iav thiab ceramic sealing

Nrog rau txoj kev loj hlob sai ntawm kev tshawb fawb thiab thev naus laus zis niaj hnub no, cov kev xav tau ntawm cov khoom siv engineering tshiab yog siab dua thiab siab dua hauv cov khoom siv thev naus laus zis xws li kev lag luam hluav taws xob, kev lag luam hluav taws xob nuclear, aerospace thiab kev sib txuas lus niaj hnub. Raws li peb txhua tus paub, cov ntaub ntawv engineering ceramics (tseem hu ua structural ceramics) tsim los ntawm cov thev naus laus zis niaj hnub yog cov khoom siv engineering tshiab los hloov kho rau kev txhim kho thiab siv cov cuab yeej siv niaj hnub no. Tam sim no, nws tau dhau los ua cov khoom siv engineering thib peb tom qab hlau thiab yas. Cov khoom siv no tsis yog tsuas yog muaj cov ntsiab lus siab melting, kub tsis kam, corrosion kuj, hnav tsis kam thiab lwm yam khoom tshwj xeeb, tab sis kuj muaj hluav taws xob tiv thaiv, siab zaus thiab hluav taws xob rwb thaiv tsev thiab lwm yam khoom siv hluav taws xob, nrog rau lub suab, lub teeb, cua sov, hluav taws xob. , sib nqus thiab lom, kev kho mob, kev tiv thaiv ib puag ncig thiab lwm yam khoom tshwj xeeb. Qhov no ua rau cov khoom siv ceramics tau siv dav hauv cov khoom siv hluav taws xob, microelectronics, optoelectronic cov ntaub ntawv thiab kev sib txuas lus niaj hnub, kev tswj tsis siv neeg thiab lwm yam. Obviously, nyob rau hauv txhua yam ntawm cov khoom siv hluav taws xob, lub sealing tshuab ntawm ceramics thiab lwm yam ntaub ntawv yuav tuav ib tug tseem ceeb heev txoj hauj lwm.

Kev sib khi ntawm iav thiab ceramic yog txheej txheem ntawm kev sib txuas iav thiab ceramic rau hauv ib qho qauv tsim los ntawm cov cuab yeej tsim nyog. Hauv lwm lo lus, cov iav thiab cov khoom siv ceramic siv cov thev naus laus zis zoo, kom ob qho khoom sib txawv ua ke rau hauv cov khoom siv sib txawv, thiab ua kom nws qhov kev ua tau zoo raws li qhov yuav tsum tau ua ntawm cov khoom siv.

Kev sib khi ntawm ceramic thiab iav tau tsim sai heev nyob rau xyoo tas los no. Ib qho ntawm cov haujlwm tseem ceeb tshaj plaws ntawm kev sib khi thev naus laus zis yog muab tus nqi qis rau kev tsim cov khoom siv ntau yam. Vim tias kev tsim cov ceramics yog txwv los ntawm cov khoom siv thiab cov khoom siv, nws yog ib qho tseem ceeb heev los tsim cov tshuab sealing zoo. Feem ntau cov ceramics, txawm tias nyob rau hauv qhov kub thiab txias, kuj qhia cov yam ntxwv ntawm nkig cov ntaub ntawv, yog li nws yog ib qho nyuaj heev los tsim complex zoo qhov chaw los ntawm deformation ntawm ntom ceramics. Hauv qee qhov kev npaj tsim kho, xws li cov txheej txheem thev naus laus zis thev naus laus zis thev naus laus zis, qee qhov ib feem tuaj yeem tsim los ntawm kev siv tshuab, tab sis nws nyuaj rau kev ua tiav ntau lawm vim muaj kev txwv ntawm tus nqi siab thiab kev ua haujlwm nyuaj. Txawm li cas los xij, porcelain sealing thev naus laus zis tuaj yeem txuas qhov tsis yooj yim rau hauv ntau cov duab, uas tsis tsuas yog txo cov nqi ua haujlwm, tab sis kuj txo cov nyiaj ua haujlwm. Lwm lub luag haujlwm tseem ceeb ntawm lub tshuab sealing yog los txhim kho kev ntseeg tau ntawm cov qauv ceramic. Ceramics yog cov ntaub ntawv nkig, uas yog nyob ntawm qhov tsis xws luag, Ua ntej cov duab complex tsim, nws yog ib qho yooj yim los soj ntsuam thiab xyuas qhov tsis xws luag ntawm cov qauv yooj yim, uas tuaj yeem txhim kho kev ntseeg tau ntawm qhov chaw.

Sealing txoj kev ntawm iav thiab ceramic

Tam sim no, muaj peb hom ceramic sealing txoj kev: hlau vuam, khoom theem diffusion vuam thiab oxide iav vuam (1) Active hlau vuam yog ib txoj kev vuam thiab sealing ncaj qha ntawm ceramic thiab iav nrog reactive hlau thiab solder. Lub npe hu ua active hlau yog hais txog Ti, Zr, HF thiab lwm yam. Lawv cov atomic hluav taws xob txheej tsis tau puv. Yog li ntawd, piv nrog rau lwm yam hlau, nws muaj ntau dua liveliness. Cov hlau no muaj kev sib raug zoo rau oxides, silicates thiab lwm yam khoom, thiab yooj yim tshaj plaws oxidized nyob rau hauv tej yam kev mob, yog li lawv hu ua active hlau. Nyob rau tib lub sijhawm, cov hlau no thiab Cu, Ni, AgCu, Ag, thiab lwm yam tsim intermetallic ntawm qhov kub thiab txias qis dua lawv cov ntsiab lus melting, thiab cov intermetallic no tuaj yeem sib txuas zoo rau cov iav thiab ceramics ntawm qhov kub thiab txias. Yog li ntawd, kev sib khi ntawm iav thiab ceramic tuaj yeem ua tiav los ntawm kev siv cov kub kub thiab cov khoom tawg zoo sib xws.

(2) Peripheral theem diffusion sealing yog ib txoj hauv kev kom paub txog tag nrho cov kev sib khi nyob rau hauv qee qhov siab thiab qhov kub thiab txias thaum ob daim ntawm cov ntaub ntawv sib txuas sib txuas thiab tsim cov yas deformation, kom lawv cov atoms nthuav dav thiab cog lus nrog ib leeg.

(3) Iav solder yog siv los kaw cov iav thiab cov porcelain nqaij.

Sealing ntawm solder iav

(1) Cov iav, ceramic thiab solder iav yuav tsum raug xaiv los ua cov khoom sib khi ua ntej, thiab cov ko taw nthuav dav ntawm peb yuav tsum sib phim, uas yog qhov tseem ceeb rau kev ua tiav ntawm kev sib khi. Lwm qhov tseem ceeb yog tias cov iav uas tau xaiv yuav tsum tau ntub dej zoo nrog iav thiab ceramic thaum lub sij hawm sib khi, thiab cov khoom ntim (iav thiab ceramic) yuav tsum tsis txhob muaj thermal deformation, Thaum kawg, txhua qhov chaw tom qab sealing yuav tsum muaj qee lub zog.

(2) Kev ua haujlwm zoo ntawm cov khoom: lub sealing kawg ntawm lub ntsej muag ntawm cov iav qhov chaw, cov khoom siv ceramic thiab cov iav siv lead ua yuav tsum muaj qhov flatness siab dua, txwv tsis pub lub thickness ntawm cov iav txheej tsis zoo ib yam, uas yuav ua rau kom muaj kev sib khi kev nyuaj siab, thiab txawm tias txhuas. mus rau tawg ntawm porcelain qhov chaw.

(3) Cov binder ntawm cov iav iav hmoov tuaj yeem yog dej ntshiab lossis lwm cov kuab tshuaj organic. Thaum cov kuab tshuaj organic siv los ua cov ntawv khi, thaum cov txheej txheem sealing tsis raug xaiv kom raug, cov pa roj carbon yuav raug txo thiab cov iav siv lead ua yuav dub. Ntxiv mus, thaum sealing, cov organic hnyav yuav decomposed, thiab cov pa phem rau tib neeg noj qab haus huv yuav raug tso tawm. Yog li ntawd, xaiv cov dej ntshiab kom ntau li ntau tau.

(4) Lub thickness ntawm siab solder iav txheej yog feem ntau 30 ~ 50um. Yog tias lub siab me dhau lawm, yog tias lub iav txheej yog tuab heev, lub zog sealing yuav raug txo, thiab txawm tias Lake roj yuav raug tsim. Vim tias lub ntsej muag lub ntsej muag tsis tuaj yeem yog lub dav hlau zoo tshaj plaws, lub siab loj heev, cov txheeb ze tuab ntawm cov iav txheej sib txawv heev, uas tseem yuav ua rau muaj kev ntxhov siab ntxiv, thiab tseem ua rau tawg.

(5) Cov kev qhia tshwj xeeb ntawm cov cua sov ua kom sov tau txais yuav rau crystallization sealing, uas muaj ob lub hom phiaj: ib qho yog los tiv thaiv cov npuas hauv cov iav txheej uas tshwm sim los ntawm kev loj hlob sai ntawm noo noo nyob rau hauv thawj theem ntawm cua sov, thiab lwm yam. yog kom tsis txhob muaj qhov tawg ntawm tag nrho cov khoom thiab cov iav vim qhov tsis sib xws ntawm qhov kub thiab txias vim qhov cua kub sai sai thaum qhov loj ntawm tag nrho cov khoom thiab cov iav daim iav loj. Raws li qhov kub nce mus rau qhov pib kub ntawm lub solder, lub iav solder pib tawg. Kub sealing siab, lub sij hawm ntev sealing, thiab tus nqi ntawm cov khoom tawg tawm yog qhov zoo rau kev txhim kho lub zog sealing, tab sis cov huab cua nruj yuav txo qis. Lub sealing kub yog tsawg, lub sij hawm sealing luv luv, lub iav muaj pes tsawg leeg yog loj, cov roj nruj zoo, tab sis lub sealing zog txo, Tsis tas li ntawd, tus naj npawb ntawm cov analytes kuj cuam tshuam rau linear expansion coefficient ntawm cov iav solder. Yog li ntawd, txhawm rau ua kom lub sealing zoo, ntxiv rau kev xaiv cov iav uas tsim nyog, qhov tsim nyog sealing specification thiab sealing txheej txheem yuav tsum tau txiav txim raws li lub ntsej muag xeem. Nyob rau hauv cov txheej txheem ntawm iav thiab ceramic sealing, lub sealing specification kuj yuav tsum tau kho raws li tus yam ntxwv ntawm txawv solder iav.