Hollow iav microspheres yog cov txheej txheem tshwj xeeb iav microspheres, uas yog tshwj xeeb tshaj yog cov yam ntxwv ntawm qis dua thiab thermal conductivity tsis zoo dua iav microspheres. Nws yog ib yam tshiab ntawm micron-scale lub teeb yuag khoom tsim nyob rau hauv 1950s thiab 1960s. Nws lub ntsiab tivthaiv yog borosilicate, nrog ib tug dav particle loj ntawm 10 ~ 250μm thiab phab ntsa thickness ntawm 1 ~ 2μm; hollow iav hlaws muaj Nws muaj cov yam ntxwv ntawm siab compressive zog, siab melting point, siab resistivity, thiab thermal conductivity me me thiab thermal shrinkage coefficient. Nws yog lub npe hu ua "qhov chaw hnub nyoog khoom" nyob rau hauv lub xyoo pua 21st.Hollow iav microspheres muaj qhov pom tseeb qhov hnyav txo thiab lub suab rwb thaiv tsev thiab thermal rwb thaiv tsev cuam tshuam, yog li cov khoom muaj kev ua haujlwm zoo los tiv thaiv kev ua haujlwm thiab rov ua haujlwm dua, thiab tau siv dav hauv cov ntaub ntawv sib xyaw xws li iav fiber reinforced yas, dag marble, dag agate, zoo li hauv petroleum kev lag luam, aerospace thiab aerospace kev lag luam. , tshiab tsheb ciav hlau ceev ceev, tsheb thiab nkoj, thermal rwb thaiv tsev txheej thiab lwm yam kev lag luam tau zoo txhawb kev loj hlob ntawm kuv lub teb chaws txoj kev tshawb fawb thiab thev naus laus zis. Txhawm rau ua kom tau raws li qhov yuav tsum tau muaj ntawm dielectric tsawg, tsis tshua muaj poob thiab lub teeb yuag ntawm 5G cov ntaub ntawv sib txuas lus, hollow iav microspheres kuj ua lub luag haujlwm tseem ceeb vim lawv cov nqi qis thiab kev ua haujlwm zoo.
1 – Cov khoom xyaw
Tshuaj muaj pes tsawg leeg ntawm hollow iav microspheres (mass ratio)
SiO2: 50% -90%, Al2O3: 10% -50%, K2O: 5% -10%, CaO: 1% -10%, B2O3: 0-12%
2- Nta
xim dawb huv
Nws tuaj yeem siv dav hauv txhua yam khoom uas muaj qhov xav tau ntawm cov tsos thiab xim.
3- lub teeb ceev
Qhov ceev ntawm hollow iav microspheres yog hais txog ib feem kaum ntawm qhov ntom ntawm cov khoom siv ib txwm siv. Tom qab sau, lub hauv paus hnyav ntawm cov khoom tuaj yeem txo qis, ntau cov resins tuaj yeem hloov tau thiab txuag tau, thiab cov nqi khoom tuaj yeem txo.
4- Lipophilicity
Hollow iav microspheres yog ib qho yooj yim rau ntub thiab tawg, thiab tuaj yeem sau rau hauv feem ntau cov thermosetting thermoplastic resins, xws li polyester, epoxy resin, polyurethane, thiab lwm yam.
5-Liquidity zoo
Txij li thaum hollow iav microspheres yog me me spheres, lawv muaj fluidity zoo dua nyob rau hauv cov kua resins tshaj flake, koob los yog tsis xwm yeem fillers, yog li lawv muaj zoo heev pwm filling kev ua tau zoo. Qhov tseem ceeb tshaj, cov microbeads me me yog isotropic, yog li tsis muaj qhov tsis zoo ntawm qhov tsis sib xws ntawm qhov sib txawv ntawm qhov sib txawv vim yog kev taw qhia, uas ua kom qhov kev ruaj ntseg ntawm cov khoom thiab yuav tsis warp.
6- Thermal thiab suab rwb thaiv tsev
Sab hauv ntawm hollow iav microspheres yog cov roj nyias, yog li nws muaj cov yam ntxwv ntawm lub suab rwb thaiv tsev thiab rwb thaiv tsev kub, thiab nws yog ib qho zoo heev muab tub lim rau ntau yam thermal rwb thaiv tsev thiab suab rwb thaiv tsev khoom. Cov khoom insulating ntawm hollow iav microspheres kuj tseem siv tau los tiv thaiv cov khoom los ntawm thermal shock tshwm sim los ntawm kev hloov ntawm cov cua kub ceev thiab ceev txias txias. Siab tshwj xeeb tsis kam thiab tsis tshua muaj dej nqus dej ua rau nws siv dav hauv kev tsim cov khoom siv hluav taws xob cable.
7- Kev nqus roj tsawg
Cov khoom ntawm tus kheej txiav txim siab tias nws muaj qhov tsawg tshaj plaws ntawm thaj chaw tshwj xeeb thiab tsis tshua muaj roj nqus. Thaum siv cov txheej txheem, tus nqi ntawm cov resin tuaj yeem txo qis heev, thiab cov viscosity yuav tsis nce ntau txawm tias nyob rau hauv qhov kev xav tau ntawm cov nyiaj ntxiv, uas zoo heev txhim kho kev tsim khoom thiab kev ua haujlwm. Ua kom ntau lawm efficiency los ntawm 10% mus rau 20%.
8- Tsawg dielectric tsis tu ncua
Tus nqi Dk ntawm hollow iav microspheres yog 1.2 ~ 2.2 (100MHz), uas tuaj yeem txhim kho cov khoom siv hluav taws xob zoo.
Plastics rau hollow iav hlaws
(1) Rau kev hloov kho cov yas yas xws li nylon, PP, PBT, PC, POM, thiab lwm yam, nws tuaj yeem txhim kho fluidity, tshem tawm cov iav fiber ntau raug, kov yeej kev tsov rog, txhim kho cov nplaim hluav taws, txo cov iav fiber ntau, thiab txo cov khoom siv. tus nqi.
(2) Kev ntim khoom nrog PVC, PP, PE, thiab ua cov ntaub ntawv profiled, cov kav dej thiab daim hlau tuaj yeem ua rau cov khoom muaj qhov ruaj khov zoo, txhim kho kev nruj thiab kub ua haujlwm kub, txhim kho cov nqi ntawm cov khoom, txhim kho kev tsim khoom thiab txo cov nqi.
(3) Kev ntim khoom hauv PVC, PE thiab lwm cov cables thiab cov ntaub ntawv insulating tuaj yeem txhim kho cov khoom kub, rwb thaiv tsev, acid thiab alkali tsis kam thiab lwm yam khoom thiab kev ua haujlwm ntawm cov khoom, ua kom cov zis thiab txo cov nqi.
(4) Sau cov epoxy resin tooj liab clad phaj tuaj yeem txo cov viscosity ntawm cov resin, ua kom lub zog khoov, txhim kho nws lub cev thiab cov khoom siv, ua kom cov iav hloov pauv kub, txo qhov dielectric tas li, txo cov dej nqus, thiab txo tus nqi. .
(5) Sau nrog cov tsis muaj polyester tuaj yeem txo tus nqi shrinkage thiab ntxuav tus nqi ntawm cov khoom, txhim kho qhov hnav tsis kam thiab hardness, thiab muaj cov kab noj hniav tsawg dua thaum lamination thiab txheej. Nws yog siv rau FRP cov khoom, polishing log, cov cuab yeej, thiab lwm yam.
(6) Filling nrog silicone resin tuaj yeem txhim kho lub cev thiab cov khoom siv dag zog, thiab kev ntim ntau tuaj yeem txo tus nqi, uas yog cov khoom siv zoo tshaj plaws rau kev tsim cov pwm.
Post lub sij hawm: May-30-2022