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95 96 99 Alumina Perforated Ceramic Sheet good electrical insulation

  • 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:
  • 01060

  • HaoRui

  • custom01001

99 Alumina Ceramic Custom Finishing


Alumina Perforated Ceramic Sheet



Alumina ceramic plates are widely used in various industries due to their exceptional properties, including high strength, hardness, and resistance to wear, corrosion, and high temperatures. However, drilling these plates can be challenging due to their hardness and brittleness. Here's a comprehensive overview of alumina ceramic plate drilling:


Drilling Methods:Several drilling methods can be employed for alumina ceramic plates, including:

  1. Diamond Core Drilling: This method utilizes a diamond-tipped core drill bit to create precise holes with minimal damage to the surrounding material.

  2. Ultrasonic Drilling: This technique employs high-frequency ultrasonic vibrations to create holes without generating excessive heat or mechanical stress.

  3. Electro Discharge Machining (EDM): EDM uses electrical discharges to erode the material and create holes with complex shapes and high precision.

Challenges:Drilling alumina ceramic plates poses several challenges, such as:

  1. Brittleness: Alumina ceramics are brittle and prone to cracking or chipping if not handled properly.

  2. Hardness: The high hardness of alumina ceramics requires specialized cutting tools and techniques to avoid premature tool wear.

  3. Heat Generation: Drilling can generate excessive heat, leading to thermal damage and reduced hole quality.

Precautions:To ensure successful and precise drilling of alumina ceramic plates, it's crucial to take the following precautions:

  1. Proper Tool Selection: Use sharp and high-quality diamond-tipped or carbide-tipped drill bits designed for ceramic materials.

  2. Cooling: Employ a coolant or lubricant to minimize heat generation and prevent thermal damage.

  3. Feed Rate and Spindle Speed: Use low feed rates and high spindle speeds to reduce the risk of chipping or cracking.

  4. Support: Provide adequate support to the workpiece to prevent vibrations and ensure stability during drilling.


By understanding the properties, challenges, and precautions associated with alumina ceramic plate drilling, manufacturers can achieve precise and efficient drilling operations, resulting in high-quality products.


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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