99% 95% Al2O3 Alumina Ceramic Ring
Dense alumina rings for pump seals, insulators and wear seats, in 95% and 99% grades.
- MaterialAlumina ceramic
- SizeCustomized
- ShapeRing
Al2O3 Alumina Ceramic Substrates
Substrates from 0.1mm thick, with in-house laser cutting, drilling, scribing and marking.
| Shape | Custom |
|---|---|
| Material | Alumina |
| Density | 3.8 g/cm3 |
| Working temperature | 1600°C |
| MOQ | 10 pcs |
| Min Thickness | 0.1mm |
| Lead Time | 1-2 days standard size in stock, 5-7 days customized size |
Overview
Ceramic substrates are used in many electronic applications where a thin insulating layer of thermally stable material is required to conduct heat away from electronic components whilst electrically insulating them. Materials are alumina, zirconia, aluminum nitride and silicon nitride. Properties include excellent insulation, high mechanical strength, high thermal conductivity, low expansion coefficient, small dielectric constant, high-temperature resistance, excellent erosion and wear resistance, and good quality in chemical shock heat and cold.
Key Benefits
- Excellent insulation
- High mechanical strength
- High thermal conductivity
- Low expansion coefficient
- Small dielectric constant
- High-temperature resistance
- Excellent erosion and wear resistance
Problems It Solves
- A polymer insulator softens long before the assembly reaches process temperature.
- A ceramic to metal joint has to be gas tight and survive thermal cycling.
Application Scenarios
- Special environment and electronic substrates
- Pump seals
- Wear resistant inserts
- Insulating washers or bushings
- Semiconductor components
- Aerospace components
- Automotive sensors
- Electrical or electronic insulators
Who It Is For
Specifications
| Shape | Custom |
|---|---|
| Material | Alumina |
| Density | 3.8 g/cm3 |
| Working temperature | 1600°C |
| MOQ | 10 pcs |
| Min Thickness | 0.1mm |
| Lead Time | 1-2 days standard size in stock, 5-7 days customized size |
Material Data
| Item | Unit | Typical value |
|---|---|---|
| Physical Properties | ||
| Color | Ivory/Beige | |
| Density | g/cm3 | 3.85 |
| Alumina Content | % | 99% |
| Gas permeability | 0 | |
| Water Absorption | 0 | |
| Mechanical Properties | ||
| MONS' Hardness | Grade | 9 |
| Rockwell Hardness | HRA | 92 |
| Vickers Hardness (Hv50) | Gpa(Kg/mm2) | 15.7 (1600) |
| Flexural Strength (20C) | Mpa | 330 |
| Compressive Strength (20C) | Mpa | 2000 |
| Fracture Toughness (20C) | MPam1/2 | 4 |
| Modulus of Elasticity | Gpa | 350-400 |
| Thermal Properties | ||
| Thermal Conductivity (20C-400C) | W(m.K) | 27.5 |
| Thermal Expansion Coefficient | 10-6/C | 7.6 |
| Thermal Shock Resistance | dT C | 200 |
| Maximum Use Temperature | C | 1650 |
| Electronic Properties | ||
| Dielectric Strength | KV/mm | > 10 |
| Dielectric Constant | Er | 9.1 |
| Dielectric Loss Angle (1MHz) | 0.0002-0.0003 | |
| Volume Resistivity (20C) | ohm.cm | > 10^14 |
Manufacturing Process
Laser Cutting
Laser cutting of ceramic substrates to form any desired shape (cut-outs, outlines). Tolerance +/-0.02mm. Thickness 0.1-2.0mm. Max dimension 150*200mm.
Laser Drilling
Laser drilling of the smallest hole diameters in trepanning or percussion mode. Microvias with diameters down to 100um. Tolerance +/-0.02mm. Min drilling diameter 0.1mm.
Laser Scribing
Laser scribing to generate a defined break line, perforation or groove, for singulation of the substrates. Laser pulse depth 0.1-0.5mm. Max drilling thickness 1.5mm.
Laser Marking
Laser marking to leave permanent marks on the part, including colour change due to chemical or molecular alteration, charring, foaming, melting and ablation.
Quality Control
We promise to provide quality assurance for all products. Parts are inspected according to your drawings and we issue an inspection report with the shipment.
We follow standard packaging protocols to protect your products during transit and provide photographic documentation of the packing and shipping process for your reference. In the event of transportation damage caused by non-human factors, we arrange a free replacement shipment.
From raw material preparation, forming, surface grinding, internal and external diameter grinding, to precision CNC machining, all processes are carried out in house under strict quality control.
Customisation Options
- Size and shape made to your drawing
- Material grade selected against the duty rather than assumed
- Surface finish, including ground and polished faces
- Colour where the material allows it
- Metallizing and plating where the part has to braze into an assembly
Our main business is OEM and ODM. Send your drawing over WhatsApp or email and we will quote the part.
Comparison With Other Materials
| Property | Zirconia | Alumina | Steatite |
|---|---|---|---|
| Flexural strength | Zirconia 800 MPa | 99% alumina 330 MPa | Steatite relatively high |
| Fracture toughness | Zirconia 9.0 MPam1/2 | 99% alumina 4 MPam1/2 | Not published |
| Max use temperature | Zirconia not rated here | 99% alumina 1650C | Steatite 1100C |
| Thermal conductivity | Zirconia 2.5 W(m.K) | 99% alumina 27.5 W(m.K) | Good |
| Density | Zirconia 6.0 g/cm3 | 99% alumina 3.85 g/cm3 | Talc based |
| Dielectric strength | Zirconia not published | 99% alumina >10 KV/mm | Excellent |
Use Guide
- Confirm the fit before you order volumeTake a free sample first. Samples ship in 4 to 7 working days and we do not charge for the part, only the freight.
- Give the critical dimension a toleranceCeramic is ground to size after sintering. Marking one dimension as critical is cheaper than treating them all as critical.
- Handle by the body, not the edgeCeramic is hard but it chips. Zirconia tolerates handling far better than alumina because its fracture toughness is more than twice as high.
- Tell us the duty, not just the shapeTemperature, fluid, load, speed, and whether the part has to insulate or stay non-magnetic, all change which grade we would quote.
Questions About This Part
Can this part be made to our drawing?
Yes. We can supply the products according to the customer's drawings, samples and performance requirement.
What is the minimum order quantity?
10 pcs
How long does a sample take?
Sample delivery is 4 to 7 working days, free of charge, freight not included.
What are the payment terms?
Payment up to 1000 USD is 100% in advance. Above 1000 USD it is 50% T/T in advance with the balance before shipment.
How will the parts be packed?
We follow standard packaging protocols and provide photographic documentation of the packing and shipping process for your reference.
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Get A Price On Al2O3 Alumina Ceramic Substrates
Send the drawing, the quantity and the duty. Samples are free and take 4 to 7 working days.