Eminyakeni yamuva, i-thermal conductivity yemikhiqizo yenjoloba ithole ukunakwa okukhulu.Imikhiqizo yenjoloba ene-thermally conductive isetshenziswa kakhulu emikhakheni ye-aerospace, indiza, i-electronics, nezinto zikagesi ukuze idlale indima ekuqhubekiseni ukushisa, ukufakwa kwe-insulation kanye nokumunca ukushaqeka.Ukuthuthukiswa kwe-thermal conductivity kubaluleke kakhulu emikhiqizweni yenjoloba ye-thermal conductive.Izinto ezihlanganisiwe zenjoloba ezilungiselelwe i-filler ehambisa ukushisa zingakwazi ukudlulisa ukushisa ngokuphumelelayo, okubaluleke kakhulu ekugxilweni nasekufakweni okuncane kwemikhiqizo ye-elekthronikhi, kanye nokuthuthukiswa kokuthembeka kwayo kanye nokwandiswa kwempilo yabo yesevisi.

Njengamanje, izinto zenjoloba ezisetshenziselwa amathayi zidinga ukuba nezici zokukhiqiza ukushisa okuphansi kanye ne-conductivity ephezulu yokushisa.Ngakolunye uhlangothi, ohlelweni lwe-vulcanization yamathayi, ukusebenza kokudluliswa kokushisa kwerabha kuyathuthukiswa, izinga le-vulcanization liyakhula, futhi ukusetshenziswa kwamandla kuyancishiswa;Ukushisa okukhiqizwa ngesikhathi sokushayela kunciphisa izinga lokushisa kwesidumbu futhi kunciphisa ukuwohloka kokusebenza kwesondo okubangelwa izinga lokushisa elidlulele.I-thermal conductivity yerabha ene-thermal conductive inqunywa ngokuyinhloko i-matrix yerabha kanye nesigcwalisi se-thermal conductive.I-thermal conductivity yezinhlayiya noma i-fibrous thermal conductive filler ingcono kakhulu kunaleyo ye-matrix yerabha.

Okuvame ukusetshenziswa kakhulu ama-thermal conductive fillers yizinto ezilandelayo:

1. I-Cubic Beta isigaba nano silicon carbide (SiC)

I-Nano-scale silicon carbide powder yakha amaketanga okushisa okuxhumana nokushisa, futhi kulula ukuhlanganisa ama-polymers, yakha i-Si-O-Si chain heat conduction skeleton njengendlela eyinhloko yokushisa ukushisa, okuthuthukisa kakhulu ukuhamba okushisayo kwempahla eyinhlanganisela ngaphandle kokunciphisa i-heat conduction skeleton. impahla eyinhlanganisela Izakhiwo zemishini.

I-thermal conductivity ye-silicon carbide epoxy composite material iyakhula ngokunyuka kwenani le-silicon carbide, futhi i-nano-silicon carbide inganikeza into eyinhlanganisela ukuguquguquka okuhle kokushisayo uma inani liphansi.Amandla aguquguqukayo namandla omthelela wezinto ezihlanganisiwe ze-silicon carbide epoxy akhuphuka kuqala bese ehla ngokunyuka kwenani le-silicon carbide.Ukuguqulwa kwendawo ye-silicon carbide kungathuthukisa ngempumelelo ukuqhutshwa kokushisa kanye nezakhiwo zemishini yezinto ezihlanganisiwe.

I-Silicon carbide inezinto zamakhemikhali ezizinzile, ukuqhutshwa kwayo okushisayo kungcono kunezinye izithasiselo ze-semiconductor, futhi ukuqhutshwa kwayo okushisayo kukhulu kakhulu kunaleyo yensimbi ekamelweni lokushisa.Abacwaningi abavela e-Beijing University of Chemical Technology benze ucwaningo mayelana ne-thermal conductivity ye-alumina ne-silicon carbide eqinisa irabha ye-silicone.Imiphumela ibonisa ukuthi ukushisa okushisayo kwerabha ye-silicone kuyanda njengoba inani le-silicon carbide landa;lapho inani le-silicon carbide lifana, ukuqhutshwa kokushisa kwe-silicon carbide eqinile yerabha ye-silicone eqinisiwe kukhulu kunobukhulu bezinhlayiyana ze-silicon carbide eqiniswe irabha ye-silicone;I-thermal conductivity yerabha ye-silicon eqiniswe nge-silicon carbide ingcono kune-alumina eqiniswe irabha ye-silicon.Lapho isilinganiso sobuningi be-alumina/silicon carbide siyi-8/2 futhi inani eliphelele liyizingxenye ezingama-600, ukuhanjiswa okushisayo kwerabha ye-silicon kungcono kakhulu.

2. I-Aluminium Nitride (ALN)

I-Aluminium nitride iyikristalu ye-athomu futhi ingeye-diamond nitride.Ingaba khona ngokuzinzile ekushiseni okuphezulu okungu-2200 ℃.Ine-conductivity enhle yokushisa kanye ne-coefficient ephansi yokwandisa ukushisa, okuyenza ibe yinto enhle yokushaqeka okushisayo.I-thermal conductivity ye-aluminum nitride ingu-320 W ·(m·K)-1, eseduze ne-thermal conductivity ye-boron oxide ne-silicon carbide, futhi inkulu izikhathi ezingaphezu kwezi-5 kune-alumina.Abacwaningi abavela e-Qingdao University of Science and Technology baye bafunda ukuqhutshwa kokushisa kwe-aluminium nitride eqiniswe yizinhlanganisela zenjoloba ze-EPDM.Imiphumela ibonisa ukuthi: njengoba inani le-aluminium nitride landa, ukuqhutshwa kokushisa kwezinto ezihlanganisiwe kuyanda;i-thermal conductivity ye-composite material ngaphandle kwe-aluminium nitride ingu-0.26 W·(m·K)-1, lapho inani le-aluminium nitride lenyuka lifika Ezingxenyeni ezingu-80, ukuqhutshwa kokushisa kwento eyinhlanganisela kufinyelela ku-0.442 W · (m·K) -1, ukwanda ngo-70%.

3. I-Nano alumina (Al2O3)

I-Alumina iwuhlobo lwe-multifunctional inorganic filler, ene-conductivity enkulu ye-thermal, i-dielectric engaguquki kanye nokumelana nokugqokwa okuhle.Isetshenziswa kabanzi ezintweni ezihlanganisiwe zenjoloba.

Abacwaningi abavela e-Beijing University of Chemical Technology bahlole ukuqhutshwa kokushisa kwe-nano-alumina/carbon nanotube/izinhlanganisela zenjoloba yemvelo.Imiphumela ibonisa ukuthi ukusetshenziswa okuhlangene kwe-nano-alumina ne-carbon nanotubes kunomphumela we-synergistic ekuthuthukiseni ukuqhutshwa kokushisa kwezinto ezihlanganisiwe;lapho inani le-carbon nanotubes lihlala njalo, ukuqhutshwa kokushisa kwezinto ezihlanganisiwe kukhula ngokuhambisana nokwanda kwenani le-nano-alumina;lapho 100 Uma usebenzisa i-nano-alumina njengesigcwalisi esibamba ukushisa, ukuqhutshwa kokushisa kwezinto ezihlanganisiwe kukhula ngo-120%.Lapho izingxenye ezi-5 ze-carbon nanotubes zisetshenziswa njengesigcwalisi se-thermal conductive, ukuqhutshwa kokushisa kwezinto ezihlanganisiwe kukhula ngo-23%.Lapho kusetshenziswa izingxenye eziyi-100 ze-alumina nezingxenye ezi-5 Lapho kusetshenziswa ama-carbon nanotubes njenge-filler conductive thermally, ukuqhutshwa kokushisa kwezinto ezihlanganisiwe kukhula ngo-155%.Ukuhlolwa kuphinde kufinyelele iziphetho ezimbili ezilandelayo: Okokuqala, lapho inani le-carbon nanotubes lingashintshi, njengoba inani le-nano-alumina likhuphuka, isakhiwo senethiwekhi yokugcwalisa esakhiwe izinhlayiya zokugcwalisa eziqhutshwayo kunjoloba kancane kancane siyakhula, futhi isici sokulahlekelwa izinto ezihlanganisiwe zikhula kancane kancane.Lapho izingxenye eziyi-100 ze-nano-alumina kanye nezingxenye ze-3 ze-carbon nanotubes zisetshenziswa ndawonye, ​​​​isizukulwane sokushisa sokucindezela okuguquguqukayo sezinto eziyinhlanganisela singu-12 ℃ kuphela, futhi izakhiwo zemishini eziguqukayo zinhle kakhulu;okwesibili, lapho inani le-carbon nanotubes lilungisiwe, njengoba inani le-nano-alumina likhuphuka, Ukuqina namandla okudabula izinto ezihlanganisiwe kuyanda, kuyilapho amandla okudonsa kanye nokwelula ngesikhathi sekhefu kuncipha.

4. I-Carbon Nanotube

Ama-nanotubes e-Carbon anezakhiwo ezinhle kakhulu zomzimba, ukuqhutshwa kwe-thermal conductivity kagesi, futhi ayizigcwalisi zokuqinisa ezifanelekile.Izinto zabo eziyinhlanganisela yenjoloba eqinisayo zithole ukunakwa okusabalele.Ama-nanotube e-carbon akhiwa ngezingqimba ezigoqekayo zamashidi e-graphite.Ziwuhlobo olusha lwezinto ze-graphite ezinesakhiwo esiyisilinda esinobubanzi obungamashumi ama-nanometers (10-30nm, 30-60nm, 60-100nm).I-thermal conductivity ye-carbon nanotubes ingu-3000 W·(m·K)-1, okuyizikhathi ezingu-5 ukuqhutshwa kwe-thermal yethusi.Ama-nanotubes e-Carbon angathuthukisa kakhulu ukuqhutshwa kwe-thermal, ukuqhutshwa kukagesi kanye nezakhiwo zomzimba zenjoloba, futhi ukuqiniswa kwazo kanye nokusebenza okushisayo kungcono kunezigcwalisi zendabuko ezifana ne-carbon black, i-carbon fiber kanye ne-glass fiber.Abacwaningi abavela e-Qingdao University of Science and Technology benze ucwaningo mayelana ne-thermal conductivity ye-carbon nanotubes/EPDM composite materials.Imiphumela ibonisa ukuthi: i-carbon nanotubes ingathuthukisa ukuqhutshwa kokushisa kanye nezakhiwo ezibonakalayo zezinto ezihlanganisiwe;njengoba inani le-carbon nanotubes likhula, ukuqhutshwa kokushisa kwezinto ezihlanganisiwe kuyanda, futhi amandla okuqina kanye nokwelula ngesikhathi sekhefu kukhuphuka kuqala bese kuncipha, Ukucindezeleka okuqinile namandla okudabula kuyanda;lapho inani le-carbon nanotubes lincane, ama-carbon nanotubes anobubanzi obukhulu kulula ukwenza amaketanga ahambisa ukushisa kunama-carbon nanotubes anobubanzi obuncane, futhi ahlanganiswe kangcono ne-matrix yerabha.