Tus txheeb ze cov molecular loj yog 140.28. Nws zoo nkaus grey, dawb, lossis greyish-dawb. Qhov no sib xyaw no yog cov khoom siv kub siab thaum tsis muaj melting taw thiab muaj zog tiv taus cov high-kub nkag. Lub load softening point ntawm cov tshuaj tiv thaiv-sintered silicon nitride (SI3N4) tsis muaj xyoob ntoo yog siab dua 1800 degree. Nws belongs rau Hexagonal Crystal system, thiab cov muaju yog hexagonagical. Qhov ceev ntawm cov tshuaj tiv thaiv-sintered siintered si3n4 ranges los ntawm 1.8 rau 2.7 g / cmÃ, thaum uas kub-nias los ntawm 3.12 mus rau 3.22 g / cm³. Nws mohs hardness yog 9-9.5, vickers hardness yog kwv yees 2200, thiab microhardness yog 32,630 mpa. Lub ntsiab lus melting yog qhov siab heev, tshaj 2000 degree.
Qhov tshwj xeeb cua sov muaj peev xwm {0. 71 J / (G / (G--751. 57 kj / mol. Nws cov thermal conductivity nyob ntawm 2 mus rau 155 w / (map k), thiab cov coefficient ntawm linear nthuav yog 2.8-3.2 × 10⁻⁶ / degree (20-1000 degree). Nws yog insoluble hauv dej tab sis yaj nyob rau hauv hydrofrofluoric acid. Nws pib oxidize nyob rau hauv huab cua ntawm qhov kub ntawm 1300 degree thiab 1400 degree. Qhov tiv taus yog 1.4 × 10 ω ω ω ω ω ω ω ω ω ω × × 10 × 10⁸ · M ntawm 500 degree. Elastic modulus yog nruab nrab ntawm 28,420 thiab 46,060 MPa, thiab lub zog compressive yog 490 MPa (rau cov khoom siv tshuaj tiv thaiv-sintereded cov khoom). Thaum muaj 1285 degree, nws muaj kev cuam tshuam nrog dicalcium nitride (ca₂n₂) los ua CCAACE sicicon nitride, thiab nyob rau qib 600, nws txo cov hlau me, tso cov roj nitrogen oxides. Nws khoov tau lub zog yog 147 mpa. Silicon nitride tuaj yeem tsim los ntawm cua sov silicon hmoov hauv nitrogen lossis los ntawm reacting silicon halides nrog ammonia. Qhov tiv thaiv yog nyob nruab nrab ntawm 10¹⁵ thiab 10¹⁶ ω ω ω. Silicon Nitride tuaj yeem siv los ua cov khoom siv raw rau cov khoom kub-kub ceramics.
