(Kovar kusvika kuAlumina ChikamuProduce byWintrustek)
I. Mhedziso yeKovar
Kovar isimbi-nickel-cobalt-based expansion alloy ine chinhu chikuru ndechekuti iyo yekupisa yekuwedzera coefficient inofanana neyemamwe magirazi akaomarara uye ceramics (senge alumina) mukati meimwe tembiricha renji. Ichi chimiro chinoita kuti ive yakakosha yekuisa chisimbiso mumagetsi kurongedza, aerospace, lasers, uye mamwe maindasitiri. Inowanzo shandiswa kugadzira zvinhu zvesimbi zvekuvhara hermetic negirazi kana ceramics.
Iro zita rekuti "4J" yearoyi chaiwo pasi peChina yenyika chiyero (GB) inomiririra alloys ane ekuwedzera maitiro "kuswedera" (J) imwe kukosha.
II. Ongororo Yakadzama yeMatatu eKovar Magiredhi
Kufanana: Vese vari vatatu vakavakirwa paFe-Ni-Co uye vane zvivakwa zvekuwedzera zvakafanana negirazi rakaomarara uye ceramics. Thermal yekuwedzera macurves, tembiricha yeCurie, uye mashandiro emuchina zvinosiyana zvakanyanya semhedzisiro yekuchinja kudiki kwekuumbwa.
1. 4J29 (the most classic and widely used Kovar)
MaumbirwoFe-29Ni-17Co, ine zvidiki zvekuwedzera zve deoxidizing zvinhu senge manganese nesilicon.
Kuwedzera Hunhu: Avhareji yemutsara wekuwedzera coefficient yakanyatsoenderana neDM-308 molybdenum-group girazi uye 92-96% alumina ceramics mhiri kwe20-450°C renji.
Key Parameters:
Tembiricha yeCurie: Inosvika 430°C (inorasikirwa neferromagnetic properties pamusoro petembiricha iyi).
Matching Materials: High-alumina ceramics, molybdenum-group magirazi.
Kurapa Kwepamusoro: Kazhinji kunoda nickel kana goridhe plating kuti uwedzere kusimba uye kusaita ngura.
Zvishandiso Zvikuru: Microwave tubes, lasers, integrated circuit housings, high-reliability relays, aerospace sealed connectors.
2. 4J33 uye 4J34 (Kovar Yakavandudzwa)
Aya ma alloys akasiyana akagadziridzwa kugadzirisa kukanganisa kwe4J29 (senge yakakwira yakaderera-tembiricha yekuwedzera coefficients), ine yakakwirira Curie tembiricha.
Misiyano Yekuumbwa:
4J33: Fe-33Ni-14Co (reduced cobalt, increased nickel).
4J34: Fe-31Ni-15Co (composition intermediate between the two).
Kuwedzera Hunhu:Patembiricha yemumba kusvika pa300 ° C, iyo coefficient yekuwedzera yakadzikira zvishoma pane 4J29, ichipa kuenderana kurinani nemamwe magirazi ehunyanzvi kana ceramics.
Kubatsira Kwakakosha-Kupisa Kwepamusoro KweCurie:
4J29: ~430°C
4J33: ~500°C
4J34: ~480°C
KukoshaIyo yakakwira Curie tembiricha inoita kuti zvinhu zvirambe zvisiri-magineti patembiricha yakakwira yekushanda, kudzivirira kukanganiswa kwemagineti neakakwira-frequency, yakakwirira-chaiyo zviridzwa.
Sarudzo yeApplication: Inokodzera nzvimbo dzine tembiricha yepamusoro kana kuti maapplication anonzwa magineti, kana kuti zvakasarudzwa zvichibva pamiedzo yekufananidza nekavhavha ine zvinhu zvekunamisa.
III. Yakakosha Yakanakira Brazing Kovar neAlumina Ceramics
Gasi-yakasimba hermetic sealing yeKovar uye alumina ceramics kuburikidza nebrazing tekinoroji yakakosha mukurongedza kwemazuva ano emagetsi, ine zvinotevera zvakakosha:
1. Exceptional Thermal Expansion Matching (Yakakosha Yakanakira)
Pakutonhodza kubva kubrazing kusvika kune tembiricha yekamuri, iwowo mazinga ekumisikidza ezvese zviri zviviri zvinoderedza zvakanyanya kusara kwekupisa kwekushushikana pajoinhi. Izvi zvinobudirira kubvisa ceramic kuputika uye brazing seam fractures, zvichikonzera kuvimbika kwakanyanya.
2. Kuwana Kusimba KweGasi Yakanyanya
Helium leak rates mumasisitimu akakura anowanzo kuwira pasi pe1 × 10⁻⁸ Pa·m³/s yezvikamu zvakavharwa, zvinonyatso kuparadzanisa hunyoro hwekunze uye oxygen. Izvi zvinosangana nekuvimbika kwakasimba zvinodiwa zveaerospace, mauto, uye zvimwe zvinodikanwa zvakanyanya.
3. Yepamusoro Mechanical Simba uye Kurongeka Kwemaitiro
Kovar provides yakasimba mekiniki rutsigiro uye kuoma, nepo alumina ceramics inopa yakanakisa insulation uye kuoma. Brazing zvinhu izvi zvinoguma mune yakasimba composite chimiro chine zvese zvinodzivirira uye zvinoshanda maficha.
4. Maitiro eVakuru uye Kuvimbika Kwepamusoro
Cheni inopindirana yakagadzirwa, iyo inosanganisira ceramic metallization (molybdenum-manganese maitiro), nickel plating, kusangana neKovar zvikamu, uye vacuum / inodzivirira nharaunda brazing. Iyo nzira inodzoreka zvakanyanya, yakakodzera kugadzirwa kwehuwandu, uye inoburitsa goho repamusoro nemhando inowirirana.
IV. Summary Kuenzanisa uye Sarudzo Mazano
Hunhu | 4J29 | 4J33 | 4J34 | Iwo akakosha mabhenefiti ebrazing nealumina ceramic |
Core Features | Yechinyakare uye inoshanda zvakasiyana, ichipa yakanakisa mutengo-kuita reshiyo | Yakakwira Curie poindi, yakadzikira zvishoma-yekuwedzera tembiricha | Performance Trade-offs | 1. Kunyatsoenderana kwekuwedzera kwekushisa |
Optimal Matching | 92-96% Al2O3 ceramics | Chaiyo girazi/ceramic, isina kukodzera kune magineti minda | Chaiyo girazi/ceramic | 2. Kunyanya kuderera kwakasara kunetseka |
Curie tembiricha | ~430°C | ~500°C | ~480°C | 3. High airtightness rating |
Sarudzo Mazano | Iyo yakasarudzika sarudzo yekuisa chisimbiso yakawanda yakajairwa alumina ceramics | Yakakwira tembiricha yekushanda, magnetic-sensitive, yakakosha yekufananidza zvinodiwa | Kunyanya kupisa kwekuwedzera kunoenderana nezvinodiwa | 4. Superior mechanical simba uye kuvimbika |
Yakakura kugadzira nzira | Highest | High | High | 5. Standardized process system |
Ⅴ. Mhedziso
Mukati memhuri yeKovar, 4J29 ndiyo yakajairwa uye yakakurudzirwa zvinhu zvekubhuroka yakakwira-alumina ceramics, ichipa mwero wakanaka wekuita, mutengo, uye kuvimbika. 4J33/34 kuvandudzwa kwekuita kune mamwe maapplication anoda hukuru hwekushanda tembiricha kana kuomarara kusiri magineti maitiro.Kupenya kweKovar nealuminium ceramics, iyo inotsigirwa nekuwedzera kwavo kupisa kwekuwedzera kuenzanirana, yave iyo indasitiri chiyero chehermetic packaging yepamusoro-yakavimbika yemagetsi uye optoelectronic zvikamu.
