Nitr\u00fcr ba\u011fl\u0131 silisyum karb\u00fcr, b\u00fcy\u00fck \u00f6nceden pi\u015firilmi\u015f al\u00fcminyum elektrolitik h\u00fccreler i\u00e7in ideal bir yan duvar malzemesi olu\u015fturan ola\u011fan\u00fcst\u00fc korozyon direnci \u00f6zelliklerine sahip inan\u0131lmaz derecede g\u00fc\u00e7l\u00fc ve sert bir malzemedir.<\/p>\n
\u015eimdiye kadar, silika i\u00e7in oksidasyona kar\u015f\u0131 diren\u00e7li kal\u0131rken y\u00fcksek s\u0131cakl\u0131klarda \u00e7ok y\u00fcksek mukavemet sa\u011flayacak bir ba\u011f \u00fcretme giri\u015fimleri sadece k\u0131smen ba\u015far\u0131l\u0131 olmu\u015ftur.<\/p>\n
Y\u00fcksek s\u0131cak mukavemete, oksidasyona kar\u015f\u0131 m\u00fckemmel dirence ve g\u00fc\u00e7l\u00fc termal \u015fok direncine sahip silisyum karb\u00fcr refrakter g\u00f6vdeler \u00fcretmeye y\u00f6nelik \u00e7ok say\u0131da giri\u015fim, etkisiz kil veya cams\u0131 ba\u011flar \u00fcreten di\u011fer bile\u015fenlerin oksidasyona kar\u015f\u0131 yeterince diren\u00e7li olmamas\u0131 nedeniyle ba\u015far\u0131s\u0131z olmu\u015f ve bu da \u00e7al\u0131\u015fma s\u0131cakl\u0131klar\u0131nda mukavemetin kaybolmas\u0131na neden olmu\u015ftur.<\/p>\n
Bu bulu\u015f, silisyum nitr\u00fcr ba\u011flar\u0131 ile bir arada tutulan silisyum karb\u00fcr tanelerinden olu\u015fan, 1350 derecede ola\u011fan\u00fcst\u00fc y\u00fcksek kopma mod\u00fcl\u00fcne sahip yeni ve geli\u015ftirilmi\u015f bir refrakter malzeme sunmaktad\u0131r. C'de, piyasadaki mevcut y\u00fcksek dereceli silisyum karb\u00fcr refrakterlerin yakla\u015f\u0131k iki kat\u0131d\u0131r.<\/p>\n
Duratec nitr\u00fcr ba\u011fl\u0131 silisyum karb\u00fcr tu\u011fla, t\u00fcnel ve mekik f\u0131r\u0131nlarda yayg\u0131n olarak kullan\u0131l\u0131r ve \u00f6nceden pi\u015firilmi\u015f b\u00fcy\u00fck al\u00fcminyum elektrolitik h\u00fccreler i\u00e7in ideal bir yan duvar malzemesi olarak hizmet eder. Kriyolit korozyonuna kar\u015f\u0131 m\u00fckemmel korozyon direncinin yan\u0131 s\u0131ra \u00fcst\u00fcn e\u011filme mukavemetine sahiptir. Ayr\u0131ca, \u015fekil vermek i\u00e7in y\u00fcksek bas\u0131n\u00e7l\u0131 nitrasyon sinterleme a\u015famas\u0131ndan \u00f6nce titre\u015fimli presleme kullan\u0131labilir.<\/p>\n
Nitr\u00fcr ba\u011fl\u0131 silisyum karb\u00fcr, m\u00fchendislik malzemeleri aras\u0131nda en y\u00fcksek tokluk de\u011ferlerinden birine sahip olmas\u0131yla \u00f6ne \u00e7\u0131kar. Y\u00fcksek s\u0131cakl\u0131klarda s\u00fcr\u00fcnme ve oksidasyona kar\u015f\u0131 direncin yan\u0131 s\u0131ra son derece g\u00fc\u00e7l\u00fc bir mekanik mukavemete sahiptir; ayr\u0131ca SiC ola\u011fan\u00fcst\u00fc k\u0131r\u0131lma toklu\u011fu sa\u011flar ve bu malzemeyi serami\u011fin darbe ve \u015foka direnmesini gerektiren uygulamalar i\u00e7in m\u00fckemmel hale getirir.<\/p>\n
NBSiC termal \u015foka kar\u015f\u0131 son derece dayan\u0131kl\u0131d\u0131r. D\u00fc\u015f\u00fck s\u0131cakl\u0131kta \u00e7ok y\u00fcksek e\u011filme mukavemetine sahiptir ve Blasch i\u015flemi kullan\u0131larak karma\u015f\u0131k \u015fekillere d\u00f6n\u00fc\u015ft\u00fcr\u00fclebilirken, m\u00fckemmel a\u015f\u0131nma direncine sahiptir ve temizlenmesi kolayd\u0131r.<\/p>\n
NBSiC, kriyolit ve Bak\u0131r c\u00fcrufundan kaynaklanan korozyona kar\u015f\u0131 iyi dayan\u0131r ve onu b\u00fcy\u00fck \u00f6nceden pi\u015firilmi\u015f al\u00fcminyum elektrolitik h\u00fccreler i\u00e7in ideal yan duvar malzemesi yapan m\u00fckemmel refrakter \u00f6zelliklere sahiptir. Ayr\u0131ca, \u00e7ok uzun kampanya \u00f6mr\u00fc bu \u00f6zelli\u011fi g\u00f6stermektedir; h\u0131zland\u0131r\u0131lm\u0131\u015f bir oksidasyon testine tabi tutuldu\u011funda standart ba\u011fl\u0131 silisyum karb\u00fcr g\u00f6vdeler, kaliteleri zamanla bozulduk\u00e7a zamanla a\u011f\u0131rl\u0131k kazan\u0131r - bu da h\u0131zla bozulduklar\u0131n\u0131n bir g\u00f6stergesidir.<\/p>\n
Nitr\u00fcr ba\u011fl\u0131 silisyum karb\u00fcr y\u00fcksek yo\u011funluk sunarak a\u011f\u0131rl\u0131k azaltman\u0131n kritik oldu\u011fu uygulamalar i\u00e7in uygun hale getirir. Ayr\u0131ca, \u00fcst\u00fcn termal iletkenli\u011fi, 120 dereceyi a\u015fan s\u0131cakl\u0131klarda ekipman \u00e7al\u0131\u015ft\u0131r\u0131rken enerji tasarrufu sa\u011flar.<\/p>\n
NBSiC, kaba silisyum karb\u00fcr taneleri ve ince silika par\u00e7ac\u0131klar\u0131 i\u00e7eren sulu bir bulamac\u0131n mullit veya magnezya gibi refrakter bir ba\u011flay\u0131c\u0131 ile birlikte jelkastlanmas\u0131yla \u00fcretilir, ard\u0131ndan ye\u015fil \u015fekiller \u015fekillendirilir ve gaz halindeki azotun silisyum nitr\u00fcr olu\u015fturmak \u00fczere silisyumla reaksiyona girdi\u011fi bir azot atmosferinde \u0131s\u0131t\u0131l\u0131r.<\/p>\n
Bu reaksiyon, nispeten y\u00fcksek silika i\u00e7eri\u011fine ve \u00e7ok az silisyum nitr\u00fcr i\u00e7eri\u011fine sahip, \u00e7ok y\u00fcksek silisyum ba\u011flanma mukavemeti, m\u00fckemmel termal \u015fok ve korozyon direnci, alkali erozyonuna kar\u015f\u0131 iyi diren\u00e7 ve iyi oksidasyon direnci ile ay\u0131rt edilen bir \u00fcr\u00fcnle sonu\u00e7lan\u0131r - bu da onu \u00e7e\u015fitli end\u00fcstriyel uygulamalar i\u00e7in \u00e7ok y\u00f6nl\u00fc hale getirir.<\/p>\n
Nitr\u00fcr ba\u011fl\u0131 silikon karb\u00fcr, verimli \u0131s\u0131 transferi ve \u00fcretim hatt\u0131n\u0131z boyunca e\u015fit s\u0131cakl\u0131klar i\u00e7in \u00fcst\u00fcn termal iletkenli\u011fe sahipken, a\u015f\u0131nma direnci termokupllar\u0131 a\u015f\u0131nma ve y\u0131pranmaya kar\u015f\u0131 koruyarak onar\u0131m veya ar\u0131za s\u00fcresi masraflar\u0131ndan tasarruf etmenize yard\u0131mc\u0131 olur.<\/p>\n
Nitr\u00fcr ba\u011fl\u0131 silisyum karb\u00fcr, kriyolit ve bak\u0131r c\u00fcruf korozyonuna kar\u015f\u0131 m\u00fckemmel kimyasal dirence sahiptir, bu da onu \u00f6nceden pi\u015firilmi\u015f b\u00fcy\u00fck al\u00fcminyum elektrolitik h\u00fccrelerde yan duvar olarak kullanmak i\u00e7in ideal bir malzeme haline getirir.<\/p>\n
Nitr\u00fcr ba\u011fl\u0131 silisyum karb\u00fcr (NBC), hammaddesi olarak y\u00fcksek dereceli SiC ve end\u00fcstriyel silika tozundan olu\u015fan, titre\u015fimli presleme ile \u00f6zel \u015fekilli \u00fcr\u00fcnler haline getirilen ve ard\u0131ndan kademeli y\u00fcksek bas\u0131n\u00e7l\u0131 nitrasyon sinterleme kullan\u0131larak sinterlenen geli\u015fmi\u015f bir refrakterdir. NBC, y\u00fcksek s\u0131cakl\u0131klarda y\u00fcksek mukavemet, m\u00fckemmel tokluk, d\u00fc\u015f\u00fck genle\u015fme oranlar\u0131, b\u00fcy\u00fck termal iletkenlik oranlar\u0131, k\u00fc\u00e7\u00fck do\u011frusal genle\u015fme katsay\u0131s\u0131 ve iyi a\u015f\u0131nma direnci \u00f6zellikleri gibi \u00e7ok say\u0131da istisnai \u00f6zelli\u011fe sahiptir - geleneksel silisyum karb\u00fcr plakalar ve kordiyerit mullit \u00fcr\u00fcnlerine k\u0131yasla daha hafif, daha g\u00fc\u00e7l\u00fc, deforme olmam\u0131\u015f daha enerji verimli, b\u00f6ylece f\u0131r\u0131n alan\u0131ndan tasarruf sa\u011flayan ve daha uzun \u00f6m\u00fcrl\u00fc olan \u00e7elik, demir d\u0131\u015f\u0131 metalurji ve seramik end\u00fcstrilerinde kullan\u0131m i\u00e7in idealdir. geleneksel silisyum karb\u00fcr plakalar veya kordiyerit mullit \u00fcr\u00fcnlerine g\u00f6re.<\/p>","protected":false},"excerpt":{"rendered":"
Nitride-bonded silicon carbide is an incredibly strong and tough material with exceptional corrosion resistance properties that makes an ideal side wall material for large prebaked aluminum electrolytic cells. Thus far, attempts at producing a bond for silica that would provide very high strength at elevated temperatures while remaining resistant to oxidation have only partially succeeded. …<\/p>\n