Ichi chinyorwa chinovhara mikana yekushandiswa kweTeflon yakakwirira-tembiricha jira mune inobuda yakasimba-state bhatiri indasitiri. Nharaunda ina: Dry electrode / electrolyte membrane kugadzira - high-temperature anti-stick conveyor mabhandi ekupisa roll pressing (150-250 ° C) zvichiita kuti kupenengura kwakatsetseka kwemafirimu anozvitsigira; inopisa roller inovhara layer semi-permanent anti-stick layer; inochengetedza firimu yakatsetseka pamusoro, inoderedza kukanganisa, inovandudza goho. Kusunungura liners uye cushioning pads yekupisa-kudzvanya densification - sulfide / polymer mabhatiri anoda inopisa isostatic / flat pressing (100-300 ° C, makumi eMPa); PTFE jira rakaiswa pakati pebhatiri stack uye mold inodzivirira kunamatira, inogonesa yunifomu yekumanikidza kugovera kuburikidza ne micro-elasticity, inodzivirira kupisa mahwendefa.

Ichi chinyorwa chinoongorora shanduko kuPTFE molecular cheni pasi pe ultraviolet irradiation. Main-chain scission uye molecular weight reduction: UV (254nm, 471 kJ/mol) inotyora CC bond (347 kJ/mol), zvichikonzera homolysis, inogadzira CF₂-yakaguma mahara radicals, inopinza mamorekuru uremu kudonha, kurasikirwa kwekuoma uye kureba. Free radical reaction pathways: muokisijeni, peroxy radicals fomu, kurongazve kune acyl fluoride (-COF) uye carboxylic acid (-COOH) mapoka ekupedzisira, kusunungura COF₂ uye CO₂ (COF₂ hydrolyzes kuHF); mumhepo inert, kusaenzana/kubatanidzwa kunotonga, asi cheni scission inoramba ichinyanya.

Ichi chinyorwa chinovhara mashandisirwo eTeflon yakakwirira-tembiricha jira mune spacesuit thermal insulation layer. Material essence: PTFE-yakavharidzirwa fiberglass jira, rinozivikanwa muchadenga seBeta jira, kusanganisa machira kuchinjika nePTFE yakanyanyisa-environment inertness. Basa: yekunze dhizaini yeThermal Micrometeoroid Nguo (TMG) mune yekuwedzera yekufamba mayuniti, yakatarisana yakananga vacuum, yakanyanyisa tembiricha musiyano, uye micrometeoroids seyekutanga yemuviri / yekupisa chipingamupinyi yemafirimu emukati ane aluminium. Kunyanya kudzivirira kwezvakatipoteredza: inomira -200 ° C kusvika +260 ° C range (yakatarisana nezuva> 120 ° C kusvika kumumvuri -160 ° C); nzvimbo yakachena inoratidza mwaranzi yezuva; inodzivirira isina kusimba aluminium polyimide mafirimu kubva kune mavanga uye misodzi. Kubatsira kwekufamba: kukwenya kwakaderera PTFE pamusoro inodzivirira kusungirirana kwehuputi panguva yekukotama kwakabatana, kuve nechokwadi cheEVA kuchinjika.

Ichi chinyorwa chinovhara mabhenefiti ekushandisa kweTeflon yakakwirira-tembiricha jira mu lithium bhatiri electrode kuomesa. Inoshandiswa semabhandi ekutakurisa kana ma oven liner, kugadzirisa matambudziko matatu makuru: slurry adhesion, corrosion, uye electrode scratching. Nzvimbo ina dzakanakira: Electrode kunaka uye goho - anti-stick zvivakwa zvinodzivirira PVDF binder adhesion zvichiita kuti zvive nyore kupepeta; yunifomu thermal conductivity pa 100-140 ° C inodzivirira kuputika / kupisa; nzvimbo yakatsetseka inobvisa zvikwambo uye kubuda hupfu; Kugara uye kugadzikana kwekushanda - makemikari anopokana neNMP solvent uye electrolyte vapors pasina kuzvimba / kuchembera; kusimba kwepamusoro uye kugadzikana kwedimensional kubva kune fiberglass substrate yekunyatsomira; kucheneswa kuri nyore nekusarira zvishoma zvichienzaniswa nesimbi mesh mabhandi.

Ichi chinyorwa chinovhara yakajairika mutsara wekumhanyisa renji yePTFE yakakwirira-tembiricha yejira impregnation yekugadzira mutsara. Kumhanya kwakajairika: 2-15 m / min, yakagadzikana yekushanda yakaenzana 3-8 m / min, micheka yakaonda / mitsetse yakakwira kusvika 10-15 m / min. Zvipingamupinyi kubva pakupinzwa kwemukati: jira rinofanira kunge rakazara zvakakwana nePTFE emulsion mufiber bundle mukati - yakanyanya kumhanya inokonzera kusakwana kupindira, resin nzara uye yakaoma fibers; emulsion viscosity, solids concentration, machira akarukwa density zvese zvinodzikisira mwero wekupinda, zvinoda kumhanya kunononoka kumachira akakora/akakora. Kupfekedza kunopfuura: akawanda anopfuura (2-6+) anodiwa kune dense chirema-chisina coating; yekutanga kupfuura inononoka yekumisikidza, kunotevera kupasa kunogona kuwedzerwa zvine mwero.

Ichi chinyorwa chinovhara zvesilica zvemukati uye mashandisirwo emhando yepamusoro-silica girazi fiber jira. Silica content specification: core indicator is SiO₂ ≥96% (standard 96-98%, premium grade> 99% kuburikidza neacid leaching uye sintering, ichiswedera yakachena quartz fiber). Kugadzira: E-girazi jira rinopinda inopisa acid leaching yekunyungudutsa zvisiri-silica components (boron oxide, sodium oxide), kugadzira porous high-silica skeleton, yobva yanyudzwa kuti densification. Core zvakanakira: kuenderera sevhisi pa 900 ° C mune oxidizing atmospheres, kwenguva pfupi pamusoro pe1200 ° C, kupfava padyo pedyo ne1700 ° C; kugadzikana kwemakemikari kunopesana neakawanda acids / alkali kunze kweHF uye inopisa phosphoric acid; yakaderera dielectric inogara uye yakatsiga insulation pakupisa kwakanyanya.

Ichi chinyorwa chinovhara chiitiko che delamination cheTeflon yakakwirira-tembiricha jira. Delamination inoreva kupatsanurwa uye kupepeta pakati pepamusoro PTFE yekupotera uye yemukati fiberglass base jira kana pakati pematanho ekuputira akawanda. Kuratidzwa kwekuona: blistering / bulging (yakasimudzwa mabhubhu ane gollow kunzwa) sezviratidzo zvekutanga; interlayer peeling ine coating inobviswa zviri nyore mumasheets anoratidza white fiberglass; kuchena kwenzvimbo kunoteverwa nekuputika mushure mekupisa/kukweshana. Zvikonzero zvikuru: Thermal stress damage - kusiyanisa kupisa kwekuwedzera coefficients pakati pePTFE uye fiberglass kunogadzira kushushikana kwemukati, kukurumidza kupisa / kutonhora kunokonzera detachment; Kukanganisa kwemhando yekugadzira - kusakwana kwefiberglass pamusoro pekurapa, kushata kwePTFE kuisirwa, kusakwana sintering zvichikonzera kusimba kwekubatana kwechiso.

Ichi chinyorwa chinotsanangura microstructural maitiro eTeflon high-temperature jira. Substrate skeleton: glass fiber weaving texture mu plain/twill weaves ane high porosity (micron-scale pores mukati me fiber bundles uye at warp-weft nodes) inopa nzvimbo yePTFE impregnation. Coating morphology: yakazara impregnation encapsulation inogadzira 'yakasimbiswa kongiri' chimiro uko magirazi fibers ari kusimbisa chikamu, PTFE inoenderera matrix; pamusoro nodular microstructure yemanodule (particles) akabatanidzwa nefibrils yakanaka yakagadzirwa panguva yekupisa; inoenderera mberi dense ganda layer (akawanda kusvika kumakumi emakironi akakora) yePTFE yakachena sekiyi chipingamupinyi chemakemikari inertness, isiri-tsvimbo, uye magetsi ekudzivirira.

Ichi chinyorwa chinoongorora shanduko yemaitiro muPTFE high-temperature jira panguva yekukwegura. Zvikamu zvina: PTFE coating microstructure — molecular chain scission and oxidation (carbonyl/carboxyl group formation), crystallinity change (kusimuka kwekutanga ndokudonha), micro-crack uye pinhole formation, pamusoro peupfu; Girazi fiber substrate uye interface - saizi / coupling agent kuora kunokonzera kurasikirwa kwe bonding, interfacial debonding uye delamination (blistering, white areas), glass fiber network erosion and embrittlement, alkali metal oxide precipitation inokonzera kushungurudzika kuora; Macroscopic chimiro uye chitarisiko - shanduko yeruvara (chena → beige → brown → dema), shrinkage deformation uye kupeta, kukwenya kwepamusoro uye kurasikirwa kwekupenya, kuita upfu pakubata, kurasikirwa zvachose kwekushanduka. Essence yekuchembera: kufambira mberi kwe 'coating degradation → interface kutadza → substrate degradation.'

Ichi chinyorwa chinovhara maitiro ekudzora sintering nguva yePTFE yakakwirira-tembiricha machira. Core control method: line speed kugadzirisa. Sintering nguva = inoshanda kupisa chikamu kureba ÷ jira rekufamba kumhanya. Inoshanda sintering pachikumbaridzo i350°C (pamusoro peiyi tembiricha inoverengwa senguva yekupisa). Multi-zone tembiricha kugovera: preheating (100-250 ° C), sintering (360-395 ° C), yakakwirira-tembiricha kugadzika (380-390 ° C), kutonhora (pasi 300 ° C). Reference nguva pa 380-390 ° C: lightweight (0.08-0.13mm) 30-60 seconds; chiyero (0.18-0.25mm) 1.5-3 maminitsi; inorema (≥0.35mm) 3-5 maminitsi. Kuzivikanwa uye kugadzirisa: pasi-sintering (yakaderera simba, kuputika kwehupfu, micro-cracks) → kuderedza kukurumidza kuwedzera nguva; over-sintering (yellow, brittleness, white fumes) → wedzera kukurumidza kupfupisa pekugara. Tembiricha-nguva yakaenzana inobvumira kutonhora kwepamusoro-soro kumhanyisa (395-405 ° C, masekonzi) kana kudzika-kunonoka kutonhora (360-375 ° C, 5-8 maminetsi).