ntom ntom ntom.

- Lub sij hawm ua: ncaj qha txiav txim siab zaj duab xis thickness.

- Kub: cuam tshuam rau zaj duab xis porosity thiab crystallinity.

3. Kev kho mob sealing

Sealing tom qab anodizing ntxiv txo cov conductivity. Cov dej kub sealing los yog txias sealing yuav thaiv lub qhov hws ntawm cov ntxeem tau txheej, insulating tag nrho cov muaj peev xwm txwv conductive raws.

IV. Cov kev cuam tshuam ntawm kev hloov pauv kev coj ua

1. Kev siv hluav taws xob txuas

Anodizing yuav tsum tau ceev faj ntawm cov ntsiab lus sib txuas uas yuav tsum tau tswj xyuas, xws li cov khoom siv hauv av thiab cov kev sib cuag hauv cov khoom siv hluav taws xob. Hauv zos oxidation los yog tom qab- kev kho kom tshem tawm cov oxide zaj duab xis feem ntau yog siv los xyuas kom meej conductivity.

2. Electromagnetic Shielding Performance

Anodizing txo cov electromagnetic shielding zoo ntawm cov hlau vim hais tias cov oxide zaj duab xis tsis muaj lub electromagnetic yoj kev muaj peev xwm ntawm cov hlau. Rau cov ntawv thov uas xav tau electromagnetic compatibility, qhov sib npaug yuav tsum raug ntaus ntawm kev tiv thaiv corrosion thiab shielding kev ua tau zoo.

3. Cov Hluav Taws Xob Hluav Taws Xob Dissipation

Tag nrho cov chaw anodized yog qhov ua rau muaj hluav taws xob zoo li qub, uas ua rau ESD (electrostatic paug) teeb meem. Hauv kev lag luam hluav taws xob, feem ntau siv cov txheej txheem oxidation lossis conductive anodizing los daws qhov teeb meem no.

V. Cov txheej txheem los txhim kho kev coj ua

1. Conductive Anodizing

Los ntawm tshwj xeeb electrolyte formulations (xws li ntxiv cov organic acids) los yog cov txheej txheem tswj, oxide films nrog ib tug tej yam℃ntawm conductivity yuav generated. Qhov kev tiv thaiv ntawm cov yeeb yaj kiab no tuaj yeem raug txo mus rau 10⁴-10⁶ Ω·cm, ua tau raws li qee qhov kev cai tiv thaiv.

2. Localized Anodizing

Siv cov txheej txheem npog ntsej muag lossis cov txheej txheem xaiv, anodizing tsuas yog ua nyob rau hauv tsis yog -cov khoom siv hluav taws xob, khaws cia cov xim hlau ntawm cov khoom tseem ceeb.

3. Tshaj tawm - kev ua haujlwm

- Kev kho Laser: Tshem tawm cov oxide zaj duab xis hauv cov chaw tshwj xeeb uas siv lub laser.

- Chemical etching: Xaiv cov tshuaj yaj yeeb oxide.

- Txheej txheej: tso cov khoom siv hluav taws xob xws li npib tsib xee lossis tooj liab mus rau oxide zaj duab xis nto.

4. Alloy xaiv

Qee qhov txhuas alloys (xws li alloys nrog cov ntsiab lus tooj liab siab) tuaj yeem khaws qee cov hlau hauv cov yeeb yaj kiab anodized, uas ua rau txo qis hauv conductivity.

VI. Conductivity Control nyob rau hauv daim ntawv thov tshwj xeeb

1. Hluav taws xob cua sov

Kev tuav cov khoom siv hluav taws xob ntawm lub dab dej kub kom ntseeg tau tias kev sib cuag zoo nrog cov nti yog qhov tseem ceeb, thaum tseem yuav tsum tau muaj qee theem ntawm oxide zaj duab xis tiv thaiv corrosion. Nyias- txheej anodizing (1-2 μm) lossis cov txheej txheem anodizing hauv zos feem ntau yog siv.

2. Cov khoom siv hluav taws xob zoo

Qee cov khoom siv hluav taws xob hauv thaj chaw aerospace siv micro-arc oxidation technology. Qhov tshwm sim oxide zaj duab xis muaj ib theem hlau, tswj qee qhov conductivity.

3. Antistatic Ntim

Los ntawm kev tswj cov txheej txheem anodizing tsis, cov ntaub ntawv antistatic nrog rau qhov chaw tiv taus ntawm 10⁶-10⁹ Ω tuaj yeem tau txais rau ntim cov khoom siv hluav taws xob.

VII. Xaus

Anodizing ho txo ​​cov conductivity ntawm hlau nto. Cov nyhuv no feem ntau tshwm sim los ntawm qhov siab tiv thaiv ntawm qhov tshwm sim oxide zaj duab xis. Hauv kev siv cov tswv yim, nws yog ib qho tsim nyog yuav tsum xaiv cov txheej txheem anodizing tsis zoo lossis txais yuav cov kev kho tshwj xeeb raws li cov khoom siv ua haujlwm los tswj cov qib ntawm kev txo qis thaum ua kom muaj kev tiv thaiv corrosion, hnav tsis kam, thiab lwm yam khoom. Los ntawm cov txheej txheem optimization thiab kev loj hlob ntawm cov tshiab ua technologies, qhov kev tsis sib haum xeeb ntawm conductivity thiab nto kho mob tam sim no yuav daws tau ntau yam, ua tau raws li cov khoom siv sib txawv ntawm cov khoom siv sib txawv.