50.8*50.8 mm Square, Round or Rectangular Electrical Insulating Capacity Alumina Substrate

• Customization: Available
• Application: Industrial Ceramic, Electronic Ceramic
• Material: Alumina Ceramic
• Model NO.: ANSUBSTRATE
• Delivery: 30 Days
• Thermal Conductivity: Min 24 W/Mk
• Young′s Modulus: 340 Gpa
• Forming Method: Tape Casting
• Grain Size: 1-10um
• Purity: 96%, 99.6%
• Type: Ceramic Plates
• Transport Package: by Carton
• Specification: A Pack Of 100 Piece, A Box 17-26kg
• Trademark: Aonuo
• Origin: China
• HS Code: 6909900000
• Production Capacity: 100.000.000 PCS/Year

Product Description

Alumina (Al2O3) Ceramic Substrates

Alumina is the most commonly used technical ceramic material. Thanks to its very good electrical insulation, dielectric strength, and high-temperature resistance up to 1500 °C, Alumina Ceramic is ideal for electrical applications and high-temperature applications.

Alumina ceramics feature:

• Good mechanical strength
• Good heat conductivity and fire resistance
• Good corrosion and wear resistance
• Very good electric insulation

The alumina substrates also possess several unique features:

• Good surface with high smoothness/flatness and less porosity
• High resistance to heat shock
• Low warpage and camber
• Stable in very high temperature and corrosive chemical
• Very stable breaking strength and shape/dimension variance

Applications:
Network resistor, Chip resistor, Chip resistor array, Thick-film hybrid IC, Thin-film hybrid IC, General isolator

Product Parameter
 

Alumina Ceramic Substrate Material Property
Item	Unit		96% Al2O3	99.6% Al2O3
Mechanical Properties
Color	/	/	White	Ivory
Density	Drainage Method	g/cm3	≥3.70	≥3.95
Light Reflectivity	400nm/1mm	%	94	83
Flexural Strength	Three Point Bending	MPa	>350	>500
Fracture Toughness	Indentation Method	MPa·m1/2	3	3
Vickers Hardness	Load 4.9N	GPa	14	16
Young's Modulus	Stretching Method	GPa	340	300
Water Absorption		%	0	0
Camber	/	Length ‰	T≤0.3: ≤5‰, Others: ≤3‰	≤3‰
Thermal Properties
Max. Service Temperature (non-loading)	/	ºC	1200	1400
CTE (coefficient of thermal expansion)	200-800ºC	1×10-6/ºC	7.8	7.9
Thermal Conductivity	25ºC	W/m·K	>24	>29
Thermal Shock Resistance	800ºC	≥10 Times	No Crack	No Crack
Specific Heat	25ºC	J/kg·k	750	780
Electrical Properties
Dielectric Constant	25ºC, 1MHz	/	9.4	9.8
Dielectric Loss Angle	25ºC, 1MHz	×10^-4	≤3	≤2
Volume Resistivity	25ºC	Ω·cm	≥10^14	≥10^14
Dielectric Strength	DC	KV/mm	≥15	≥15

 

Alumina Ceramic Substrate Production Specifications
99.6% Al2O3
Thickness (mm)	Maximum Size (mm)			Shape			Molding Technique
	As Fired	Lapped	Polished	Rectangular	Square	Round
0.1-0.2		50.8	50.8		√	√	Tape Casting
0.25		114.3	114.3		√		Tape Casting
0.38	120	114.3	114.3		√		Tape Casting
0.5	120	114.3	114.3		√		Tape Casting
0.635	120	114.3	114.3		√		Tape Casting
Other special thicknesses within the thickness range of 0.1-0.635mm can be achieved by lapping.
96% Al2O3
Thickness (mm)	Maximum Size (mm)			Shape			Molding Technique
	As Fired	Lapped	Polished	Rectangular	Square	Round
0.25	120	114.3	114.3		√		Tape Casting
0.3	120	114.3	114.3		√		Tape Casting
0.38	140×190			√			Tape Casting
0.5	140×190			√			Tape Casting
0.635	140×190			√			Tape Casting
0.76	130×140			√			Tape Casting
0.8	130×140			√			Tape Casting
0.89	130×140			√			Tape Casting
1	280×240			√			Tape Casting
1.5	165×210			√			Tape Casting
2	500×500			√			Tape Casting
Other special thicknesses within the thickness range of 0.1-2.0mm can be achieved by lapping.

 

Alumina Ceramic Substrate Product Tolerance
Item	Substrate Thickness (mm)	Standard Tolerance (mm)	Best Tolerance (mm)	Laser Cutting Tolerance (mm)
Length And Width Tolerance	/	±2		±0.15
Thickness Tolerance	T<0.3	±0.03	±0.01
	0.30-1.0	±0.05	±0.01
	T>1.0	±10%	±0.01

 

Alumina Ceramic Substrate Surface roughness
Material	Surface Roughness (μm)
	As Fired	Lapped	Polished
96% Al2O3	Ra 0.2-0.75	Ra 0.3-0.7	Ra ≤0.05
99.6% Al2O3	Ra 0.05-0.15	Ra 0.1-0.5	Ra ≤0.05

 

Inspection Of Bare Ceramic Substrates
Test ltems	Inspection Tool	Inspection Standard
Appearance	VisualInspection,Microscope	In accordance with the drawing
Length And Width	Vernier Caliper
Thickness	Thickness Gauge,Micrometer
Camber	Digimatic lndicater
Surface Roughness	Surface Roughness Meter

Production Flow Chart


Product Application


Company Profile

Certification & Patent

Packaging & Warehouse
 

FAQ(Frequently Asked Questions)

Q1. Are you a factory or trading company?
We are a professional ceramic substrate factory with a production capacity of 100 million pieces. All our products are ISO9001 and IATF certified.
Q2. How can you get a quotation?
A: Please send me your drawing with technical requirements and demand quantity. If you don't have the drawing, please kindly courier samples to us. 
Q3. How long is your delivery time?
A: Generally, it takes 5-10 days if the goods are in stock. If customized, it takes around 30 days to dispatch. The package usually includes bubble wrap, a carton, a pallet, a wooden case, etc. 
Q4.Can the Size of the ceramic substrate be Customized?
Yes, most alumina ceramic substrates are rectangular, square, or round. Our rectangular shapes for as-fired alumina ceramic substrates are available up to 190mm×138mm. We offer customized products for special requirements.
Q5.What is the Minimum Thickness of the Alumina Ceramic Substrates?
Our standard thickness: 0.2mm, 0.38mm, 0.50mm, 0.635mm, 0.76mm, 0.89mm, 1.0mm, 1.5mm and 2.0mm. Minimum thickness to be 0.1mm. Welcome to inquire about customized services.

If your question is not listed here, please contact us for more information.