Cikakken bincike na ƙa'idar dumama sandar graphite

Cikakken bincike na ƙa'idar dumama sandar graphite

Ana amfani da sandar graphite sau da yawa azaman madadinhita ta lantarki ta amfani da injin dumama mai zafi. Yana da sauƙin oxidize a babban zafin jiki. Banda injin tsotsa, ana iya amfani da shi ne kawai a cikin yanayi mai tsaka tsaki ko kuma yanayin rage yanayi. Yana da ƙaramin adadin faɗaɗa zafi, babban ƙarfin lantarki na zafi, juriya mai zafi, sanyi mai tsanani da juriya mai zafi, da ƙarancin farashi. Yawan oxidation da ƙimar volatilization na graphite yana shafar rayuwar sabis na janareta na zafi. Lokacin da ainihin sararin samaniya yake 10-3 ~ 10-4 mmHg, zafin sabis ɗin ya kamata ya kasance ƙasa da 2300 ℃. A cikin yanayin kariya (H2, N2, AR, da sauransu), zafin sabis ɗin zai iya kaiwa 3000 ℃. Ba za a iya amfani da graphite a cikin iska ba, in ba haka ba za a yi oxidize kuma a cinye shi. Yana yin tasiri sosai tare da W sama da 1400 ℃ don samar da carbide.
Sanda mai siffar graphite galibi an yi ta ne da graphite, don haka za mu iya fahimta.siffofin graphite:
Wurin narkewar graphite yana da tsayi sosai. Yana fara laushi kuma yana narkewa lokacin da ya kai 3000C a ƙarƙashin injin tsabtace iska. A 3600c, graphite yana fara ƙafewa da kuma yin ƙasa. Ƙarfin kayan gabaɗaya yana raguwa a hankali a lokacin zafi mai yawa. Duk da haka, lokacin da aka dumama graphite zuwa 2000c, ƙarfinsa ya ninka na zafin ɗaki sau biyu. Duk da haka, juriyar iskar oxygen na graphite ba ta da kyau, kuma ƙimar iskar oxygen tana ƙaruwa a hankali tare da ƙaruwar zafin jiki.
Lantarki da kuma ƙarfin lantarki na graphite suna da yawa sosai. Lantarki ya fi na bakin karfe sau 4, ya fi na carbon sau 2, kuma ya fi na ba ƙarfe ba sau 100. Lantarki ba wai kawai ya fi na ƙarfe kamar ƙarfe, ƙarfe da gubar ba, har ma yana raguwa tare da ƙaruwar zafin jiki, wanda ya bambanta da kayan ƙarfe na yau da kullun. Graphite ma yana da saurin zama adiabatic a yanayin zafi mai yawa. Saboda haka, aikin rufin zafi na graphite abin dogaro ne sosai a ƙarƙashin yanayin zafi mai tsanani.
A ƙarshe, za mu iya yanke hukuncin cewa ƙa'idar dumamasandar graphiteshine: girman wutar da aka ƙara a sandar graphite, haka zafin saman sandar graphite yake ƙaruwa.