Shanghai Gongtao Ceramics Co., Ltd.
Main products:Alumina ceramics,crucible,alumina ceramic tube,zirconia ceramics,zirconia crucible,magnesia crucible,fused quartz crucible,silicone nitride product,boron nitride product,ceramic knife,ceramic bearing,silicone nitride ball,graphite crucible,ceramic heater,
Products
Contact Us
  • Contact Person : Mr. hu guoping
  • Company Name : Shanghai Gongtao Ceramics Co., Ltd.
  • Tel : 86-21-53082298
  • Fax : 86-21-53082308
  • Address : Shanghai,shanghai,Room A135 , No. 668,Beijing East Road
  • Country/Region : China
  • Zip : 200001

Four Hole Round Ceramic Tube Insulators

Four Hole Round Ceramic Tube Insulators
Product Detailed
Four Hole Round Ceramic Tube Insulators 1.Material: 85 - 99.7% alumina ceramic 2.Purpose:used in thermocouple   Four Hole Round Ceramic Tube Insulators

Gongtao company mainly produce alumina tubes, rods and various industrial ceramic parts, which are mainly used in thermalcouple temperature, liquid steel continous temperature, various industrial furnace(containig vacuum furnace, carburizing furnace, wire furnace, atmosphere furnace etc), especially widely used in petrochemical, spinning, electric, instrumentation, mechanical workout, military project etc industry.

Our items are various and exported to many countries.Welcome to contact us!

They are recommended for use in mass spectrometers and other vacuum systems as feed through lines, thermocouple insulators, and in other applications requiring electrical and thermal insulators. Other types are also available - two hole, four hole insulator tubes, and solid rods.

Single bore ceramic beads:

ID

0.2

0.3

1

1

1

1.5

1.5

1.5

2

2

2

OD

0.6

1.5

2

2

2.2

3

3

3

4

4

4

Length

4

2.5

10

10

3.5

4

10

30

4

6

10

 

Double rond bore ceramic beads

ID

2

3

4

6

7

9

1.2

1.2

1.5

2

2

OD

5

7

9

11

13

15

5

5

7

8

9

Length

5

7

9

11

13

15

10

35

10

25

50

 

Oval double bore ceramic beads

Dia of bore

2.5

3.5

3.5

4

4

Long dia.

9

10

10

13

13

Oval dia.

7

8

8

10

10

Length

25

20

20

25

25

Property of material:

Material85 Al2o390 Al2o395 Al2o399 Al2o3
Al2o385%90%93%99.30%
Fe2o3≤ 1.0≤ 0.5≤ 0.5≤ 0.3
Desnsity: g / cm33.43.53.63.85
Vickers Hardness≥ 8.6≥ 8.899
Water Absorption:%≤ 0.2≤ 0.1≤ 0.085≤ 0.01
Refractoriness:°C1580 °C1600 °C1650 °C1800°C
Flexural Strength:Mpa180200240280

Wear Rate( at room temperature, 

erosion, 100 grinding)%

≤ 3≤ 2.5≤ 1≤ 0.5

Other information:

FeatureApplicationMain usage
1.Great mechanical strength

Electric appliance industry                                     

Automotive industry

1.Heat treatment furnace 

and toughened furnace

2.High softening temperature
3.Good resistance to thermal impact
4.Small thermal expansion coefficient 

Mechanical industry              

Engineer industry 

2.Inner liner tube and heating

 tube in electric furnace

5.Good chill and abrupt heat properties
6. Resistance to acid and alkali corrosion

Four Hole Round Ceramic Tube Insulators



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