Menene halayen graphite mai faɗaɗawa bayan dumama cikin graphite mai faɗaɗawa?

Halayen haɓakawa natakardar graphite mai faɗaɗasun bambanta da sauran wakilai na fadadawa. Lokacin da aka yi zafi zuwa wani zafin jiki, graphite mai faɗaɗawa yana fara faɗaɗawa saboda bazuwar mahaɗan da ke cikin lattice ɗin interlayer, wanda ake kira zafin faɗaɗa na farko. Yana faɗaɗa gaba ɗaya a 1000 ℃ kuma ya kai matsakaicin girma. Ƙarfin haɓakawa zai iya kaiwa fiye da sau 200 na ƙimar farko. Faɗin graphite ana kiransa faɗaɗa graphite ko graphite worm, wanda ke canzawa daga siffar flake na asali zuwa siffar tsutsotsi tare da ƙarancin ƙarancin ƙima, yana samar da mafi kyawun murfin thermal insulation. Fadada graphite ba kawai tushen carbon ba ne a cikin tsarin faɗaɗawa, har ma da insulating Layer. Yana iya yadda ya kamatarufe zafi. A cikin wuta, yana da halaye na ƙarancin sakin zafi, ƙananan asarar jama'a da ƙarancin iskar hayaƙi.

Menene halayen graphite mai faɗaɗawa bayan dumama cikin graphite mai faɗaɗawa?

Halayen faɗaɗa graphite

① Ƙarfin juriya mai ƙarfi,sassauci, filastik da lubrication kai;

② Ƙarfin juriya ga high, ƙananan zafin jiki,lalatada kuma radiation;

③ Ƙaƙƙarfan halayen girgizar ƙasa;

④ Mai ƙarfi sosairashin daidaituwa;

⑤Strong anti-tsufa da anti murdiya Properties.

⑥ Yana iya tsayayya da narkewa da shigar da karafa daban-daban;

⑦ Ba shi da guba, ba ya ƙunshe da wani carcinogens kuma baya cutar da muhalli.

Hannun ci gaba da yawa na faɗaɗa graphite sune kamar haka:

1. Fadada graphite don dalilai na musamman

Gwaje-gwaje sun nuna cewa tsutsotsin graphite suna da aikin ɗaukar igiyoyin lantarki. Faɗin graphite dole ne ya cika buƙatun masu zuwa: (1) ƙananan zafin faɗaɗawar farko da babban ƙarar haɓakawa; (2) Abubuwan sinadarai sun tsaya tsayin daka, an adana su har tsawon shekaru 5, kuma haɓakar haɓakar asali ba ta lalacewa; (3) Fuskar faffadan graphite tsaka tsaki ne kuma ba shi da lalata ga harsashin harsashi.

2. Granular fadada graphite

Karamin barbashi faɗaɗa graphite galibi yana nufin 300 raga mai faɗin graphite tare da ƙarar haɓakar 100ml/g. Ana amfani da wannan samfurin musamman don hana wutasutura, wanda ke da matukar bukata.

3. Fadada graphite tare da babban zafin haɓaka haɓakawa na farko

The farko fadada zafin jiki na graphite fadada tare da babban farko fadada zafin jiki ne 290-300 ℃, da kuma fadada girma ne ≥ 230ml / g. Irin wannan nau'in graphite da aka faɗaɗa ana amfani da shi ne don hana wuta na robobin injiniya da roba.

4. Surface modified graphite

Lokacin da aka yi amfani da faɗaɗa graphite azaman abu mai ɗaukar wuta, ya haɗa da dacewa tsakanin graphite da sauran abubuwan haɗin gwiwa. Saboda babban ma'adinai na graphite surface, ba lipophilic ko hydrophilic ba. Don haka, dole ne a gyara fuskar graphite don magance matsalar daidaitawa tsakanin graphite da sauran abubuwan haɗin gwiwa. An ba da shawarar cewa za a yi farin ciki a saman graphite, wato, don rufe saman graphite tare da wani farin fim mai ƙarfi, wanda matsala ce mai wuyar warwarewa. Ya ƙunshi membrane chemistry ko surface sunadarai. Gidan gwaje-gwaje na iya yin hakan, kuma akwai matsaloli a masana'antu. Irin wannan farin graphite mai faɗaɗawa ana amfani dashi galibi azaman rufin wuta.

5. Low farko fadada zafin jiki da ƙananan zafin jiki fadada graphite

Wannan nau'in graphite da aka faɗaɗa yana farawa a 80-150 ℃, kuma ƙarar haɓaka ya kai 250ml / g a 600 ℃. Matsalolin da aka samu wajen shirya saduwar graphite mai faɗaɗa wannan yanayin sune: (1) zaɓar wakili mai dacewa; (2) Sarrafa da sarrafa yanayin bushewa; (3) Ƙaddamar da danshi; (4) Magance matsalolin kare muhalli.