Performance

Unit Symbol

Boron Carbie B4C

Alumina 99AI2O3

Toughened Alumina ZTA-20%

Zirconia ZrO2

Silicon Nitride Si3N4

Silicon Carbide SiC

Density ρ

g/cm3

2.4~2.51

3.7~3.99

5.5

6

3.2

3.2

Hardness

kg/mm

2700~3200

2300~2700

1470~1500

1300~1500

1700~2700

2350~2450

Bending Strength σB

Mpa

350~400

300~400

700

1000~1500

900

450~800

Compressive Strength

Mpa

1800~2500

2800~3500

2000

2000

3500

2250~3000

Fracture Toughness

Mpa.m-3/2

6

2~4

5~6

11

7

4~5

Weber Modulus

Gpa

>7

>10

>15

>15

>6

Elastic Modulus Et

Gpa

407

260

210

320

410

Poisson’s Ratio

0.2

0.23

0.3

0.26

0.16

Heat rise Coefficient α

X10-6/℃

4.5

6.5~8.6

9.4

10.5

3.2

4.3

Thermal Shock

△T℃

200

470

250

500

350

Resistance

Ω/cm²

0.3~0.8

>10 ¹⁴ ~ 10 ¹⁶

>10 ¹⁰

>10 ¹⁰

>10 ¹⁰

100~2