A cikin 'yan shekarun nan, da thermal conductivity na roba kayayyakin ya samu sosai da hankali.Ana amfani da samfuran roba masu ɗaukar zafi da yawa a fagen sararin samaniya, jirgin sama, na'urorin lantarki, da na'urorin lantarki don taka rawa wajen tafiyar da zafi, rufewa da ɗaukar girgiza.Haɓaka haɓakar haɓakar thermal yana da matuƙar mahimmanci ga samfuran roba masu ɗaukar zafi.Abubuwan da aka haɗe na roba da aka shirya ta hanyar filler mai ɗaukar hoto na iya canza yanayin zafi yadda ya kamata, wanda ke da mahimmanci ga haɓakawa da ƙarancin samfuran lantarki, da haɓaka amincin su da haɓaka rayuwar sabis ɗin su.
A halin yanzu, kayan roba da ake amfani da su a cikin tayoyin suna buƙatar samun halayen ƙarancin samar da zafi da haɓakar zafi mai ƙarfi.A gefe guda, a cikin aikin vulcanization na taya, ana inganta aikin canja wurin zafi na roba, ana ƙara yawan vulcanization, kuma rage yawan makamashi;Zafin da ake samu yayin tuƙi yana rage zafin gawar kuma yana rage lalacewar aikin taya saboda yawan zafin jiki.Thermal conductivity na thermal conductive roba yawanci ƙaddara ta roba matrix da thermal conductive filler.Matsakaicin zafin jiki na ko dai barbashi ko fibrous thermal conductive filler ya fi na matrix na roba.
Abubuwan da aka fi amfani da su na thermally conductive fillers sune abubuwa masu zuwa:
1. Cubic Beta lokaci nano silicon carbide (SiC)
Nano-sikelin silicon carbide foda Forms lamba zafi conduction sarƙoƙi, kuma ya fi sauƙi ga reshe tare da polymers, forming Si-O-Si sarkar zafi conduction kwarangwal a matsayin babban zafi conduction hanya, wanda ƙwarai inganta thermal watsin na hadaddun abu ba tare da rage kayan hade da kayan aikin injiniya.
Ƙarƙashin zafin jiki na silicon carbide epoxy composite abu yana ƙaruwa tare da karuwa a cikin adadin silicon carbide, kuma nano-silicon carbide na iya ba da kayan haɗin gwiwar kyakkyawan yanayin zafi lokacin da adadin ya ragu.Ƙarfin sassauƙa da ƙarfin tasirin silicon carbide epoxy composite kayan yana ƙaruwa da farko sannan kuma ya ragu tare da karuwar adadin siliki carbide.Gyaran saman silikon carbide na iya inganta haɓakar yanayin zafi da injuna na kayan haɗin gwiwar yadda ya kamata.
Silicon carbide yana da tabbataccen sinadarai masu ƙarfi, ƙarfin zafinsa ya fi sauran filaye na semiconductor, kuma yanayin zafinsa ya ma fi na ƙarfe a zafin daki.Masu bincike daga Jami'ar Kimiyya ta Jami'ar Beijing sun gudanar da bincike a kan yanayin zafi na alumina da silicon carbide ƙarfafa silicone roba.Sakamakon ya nuna cewa zafin zafin jiki na roba na silicone yana ƙaruwa yayin da adadin siliki carbide ya karu;lokacin da adadin siliki carbide ya zama iri ɗaya, ƙarancin zafin jiki na ƙaramin siliki mai ƙarfi na siliki mai ƙarfi na siliki mai ƙarfi ya fi na babban nau'in siliki mai ƙarfi na siliki mai ƙarfi;Ƙunƙarar zafin zafin jiki na roba na siliki da aka ƙarfafa tare da silicon carbide ya fi na alumina ƙarfafa silicon roba.Lokacin da yawan adadin alumina / silicon carbide shine 8/2 kuma jimlar adadin shine sassa 600, ƙimar zafin zafin jiki na silicon roba shine mafi kyau.
Aluminum nitride crystal atomic ne kuma yana cikin nitride lu'u-lu'u.Yana iya zama stably a high zafin jiki na 2200 ℃.Yana da kyawawa mai kyau na thermal conductivity da ƙananan haɓaka haɓakar haɓakar thermal, yana mai da shi kyakkyawan kayan girgiza thermal.Ƙarfin wutar lantarki na aluminum nitride shine 320 W · (m·K) -1, wanda ke kusa da thermal conductivity na boron oxide da silicon carbide, kuma ya fi sau 5 girma fiye da na alumina.Masu bincike daga Jami'ar Kimiyya da Fasaha ta Qingdao sun yi nazarin yanayin zafi na aluminium nitride da aka ƙarfafa EPDM roba.Sakamakon ya nuna cewa: yayin da adadin nitride na aluminium ya karu, haɓakar thermal conductivity na kayan haɗin gwiwar yana ƙaruwa;Ƙarfafawar thermal na kayan da aka haɗa ba tare da aluminum nitride ba shine 0.26 W · (m·K) -1, lokacin da adadin nitride na aluminum ya karu zuwa A sassa 80, ƙaddamarwar thermal na kayan haɗin gwiwar ya kai 0.442 W · (m·K) -1, karuwa da 70%.
Alumina wani nau'i ne na filler inorganic multifunctional, wanda ke da babban ƙarfin wutar lantarki, dielectric akai-akai da kuma juriya mai kyau.Ana amfani dashi sosai a cikin kayan haɗin roba.
Masu bincike daga Jami'ar Kimiyya ta Jami'ar Beijing sun gwada yanayin zafi na nano-alumina/carbon nanotube/natube na roba.Sakamakon ya nuna cewa haɗuwa da amfani da nano-alumina da carbon nanotubes yana da tasiri mai tasiri akan inganta yanayin zafi na kayan haɗin gwiwar;lokacin da adadin carbon nanotubes ya kasance akai-akai, ƙaddamarwar thermal na kayan haɗakarwa yana ƙaruwa tare da ƙara yawan adadin nano-alumina;lokacin da 100 Lokacin amfani da nano-alumina azaman filler thermal conductive filler, thermal conductivity na kayan hade yana ƙaruwa da 120%.Lokacin da aka yi amfani da sassa 5 na carbon nanotubes azaman filler na thermal conductive, thermal conductivity na kayan hade yana ƙaruwa da 23%.Lokacin da aka yi amfani da sassa 100 na alumina da sassa 5 Lokacin da ake amfani da carbon nanotubes azaman filler thermal conductive filler, thermal conductivity na kayan hade yana ƙaruwa da 155%.Har ila yau, gwajin ya zana ra'ayoyi biyu masu zuwa: Na farko, lokacin da adadin carbon nanotubes ya kasance akai-akai, yayin da adadin nano-alumina ya karu, tsarin cibiyar sadarwar filler da aka kafa ta hanyar kwayoyin filler a cikin roba a hankali yana ƙaruwa, kuma asarar factor na Haɗin abu a hankali yana ƙaruwa.Lokacin da 100 sassa na nano-alumina da 3 sassa na carbon nanotubes ake amfani da tare, da tsauri matsawa zafi tsara na composite abu ne kawai 12 ℃, da kuma tsauri inji Properties ne m;na biyu, lokacin da adadin carbon nanotubes ya kayyade, yayin da adadin nano-alumina ya karu, Ƙarfin ƙarfi da tsagewar kayan haɗin gwiwar yana ƙaruwa, yayin da ƙarfin ƙarfi da haɓakawa a raguwa ya ragu.
Carbon nanotubes suna da ingantattun kaddarorin jiki, zafin zafin jiki da motsin wutar lantarki, kuma suna da ingantattun filaye masu ƙarfafawa.Abubuwan haɗin gwiwar roba na ƙarfafa su sun sami kulawa sosai.Carbon nanotubes suna samuwa ta hanyar curling yadudduka na graphite zanen gado.Wani sabon nau'in kayan graphite ne tare da tsarin silindi mai tsayi tare da diamita na dubun nanometers (10-30nm, 30-60nm, 60-100nm).Thermal conductivity na carbon nanotubes ne 3000 W · (m · K) -1, wanda shi ne 5 sau da thermal conductivity na jan karfe.Carbon nanotubes na iya inganta haɓakar yanayin zafi, ƙarfin lantarki da kaddarorin jiki na roba, kuma ƙarfafa su da haɓakar zafin jiki sun fi na gargajiya na gargajiya kamar baƙin carbon, fiber carbon da fiber gilashi.Masu bincike daga Jami'ar Kimiyya da Fasaha ta Qingdao sun gudanar da bincike a kan yanayin zafi na carbon nanotubes/EPDM na kayan haɗin gwiwa.Sakamakon ya nuna cewa: carbon nanotubes na iya inganta haɓakar yanayin zafi da kayan jiki na kayan haɗin gwiwa;yayin da adadin carbon nanotubes ya karu, haɓakar thermal conductivity na kayan haɗakarwa yana ƙaruwa, kuma ƙarfin ƙarfi da haɓakawa a lokacin hutu na farko ya karu sannan kuma ya ragu, Ƙarfafa ƙarfin ƙarfi da ƙarfin tsagewa yana ƙaruwa;lokacin da adadin carbon nanotubes ya ƙanƙanta, manyan diamita na carbon nanotubes sun fi sauƙi don samar da sarƙoƙi masu sarrafa zafi fiye da ƙananan diamita na carbon nanotubes, kuma sun fi haɗuwa da matrix na roba.
Lokacin aikawa: Agusta-30-2021