SIALON

Production Process of CS ~SiAlON & Si3N4~

After Combustion Synthesis, products are crushed into requested particle size

Production Process of CS ~SiAlON & Si3N4~

Product ~SiAlON~

In 1970 SiAlON was developed by Dr.Ohyama & Dr.Jack. Fine Ceramic material, mainly structured by Si-Al-O-N
α type : Mx(Si,Al)12(O,N)16 (0<x≦2)
(M=Li, Ca, Y, RE)
β type : Si6-zAlzOzN8-z(0<z≦4.2)

Feature

  • Low density
  • Low CTE
  • High Stiffness
  • Good strength in High Temp
  • Good corrosion resistance

Application

  • Al molding parts
  • High Temp
  • Parts cutting tools
  • Abrasives
  • Bearing Balls
  • Phosphor for LED

Product ~SiAlON~ Mechanical Strength

SiAlON performs as good mechanical strength as Si3N4

Density (g/cm3)

3.1 ~ 3.2

Color Gray (at powder)
Grayish Black (at sintering)
Thermal Expansion Rate (K1) 3x10-6
Thermal Conductivity (W/mK) 15
Thermal Shock Property (Δ, K): 900
Resistivity (Ωm) 1010
Bending Strength (MPa) 600~900
Tensile Strength (MPa) 300~400
Compressive Strength (MPa) 3500<
Young’s Modulus (GPa) ~280
Fracture Toughness (MPam0.5) 5~7
Vickers Hardness (GPa) 15~18

Product ~SiAlON~ Corrosion Resistance

SiAlON performs superior Corrosion Resistance to Si3N4

Oxidation Resistance 1)

at Dry Environment
(weight increase)

1200℃ (g/m2/100h): 0.5~1
1400℃ (g/m2/100h): 4~6

at N2-3vol%O2-20vol%H2O
(weight increase)
1200℃ (g/m2/100h): ~1
1400℃ (g/m2/100h): 10~20
at Supercritical Water
(weight increase)
400℃/35MPa/1L/min (g/m2/100h): ~400

Corrosion Resistance2)

Environment Temp. Time(h) Result
HCl(33%) Boiling 100 Good
HNO3(69%) Boiling 100 Little Erosion
NaOH(50%) Boiling 100 Good
Aluminum 950℃ 1000 Good
  1. 1) from Akiyama labo on Hokkaido univ.
  2. 2) International Syalon
  3. 3) Patent (JP2010-285323)
  4. 4) K.L. Smirnov et al., Key Eng. Mat., 217(2002)159-164.

SIALON Data Sheet

Data Sheet Download (Excel)