RBSN and GPSN ceramic parts as nozzle and bushes with ultra-high hardness and wear-resistance.

Reaction bonded Si3N4 (RBSN)

Density (g/cm3): 2.4-2.7

Hardness (HRA): 81-88

Porosity (%): 10-15

Flexural strength (MPa): 160-210

Anti-striking strength (kgcm/cm2): 1.5-2.0

Thermal conductivity (Cal/s.cm.): 0.0314

Thermal expanding coefficient (1/)(RT-1000): 2.58x10-6

Sintering temperature : 1450-1500

Pressure sintered Si3N4 (GPSN)

Density (g/cm3): 3.18-3.22

Hardness (HRA): 91-93

Porosity (%): 0.1

Flexural strength (MPa): 700-850

Anti-striking strength (kgcm/cm2): 5-7

Thermal conductivity (Cal/s.cm.): 0.0464 (1000)  0.0420 (1200)

Thermal expanding coefficient (1/)(RT-1000): 3.4-3.6x10-6

Sintering temperature : 1700-1900

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