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Recrystallized Silicon Carbide Ceramics Products



Recrystallized Silicon Carbide Ceramics Products

Recrystallized Silicon Carbide ceramics are produced from pure silicon carbide powders.Since no binders are added,the manufacturing process requires high sintering temperature (2300-2500 ºC).Absence of binders allows using the materials at temperatures up to (1650 ºC).Recrystallized Silicon Carbide materials have 10-15% of open porosity favoring their high thermal shock resistance.Due to their porosity mechanical strength and corrosion resistance of the materials are lower than those of dense silicon carbide ceramics.


Chemical Composition and Physical Properties


Index

RSIC

NSIC

SISIC

Bulk density(g/cm3)

2.60-2.74

2.75-2.82

>3.02

Porosity (%)

15

10-12

<0.1

Compression strength(MPa)

≥600

600-700

 

Bending strength(MPa)

90-100(20)

 

250(20)

100-120(1100)

160-180(1100)

280(1200)

Young’s modulus(GPa)

280(20)

220-260

 

Thermal conductivity(W/MK)

26(1200)

15(1200)

45(1200)

Thermal expansion(20-1000 oC) 10-6k-1

4.8

5.0

4.5

Max. working temperature(oC)

1650

1500

1380

Moh’s scale of thermal expansion

 

 

13

Si3N4(%)

0

20-30

 

a-SIC(%)

98.5

70-80