Silicon carbide yokhala ndi mphamvu ya mlengalenga ndi carbide yopanda chitsulo yokhala ndi silicon ndi carbon covalent bond, ndipo kuuma kwake ndi kwachiwiri kwa diamondi ndi boron carbide. Fomula ya mankhwala ndi SiC. Makristalo opanda mtundu, abuluu ndi akuda akamasungunuka kapena kukhala ndi zonyansa. Kusintha kwa silicon carbide yokhala ndi kapangidwe ka diamondi nthawi zambiri kumatchedwa emery. Kuuma kwa emery kuli pafupi ndi diamondi, kukhazikika kwa kutentha kwabwino, kukhazikika kwa hydroxy acid aqueous solution ndi concentrated sulfuric acid, komanso kusasunthika kwa mixed acid kapena phosphoric acid ya concentrated hydrogen acid ndi nitric acid. Alkalis omwe amasungunuka mumlengalenga wopanda kanthu amasiyana. Amagawidwa mu synthetic silicon carbide ndi natural silicon carbide. Natural silicon carbide, yotchedwa carbonite, imapezeka makamaka mu kimberlite ndi volcanic amphibolite, koma kuchuluka kwake ndi kochepa ndipo kulibe phindu lofukula.
Silikoni carbide yopangidwa ndi mphamvu ya mafakitale ndi yosakaniza ya -SiC ndi -SiC ndipo imabwera mumitundu iwiri: yakuda ndi yobiriwira. Silikoni carbide yoyera ndi yopanda mtundu, yokhala ndi zonyansa ndi zakuda, zobiriwira, zabuluu, zachikasu. Malire a hexagonal ndi cubic grain, kristalo ndi mbale, ndi column compound. Kunyezimira kwagalasi, kuchuluka kwa 3.17 ~ 3.47G/CM3, kuuma kwa Morse 9.2, maikulosikopu ilinso pa 30380 ~ 33320MPa melting point: atmospheric 2050 inayamba kusiyanitsa, atmosphere yobwezeretsa 2600 inayamba kusiyanitsa. Coefficient yotanuka ndi 466,480 MPa. Mphamvu yokoka ndi 171.5MPa. Mphamvu yokakamiza ndi 1029MPa. Coefficient yowonjezereka yolunjika ndi (25 ~ 1000)5.010 ~ 6/. Kuyendetsa kutentha (20) ndi 59w/(mk). Kukhazikika kwa mankhwala, kuwira mu HCl, H2SO4, HF sikudzawonongeka.
Malinga ndi ntchito zosiyanasiyana, silicon carbide yoponderezedwa ndi mpweya imagawidwa m'magulu awiri: abrasive, refractory data, deoxidizer, silicon carbide yamagetsi ndi zina zotero. SiC mu abrasive silicon carbide siyenera kukhala yochepera 98%. Refractory silicon carbide imagawidwa m'magulu awa: (1) advanced refractory data black silicon carbide, SiC yake ndi yofanana ndi silicon carbide yopukutira. (2) Secondary refractory data black silicon carbide, SiC imakhala yoposa 90%. (3) Silicon carbide yakuda ndi SiC m'malo otsika kwambiri si yochepera 83%. Silicon carbide ndi SiC zomwe zimagwiritsidwa ntchito mu deoxidizer nthawi zambiri zimafunika kukhala zopitirira 90%. Komabe, carbon industrial graphitization furnace insulation, silicon carbide yokhala ndi 45% ya mankhwala ingagwiritsidwenso ntchito ngati deoxidizer yopanga zitsulo. Silicon carbide ya deoxidizing agent ili ndi mitundu iwiri ya ufa ndi molding block. Ufa wa deoxidizer wakuda wa silikoni carbide nthawi zambiri umakhala ndi kukula kwa tinthu tating'onoting'ono ta 4 ~ 0.5 mm ndi 0.5 ~ 0.1 mm.
Silikoni carbide yamagetsi ili ndi magulu awiri akuluakulu
(1) Kabide wobiriwira wa silicon womwe umagwiritsidwa ntchito potenthetsera zinthu zamagetsi ndi wofanana ndi kabide wobiriwira wa silicon womwe umagwiritsidwa ntchito popera.
(2) Silicon carbide ya arrester ili ndi zofunikira zapadera zamagetsi, zomwe zimasiyana ndi silicon carbide yakuda yopera deta yotsutsa.
Kugwiritsa ntchito silicon carbide yopangidwa ndi mlengalenga
Zinthu zopangidwa ndi silicon carbide zoponderezedwa ndi mpweya zili ndi ntchito zapadera monga kukana kutentha kwambiri, kukana kuvala, kukana kutentha, kukana moto, kukana kuwala kwa dzuwa, kuyendetsa bwino magetsi ndi kutentha, ndi zina zotero, ndipo zakhala zikugwiritsidwa ntchito kwambiri m'madipatimenti osiyanasiyana azachuma cha dziko. Ku China, silicon carbide yobiriwira imagwiritsidwa ntchito kwambiri ngati chopopera. Silicon carbide yakuda imagwiritsidwa ntchito popanga miyala yopera, yomwe nthawi zambiri imagwiritsidwa ntchito kudula ndi kupera zinthu zomwe zimakhala ndi mphamvu zochepa zomangika, monga galasi, zoumba, miyala, zotsalira, komanso popera ziwalo zachitsulo ndi zinthu zopanda chitsulo. Kupera kopangidwa ndi silicon carbide yobiriwira kumagwiritsidwa ntchito kwambiri popera carbide yopangidwa ndi simenti, titanium alloy, galasi lowala, komanso popera silinda ndi zida zachitsulo zothamanga kwambiri. Cubic silicon carbide abrasives imagwiritsidwa ntchito kokha popera ma bearing ang'onoang'ono molondola kwambiri. Kukana kuvala kwa ma impeller a turbine kumatha kusinthidwa kwambiri poika ufa wa SIC pa iwo mwa electroplating. Pogwiritsa ntchito mphamvu ya makina kukankhira chitoliro cha cubic SiC200 ndi ufa wa W28 micro-ufa pakhoma la silinda la injini yoyaka mkati, moyo wa silinda ukhoza kuwirikiza kawiri.
Nthawi yotumizira: Juni-16-2023