Customized High Purity Annular Ceramic Gasket Ceramic Ring Factory

Customized High Purity Annular Ceramic Gasket Ceramic Ring Factory

Product Description

Our Alumina Gasket are manufactured from high-purity 96% or 99% alumina ceramic. These products offer excellent high-voltage insulation, as well as superior resistance to high temperatures, wear, and chemical corrosion. They are widely used for electrical isolation and positioning in applications such as energy storage converters, wind power converters, data center power supply systems, and high-temperature instrumentation. We offer custom sizing, precision grinding, and specialized contour machining based on your drawings. We also supply small-batch R&D samples and MRO spare parts to address insulation and wear challenges in power electronics equipment.

Product Key Advantages

1. High Insulation Reliability: features with high volume resistivity and excellent dielectric strength, making it suitable for high-voltage insulation and power electronics applications.

2. High-Temperature Thermal Stability: capable of long-term operation in high-temperature environments; offers superior thermal shock resistance compared to most plastics and metals.

3. High Hardness and Wear Resistance: boasts a Mohs hardness of approximately 9, making it ideal for friction components, positioning pads, and anti-wear spacers.

4.Dimensional Stability and Precision Machinability: enables high flatness, low surface roughness, tight tolerances, and complex, non-standard geometries.

5.Corrosion Resistance and Cleanliness: resistant to most acids, alkalis, and organic media; low contamination risk, making it suitable for semiconductor, medical, and vacuum environments.

Typical Performance Range

Note: The above figures represent typical ranges; actual values ​​depend on purity, density, porosity, thickness, and testing conditions. Careful assessment is required regarding resistance to hydrofluoric acid, hot concentrated strong alkalis, and fluoride molten salts.

Specifications and Tolerance Capabilities

1. Thickness: 0.2–10 mm (standard); multi-layer composites or custom thicker structures available; brittleness and warpage must be assessed for ultra-thin sheets.
2. Shape: discs, squares, rings, parts with holes/slots, stepped designs, and irregular profiles; customization based on drawings or samples is supported.
3. Typical Tolerances: dimensions ±0.02–±0.10 mm; thickness ±0.01–±0.05 mm; flatness and parallelism controlled per drawing specifications; precise control of hole positions and slot widths.
4. Surface Quality: ground finish Ra 0.2–0.8 μm; polished finish up to Ra ≤0.05 μm; options include sandblasting, chamfering, radiusing, cleaning, and cleanroom packaging.

Forming and Processing

Dry pressing is suitable for small-to-medium-sized batch components; isostatic pressing is ideal for high-density, highly uniform parts; tape casting is used for thin sheets; and injection molding is suitable for small, complex components. Post-sintering processes include cutting, grinding, lapping, polishing, and drilling/slotting; laser marking, metallized brazing bases, or Au/Ni plating can be applied when necessary.

Typical Applications

1. Insulating and thermally conductive pads/spacers for IGBTs, MOSFETs, power modules, and RF devices
2. Insulation and gaskets for semiconductor equipment, vacuum chambers, and electrostatic chuck assemblies
3. Insulating, positioning, and heat-dissipating spacers for LED, laser, and sensor packaging
4. Insulating gaskets for high-temperature flanges, valves, furnace observation windows, and thermocouple ports
5. Mechanical anti-wear pads, bearing spacers, mold positioning pads, and precision gauge blocks

Selection Recommendations

Select components based on a comprehensive assessment of operating voltage/insulation class, temperature and thermal cycling, medium corrosivity, mechanical loads and impact, dimensional tolerances, surface roughness, and requirements for metallization or plating. For high-voltage insulation, prioritize high-purity (99.5%) material with sufficient thickness; for high heat flux density applications, evaluate both thermal conduction paths and contact thermal resistance; and for conditions involving frequent disassembly or impact, incorporate chamfers to reduce stress concentrations and avoid interference fits.

Quality and Delivery

Incoming material batches are fully traceable, with testing provided for density, hardness, dimensions, appearance, and essential electrical or thermal properties. RoHS/REACH compliance, material composition reports, and dimensional CPK data can be supplied upon request. Packaging utilizes shatter-resistant dividers and moisture-proof/anti-static materials; services include small-batch prototyping, rapid prototyping, and annual framework supply agreements.

Customization Process:

Requirements Discussion → Material and Structural Design → Drawing Confirmation → Prototyping and Validation → Small-Batch Trial Production → Mass Delivery and Continuous Improvement

RFQ

1.What are the minimum thickness and maximum dimensions for your ceramic gasket? What tolerances can you achieve?

   Thin parts starting from 0.2 mm; shapes determined by equipment capabilities; tolerances: ±0.02–±0.10 mm for shape, ±0.01–±0.05 mm for thickness.

2.Can you handle irregular shapes, cutouts, steps, and chamfers?

    Yes,we can.CNC machining, laser cutting, and grinding are all suitable options; it is recommended to replace sharp corners with rounded ones to prevent edge chipping.

3.Can the surface be polished? What is the roughness?

  Grinding achieves Ra 0.2–0.8 μm; polishing can reach Ra ≤0.05 μm.

4.How much do the samples cost? What is the lead time for producing samples?

   Quotation based on drawings; 7–15 days for simple parts, 20–30 days for complex parts or those requiring molds.

5.What is the MOQ for bulk orders? What are the price tiers?

   The minimum order quantity (MOQ) typically ranges from 500 to 5,000 pieces, depending on the manufacturing process and dimensions; the unit price decreases as the order volume increases.

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