Boron carbide (cov tshuaj formula B4C) yog cov khoom siv tawv tawv heev uas siv rau hauv cov ris tsho tank, tsho tiv thaiv mos txwv thiab ntau daim ntawv thov kev lag luam.Nws Mohs hardness yog 9.3, thiab nws yog thib tsib hardest paub tshuaj tom qab pob zeb diamond, cubic boron nitride, fullerene tebchaw thiab pob zeb diamond monolithic hlab.

Cov khoom ntawm B4C

1) Qhov tseem ceeb tshaj plaws kev ua tau zoo ntawm boron carbide yog nyob rau hauv nws txawv txawv hardness (Mohs hardness ntawm 9.3), uas yog thib ob tsuas yog pob zeb diamond thiab cubic boron nitride, thiab yog qhov zoo tshaj plaws high-temperature hnav-resistant khoom;

(2) Qhov ntom ntawm boron carbide yog qhov me me, uas yog lub teeb tshaj plaws ntawm cov ntaub ntawv ceramic thiab tuaj yeem siv rau hauv aerospace teb;

(3) Boron carbide muaj peev xwm nqus neutron muaj zog.Piv nrog cov ntsiab lus ntshiab B thiab Cd, nws muaj tus nqi qis, zoo corrosion kuj thiab zoo thermal stability.Nws yog dav siv hauv kev lag luam nuclear.Boron carbide muaj peev xwm nqus tau zoo neutron.Kev txhim kho ntxiv los ntawm kev ntxiv cov khoom B;

(4) Boron carbide muaj cov tshuaj zoo heev.Nws tsis hnov ​​​​mob nrog acids, alkalis thiab feem ntau inorganic tebchaw ntawm chav tsev kub.Nws tsuas yog corrodes qeeb hauv kev sib xyaw ntawm hydrofluoric acid-sulfuric acid thiab hydrofluoric acid-nitric acid.Nws yog cov cuab yeej tshuaj lom neeg ruaj khov tshaj plaws.Ib qho kev sib xyaw ua ke;

(5) Boron carbide kuj muaj qhov zoo ntawm qhov siab melting point, siab elastic modulus, qis expansion coefficient thiab muaj peev xwm nqus oxygen zoo;

(6) Boron carbide kuj yog cov khoom siv p-hom semiconductor, uas tuaj yeem tswj cov yam ntxwv ntawm cov khoom siv hluav taws xob txawm tias qhov kub siab heev.