properties

R-SiC

S-SiC

Porosity (%)

≤0.3

≤0.2

Density (g/cm3)

3.05

3.1~3.15

Hardness

110~125 (HS)

2800 (kg/mm2)

Elastic Modulus (Gpa)

≥400

≥410

SiC Content (%)

≥85%

≥99%

Si Content (%)

≤15%

0.1%

Bend Strength (Mpa)

≥350

450

Compressive Strength (kg/mm2)

≥2200

3900

Coefficient of heat expansion (1/°C)

4.5×10-6

4.3×10-6

Heat resistance (in the atmosphere) (°C)

1300

1600

Test Environment

Corrosive Weight Loss (mg/cm2yr)

Concentration Reagent (wt%)

Temperature

(°C)

R-SIC

S-SIC

98% H2S04

100

50

1.5

50% NaOH

100

1000

2.5

53% HF

100

7

0.2

85% H3P04

100

8

0.2

70% HNO3

100

0.5

0.2

45% KOH

100

1000

0.2

25% HCL

100

0.9

0.2

10% HF plus

57% HNO3

25

1000

0.2