Lilemong tsa morao tjena, conductivity ea mocheso oa lihlahisoa tsa rabara e fumane tlhokomelo e kholo.Lihlahisoa tsa rabara tse tsamaisang mocheso li sebelisoa haholo mafapheng a sefofane, sefofane, lisebelisoa tsa elektroniki le lisebelisoa tsa motlakase ho bapala karolo ea ho tsamaisa mocheso, ho kenya letsoho le ho monya ho ts'oenyeha.Ntlafatso ea conductivity ea mocheso e bohlokoa haholo bakeng sa lihlahisoa tsa rabara tse tsamaisang mocheso.Thepa e kopantsoeng ea rabara e lokiselitsoeng ke mochini o futhumatsang mocheso o ka fetisa mocheso hantle, e leng oa bohlokoa haholo ho densification le miniaturization ea lihlahisoa tsa elektroniki, hammoho le ntlafatso ea ts'epo ea bona le ho atolosoa ha bophelo ba bona ba ts'ebeletso.
Hona joale, lisebelisoa tsa rabara tse sebelisoang ka lithaere li hloka ho ba le litšoaneleho tsa moloko o fokolang oa mocheso le mocheso o phahameng oa mocheso.Ka lehlakoreng le leng, ts'ebetsong ea vulcanization ea mabili, ts'ebetso ea ho fetisa mocheso ea rabara e ntlafatsoa, tekanyo ea vulcanization e eketseha, 'me tšebeliso ea matla e fokotsehile;Mocheso o hlahisoang nakong ea ho khanna o fokotsa mocheso oa setopo 'me o fokotsa ho senyeha ha mabili a bakoang ke mocheso o feteletseng.Thermal conductivity ea thermally conductive rabara e khethoa haholo-holo ke matrix a rabara le li-filler tsa thermally conductive.Thermal conductivity ea ebang ke likaroloana kapa fibrous thermal conductive filler e molemo haholo ho feta ea matrix ea rabara.
Li-filler tse sebelisoang haholo ka thermally conductive ke lisebelisoa tse latelang:
1. Cubic Beta phase nano silicon carbide (SiC)
Nano-scale silicon carbide powder e etsa ho kopana le liketane tsa mocheso oa mocheso, 'me ho bonolo ho e kopanya le li-polymers, ho etsa skeleton ea Si-O-Si ketane ea mocheso e le mokhoa o ka sehloohong oa mocheso oa mocheso, o ntlafatsang haholo mocheso oa mocheso oa thepa e kopantsoeng ntle le ho fokotsa mocheso. composite material/ Boetsuwa ba metjhini.
Thermal conductivity ea silicon carbide epoxy composite material e eketseha ka ho eketseha ha palo ea silicon carbide, 'me nano-silicon carbide e ka fana ka thepa e kopantsoeng e ntle ea mocheso oa mocheso ha chelete e le tlaase.Matla a feto-fetohang le matla a ts'ebetso ea silicon carbide epoxy composite thepa e eketseha pele ebe e fokotseha ka ho eketseha ha palo ea silicon carbide.Phetoho ea bokaholimo ba silicon carbide e ka ntlafatsa ka mokhoa o atlehileng sebopeho sa mocheso le thepa ea mochini ea thepa e kopaneng.
Silicon carbide e na le lisebelisoa tse tsitsitseng tsa lik'hemik'hale, mocheso oa eona oa mocheso o molemo ho feta li-fillers tse ling tsa semiconductor, 'me mocheso oa eona oa mocheso o moholo ho feta oa tšepe mocheso oa kamore.Bafuputsi ba Univesithi ea Beijing ea Chemical Technology ba entse lipatlisiso mabapi le ho tsamaisoa ha mocheso oa alumina le silicon carbide e matlafatsang rabara ea silicone.Liphetho li bontša hore conductivity ea mocheso oa rabara ea silicone e eketseha ha palo ea silicon carbide e ntse e eketseha;ha palo ea silicon carbide e lekana, mocheso oa mocheso oa rabara e nyenyane ea silicone carbide e matlafalitsoeng e kholo ho feta ea boholo ba karoloana e kholo ea silicon carbide e matlafalitsoeng ka silicone rabara;Thermal conductivity ea rabara ea silicon e matlafalitsoeng ka silicon carbide e molemo ho feta ea alumina e matlafalitsoeng rabara ea silicon.Ha karo-karolelano ea boima ba alumina / silicon carbide e le 8/2 'me kakaretso e le likarolo tse 600, conductivity ea mocheso oa rabara ea silicon ke eona e molemo ka ho fetisisa.
Aluminium nitride ke kristale ea athomo 'me ke ea nitride ea daemane.E ka ba teng ka mokhoa o tsitsitseng mocheso o phahameng oa 2200 ℃.E na le conductivity e ntle ea mocheso le coefficient e tlase ea katoloso ea mocheso, e etsang hore e be thepa e ntle ea ho sisinyeha ha mocheso.Thermal conductivity ea aluminium nitride ke 320 W · (m·K) -1, e haufi le mocheso oa mocheso oa boron oxide le silicon carbide, 'me e feta makhetlo a 5 ho feta ea alumina.Bafuputsi ba tsoang Univesithing ea Saense le Theknoloji ea Qingdao ba ithutile ka mocheso oa mocheso oa aluminium nitride e matlafalitsoeng ke metsoako ea rabara ea EPDM.Liphello li bontša hore: ha palo ea aluminium nitride e ntse e eketseha, mocheso oa mocheso oa thepa ea motsoako oa eketseha;conductivity ea mocheso ea thepa e kopantsoeng ntle le aluminium nitride ke 0.26 W · (m·K) -1, ha palo ea nitride ea aluminium e eketseha ho ea likarolong tse 80, mocheso oa mocheso oa thepa ea motsoako o fihla ho 0.442 W · (m·K) -1, keketseho ea 70%.
Alumina ke mofuta oa li-inorganic filler tse sebetsang ka bongata, tse nang le conductivity e kholo ea mocheso, dielectric kamehla le ho hanyetsa ho apara hantle.E sebelisoa haholo ka thepa ea composite ea rabara.
Bafuputsi ba Univesithi ea Beijing ea Chemical Technology ba ile ba etsa liteko tsa mocheso oa nano-alumina/carbon nanotube/composites ea tlhaho ea rabara.Liphello li bontša hore tšebeliso e kopanetsoeng ea nano-alumina le carbon nanotubes e na le phello ea synergistic ho ntlafatsa conductivity ea mocheso oa thepa e kopantsoeng;ha palo ea carbon nanotubes e lula e le teng, mocheso oa mocheso oa thepa ea motsoako o eketseha ka ho lekana le ho eketseha ha palo ea nano-alumina;ha 100 Ha u sebelisa nano-alumina e le mochine o tsamaisang mocheso oa mocheso, mocheso oa mocheso oa thepa e kopantsoeng o eketseha ka 120%.Ha likarolo tse 5 tsa carbon nanotubes li sebelisoa e le li-filler tse tsamaisang mocheso, mocheso oa mocheso oa thepa e kopantsoeng o eketseha ka 23%.Ha ho sebelisoa likarolo tse 100 tsa alumina le likarolo tse 5 Ha li-carbon nanotubes li sebelisoa e le li-filler tsa thermally conductive, conductivity ea mocheso oa thepa e kopantsoeng e eketseha ka 155%.Teko e boetse e etsa liqeto tse peli tse latelang: Ea pele, ha palo ea carbon nanotubes e sa fetohe, ha palo ea nano-alumina e ntse e eketseha, sebopeho sa marang-rang sa li-filler se entsoeng ke likaroloana tsa li-conductive filler ka rabara butle-butle se eketseha, 'me ntlha ea tahlehelo ea lintho tse entsoeng ka motsoako li eketseha butle-butle.Ha likarolo tse 100 tsa nano-alumina le likarolo tse 3 tsa carbon nanotubes li sebelisoa hammoho, tlhahiso e matla ea mocheso oa compression ea thepa e kopantsoeng ke 12 ℃ feela, 'me thepa ea mechine e matla e ntle haholo;ea bobeli, ha palo ea carbon nanotubes e tsitsitse, ha palo ea nano-alumina e ntse e eketseha, ho thatafala le ho taboha ha matla a lisebelisoa tse kopantsoeng ho eketseha, ha matla a tsitsipano le bolelele ba nako ea khefu a fokotseha.
Li-nanotubes tsa carbon li na le thepa e ntle ea 'mele, conductivity ea mocheso le conductivity ea motlakase, 'me ke li-filler tse matlafatsang.Lisebelisoa tsa bona tse matlafatsang tsa motsoako oa rabara li fumane tlhokomelo e pharaletseng.Li-nanotube tsa carbon li entsoe ka likarolo tse kobehileng tsa maqephe a graphite.Ke mofuta o mocha oa thepa ea graphite e nang le sebopeho sa cylindrical se nang le bophara ba mashome a nanometers (10-30nm, 30-60nm, 60-100nm).Thermal conductivity ea carbon nanotubes ke 3000 W ·(m·K)-1, e leng makhetlo a 5 ho feta mocheso oa koporo.Li-nanotubes tsa carbon li ka ntlafatsa haholo ts'ebetso ea mocheso, motlakase oa motlakase le thepa ea 'mele ea rabara,' me matlafatso ea tsona le mocheso oa mocheso li molemo ho feta li-filler tsa setso tse kang carbon black, carbon fiber le fiber fiber.Bafuputsi ba tsoang Univesithing ea Saense le Theknoloji ea Qingdao ba ile ba etsa lipatlisiso mabapi le ho tsamaisoa ha mocheso oa lisebelisoa tsa motsoako oa carbon nanotubes/EPDM.Liphello li bontša hore: carbon nanotubes e ka ntlafatsa conductivity ea mocheso le thepa ea 'mele ea lisebelisoa tse kopantsoeng;ha palo ea carbon nanotubes e ntse e eketseha, mocheso oa mocheso oa lisebelisoa tse kopantsoeng o ntse o eketseha, 'me matla a ho tsitsa le ho lelefatsa nakong ea khefu a qala ho eketseha ebe joale a fokotseha, Khatello ea maikutlo le matla a ho senya lia eketseha;ha palo ea carbon nanotubes e nyenyane, li-nanotubes tsa carbon-diameter tse kholo li bonolo ho etsa liketane tse tsamaisang mocheso ho feta li-carbon nanotubes tse nyenyane, 'me li kopantsoe hantle le matrix a rabara.
Nako ea poso: Aug-30-2021