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99.8% Alumina ceramic discs with hole CNC machining of ceramic parts

  • 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:
  • 01066

  • HaoRui

  • custom01001

99 Alumina Ceramic Custom Finishing


Alumina ceramic discs with hole CNC machining


Alumina ceramic discs with holes are specialized components made from alumina (aluminum oxide) ceramic material that feature one or more perforations or holes. Alumina ceramic discs can be manufactured with precision-drilled or machined holes. These discs are designed for specific applications where the presence of holes serves a particular purpose.


Potential Applications:

1.Sensor Components:

Alumina ceramic discs with holes can find use in sensor assemblies, where they may facilitate the passage of certain substances while providing structural support.

2. Ceramic Filters: 

The discs can be employed as ceramic filters in various industries, such as foundries or metal casting, where      molten metals need to be filtered.

3. Electronic Insulation: 

In electronic applications, these discs can be used as insulating components, providing electrical isolation while allowing for the passage of certain elements like light or gases.

4. Gas Diffusers:  

In applications requiring the diffusion of gases, discs with holes can be used to control and distribute the flow of gases.

5. Support or Spacer Components: 

The discs with holes can serve as support or spacer components in assemblies where separation or positioning of elements is necessary.

6. Fluid Flow Control: 

Alumina ceramic discs with holes can be used in fluid handling systems to control the flow of liquids or gases. The holes can be strategically placed for specific flow patterns.

7. Thermal Insulation Plates: 

Alumina ceramic discs with holes can be used as thermal insulation plates in applications where precise control of heat transfer is required. The holes can contribute to reducing thermal conductivity.


Properties of Alumina material (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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