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CERAMIC PRODUCT
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CERAMIC PRODUCT

                  

 

       1. SPECIFICATION

Item

Unit

Steel

Si3N4

ZrO2

Al2O3

Density

g/cm3

7.85

3.20-3.30

6.05

3.95

Thermal Expansion Coefficient

10-6/k

10.0

3.2

10.5

9.1

Elastic Modulus

GPa

208

300-320

210

380

Possion Ratio

 

0.30

0.26

0.30

0.27

Hardness

(HV)

 

700

1500-1800

1200

1800

(HRC)

 

62

75-80

70

80

Bending Strength(800℃)

MPa

2400

200

300

220

Crushing Strength(800℃)

MPa

--

1400

2100

1500

Fracture Toughness

MPa.m1/2

25.0

6.0-7.0

10.0

3.5

Thermal Conductivity(500℃)

W/mk

30-40

18

2

25

Specific Resistivity(600℃)

Ω.mm2/m

0.1-1

1018

1015

108

Max Usage Temperature

300

800

550

1850

Corrosion Resistance

 

Worse

Better

Better

Better

Fatigue Stress Recycles(50% Fail)

Times

107

107~109

105

-

Dimension Stablity with Temperature

 

Large

Little

-

-

Centrifugal Force

 

Large

Little

Large

Medium

Non-Lubrication Friction

 

Large

Little

Little

Little

Magnetism

 

Exist

Naught

Naught

Naught

Failure Mode under Rolling Contract

 

Flake

Flake

Smash

Smash

OTHER SPECIFICATIONS CAN BE DISCUSSED AS PER BUYER’S OPTION

       2. PACKING

PLASTIC FILM (INNER LAYER) AND CARTON BOX OR PLYWOOD CASE (OUTER LAYER)

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