Giraangiraha Shaabadda Ceramic-ka ee Alumina ee Nadiifka Sare leh ee Shaabadda Qolka Heerkulka Sare leh
Giraanta shaabadda dhoobada ah ee St.Cera waxaa loogu talagalay inay beddel u noqoto giraanta O-polymer-ka ee ku jirta deegaannada aadka u daran halkaas oo elastomers-ku ay burburaan. Waxaa laga sameeyay 99.8% alumina saafi ah oo sareysa (Al₂O₃), giraanta shaabadda adag waxaa loo isticmaalaa codsiyada shaabadda taagan - badanaa waxaa lagu lamaaniyaa gaaska birta jilicsan ama graphite - si loo bixiyo haynta faakuumka ama gaaska oo la isku halleyn karo heerkulka ilaa 800°C iyo deegaannada daran ee plasma ama kiimikada. Maaddadu waxay bixisaa gaas eber ah, xoog cadaadis sare leh (xoogga dabacsan ee salka ku jira 361 MPa), iyo firfircooni la'aan kiimiko ah (u adkaysta halogens, asiidhyo, iyo alkali marka laga reebo HF). Meelaha shaabadda ee si sax ah loo daboolay (fidsanaan ≤5 μm, qallafsanaanta dusha sare Ra ≤0.2 μm) waxay hubisaa in si adag loo taabto qaybaha birta ama dhoobada isku dhafan.
Tilmaamaha(oo ku salaysan 99.8% Al₂O₃):
| Hantida | Qiimaha |
| Alaab | 99.8% Alumina (Ceyri) |
| Cufnaanta | 3.93 g/cm³ |
| Nuugista Biyaha | 0% |
| Xoogga Dabacsanaan | 361 MPa |
| Xoogga Cadaadiska (la aasaasay) | >2000 MPa |
| Adkaanshaha Vickers | 16 GPA |
| Ballaarinta Kulaylka (25–1000°C) | 7.2 × 10⁻⁶/℃ |
| Heerkulka Hawlgalka ugu Badan | 800°C (hawada), 1600°C (aan shaqayn) |
| Dhammaystirka Dusha Sare (wejiga shaabadaysan) | Ra ≤0.2 μm (la dahaadhay) |
| Fidsanaan (25 mmkiiba) | ≤5 μm |
| Heerka Daadashada Helium | <1×10⁻¹⁰ Pa·m³/s (oo leh gasket ku habboon) |
Codsiyada:
- · Shaabadaysanayaasha qolka habka semiconductor-ka (CVD, PVD, etch)
- · Shaabadaha albaabka foornada heerkulka sare leh
- · Flanges-ka quudinta faakuumka
- · Xidhitaanka marinnada kiimikada ee fal-galiyaha
Habka Wax Soo Saarka:
Riixitaanka Isostatic → sintering heerkul ah 1600°C → laba-dhinac oo sax ah si loo gaaro wejiyo shaabadaysan oo aad u siman oo siman → godadka geeska → nadiifinta ultrasonic. Giraan kasta waxaa lagu tijaabiyay 100% daadashada iyadoo lagu ogaanayo daadashada helium oo leh gasket bir ah oo caadi ah.
Xakamaynta Tayada:
- · Hubinta cabbirka CMM (ID, OD, dhumuc, isbarbardhig)
- · Cabbiraha dusha sare ee Ra iyo hirarka
- · Cabbiraadda fidsanaanta iyadoo la adeegsanayo guri fidsan oo indhaha ah
- · Tijaabada daadinta Helium (habka cadaadiska gadaal-gadaal)
Faa'iidooyinka ka badan faraantiga O-ga Polymer-ka:
- U adkaysta 800°C vs. <300°C ee FFKM
- · Hawo la'aan gaas — ma jirto wasakhayn deegaanka faakuumka
- · U adkaysta dhammaan kiimikooyinka plasma-da (fluorine, chlorine, oksijiin)
- · Ma jiro isku-soo-ururin ama qaab-dhismeed joogto ah
- · Cimri adeeg aan xadidnayn oo jawi nadiif ah ku jira
Xaddidaadaha (Faallooyinka Muhiimka ah):
- · Ma aha O-ring— waa giraan dhoobo adag oo u baahan gasket jilicsan (naxaas, aluminium, ama garaafit) si loo xidho.
- · Ma qaabilo dhaqdhaqaaqa firfircoon ama qaab-dhismeedka flange-ka weyn.
- · Qiimaha bilowga ah oo ka sarreeya faraantiga O-ring-ka polymer-ka, laakiin cimri dheer wuxuu yareeyaa kharashka lahaanshaha.
- · Jaban — si taxaddar leh u qabso; iska ilaali saameynta barta ama cadaadiska foorarsiga.
Fiiro gaar ah:Xogta kor ku xusan waxay si adag u raacaysaa jadwalka hantida Al₂O₃ ee la bixiyay. Ma jirin xog ku saabsan agabka elastomeric-ka. Badeecadani waa giraan shaabadaysan oo aan isbeddelin, maaha giraan O-ring ah oo elastomeric ah. Fadlan xaqiiji in tani ay buuxinayso shuruudahaaga codsiga.
