Bayyana keɓaɓɓen kaddarorin da fatan aikace-aikace na koren silicon carbide micropowder
A cikin babban kayan fasaha na yau, koren silicon carbide micropowder sannu a hankali yana zama abin da aka fi mayar da hankali a cikin al'ummar kimiyyar kayan tare da kaddarorinsa na zahiri da sinadarai. Wannan fili wanda ya ƙunshi abubuwan carbon da silicon ya nuna fa'idodin aikace-aikacen da yawa a fannonin masana'antu da yawa saboda tsarin kristal na musamman da kyakkyawan aiki. Wannan labarin zai bincika cikin zurfin ƙayyadaddun kaddarorin koren silicon carbide micropowder da yuwuwar aikace-aikacen sa a fannoni daban-daban.
1. Basic halaye na kore silicon carbide micropowder
Koren silicon carbide (SiC) abu ne mai ƙarfi na roba kuma yana cikin mahaɗin haɗin gwiwa. Tsarinsa na crystal yana ba da tsarin hexagonal tare da tsari mai kama da lu'u-lu'u. Koren silicon carbide micropowder yawanci yana nufin samfuran foda tare da girman girman 0.1-100 microns, kuma launin sa yana ba da sautuna iri-iri daga haske kore zuwa kore mai duhu saboda daban-daban tsabta da abun ciki na ƙazanta.
Daga tsarin ƙananan ƙananan, kowane siliki atom a cikin koren silicon carbide crystal yana samar da haɗin gwiwar tetrahedral tare da ƙwayoyin carbon guda huɗu. Wannan tsarin haɗin gwiwa mai ƙarfi yana ba kayan taurin gaske da kwanciyar hankali. Ya kamata a lura da cewa taurin Mohs na koren silicon carbide ya kai 9.2-9.3, na biyu kawai zuwa lu'u-lu'u da cubic boron nitride, wanda ya sa ba za a iya maye gurbinsa ba a fagen abrasives.
2. Musamman Properties na kore silicon carbide micropowder
1. Kyakkyawan kayan aikin injiniya
Mafi shahararren siffa na siliki carbide micropowder kore shine tsananin taurin sa. Its taurin Vickers na iya kaiwa 2800-3300kg/mm², wanda ya sa ya yi aiki da kyau yayin sarrafa kayan aiki. A lokaci guda, koren silicon carbide shima yana da kyakkyawan ƙarfi na matsawa kuma yana iya kula da ƙarfin injina a babban yanayin zafi. Wannan yanayin yana ba da damar yin amfani da shi a cikin matsanancin yanayi.
2. Madalla da thermal Properties
Thermal conductivity na kore silicon carbide ne har zuwa 120-200W/(m·K), wanda shi ne 3-5 sau na talakawa karfe. Wannan kyakkyawan ingancin yanayin zafi ya sa ya zama ingantaccen kayan watsar da zafi. Abin da ya fi ban mamaki shi ne cewa ƙimar haɓakar haɓakar thermal na kore siliki carbide shine kawai 4.0 × 10⁻⁶ / ℃, wanda ke nufin yana da kyakkyawan kwanciyar hankali lokacin da zafin jiki ya canza, kuma ba zai haifar da nakasu a bayyane ba saboda haɓakawar thermal da ƙanƙancewa.
3. Fitaccen kwanciyar hankali na sinadarai
Dangane da kaddarorin sinadarai, koren siliki carbide yana nuna rashin ƙarfi sosai. Zai iya tsayayya da lalata yawancin acid, alkalis da mafita na gishiri, kuma zai iya zama barga ko da a yanayin zafi. Gwaje-gwaje sun nuna cewa koren silicon carbide na iya ci gaba da samun kwanciyar hankali mai kyau a cikin yanayin da ke ƙasa da 1000 ℃, wanda ke sa shi yuwuwar amfani da dogon lokaci a cikin mahalli masu lalata.
4. Abubuwan lantarki na musamman
Koren silicon carbide babban abu ne mai faɗin bandgap semiconductor mai faɗin bandgap na 3.0eV, wanda ya fi girma fiye da 1.1eV na silicon. Wannan fasalin yana ba shi damar jure mafi girman ƙarfin lantarki da yanayin zafi, kuma yana da fa'idodi na musamman a fagen na'urorin lantarki. Bugu da kari, koren silicon carbide kuma yana da babban motsi na lantarki, wanda ke ba da damar haɓaka na'urori masu saurin gaske.
3. Shiri tsari na kore silicon carbide micropowder
Shirye-shiryen koren silicon carbide micropowder yafi ɗaukar tsarin Acheson. Wannan hanyar tana haɗa yashi quartz da coke na man fetur a cikin wani ƙayyadadden rabo kuma yana dumama su zuwa 2000-2500 ℃ a cikin tanderun juriya don amsawa. The blocky koren silicon carbide generated da dauki shan matakai kamar murkushe, grading, da pickling a karshe samu micropowder kayayyakin na daban-daban barbashi masu girma dabam.
A cikin 'yan shekarun nan, tare da ci gaban fasaha, wasu sababbin hanyoyin shirye-shirye sun fito. Chemical tururi ajiya (CVD) na iya shirya high-tsarki nano-sikelin kore silicon carbide foda; Hanyar sol-gel na iya sarrafa daidaitaccen girman barbashi da ilimin halittar foda; Hanyar plasma na iya samun ci gaba da samarwa da inganta ingantaccen samarwa. Waɗannan sabbin matakai suna ba da ƙarin dama don haɓaka aiki da faɗaɗa aikace-aikacen micropowder silicon carbide kore.
4. Main aikace-aikace yankunan kore silicon carbide micropowder
1. Daidaitaccen niƙa da goge goge
A matsayin babban abrasive, koren silicon carbide micropowder ana amfani dashi sosai a cikin daidaitaccen sarrafa simintin carbide, tukwane, gilashi da sauran kayan. A cikin masana'antar semiconductor, ana amfani da foda mai tsabta koren siliki carbide don goge wafers na siliki, kuma aikin yankan sa ya fi na al'adar abrasives na al'ada. A cikin fagen sarrafa kayan aikin gani, koren silicon carbide foda zai iya cimma rashin ƙarfi na nano-sikelin da kuma saduwa da buƙatun sarrafawa na ingantattun abubuwan gani na gani.
2. Manyan kayan yumbura
Green silicon carbide foda shine muhimmin albarkatun kasa don shirye-shiryen yumbu mai inganci. Tsarin tukwane tare da kyawawan kaddarorin inji da kwanciyar hankali na thermal ana iya yin su ta hanyar matsi mai zafi ko matakan ɓacin rai. Irin wannan nau'in yumbura ana amfani dashi sosai a cikin mahimman abubuwan haɗin gwiwa kamar hatimin injina, bearings, da nozzles, musamman a cikin matsanancin yanayin aiki kamar zafin jiki da lalata.
3. Electronics da semiconductor na'urorin
A fagen kayan lantarki, ana amfani da foda na silicon carbide koren don shirya kayan ƙaramin bandgap mai faɗi. Na'urorin wutar lantarki da ke kan koren siliki carbide suna da mitoci, ƙarfin ƙarfin lantarki, da halayen aiki masu zafi, kuma suna nuna babban yuwuwar a cikin sabbin motocin makamashi, grids mai kaifin baki da sauran fagage. Nazarin ya nuna cewa na'urorin wutar lantarki na silicon carbide kore na iya rage asarar kuzari da fiye da 50% idan aka kwatanta da na'urorin tushen silicon na gargajiya.
4. Ƙarfafa haɗin gwiwa
Ƙara koren siliki carbide foda azaman lokacin ƙarfafawa zuwa ƙarfe ko matrix polymer na iya haɓaka ƙarfi, taurin da juriya na kayan haɗin gwiwa. A cikin filin sararin samaniya, ana amfani da abubuwan haɗin silicon carbide na tushen aluminum don kera sassa sassa masu nauyi da ƙarfi; a cikin masana'antar kera motoci, silikon carbide ƙarfafa birki gammaye yana nuna kyakkyawan juriya mai zafi.
5. Refractory kayan da coatings
Yin amfani da kwanciyar hankali mai zafi na koren silicon carbide, za'a iya shirya kayan aiki mai ƙarfi. A cikin masana'antar narkewar ƙarfe, tubalin siliki carbide na jujjuyawa ana amfani da su sosai a cikin kayan zafi masu zafi kamar tanderun fashewa da masu juyawa. Bugu da ƙari, suturar siliki na carbide na iya ba da kyakkyawar lalacewa da kariya ga kayan tushe, kuma ana amfani da su a cikin kayan aikin sinadarai, injin turbine da sauran filayen.