99 Alumina 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.

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Model:
01060
Brand:
HaoRui
Code:
custom01001

Product Description

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:

Diamond Core Drilling: This method utilizes a diamond-tipped core drill bit to create precise holes with minimal damage to the surrounding material.
Ultrasonic Drilling: This technique employs high-frequency ultrasonic vibrations to create holes without generating excessive heat or mechanical stress.
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:

Brittleness: Alumina ceramics are brittle and prone to cracking or chipping if not handled properly.
Hardness: The high hardness of alumina ceramics requires specialized cutting tools and techniques to avoid premature tool wear.
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:

Proper Tool Selection: Use sharp and high-quality diamond-tipped or carbide-tipped drill bits designed for ceramic materials.
Cooling: Employ a coolant or lubricant to minimize heat generation and prevent thermal damage.
Feed Rate and Spindle Speed: Use low feed rates and high spindle speeds to reduce the risk of chipping or cracking.
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 m^1/2
	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