Kodi ng’anjo ya muffle ndi chiyani?

Zinthu zotenthetsera za ng’anjo ya muffle zimaphatikizapo mawaya a ng’anjo yamagetsi, ndodo za silicon carbide, ndi ndodo za silicon molybdenum.

Waya wa chitofu chamagetsi:

Waya wa ng’anjo yamagetsi amapangidwa ndi mawaya a iron-chromium-aluminium ndi nickel-chromium electric heat alloy waya. Mphamvu ya waya wa ng’anjo imayang’aniridwa ndi kompyuta, ndipo imavulazidwa ndi makina omangirira othamanga kwambiri. Zimaphatikizapo mawaya a ng’anjo yamagetsi yachitsulo-chromium-aluminium alloy ndi mawaya ang’anjo amagetsi a nickel-chromium alloy. Choyambirira ndi chopangidwa ndi alloy chopangidwa ndi ferrite, ndipo chomalizacho ndi chopangidwa ndi austenite. Waya wa ng’anjo yamagetsi ya chromium-aluminium alloy ndi nickel-chromium alloy electric ng’anjo waya ali ndi malo osungunuka pansi pa 1400 ℃, ndipo nthawi zambiri amakhala pa kutentha kwambiri (malo otentha) pansi pa ntchito, ndipo amatha kukhudzidwa ndi okosijeni. m’mlengalenga ndi kuwotcha Zoyipa.

Silicon carbide ndodo:

Ndodo za silicon carbide ndi zooneka ngati ndodo komanso ma tubular osakhala achitsulo otenthetsera kutentha kwamagetsi opangidwa ndi chiyero chobiriwira chobiriwira cha hexagonal silicon carbide monga zida zazikulu. M’mlengalenga wokhala ndi okosijeni, kutentha kwanthawi zonse kumatha kufika 1450 ℃, ndipo kugwiritsa ntchito mosalekeza kumatha kufikira maola 2000. Ndodo za silicon carbide ndi zolimba komanso zowonongeka, zosagwirizana ndi kuzizira kwambiri komanso kutentha kwachangu, sizimapunduka mosavuta pa kutentha kwakukulu, ndipo zimagwiritsidwa ntchito pa kutentha kwakukulu. Iwo ali ndi makhalidwe a kutentha kwambiri kukana, kukana makutidwe ndi okosijeni, kukana dzimbiri, kukwera msanga kutentha, moyo wautali, pang’ono kutentha mapindikidwe, unsembe yabwino ndi kukonza, etc., ndipo ndi wabwino Kukhazikika Chemical.

Komabe, silicon carbide rod element imatha kukhala ndi zotsatirazi ndi mpweya ndi nthunzi yamadzi ikagwiritsidwa ntchito kwa nthawi yayitali kuposa 1000 ℃:

①Sic+2O2→Sio2+CO2 ②Sic+4H2O=Sio2+4H2+CO2

Zotsatira zake, zomwe zili mu SiO2 muzinthu zimawonjezeka pang’onopang’ono, ndipo kukana kumakula pang’onopang’ono, komwe kumakalamba. Ngati nthunzi wamadzi wachuluka, umalimbikitsa okosijeni wa SiC. H2 yopangidwa ndi machitidwe a formula ② imaphatikizana ndi O2 mumlengalenga kenako imakumana ndi H2O kupanga bwalo loyipa. Chepetsani moyo wamagulu. Hydrogen (H2) imatha kuchepetsa mphamvu yamakina a gawolo. Nayitrogeni (N2) pansi pa 1200 ° C ingalepheretse SiC ku oxidizing ndi kuchitapo kanthu ndi SiC pamwamba pa 1350 ° C, kotero kuti SiC ikhoza kuwola ndi klorini (Cl2) ndi Sic ikhoza kusungunuka kwathunthu.

Silicon molybdenum ndodo:

Ndodo za silicon molybdenum zimatha kugwiritsidwa ntchito pa kutentha kwa ng’anjo ya 1600 ° C-1750 ° C. Amagwiritsidwa ntchito kwambiri muzitsulo, magalasi, zoumba, zoumba, maginito, zipangizo refractory, makhiristo, zida zamagetsi, kupanga ng’anjo ndi zina. Amagwiritsidwa ntchito popangira kutentha kwambiri kwa zinthu * Chotenthetsera choyenera.

Ndodo ya silicon molybdenum imayang’aniridwa ndi mpweya wotentha kwambiri wa oxidizing, ndipo gawo lotetezera la quartz limapangidwa pamwamba kuti liteteze ndodo ya silicon molybdenum kuti isapitirire oxidize. Pamene kutentha kwa chigawochi kuli kwakukulu kuposa 1700 ° C, chigawo chotetezera cha quartz chimasungunuka, ndipo chigawocho chikupitirizabe kugwiritsidwa ntchito mumlengalenga wa oxidizing, ndipo chitetezo cha quartz chimapangidwanso. Ndodo za silicon molybdenum siziyenera kugwiritsidwa ntchito kwa nthawi yayitali pamtunda wa 400-700 ℃, apo ayi zigawozo zidzakhala ufa chifukwa cha okosijeni wamphamvu pa kutentha kochepa.