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Alumina Ceramic Tubes for Thermocouple

 

Alumina Ceramic Tubes For Thermocouple Uses 

 

HIGHLION can produce alumina ceramic thermocouple tube, the alumina content from 62% to 99.7%, the brand including C530,C610,C795,C799. And shapes including one end closed protection tubes, insulator tubes with two holes, four holes,muti-bores. The alumina ceramic tubes produced by HIGHLION have good abrasion resistance and thermal shock resistance it will not crack under sudden cool and sudden hot enviroment. 

 

Chemical composition and Physical Properties

 

PROPERTY

UNIT

ALUMINA 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