Kwiminyaka yakutshanje, i-thermal conductivity yeemveliso zerabha ifumene ingqwalasela enkulu.Iimveliso zerabha eziqhuba i-Thermally zisetyenziswa ngokubanzi kwimimandla ye-aerospace, i-aviation, i-electronics, kunye nezixhobo zombane ukudlala indima ekuqhubeni ubushushu, ukugquma kunye nokufunxa ukothuka.Ukuphuculwa kwe-thermal conductivity kubaluleke kakhulu kwiimveliso zerabha ze-thermal conductive.Izinto ezixutywe zerabha ezilungiselelwe yi-thermal conductive filler zinokugqithisela ngokufanelekileyo ubushushu, obaluleke kakhulu ekuxininiseni kunye ne-miniaturization yeemveliso ze-elektroniki, kunye nokuphuculwa kokuthembeka kwabo kunye nokwandiswa kobomi babo benkonzo.

Okwangoku, izinto zerabha ezisetyenziselwa amathayi kufuneka zibe neempawu zokuvelisa ukushisa okuphantsi kunye ne-thermal conductivity ephezulu.Ngakolunye uhlangothi, kwinkqubo ye-vulcanization yamatayara, ukusebenza kokushisa kwerubha kuphuculwe, izinga le-vulcanization liyenyuka, kwaye ukusetyenziswa kwamandla kuyancitshiswa;Ubushushu obuveliswayo ngexesha lokuqhuba bunciphisa ubushushu besidumbu kwaye bucuthe ukuthotywa kokusebenza kwamatayara okubangelwa bubushushu obugqithisileyo.I-thermal conductivity yerubha ye-thermal conductive inqunywe ngokukodwa yi-rubber matrix kunye ne-thermal conductive filler.I-thermal conductivity ye-particle okanye i-fibrous thermal conductive filler ingcono kakhulu kune-matrix yerabha.

Ezona ziqhelekileyo zisetyenziswayo zifakela i-thermal conductive ezi zinto zilandelayo:

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

I-Nano-scale silicon carbide powder yenza unxibelelwano lwamatyathanga okuqhuba ubushushu, kwaye kulula ukwenza isebe kunye neepolymers, zenza iSi-O-Si chain chain conduction skeleton njengeyona ndlela iphambili yokuqhuba ubushushu, ephucula kakhulu ukuhanjiswa kwe-thermal yezinto ezihlanganisiweyo ngaphandle kokunciphisa imathiriyeli ehlanganisiweyo Iimpawu zoomatshini.

I-thermal conductivity ye-silicon carbide epoxy composite material inyuka ngokunyuka kwexabiso le-silicon carbide, kunye ne-nano-silicon carbide inokunika izinto ezidibeneyo zokuqhuba kakuhle kwe-thermal xa ixabiso liphantsi.Amandla aguquguqukayo kunye namandla empembelelo ye-silicon carbide epoxy composite imathiriyeli yonyuka kuqala kwaye emva koko iyancipha ngokunyuka komthamo we-silicon carbide.Ukuguqulwa komphezulu we-silicon carbide kunokuphucula ngokufanelekileyo ukuqhutyelwa kwe-thermal kunye neempawu zomatshini wezinto ezidibeneyo.

I-Silicon carbide ineempawu ezizinzileyo zeekhemikhali, i-thermal conductivity yayo ingcono kunezinye iifayili ze-semiconductor, kwaye i-thermal conductivity yayo ikhulu ngakumbi kuneyetsimbi kwiqondo lokushisa.Abaphandi abavela kwiYunivesithi yaseBeijing yeChemical Technology benza uphando malunga ne-thermal conductivity ye-alumina kunye ne-silicon carbide eqiniswe irabha ye-silicone.Iziphumo zibonisa ukuba i-thermal conductivity yerubha ye-silicone iyanda njengoko inani le-silicon carbide likhula;xa ubungakanani be-silicon carbide bufana, i-thermal conductivity ye-particle encinci ye-silicon carbide i-rubber ye-silicone eyomeleziweyo inkulu kunobukhulu be-particle size ye-silicon carbide eqiniswe irabha ye-silicone;I-thermal conductivity yerubha ye-silicon eyomelezwe nge-silicon carbide ingcono kune-alumina eyomeleziweyo yerabha ye-silicon.Xa ubungakanani bobunzima be-alumina / i-silicon carbide yi-8/2 kwaye isixa sisonke singama-600 amalungu, i-thermal conductivity yerubha ye-silicon yeyona ilungileyo.

2. IAluminiyam Nitride (ALN)

I-Aluminiyam nitride yikristale yeathom kwaye yeye-nitride yedayimani.Inokubakho ngokuzinzileyo kubushushu obuphezulu obungama-2200 ℃.Inokuqhuba kakuhle kwe-thermal kunye ne-coefficient yokwandisa i-thermal ephantsi, iyenza ibe yinto efanelekileyo yokutshatyalaliswa kwe-thermal.I-thermal conductivity ye-aluminium nitride yi-320 W · (m·K) -1, ekufutshane ne-thermal conductivity ye-boron oxide kunye ne-silicon carbide, kwaye ingaphezulu kwamaxesha ama-5 amakhulu kune-alumina.Abaphandi abavela kwiYunivesithi yaseQingdao yeSayensi kunye neTekhnoloji baye bafunda ukuqhutyelwa kwe-thermal ye-aluminium nitride eyomeleziweyo ye-EPDM ye-rubber composite.Iziphumo zibonisa ukuba: njengoko inani le-aluminium nitride linyuka, ukuqhutyelwa kwe-thermal ye-composite material yanda;i-thermal conductivity ye-composite material ngaphandle kwe-aluminium nitride yi-0.26 W · (m·K) -1, xa inani le-aluminium nitride linyuka ukuya kwiingxenye ze-80, i-thermal conductivity ye-composite material ifikelela kwi-0.442 W · (m·K) -1, ukwanda kwe-70%.

3. INano alumina (Al2O3)

I-Alumina luhlobo lwe-multifunctional inorganic filler, ene-conductivity enkulu ye-thermal, i-dielectric rhoqo kunye nokumelana nokunxiba kakuhle.Isetyenziswe ngokubanzi kwizinto ezidibeneyo zerubha.

Abaphandi abavela kwiYunivesithi yaseBeijing yeChemical Technology bavavanya i-thermal conductivity ye-nano-alumina / i-carbon nanotube / i-rubber yendalo.Iziphumo zibonisa ukuba ukusetyenziswa okudibeneyo kwe-nano-alumina kunye ne-carbon nanotubes kunefuthe le-synergistic ekuphuculeni ukuhanjiswa kwe-thermal yezinto ezidibeneyo;xa inani le-carbon nanotubes lihlala lihlala, i-thermal conductivity ye-composite material iyanda ngokuhambelana nokunyuka kwenani le-nano-alumina;xa 100 Xa usebenzisa i-nano-alumina njengento yokuzalisa i-thermal conductive, i-thermal conductivity ye-composite material yanda nge-120%.Xa iingxenye ezi-5 ze-carbon nanotubes zisetyenziselwa ukuzaliswa kwe-thermal conductive, i-thermal conductivity ye-composite material yanda ngama-23%.Xa iinxalenye ze-100 ze-alumina kunye neengxenye ze-5 zisetyenzisiweyo Xa i-carbon nanotubes isetyenziswa njenge-thermal conductive filler, i-thermal conductivity ye-composite material yanda nge-155%.Uvavanyo kwakhona lufikelela ezi zigqibo zibini zilandelayo: Eyokuqala, xa isixa se-carbon nanotubes sihlala sihlala, njengoko isixa se-nano-alumina sinyuka, ulwakhiwo lomnatha wokugcwalisa olwenziwa ngamasuntswana okugcwalisa kwirubha ngokuthe ngcembe, kwaye ilahleko yesixhobo izinto ezihlanganisiweyo zikhula ngokuthe ngcembe.Xa iinxalenye ze-100 ze-nano-alumina kunye neengxenye ze-3 ze-carbon nanotubes zisetyenziselwa kunye, ukuveliswa kobushushu obuguquguqukayo bezinto ezidibeneyo ziyi-12 ℃ kuphela, kunye neempawu ze-dynamic mechanical zibalaseleyo;okwesibini, xa isixa se-carbon nanotubes silungisiwe, njengoko isixa se-nano-alumina sinyuka, Ukuqina kunye nokukrazula amandla ezinto ezihlanganisiweyo zanda, ngelixa amandla okuqina kunye nokuphakama kwikhefu kuncipha.

4. ICarbon Nanotube

Iikhabhoni nanotubes zineempawu ezibalaseleyo zomzimba, ukuhanjiswa kwe-thermal kunye nokuhanjiswa kombane, kwaye zezona zilungele ukuqinisa izihluzi.Izinto zabo ezidityanisiweyo zerabha zokuqinisa ziye zafumana ingqwalasela ebanzi.Iinanotubes zekhabhoni zenziwe ngokujija iileya zamaphepha egraphite.Ziyintlobo entsha yezinto zegraphite kunye nesakhiwo se-cylindrical kunye nobubanzi bamashumi e-nanometers (10-30nm, 30-60nm, 60-100nm).I-thermal conductivity ye-carbon nanotubes yi-3000 W · (m·K) -1, ephindwe ka-5 i-thermal conductivity yobhedu.ICarbon nanotubes inokuphucula kakhulu ukuhanjiswa kwe-thermal, ukuhanjiswa kombane kunye neempawu ezibonakalayo zerubha, kunye nokuqiniswa kwazo kunye ne-thermal conductivity kungcono kunezaliso zemveli ezifana nekhabhoni emnyama, i-carbon fiber kunye nefiber yeglasi.Abaphandi abavela kwiYunivesithi yaseQingdao yeSayensi kunye neTeknoloji baqhube uphando malunga ne-thermal conductivity ye-carbon nanotubes / EPDM izinto ezidibeneyo.Iziphumo zibonisa ukuba: i-carbon nanotubes inokuphucula ukuqhutyelwa kwe-thermal kunye neempawu ezibonakalayo zezinto ezidibeneyo;njengoko inani le-carbon nanotubes lisanda, ukuqhutyelwa kwe-thermal ye-composite materials kuyanda, kwaye amandla okunyamezela kunye nokwandisa ngexesha lekhefu ukunyuka kuqala kwaye kuyancipha, Uxinzelelo lwe-tensile kunye namandla okukrazula kwanda;xa inani le-carbon nanotubes lincinci, i-carbon nanotubes enobubanzi obukhulu ilula ukwenza amatyathanga okuqhuba ukushisa kune-carbon nanotubes encinci ye-diameter, kwaye idibene ngcono kunye ne-rubber matrix.