Conditioner & amplifier

Aluminium Oxide (Al2O3) Ceramics Material

 

 

Typical Capability of 95% Al2O3

Content of Al2O3
95 %
Density
3.6 g/cm 3
Hardness
>86 HRa
Porosity Rate
0.08
Water Absorption
0.02
Flexural Strength
330 MPa
Max. Use Temperature
1100-1600 ℃

95% Al2O3 is a versatile ceramic material with many practical applications. We can provide ceramic products with external roughness:0.2-0.3, flatness: <= 0.6u, toleranc:+/-0.03mm, Max. diameter:80mm, length:<100mm products. We are specialized in supplying all kinds of products according to customers’ requirement.

Typical Capability of 99%Al2O3

Type
Al2O3
Reinforced Al2O3
Content (%)
99.9
Al 87, Zr 13
Density (g/cm 3 )
3.9~4.0
4.0~4.1
Hardness (HRA)
80~90
90~92
Flexural Strength (MPa)
300
350

Proper process leads to a microstructure in which nanosized zirconia particles are uniformly dispersed in alumina. The size of zirconia particles can be increased by controlling the sintering cycle. Excellent strength and toughness are obtained.

 

Specification of Alumina

Material

99%Al2O3

95%Al2O3

92%Al2O3

75%Al2O3

Material Characteristics

Density

g/cm 3

3.9

3.7

3.4-3.7

3.2-3.4

Water Absorption

%

0

0

<0.5

<1

Sintering Temp.

1750

1650

1580

1360

Mechanical
Characteristics

Vickers Hardness

Mohs

12

10

12

10

Flexural Strength

kg/mm 2

3300

3000

2900

3800

Compressive Strength

kg/mm 2

28000-30000

25000-28000

25000

20000

Thermal Characteristics

Thermal Conductivity

25 W/mk

300 W/mk

31.4

15.9

21.8

12.6

15-20

6-7

Max. Use Temp.

 

1600

1500

1500

1300

Coefficient of linear Thermal Expansion

x10-6/

6.4-8.2

5.5-7.5

7-7.6

7.3

Electrical
Characteristics

Dielectric Constant

(E)1MHz

9.2-11

9.4-9.8

9.2

8.3-9

Dielectric Loss Angle

tg δ1MHz

1-1.5

2-3.1

4

5-10

Volume Resistant
20

300

500

Ohmcm

>10 14

10 14

10 11

>1014

1013

3.1x1010

>1014

1013

1010

>1014

1012

109

Dielectric Constant

KV/mm

10

10

10

10

 

 

 

 

 

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