Tus txheeb ze lub cev hnyav yog 14 0. 28. Grey, dawb, lossis tsis dawb. Nws yog qhov kub-kub insoluble compound yam tsis muaj suab nkauj melting nrog lub zog tiv taus rau cov kev kub siab-txias. Softening taw tes nyob rau hauv load ntawm reacted-sintered silicon nitride tsis muaj phau ntawv siab dua 1800 degree; hexagonal system. Lub Crystal muaj lub hexagonal duab. Qhov ntom ntawm SI3N4 tau txais los ntawm cov tshuaj tiv thaiv Sintering yog 1.8 ~ 2.7 g / cm4 tau los ntawm kev nias kub yog 3.12 ~ 3.22 g / cm3. Lub mohs hardness yog 9 ~ 9.5, Vickers Hardness yog li 2200, thiab microhardness yog 32630 mpa. Lub suab me me tau muaj siab heev thiab muaj peev xwm tshaj 2000 degree. Cov cua sov tshwj xeeb yog 0.71 J / (GK).
Qhov kub ntawm tsim yog 751.57 KJ / Mol. Thermal conductivity yog (2-155}) w / (mk). Txoj kab nthuav dav yog 2.8 ~ 3.2 × 10-6 / degree (20 ~ 1000 degree). Insoluble hauv dej. Soluble nyob rau hauv hydroflluoric acid.
Qhov kub ntawm oxidation pib hauv huab cua yog 1300 ~ 1400 degree. Lub ntim resistivity yog 1.4 × 105 m ntawm 20 degree thiab 4 × 108 m ntawm 500 degree. Cov modulus ntawm elasticity yog 28420 ~ 46060.comMpa. Lub zog compressive yog 490 MPa (Rauv Sintering). Nws reacium nitride los ua cov calcium cov tshuaj nyob ntawm 1285 degree, thiab txo cov hlau hloov ntawm 600 degree kom tso cov tshuaj oxides. Lub zog flexural yog 147 mpa. Nws tuaj yeem tsim los ntawm cua sov silicon hmoov hauv nitrogen lossis los ntawm reacting silicon halide nrog ammonia. Qhov resistivity yog 10 ^ 15-10 ^ 16ω.cm. Yuav siv tau los ua cov khoom siv raw rau cov khoom kub-kub.