Graphite yakanzwa
Graphite yakanzwa
Graphite yakanzwa yakakamurwa kuita pombi-yakavakirwa graphite yakanzwa, polyacrylonitrile-based (PAN-based) graphite yakanzwa, uye viscose-based graphite yakanzwa nekuda kwesarudzo dzakasiyana dzepakutanga felts. Chinangwa chikuru ndechekushandisa sekuchengetedza kupisa uye kupisa kwekudzivirira zvinhu zve monocrystalline silicon yekuyiyisa mavira. Mune indasitiri yemakemikari, inogona kushandiswa seye firita yezvinhu zvakakwirira-kuchena zvinokanganisa makemikari reagents.
Carbon yakanzwa graphite yakanzwa mushure mekurapwa pakudziya kwepamusoro kweinopfuura 2000 ℃ pasi pekushambidzika kana inert mhepo. Iyo kabhoni yezvinhu yakakwira kupfuura iyo yekabhoni yakanzwa, inosvika inopfuura 99%. Pakupera kwema1960, graphite yakanzwa yaive yatowanikwa munyika. Graphite yakanzwa yakakamurwa kuita pombi-yakavakirwa, polyacrylonitrile-yakavakirwa graphite yakanzwa uye viscose-yakavakirwa graphite yakanzwa nekuda kwesarudzo dzakasiyana dzeakatanga kunzwa.
Pakati pavo, iyo asphalt inomiririrwa neKureha Chemical yekuJapan ndiyo inowanda muindasitiri yekudzivirira [2], vekuEurope neAmerican kuputira felts zvinonyanya kugadzirwa zvekunamatira, nepo vazhinji veChina vachishandisa polyacrylonitrile sezvinhu zvakagadzirwa. Maitiro: Cheka iyo polyacrylonitrile-yakavakirwa kabhoni yakanzwa kana viscose-yakavakirwa kabhoni yakanzwika muhukuru hunodiwa, ndokuputira muhubhu ndokuiisa mumudziyo wakagadzirwa ne graphite zvinhu, woisa grafiti mudziyo mune yakanyanya kupisa tembiricha (iyo yakakwira - tembiricha chirafu igirafu grafiti chubhu, yepakati frequency, Yakakwira-frequency induction choto kana mamwe marefu-tembiricha mafesi ane nzira dzekupisa), inodzivirirwa neyekutsva kana yakachena-yakachena gasi inert, yakatsamwa kusvika 2200-2500 ° C pamhepo yekupisa of 100-300 ° C / h, uye ipapo zvakasikwa dzaserera kusvika 100 ° C.
Graphite inonzwa yakasimba uye ine yakasimba oxidation kuramba, asi ine yakashata inochinjika, yakakwira huwandu hwakawanda uye yakanaka kupisa kuchengetedza kuchengetedza. Pamusoro pehunhu hwerucheno rwakakwira, kupisa kwakanyanya, kupisa ngura, uye kusanyungudika kwe block girafu, ivo zvakare vane zvakanakira kuve rakamonerwa, kupeta zvisina tsarukano, kucheka, uye kusona nemucheka we graphite. Chinangwa chikuru che graphite chakanzwika sekuchengetedza kupisa uye kupisa kwekuputira zvinhu zveiyo imwe kristaro yesilicon simbi yekutsva. Mune indasitiri yemakemikari, inogona kushandiswa seye firita yezvinhu zvakakwirira-kuchena zvinokanganisa makemikari reagents. Graphite inonzwa inogona kushandiswa patembiricha ingangoita 3000 ° C mune isina-oxidizing mhepo.
