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Alumina Insulator Tubes


Alumina Thermocouple Insulator Tubes

HIGHLION can produce and supply the alumina thermocouple insulator tubes,the alumina content include 95%,99%,995%,997%, the tube usual outer diameter is 1mm to 8mm,the length max 2500mm, Our alumina insulator are available in 1,2 and 4 holes. Other sizes are also available, we can produce according to customers’ detailed requirements.


Advantages:

@Strictly dimensional tolerance

@Good chemical corrosion resistance

@1800℃ Higher temperature resistance

@Very good thermal shock resistance


Detailed Specifications:

PROPERTY

UNIT

HIGHLIONALUMINA CERAMIC 

Type to DIN EN 60672-3

 

C530

C610

C795

C799

Al2O3 content

%

78

62

95

99.7

Specific gravity

g/cm3

2.5

2.7

3.68

3.82

Water absorption

%

8-12

0

0

0

Hardness

Mohs

6

8

9

9

Modulus of elasticity

Gpa

 

100

280

300

Flexural strength

N/mm2

30

120

280

300

Coefficient of linear expansion

20-100℃

20-300℃

20-600℃

20-1000℃

 

 

 

×10-6/℃

 

3.5-5

3.5-5

4-6

4-7

 

5-6

5-6

5-7

5-7

 

5-7

6-7.5

6-8

7-9

 

5-7

6-8

7-8

7-9

Specific heat (20-100)℃

J/kgK

800-900

850-1050

850-1050

850-1050

Thermal conductivity

W/mk

1.4-2

4-6

16-28

19-30

Maximum thermal stress

K

350

150

140

150

Dialectric strength

KV/mm

 

17

15

17

Max. Temp. Use

1500

1500

1550

1650

Chemical  resistivity

 

satisfactory

Good

Good

Good

Thermal shock resistance

 

Very good

Medium good

medium

Medium