Cov Khoom Siv Khoom Ntawm Boron Nitride
Apr 29, 2021
CBN feem ntau yog xim dub, xim av lossis tsaus liab ploog ci nrog cov zinc blende qauv nrog cov thermal conductivity zoo. Hardness yog thib ob rau pob zeb diamond, nws yog cov khoom siv super tawv, feem ntau yog siv los ua cov cuab yeej cov cuab yeej thiab cov kev ua kom zoo.
Boron nitride muaj cov cuab yeej ua tshuaj lom thiab tsis corroded los ntawm inorganic acids thiab dej. Lub boron-nitrogen daim ntawv cog lus tau tawg nyob hauv qhov kub kub concentrated alkali. Tshaj saum toj no 1200 ℃, nws yuav pib oxidize hauv huab cua. Lub ntsiab lus melting yog 3000 ° C, thiab nws pib sublimate thaum nws qis dua 3000 ° C. Nws pib ua rau zoo siab ntawm 2700 ° C hauv qab nqus. Kev zom me ntsis hauv cov kua qaub, insoluble hauv dej txias, tus txheeb ze ntom 2.25. Lub zog compressive yog 170MPa. Kev ua haujlwm siab tshaj plaws yog 900 ° C hauv ib qho chaw oxidizing, thaum nws tuaj yeem ncav cuag 2800 ° C hauv qhov chaw tsis muaj zog txo, tab sis kev ua haujlwm lubrication tsis zoo nyob rau hauv chav tsev kub. Feem ntau ntawm cov khoom ntawm boron nitride zoo dua li cov khoom siv carbon. Rau hexagonal boron nitride: tsis tshua muaj kev sib txhuam coefficient, zoo siab kub ruaj khov, zoo thermal poob siab, siab zog, siab thermal conductivity, tsawg nthuav coefficient, hluav taws xob siab resistivity, corrosion kuj, microwave lossis pob tshab Infrared.