Silicon Nitride Ceramic

Silicon nitride ceramics (Si3N4)

Silicon nitride yog grey ceramic nrog lub siab tawg toughness, zoo heev thaum tshav kub kub poob tsis kam, thiab kuj impenetrable zog rau molten hlau.

Siv cov yam ntxwv no, nws yog siv rau hauv combustion engine qhov chaw xws li tsheb cav qhov chaw, vuam tshuab blowpipe nozzles, thiab lwm yam., tshwj xeeb tshaj yog qhov chaw uas yuav tsum tau siv nyob rau hauv hnyav ib puag ncig xws li overheating.

Nrog nws cov hnav tsis kam thiab siab txhua yam muaj zog, nws cov ntawv thov hauv cov kabmob cov menyuam qhov chaw, rotating ncej bearings thiab cov khoom siv semiconductor ntau lawm cov khoom seem txuas ntxiv.

Lub cev muaj zog ntawm cov khoom siv silicon nitride

Silicon nitride (Sib)

Xim

Dub

Cov ntsiab lus tseem ceeb

-

Main feature

Lub teeb yuag, hnav tsis kam, kub tsis kam.

Kev siv tseem ceeb

Thaum tshav kub kub resistant qhov chaw, hnav resistant qhov chaw, corrosion resistant qhov chaw.

Qhov ntom

g/cc

3.2

Hydroscopicity

%

0

Mechanical yam ntxwv

Vickers hardness

GPa

13.9 Nws

Khoov zog

MPa

500-700

Compressive zog

MPa

3500

Young's modulus

GPA

300

Poisson tus piv

-

0.25

Fracture toughness

MPA · m 1/2

5-7

Thermal yam ntxwv

Coefficient ntawm linear expansion

40-400 ℃

x10-6 ℃

2.6

Thermal conductivity

20 °

W/(m·k)

15-20

Tshwj xeeb kub

J/(kg·k)x103

 

Hluav taws xob yam ntxwv

Volume resistivity

20 ℃

Ω·cm

> 1014

Dielectric zog

 

KV/mm

13

Dielectric tsis tu ncua

 

-

 

Dielectric poob coefficient

 

x10-4

 

Cov yam ntxwv tshuaj

Nitric acid

90 ℃

Poob poob

<1.0<>

Vitriol

95 ℃

<0.4<>

Sodium hydroxide

80 ℃

<3.6<>