Alumina Insulation Board/Plate for EMI Shielding & Mechanical Protection

Alumina Ceramic Insulation Board Applications

• Power Electronics Cabinets

  ✅Key Advantages

  1. Integrated Shield Plane: copper-laminated alumina forms a grounded reference, reducing radiated noise hotspots.
  2. Rigid Isolation Spacer: maintains creepage/clearance under torque and temperature, lowering arcing risk.
  3. Repeatable Mounting: tight hole/slot tolerances speed assembly and fixture alignment.

  ✅ Problem Solved

  After replacing FR-4 spacers with alumina boards plus a laminated shield, drive enclosures showed ~4–6 dBμV average reduction in problematic bands during pre-scan, with assembly time down ~12% due to fewer shield brackets. Field rework tickets fell by ~18% over 2 quarters as clearance and fit remained stable under thermal cycling.

• BMS & Energy Storage Racks

  ✅Key Advantages

  1. Thermal/CTE Stability: reduces clamp loss and connector stress across cabinet temp swings.
  2. Localized Shielding: conductive coating with masked insulation gaps builds targeted Faraday sections.
  3. Abrasion-Safe Edges: R-chamfers and deburr minimize cable sheath wear.

  ✅ Problem Solved

  Rack prototypes transitioned to coated alumina dividers with ground lugs, achieving repeatable insulation resistance >10¹² Ω at end-of-line checks and connector wear events down ~30% across 500-hour environmental runs; cabinet EMC retests passed without additional shield frames.

• Industrial Control & Lab Power Systems

  ✅Key Advantages

  1. Flatness-Controlled Panel: improves gasket seal and enclosure continuity.
  2. Bond-Friendly Surface: sandblasted face enhances adhesive and gasket adhesion.
  3. Stable Dielectric Gap: thickness tolerance holds the designed creepage distances.

  ✅ Problem Solved

  A control PSU platform standardized on 3 mm alumina panels (±0.1 mm) with masked conductive coating, cutting fixture re-machining to near zero, while NCRs for edge chips dropped by ~40% quarter-on-quarter; EMC fix time during DVT shortened by ~1.5 weeks.

Alumina Ceramic Insulation Plate Usage Instructions

• Using

  To achieve stable insulation and EMI performance, always verify ground continuity for any laminated or coated shielding layer, and make sure kept-out insulation gaps remain clear according to the drawing. Fasteners should be tightened to the specified torque using insulating washers to avoid local stress points. During assembly, avoid prying or forcing on edges, as this may cause micro-cracks that reduce dielectric strength.

• Storing

  Boards should be kept flat in their original interleaves and never stacked directly with heavy metal parts that may chip or warp the surface. Store them in a dry and dust-free environment, away from conductive particles or metallic debris that could bridge insulation distances. Controlled storage helps maintain dimensional stability and reduces the risk of contamination before use.

• Cleaning

  For routine cleaning, use lint-free wipes and isopropyl alcohol or other approved neutral cleaners. Avoid alkaline or acidic dips that may attack coated areas or lamination interfaces. If a conductive coating is used, re-mask insulation windows before any touch-up or recoating to preserve creepage and clearance safety. Regular inspection under magnification is recommended for assemblies exposed to vibration or high humidity.

• Common Misuse & Fix

  1. Issue: Coating overspray closes an insulation gap → Fix: Re-mask, carefully abrade, and recoat to restore the clearance zone.
  2. Issue: Edge chips from metal-to-ceramic impact → Fix: Use handling trays, specify R-chamfers, and retrain operators on insertion techniques.
  3. Issue: Floating shield not bonded → Fix: Add a ground lug or standoff at the designated copper land to ensure full grounding continuity.
  4. Issue: Over-tightened screws cause stress cracks → Fix: Apply torque control and use insulating washers to distribute load evenly.

Alumina Insulation Board FAQ

1. Q: Is there any data on the dielectric strength of these alumina insulation plates?
   A: The dielectric breakdown strength exceeds 15 kV/mm, suitable for many HV applications.
2. Q: Do alumina insulation boards resist thermal shock?
   A: Moderate resistance is present; rapid temperature >100°C change should be avoided without special design.
3. Q: Are these alumina ceramic insulation boards chemically inert to acids and alkalis?
   A: Yes, alumina ceramic insulation board is stable in most corrosive chemical environments, excluding HF and strong alkali at elevated temperatures.
4. Q: Can alumina ceramic insulation board be laser cut or machined post-production?
   A: Post-sinter machining is supported in-house, but we don’t recommend customers modifying plates themselves due to brittleness.
5. Q: What thickness should I choose for insulation and stiffness?
   A: 1–3 mm works for many cabinets; thicker boards increase rigidity and spacing. Match to creepage/clearance and mounting span.
6. Q: What information speeds up quotation for alumina insulation board?
   A: Overall size, thickness/tolerance, hole map, edge finish, surface finish, shielding layer need (Y/N), target dielectric/IR level, and test notes.

What Our Customers Say about Alumina Ceramic Insulation Board

• ⭐️⭐️⭐️⭐️⭐️
  “The prototypes matched our drawings, and the integrated ground points reduced steps in our EMC test process. It helped shorten our project schedule.”
  -- Elena R., Project Buyer, NorthGrid Energy
• ⭐️⭐️⭐️⭐️⭐️
  “Polished edges and added chamfers prevented small handling damages. We now use the same alumina insulation board across several PSU models with stable results.”
  -- Marc M., Test Systems Lead, Auron Labs
  
• ⭐️⭐️⭐️⭐️⭐️
  “We introduced alumina insulation boards into our cabinet builds, and the stable dielectric strength reduced retesting time. The boards also provided the rigidity we needed for heavy busbars.”
  -- David K., Senior Engineer, PowerGrid Systems
• ⭐️⭐️⭐️⭐️⭐️
  “Ordering custom alumina insulation boards with pre-machined holes saved us a lot of fixture adjustments. Delivery matched the drawings, and our team had fewer assembly issues.”
  -- Sofia L., Procurement Manager, ElectroTech Solutions