Dab tsi Crystals yog Boron Nitride Cov Khoom Siv?
Jan 04, 2022
Cov khoom siv boron nitride yog cov khoom siv lead ua los ntawm nitrogen thiab boron atoms thiab feem ntau tsis tshua muaj kev phom sij rau lub cev dej. Tsis txhob tso cov boron nitride uas tsis muaj tshuaj lom los yog ntau ntau rau cov dej hauv av, cov kav dej lossis cov kav dej phwj tuaj. Cov khoom siv lead ua no yog dab tsi? Hauv qab no yog qhov kev npaj ntawm me me series:
Boron nitride cov khoom muaj tib coefficient ntawm expansion li quartz, tab sis kaum npaug ntawm thermal conductivity. Kuj tseem muaj lubricity zoo ntawm qhov kub thiab txias. Nws yog ib qho zoo heev kub-kub khoom lubricant nrog muaj zog neutron absorption, ruaj khov tshuaj, thiab tshuaj inertia rau yuav luag tag nrho cov hlau molten.
Boron nitride cov khoom yog insoluble hauv dej txias. Thaum dej boils, hydrolysis qeeb heev, ua me me ntawm boric acid thiab ammonia. Tsis hnov mob nrog qaug zog acid thiab lub hauv paus muaj zog ntawm chav tsev kub, me ntsis soluble hauv kub acid. Nws tuaj yeem decomposed tom qab raug kho los ntawm molten caustic soda thiab poov tshuaj hydroxide thiab muaj zog corrosion kuj rau ntau yam inorganic acids, alkalis, ntsev tov, thiab organic solvents.
Boron nitride cov khoom yog cov ntaub ntawv superhard thib ob tsuas yog pob zeb diamond hauv hardness. Nws tsis tsuas yog muaj ntau yam zoo ntawm pob zeb diamond tab sis kuj muaj cov thermal thiab tshuaj lom neeg ruaj khov rau cov hlau pawg hlau. Nws yog dav siv los ua cov ferrous hlau xws li hardened steel, chilled cam khwb cia hlau, thiab tshav kub-resistant alloys.
Cov khoom siv boron nitride tuaj yeem khaws cia rau hauv lub tsev khaws khoom kom muaj cua zoo kom tsis txhob ya raws. Nws yog ib yam tshiab ntawm high-temperature-resistant superhard khoom siv nyob rau hauv lub tsim ntawm xyaum, abrasives, thiab riam.