Textile Machinery Ceramic Accessories
Alumina yarn guides and eyelets in standard D6*5 to D10*10 sizes or to your drawing.
- MaterialAlumina
- ColorPink, white, red, black
- SizeD6*5 D8*8 D4*3 D9*9 D10*10 or custom
99% 95% Al2O3 Alumina Ceramic Ring
Dense alumina rings for pump seals, insulators and wear seats, in 95% and 99% grades.
| Material | Alumina ceramic |
|---|---|
| Size | Customized |
| Shape | Ring |
| Density | 3.10-3.15 g/cm3 |
| Rockwell Hardness | ≥ 92HRA |
| Modulus of Elasticity | 410 Mpa |
| Maximum use temperature | 1600°C |
Overview
Alumina ceramic (Aluminum Oxide or Al2O3) is an excellent electrical insulator and one of the most widely used advanced ceramic materials. Additionally, it is extremely resistant to wear and corrosion. Alumina components are used in a wide range of applications such as electronics, pump components and automotive sensors.
Key Benefits
- High hardness
- High strength
- Wear resistance
- Corrosion resistance
- High temperature resistance of 1600 degrees
- Good heat dissipation
- Good insulation performance
- High cost performance
Problems It Solves
- A polymer insulator softens long before the assembly reaches process temperature.
- Yarn cuts a groove into a metal guide, and the groove then cuts the yarn.
- 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
| Material | Alumina ceramic |
|---|---|
| Size | Customized |
| Shape | Ring |
| Density | 3.10-3.15 g/cm3 |
| Rockwell Hardness | ≥ 92HRA |
| Modulus of Elasticity | 410 Mpa |
| Maximum use temperature | 1600°C |
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
- Material And Drawing ReviewWe start from your drawing, sample or performance requirement and confirm which of the five material families fits the duty.
- Powder Preparation And FormingDry pressing, hot pressing or injection moulding, chosen by the shape and the wall thickness of the part.
- High Temperature SinteringParts are sintered to full density. Zirconia reaches 6.0 g/cm3 and 99% alumina reaches 3.85 g/cm3.
- Grinding Polishing And CNCSurface grinding, internal and external diameter grinding and precision CNC machining bring the part to final size and finish.
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?
MOQ depends on the size and the forming route. Send the drawing and we will confirm it with the quotation.
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.
Related Products
Refractory Alumina Ceramic Tube
Furnace work tubes and thermocouple protection tubes rated to 1650°C.
- ColorWhite, pink
- Density3.85 g/cm3
- MONS' HardnessGrade 9
Al2O3 Alumina Ceramic Substrates
Substrates from 0.1mm thick, with in-house laser cutting, drilling, scribing and marking.
- ShapeCustom
- MaterialAlumina
- Density3.8 g/cm3
99% Al2O3 Alumina Ceramic Sheet Blank Plate
Injection moulded 99% alumina blanks and finished plates, MOQ 1 piece.
- SizeCustomized
- ColorWhite, black
- MOQ1 pcs
Related Reading
- Zirconia Or Alumina Which To SpecifyToughness against hardness, cost and temperature
- Alumina 95% Or 99% PurityWhat the extra four percent changes
- Steatite For Electrical InsulationWhy heating elements still use talc ceramic
- Sending A Drawing For A Ceramic PartWhat we need to quote accurately
Related Services
Get A Price On 99% 95% Al2O3 Alumina Ceramic Ring
Send the drawing, the quantity and the duty. Samples are free and take 4 to 7 working days.