Furfur karbida na silikoni

Ana sarrafa silikon karbaiɗ mai baƙi bisa takamaiman ƙayyadaddun bayanai. Tsananin kulawa kan matakai da siffar ƙwayoyi yana tabbatar da ingantaccen kammalawa a kowane lokaci. Ana samun foda silikon karbaiɗ a cikin girman ƙwayoyin gogewa daban-daban da kuma a cikin kima na fam biyar, goma, ko ashirin da biyar. Ana iya yin odar manyan adadi idan an nema. Ana amfani da shi sosai wajen fashewar matsa lamba. Ci gaba da karantawa don ƙarin bayani. Hakanan za ka iya ƙarin koyo game da halaye da hanyoyin haɓaka foda silikon karbaiɗ.

Rarraba girman ƙurar silicon carbide

Wannan takarda ta bayar da rahoton rarraba girman foda silicon carbide. An samar da wannan kayan ta hanyar niƙa ta hanyar gogayya (attrition milling). Girman ƙwayoyin kayan da aka sarrafa a ƙarshe ya kasance 37 nm. Daga nan, an yi sintering ba tare da matsin lamba ba ta hanyar ƙara carbon da boron carbide a zafin jiki na 2050 °C. An tantance rarraba girman ƙwayoyin ta amfani da na'urar duba ƙwayoyin lantarki mai watsawa (transmission electron microscope, TEM).

Yadda girman barbashin SiC ke rarrabewa yana shafar hanyoyi daban-daban na sarrafawa, ciki har da girman kristal da sublimation. Girman d10 da d90 na wannan kayan suna da muhimmanci saboda su ne ke tantance fuskar girma, mafi girman cunkoson marufi, da kwanciyar zafi. Duk da haka, barbashin silicon carbide na da babban matsakaicin diamita na barbashi da ƙaramin d90, don haka d10 ɗinsa ma ƙasa yake.

Sakamakon da ke sama ya nuna cewa haɗin foda silicon carbide masu girma-girma daban-daban na iya ƙara yawan na'urar da aka buga. A cikin binciken da aka yi a baya, an shirya kayan foda gauraye ta hanyar gwaji da kuskure. A wannan binciken, an yi amfani da hanyoyin gwaji da samfurin kwamfuta don shirya kayan foda gauraye. An shirya foda mai siffofi biyu ta hanyar haɗa girma biyu daban-daban na foda silicon carbide. An auna ƙimar cunkoson foda ta tura, sannan an buga faranti na silicon carbide ta amfani da wannan gaurayawar foda mai siffofi biyu.

Kwatarin yadda girman barbashin SiC da aka samo ta hanyar BET da SEM ya tabbatar cewa ƙimomin SSA a cikin waɗannan samfuran suna cikin iyakokin da za a iya karɓa. An gano cewa SSA na waɗannan ƙurar b-SiC masu tsarkin gaske guda biyu sun kasance daidaitattu a cikin iyakar 25/75. Bugu da ƙari, sun yi daidai sosai da ƙimomin SSA da aka ƙididdige: 48 m2/g don haɗin 25/75 da 33.9 m2/g don haɗin 75/25.

Yayin da foda SIKA ta nuna girman ƙwayoyi iri ɗaya, samfurin FAU ya nuna rarrabuwar girma daban-daban. A gefe guda, foda FAU ta nuna tsari na musamman na ƙwayoyi ƙanana, masu kumbura, da manya. Waɗannan ƙwayoyin manya sun fi na ƙanana yawa a cunkoso. Wannan bambancin cunkoso ya samo asali ne daga bambancin yawan foda a cikin marufi. Duk da haka, kayan tushen SIKA sun yi amfani da yawan foda mafi girma fiye da na baya.

Rarraba girman ƙurar silicon carbide suna da bambance-bambance da dama. Farin SIKA yana nuna sauyin siffa mai laushi fiye da na baya. Duk da haka, farin SIKA yana da ƙarfi wajen jure bugun zafi kuma yana iya daidaitawa da fuskar girman sama. Ana danganta wannan bambanci ne ga rashin kariyar ƙurar carbon tsakanin iri da foda tushen. Amma waɗannan bambance-bambancen ba su samo asali ne daga amfani da farin SIKA kaɗai ba; ƙananan gyare-gyare a ƙirar yankin zafi na iya hana wannan lamari.

Halayen foda na silicon carbide

Halayen foda silicon carbide ana kayyade su ne ta hanyar sinadaran da ke cikinsu, tsarin polycrystalline, da hanyar samarwa. Kristal ɗaya na silicon carbide yana da siffar alpha a sinadari da ƙarfi. Akwai nau'uka da dama na silicon carbide. Kowanne nau'i na da halaye na musamman, amma dukkansu ana ɗaukar su a matsayin abubuwan gogewa. Wasu misalan foda silicon carbide sun haɗa da:

Tsarin kayan na silinda ne, tare da layuka na a-SiC da b-SiC a waje. Wannan kayan ana kiransa silicon carbide kore ko silicon carbide baki, kuma ana samunsa a nau'uka da dama, daga foda har zuwa ingots. Kowane nau'i na silicon carbide ana sarrafa shi don aikinsa kuma ana iya murƙushe shi domin samun halayen da ake so. Saboda haɗuwar halayen jiki da na sinadarai, silicon carbide ya zama kayan da ya dace a yi amfani da shi a fannoni daban-daban na zazzabi mai girma da juriya ga gogayya.

Kristalolin SiC sun ƙunshi nau'ikan polymorphs guda uku daban-daban. Silikon karbaiyd na alpha yana samuwa a zafin jiki mafi girma fiye da na beta, tare da tsarin kristal mai siffar hexagonal wanda ya yi kama da Wurtzite. A gefe guda, silikon karbaiyd na beta yana da tsarin kristal mafi ƙarfi kuma yana kama da lu'u-lu'u. Duk nau'ikan suna da amfani a masana'antu, amma silikon karbaiyd na alpha yana da ƙarancin aikace-aikacen kasuwanci. Ana amfani da silikon karbaiyd na beta musamman don tallafin katalis.

Silicon carbide kayan gogewa ne mai amfani a fannoni da dama a masana'antu daban-daban. Saboda taurin sa, ya zama kayan aiki mai kyau wajen aikin gogewa. Hakanan yana iya jure zafin jiki mai yawa, kuma ana amfani da shi a faranti na seramiki na motoci masu daraja, rigunan kariya daga harsashi, da hatimin sandar famfo. Silicon carbide kuma yana da kyakkyawar gudanarwar zafi, wanda ya sa ya dace a yi amfani da shi a cikin kayan wuta masu jure zafi. Haka kuma, farashin silicon carbide ya bambanta gwargwadon aikace-aikacen sa.

Karbayid na siliki kore ma yana da amfani ga semikonduktor. Juriyarsa ga ƙarfin lantarki ta fi ta siliki na al'ada sau goma. Wannan ya sa ya fi gallium nitride kyau a tsarin da ke sama da 1000V. Saboda haka, karbayid na siliki yana da matuƙar daraja a motocin lantarki, na'urorin juyar wutar rana, da tsarin na'urorin gano abubuwa. Idan kuna sha'awar haɓaka sabon samfur ko nemo sabon kasuwa ga tsohon samfur, seramics na silicon carbide na iya zama mafita mafi dacewa, kuma farashin silicon carbide yana da rahusa tare da inganci mai kyau.

Na'urar XRD spectrograph tana ba da damar nazarin tsarin ƙwayoyin zarra na foda silicon carbide, tana ba da damar duba tsari da sinadaran samfur a kusa. Ƙudurin spectral na na'urar shi ne 1 cm⁻¹, wanda ke ba da damar yin aunawa ko da a yanayin zafi mai ƙasa. Ana amfani da tsayin raɗaɗɗen haske daban-daban don siginar luminescence da Raman, don haka yana da muhimmanci a raba su. Bugu da ƙari, wannan hanyar na iya gano bambance-bambancen halayen samfuran daban-daban.