Custom Alumina Ceramic Slices & Washer Rings for Insulation, Spacing and Fixturing

Alumina Ceramic Slice Applications

• Power Electronics & Electrical Insulation

  Alumina slices and insulating washers keep clamping stacks electrically isolated and dimensionally stable in power modules, relays, terminals and high-voltage assemblies. Defined thickness and flatness hold clamp force and creepage distance steady, and polished faces support clean thermal-interface contact. Tell us the voltage, temperature and stack drawing - the grade and finish are confirmed at review.

• Furnace, Heater & Sensor Assemblies

  In furnaces, cartridge and strip heaters and thermocouple or sensor assemblies, alumina washers and spacer rings isolate live elements, set distances at terminals and survive heat that destroys mica, polymer and metal washers. Share the working temperature, element or probe size and the old-part photo; replacement washers are reviewed from photos and key dimensions.

• Fixtures, Tooling & Wear Interfaces

  As shims, spacers and wear pads in machine tooling and assembly fixtures, alumina parts hold gauge distances where metal shims wear or corrode. Laser IDs and lot marks keep set-ups traceable. Send the stack-up drawing with load and contact conditions to confirm thickness, bow limit and edge treatment.

Alumina Ceramic Slice Usage Instructions

• Use

  a. Always handle alumina ceramic slices with nitrile or latex gloves to prevent fingerprints, oil, or ion contamination.
  b. Place slices only on lint-free, anti-static mats; avoid rough or metallic surfaces that may scratch polished faces.
  c. Do not apply point loads or force directly on edges; always use distributed pressure clamping to avoid micro-cracks.
  d. Follow the recommended torque sequence during assembly to ensure stress is evenly distributed across the slice.
  e. For thin slices (<0.5 mm), use carrier trays or backing plates during handling to minimize flexural stress.

• Storage

  a. Keep slices in original interleaf paper, vacuum pouches, or cavity trays to maintain separation and avoid stack rubbing.
  b. Store in a dry, dust-free environment with stable temperature (15–30 °C) and controlled humidity (<60% RH).
  c. For long-term inventory, add desiccant bags or silica gel packs and use sealed vacuum packaging to prevent moisture uptake.
  d. Avoid direct sunlight, corrosive chemicals, or strong airflow that can introduce dust and accelerate surface degradation.
  e. Maintain batch separation with clear labeling to ensure traceability of thickness tolerance and lot numbers.

• Cleaning

  a. Use neutral detergent or isopropyl alcohol (IPA) with lint-free wipes for safe surface cleaning.
  b. Air-dry slices in a particle-controlled area; avoid compressed air unless filtered and oil-free.
  c. For polished surfaces (Ra ≤0.1 µm), avoid abrasive cleaners or pads, which can compromise flatness.
  d. Ultrasonic cleaning may be applied for unpolished slices but should be avoided for thin or edge-sensitive parts.
  e. After cleaning, store slices in interleaf or cushioned trays to avoid scratches from re-contact.

• Common Mistakes & Fixes

  a. Edge impacts → Use chamfered edge options and cushioned packaging; train operators to handle with carriers.
  b. Thickness mix-up → Specify laser-engraved IDs or lot codes; always separate storage by labeled trays.
  c. Surface scratches → Request polished face orientation and interleaf separation; prohibit sliding slices against each other.
  d. Moisture exposure → Use vacuum-sealed bags with desiccants; avoid storing in humid or unsealed cabinets.
  e. Improper clamping → Adopt torque-limited drivers and soft fixture pads; prevent over-tightening that causes micro-cracks.
  f. Static charge accumulation → Use anti-static mats and grounded trays to minimize electrostatic attraction of dust.

Alumina Ceramic Slice FAQ

1. Q: How do I request a quotation for an alumina ceramic slice or washer?
   A: Send a drawing or old-part photos with OD / ID/thickness (or outer size for discs), tolerance and flatness needs, edge style, surface finish (Ra), material grade, working temperature and medium, and quantity. Our engineers first confirm what can be made, then quote.
2. Q: What drives alumina ceramic slice price differences?
   A: Tighter thickness bands, polished faces, micro-hole geometry and edge-chip limits increase cycle time and yield requirements, affecting unit price.
3. Q: Can I buy alumina ceramic slices in small lots?
   A: Yes. ADCERAX supports small-lot purchases of standard alumina ceramic slices for trials, and custom shapes can start with samples before moving to batch orders.
4. Q: Do you support customized alumina ceramic slice?
   A: Yes. ADCERAX offers customized alumina ceramic slices with options for holes, slots, chamfers, laser-marked IDs, and surface finishes, all produced according to your drawing-based tolerances.
5. Q: Do you offer alumina ceramic slice promotions?
   A: Yes. ADCERAX provides alumina ceramic slice promotions for bulk procurement and repeat orders. Long-term partners can benefit from volume-based discounts, while project-based customers may receive trial-lot incentives before batch production.
6. Q: Are you an alumina ceramic slice manufacturer or just a supplier?
   A: ADCERAX is a China-based factory-direct manufacturer. Slices, discs and washer rings are formed, sintered, machined and inspected within one manufacturing chain, and every drawing is reviewed by engineering before quotation.
7. Q: Where can I purchase an alumina ceramic slice?
   A: ADCERAX is a sales alumina ceramic slice manufacturer, supplying round, square, and other shapes of fair-priced alumina ceramic slices for both standard stock and custom orders. Standard inventory can be shipped quickly and delivered worldwide.
8. Q: Is this part a washer, a spacer ring or an insulating washer?
   A: They are the same family of flat alumina rings named by function: washers distribute load, spacer rings set distance, insulating washers isolate live or hot components, and support rings back up gaskets or seal faces. Tell us the assembly role and we will confirm the right geometry and edge treatment - complete mechanical seal rings and stepped shoulder washers are separate product lines.
9. Q: Which alumina grade should I choose - 96%, 99% or 99.7%?
   A: As typical industry guidance: 96% alumina covers most insulation and structural duties at balanced cost; 99% suits higher temperature, voltage or cleanliness demands; 99.7% is chosen for high-purity, high-temperature or contamination-sensitive duty. The working grade is confirmed against your temperature, voltage and medium at engineering review.
10. Q: Can you replace a broken or discontinued ceramic washer from an old part?
    A: Often yes. Send clear photos of the old part with measured OD, ID and thickness, plus the working temperature and what failed. We review feasibility, flag chipping or tolerance risks before quoting, and machine the replacement to drawing - we do not promise a drop-in replacement without this review.