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Al2O3 Precision Alumina Ceramic Components/Parts 99 Heating Sleeves

  • 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:
  • 01033

  • HaoRui

  • custom01001

The Most Well-known Oxide Ceramic Material



Aluminum Oxide (Al2O3)


Alumina ceramics are ceramic materials based on alumina (Al2O3) used in thick film integrated circuits. 

Alumina ceramics have good electrical conductivity, mechanical strength and high temperature resistance. It should be noted that ultrasonic cleaning is required. Alumina ceramic is a kind of multifunctional ceramic. Due to its superior performance, it has been widely used in modern society to meet the needs of daily use and special performance.


Alumina ceramics are divided into high purity type and ordinary type.
The Al2O3 content of high purity alumina ceramics is more than 99.9%. Because the sintering temperature is as high as 1650-1990°C and the transmission wavelength is 1 to 6μm, molten glass is generally used instead of platinum crucible. Alkali metal corrosion resistance used as sodium lamp; It can be used as integrated circuit board and high frequency insulation material in the electronics industry.

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Properties of Alumina(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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