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Alumina ceramic protective cover 99 porcelain 95 porcelain bear high temperature insulation electronic profiled tubes

  • Very good electrical insulation.
  • Moderate to extremely high mechanical strength.
  • Very high compressive strength.
  • High hardness.
  • Moderate thermal conductivity.
  • High corrosion and wear resistance.
  • Good gliding properties.
  • Low density.
  • Operating temperature without mechanical load 1,000 to 1,700°C.
  • Bioinert and food compatible.
Availability:
Quantity:
  • 01031

  • HaoRui

  • custom01001

The Most Well-known Oxide Ceramic Material



Aluminum Oxide (Al2O3)


Aluminum oxide ceramic tube, also known as alumina ceramic tube, is cylindrical structures made from aluminum oxide (Al2O3) material.

1.Aluminum oxide tubes are made of high-grade alumina, offering superior heat and chemical resistance
2.The design of the alumina tubes allows for maximum air flow and efficient heat transfer
3.They are lightweight and easy to install, making them a great choice for a wide variety of applications.
4.Alumina tubes are designed for durability and long-term use, ensuring you get the most out of your investment.

It is commonly used in various industrial applications such as furnace tubes, thermocouple protection tubes, and insulators. The ceramic tube's excellent mechanical strength and electrical insulation properties make it ideal for harsh environments where high temperatures and chemical exposure are present. Additionally, its ability to withstand extreme conditions while maintaining dimensional stability ensures long-lasting performance. 

Overall, aluminum oxide ceramic tube is a reliable and cost-effective solution for demanding applications in industries such as aerospace, automotive, and electronics.

Any dimension requirement, please contact us.



Properties of Alumina/Aluminum Oxide (Al2O3)


Property
Item
95% Al2O3
99% Al2O3
99.8%Al2O3
Unit
Mechanical Characteristics
Color
White
light yellow
Ivory

Bulk Density
3.7
3.85
3.93
g/cm3
Water Absorption
0
0
0
%
Bending Strength
300
310
370
MPa
Compressive Trength
2,300
2,400
2500
MPa
Elastic Modulus
320
340
390
GPa
Fracture Toughness
3~4
3~4
4
MPa m1/2
Weber Coefficient
12
12
12
m
Vickers Hardness
1,400
1,600
1850
HV 0.5
Thermal Characterics
Coefficient of Line Thermal
Expansion
7~8
7~8
7~8
10-6 K-1
Thermal Conductivity
20
29
32
W/mK
Thermal Shock Resistance
(Put in Water)
250
200
280
ΔT °C
Max Working Temperature
1,500
1,600
1700
°C
Electrical Characteristics
Volume Resistance At 20°C
>1014
>1014
>1014
Ωcm
Dielectric Strength
15×106
15×106
15×106
V/m
Dielectric Constant
9
10
10
εr
One MHZ Dielectric Loss Angle
at 20°C
0.0004
0.0002
0.0001
tanδ
Chemical Characteristics
Nitric Acid (60%) 90°C
0.1
0.1
0.05
24H WT Loss mg/cm2
Sulphuric Acid (95%) 95°C
0.3
0.34
0.22
Caustic Soda (30%) 80°C
0.9
0.95
0.04


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