Alumina Ceramic Plates (Al2O3 ): Kiln Furniture, Setter Plates & Insulation Boards
ADCERAX is a China alumina plate manufacturer and supplier delivering factory-direct alumina ceramic plate products with engineering support. Our alumina plates are trusted for electrical insulation, heat treatment, and laboratory use. Standard sizes and custom machining are available in 96%, 99%, 99.5%, and 99.7% Al₂O₃, with thickness from 0.5–20 mm and formats up to 1000 × 1000 mm.
Fast delivery, competitive pricing, and reliable quality make ADCERAX a dependable alumina plate factory partner for international buyers.
1730°C
Max Operating Temp
（99.7% Purity）
with Custom Thickness
Tolerance and Precision Machining (Cutting, Drilling, Chamfering)
Factory Direct Supply
What are Alumina Ceramic Plates?
An alumina plate is a ceramic flat component made from sintered aluminum oxide (Al₂O₃). It is widely used for its high density, strong electrical insulation, and resistance to thermal and chemical attack.
In industrial and research environments, alumina ceramic plates serve as lining plate, insulation plates, setter boards, and laboratory carriers.
Superior wear resistance for demanding applications
Operates reliably up to 1750°C
Outstanding dielectric properties
Inert to acids, alkalis, and corrosive media
Standard Alumina Plates in Stock — 24-Hour Dispatch
The following sizes are available for immediate dispatch. Custom sizes quoted within 24 hours.
| Size (mm) | Thickness | Shape | Grades | Stock Status |
|---|---|---|---|---|
| 100 × 100 | 1 / 2 / 3 / 5 mm | Square | 96%, 99% | ✅ In Stock |
| 150 × 150 | 2 / 3 / 5 mm | Square | 96%, 99% | ✅ In Stock |
| 200 × 200 | 3 / 5 / 10 mm | Square | 96%, 99% | ✅ In Stock |
| 300 × 300 | 5 / 10 mm | Square | 96% | ✅ In Stock |
| Ø50 | 2 / 3 mm | Round | 99%, 99.7% | ✅ In Stock |
| Ø100 | 2 / 3 / 5 mm | Round | 96%, 99% | ✅ In Stock |
Need a size not listed? We manufacture custom plates up to 1000×1000mm in 3-4 weeks.
Alumina Ceramic Plate Benefits & Technical Data
📏 Dimensional Stability
Flatness and thickness uniformity up to 1000 × 1000 mm ensure reliable support during furnace cycles without warping.
🔩 Load-Bearing Strength
Alumina oxide ceramic plates withstand repeated kiln loading, making them ideal as setter plates and furnace boards under high stress.
🔍 Precision Machining
Custom options include laser cutting, drilling, polishing, and slotting. Thin 1 mm alumina ceramic plates serve as insulation, while thicker boards integrate with furnace racks.
⚙️ Industrial Efficiency
Large-area boards reduce the number of supports, improving throughput and enabling smooth scale-up from lab to production.
| Property | 99.7% Al₂O₃ | 99.5% Al₂O₃ | 99% Al₂O₃ | 96% Al₂O₃ |
| Density(g/cm³) | 3.94 | 3.9 | 3.83 | 3.6-3.75 |
| Hardness(Mohs) | 9.1 | 9 | 9 | 8.8 |
| Flexural Strength (Mpa) | 330 | 320 | 300 | 260 |
| Compressive Strength (Mpa) | 2300 | 2300 | 2210 | 1910 |
| Maximum Operating Temperature(°C) | 1730 | 1700 | 1680 | 1450 |
| Thermal Expansion Coefficient(10⁻⁶/°C) | 7.6 | 7.6 | 7.6 | 7.6 |
| Thermal Conductivity (25°C)W/(m·K) | 29 | 27 | 24 | 22 |
| Dielectric Strength (AC-kv/mm) | 22 | 21 | 19 | 15 |
| Volume Resistivity (20°C) | >10¹⁴ | >10¹⁴ | >10¹⁴ | >10¹⁴ |
When to Choose Alumina Plates for Your Application?
🧩When Alumina Plates May Not Be Optimal
If any of the cases below match your process, our engineers can recommend a better-fit ceramic option.
Alumina ceramic plates are the industry standard for flat, load-bearing components in high-temperature and wear-intensive environments. Their combination of dimensional stability, electrical insulation, and chemical resistance makes them irreplaceable in furnace, electronics, and industrial applications.
🧩Alumina Plates Are the Best Choice When
| Your Application Requirement | Why Alumina Plates Excel | Recommended Configuration |
|---|---|---|
| Kiln furniture / setter plates | Dimensional stability at 1400-1700°C; no warping under repeated thermal cycles; supports heavy loads | 96% for cost-effective; 99% for demanding; 5-15mm thick |
| Furnace lining & insulation | Excellent thermal barrier; resists chemical attack from furnace atmosphere | 96% or 99%; 10-20mm thick boards |
| Electrical insulation plates | Volume resistivity >10¹⁴ Ω·cm; dielectric strength 15-22 kV/mm; maintains insulation at high temp | 99% or 99.7%; 1-5mm thick |
| Wear liner plates | Hardness Mohs 9; excellent abrasion resistance; extends equipment life in abrasive environments | 96% for best value; 10-20mm thick |
| Laboratory sample carriers | Chemically inert; flat surface for uniform heating; easy to clean and reuse | 99% or 99.7%; 2-5mm thick |
| Electronic substrates (non-DBC) | Good thermal conductivity (20-29 W/m·K); excellent flatness; precision machining available | 96% for standard; 99.7% for demanding; 0.5-2mm thick |
| Vacuum chuck / handling fixtures | Porous versions available for vacuum grip; non-contaminating; thermally stable | Porous alumina; custom machined |
| Budget-sensitive industrial applications | Lowest cost among high-temp ceramic plates; mature supply chain | 96%; standard sizes from stock |
Extreme thermal shock (rapid cycling >300°C/min) — silicon carbide plates
Maximum thermal conductivity needed — consider aluminum nitride substrates
Impact resistance critical — contact us to discuss design modifications
Our engineers provide drawings, machining, and fast quotes.
🧩How to Choose the Right Alumina Plate Thickness
Plate thickness affects load capacity, thermal response, and cost. Here’s a quick selection guide:
| Thickness | Typical Applications | Key Considerations |
|---|---|---|
| 0.5-1.0 mm | Electronic substrates, insulating spacers, thin-film carriers | Fragile; requires careful handling; fast thermal response |
| 1.0-2.0 mm | Circuit board substrates, small component carriers | Balance of strength and thermal performance |
| 2.0-5.0 mm | Lab carriers, R&D fixtures, light-duty setter plates | Good balance of strength, thermal mass, and cost |
| 5.0-10.0 mm | Furnace setter plates, kiln furniture, thermal shields | High load capacity; good for repeated kiln cycles |
| 10-20 mm | Heavy-duty kiln supports, wear liners, structural plates | Maximum load capacity; higher thermal mass (slower response) |
💡 Design Tip: For kiln furniture, thicker plates (5-15mm) resist warping better under repeated cycles. For electronic substrates, thinner plates (0.5-2mm) provide faster thermal response but require careful handling.
🧩Size Selection: Square vs Round Plate
🌟 Alumina Square Plate
- Square / Rectangular: Kiln shelves, liners, substrates with edge constraints
- Available Sizes: 50×50 to 1000×1000 mm
🌟Alumina Round Rod
- Round (Disc): Sample carriers, vacuum chucks, rotary applications
- Available Sizes: Ø10 to Ø300 mm
Alumina Plate Products
ADCERAX supplies alumina ceramic plates in square, rectangular, and round formats for insulation, wear resistance, and furnace lining. Available in 96%–99.7% Al₂O₃, with standard sizes in stock and custom machining for special dimensions. As a China alumina plate manufacturer, we offer factory-direct pricing and reliable quality for long-term industrial use.
Alumina Ceramic Disc
Alumina ceramic discs offer excellent flatness and thermal stability for electronic substrates and high-wear applications.
Alumina Sheet
Alumina sheets provide reliable electrical insulation and chemical resistance for linings and harsh environments.
alumina insulation board/ Plate
Lightweight alumina boards provide thermal insulation and strength for furnace linings and high-temperature applications.
alumina ceramic slice
Alumina ceramic slices offer high purity and tight tolerances for microelectronics and sensor components.
porous alumina plate
Porous alumina plates are ideal for filtration, gas distribution, catalyst support, and separation processes.
Alumina Lining Plate
Alumina lining plates provide reliable wear protection for industrial equipment in abrasive environments.
alumina mosaic plate
Alumina mosaic plates deliver strong wear resistance for protecting chutes and hoppers in high-impact areas.
alumina tlc plates
Alumina TLC plates enable precise, consistent separations for analytical laboratory research work.
alumina ceramic block/ brick
Alumina ceramic blocks and bricks provide strength and thermal stability for furnace construction.
Alumina Foam Filter
Alumina foam filters improve molten metal filtration by removing impurities for higher purity and casting efficiency.
Porous Alumina Vacuum Chuck
Porous alumina vacuum chucks provide precise, gentle handling for semiconductor and optics applications.
alumina fiber board
Lightweight alumina fiber boards provide strong insulation for high-temperature furnace linings and thermal barrier applications.
ADCERAX Supply Factory-Direct Price Alumina Plate and Solve Your Sourcing Challenges
As a China alumina plate manufacturer, ADCERAX offers both stock sizes and drawing-based customization. From 1 mm thin plates to large 1000 × 1000 mm boards, all products are delivered with strict tolerance control. Get a fast quotation directly from our engineering team.
Alumina Plate Applications and Case Studies
Whether you need an alumina plate for electrical insulation, an alumina plate for wear parts, or an alumina plate for furnace lining, our alumina plates adapt to your exact application needs. Their exceptional properties make them indispensable across a wide range of demanding industrial sectors.
Our alumina plates serve as circuit board for microelectronics, providing excellent electrical insulation and heat dissipation. They are vital as insulators in high-voltage systems and are used in the production of heating elements, ensuring reliable performance in sensitive electrical applications.
In mechanical systems, our alumina ceramic plates are widely used as wear parts, significantly extending the life of components like pump components, seals, bearings, and cutting tool inserts.Their superior hardness and wear resistance make them ideal for abrasive environments.
The exceptional corrosion resistance of our al2o3 ceramic plate makes them suitable for components exposed to aggressive chemicals. They are frequently used for crucibles and labware in high-temperature chemical reactions and material processing.
In the precision-demanding semiconductor industry, alumina oxide ceramic plate are utilized for wafer processing equipment and vacuum components, where their purity and stability are paramount.
Alumina Plate Applications
Alumina Plate Application Case Studies
Case 1: Kiln Furniture Upgrade — Ceramics Manufacturer, Germany
- Application: Setter plates for firing electronic ceramics at 1350°C, 4 cycles/day
- Challenge: Previous plates warped after 6 months, causing product defects and yield loss
- Solution: 99% Al₂O₃ plates, 300×300×10mm, ground flat to ±0.1mm
- Results: Plate life extended to 2+ years. Product reject rate reduced from 4% to 0.8%. Annual savings: €35,000.
Case 2: Wear Liner Replacement — Mining Equipment, Australia
- Application: Chute liners in mineral processing, abrasive ore handling
- Challenge: Steel liners worn through in 8-10 weeks, causing frequent downtime
- Solution: 96% Al₂O₃ mosaic liner plates, 50×50×15mm tiles, epoxy-bonded
- Results: Liner life extended to 18+ months. Maintenance downtime reduced by 85%.
Case 3: Electrical Insulation — Transformer Manufacturer, USA
- Application: High-voltage insulation plates in dry-type transformers
- Challenge: Previous material showed dielectric breakdown at elevated temperatures
- Solution: 99.7% Al₂O₃ plates, 150×100×3mm, polished surfaces
- Results: Zero dielectric failures in 3 years of operation. Operating temperature capability increased by 80°C.
China Alumina Plates Customized supplier
ADCERAX is a China alumina plate factory offering factory-direct pricing and customized solutions. From 1 mm thin plates to large 1000 × 1000 mm boards, we provide custom machining—cutting, drilling, and polishing—to match your exact application needs.
Customization Options
Extra-large / Extra-small diameters, non-standard thicknesses, and ultra-long / ultra-short lengths.
Provide higher - level dimensional accuracy and concentricity control than the standard.
Flanges, steps, threads, drilling holes, grooves, etc.
Adjust the material according to the application requirements.
Polish and grind the surface to achieve a specific surface roughness.
Customization Process
Send us your drawing, CAD file, or physical sample with material grade, dimensions, tolerances, and quantity. Our engineers will evaluate the design and provide a detailed quotation with lead time and pricing.
Once the quote is approved, we proceed with sample prototyping (1–50 pcs) if needed, for testing and validation.
After sample approval or direct confirmation, we begin batch manufacturing using CNC machining, sintering, and polishing. All parts undergo dimensional checks, material purity testing, and surface finish inspection.
Finished products are securely packed and shipped via DHL/FedEx/UPS or your preferred method. We support global delivery with full documentation.
Why Choose ADCERAX as Your Alumina Ceramic Plate Wholesale?
ADCERAX is a dedicated manufacturer and supplier of alumina ceramic plates, focused on delivering factory-direct quality, fast lead times, and flexible customization. With strict tolerance control and global shipping support, we make it easy for you to source the right Al₂O₃ plates with confidence.
Competitive pricing with strict quality control from raw material sourcing to final delivery
Professional team providing comprehensive technical support and collaborative design
Small batch orders to large-scale production with complex geometries and tight tolerances
24-hour response and 24-hour dispatch for standard items, 3-7 weeks for custom orders.
China Alumina Ceramic Plate Manufacturers-ADCERAX
ADCERAX is a professional China alumina corundum plate factory and wholesaler that offers high-performance components with tight tolerances (±0.1mm) and custom geometries. Using advanced forming methods and CNC machining, we deliver precision-engineered solutions for electronics, chemical, and high-temperature applications.
- 99.7% high-purity alumina for stable performance
- Custom parts based on your drawings or samples
- Fast prototyping (7–15 days) & flexible MOQ
- ISO-compliant quality control & inspection reports
- Direct engineering support from design to delivery
Alumina Plate Machining
This section outlines our core machining strengths, from material grades and tolerance control to advanced forming and finishing methods. We deliver customized alumina plate solutions to meet diverse industrial needs with precision and reliability.
Upload your drawing and we’ll quote machining cost and lead time within 24 hours.
| Category | Details | Tolerance / Finish |
|---|---|---|
| Material Grades | 96%, 99%, 99.5%, 99.7% Al₂O₃ for different purity and performance requirements | — |
| Forming Methods | Dry pressing, isostatic pressing, extrusion, casting, injection molding | — |
| General Tolerance | Suitable for precision assemblies | Up to ±0.1 mm |
| Processing Methods | CNC machining, laser cutting, drilling, fine grinding, chamfering, polishing | Depends on process |
| Surface Finish | Polished / Unglazed / Glazed | Depends on requirement |
| Customization | Drawings, CAD files, or samples accepted for custom parts | Per drawing |
| Laser Cutting | Complex shapes, slots, and patterns | ±0.1 mm |
| Drilling | Through holes, blind holes, and countersinks | ±0.1–0.2 mm |
| Surface Grinding | Flatness and thickness control | Flatness ≤0.05 mm/100 mm |
| Edge Chamfering | 45° chamfers and radius edges | Per drawing |
| Polishing | Mirror finish available | Ra 0.2–1.2 μm, up to Ra ≤0.4 μm |
Alumina Plates Quality & Certifications
FAQ
ADCERAX supplies al2o3 alumina ceramic plate in 96%, 99%, 99.5%, and 99.7% Al₂O₃, covering both standard and high-purity requirements for insulation, wear resistance, and high-temperature use.
The choice of alumina plates quality depends on your technical needs and budget. Lower purities are more cost-effective, while higher purities deliver maximum thermal and chemical stability for advanced processes. See the comparison below:
| Purity Level (Al₂O₃) | Key Advantages | Typical Applications | Cost Level |
|---|---|---|---|
| 96% | Good mechanical strength, stable performance | General industrial use, kiln furniture, wear parts | ★ Low |
| 99% | High hardness, improved corrosion resistance | Electrical insulation plates, structural components | ★★ Medium |
| 99.5% | High density, low impurities, stable at high load | Furnace lining boards, technical ceramics, carriers | ★★★ Mid-High |
| 99.7% | Excellent thermal resistance up to 1700 °C, dielectric strength >10 kV/mm | Semiconductor manufacturing, precision lab substrates, advanced R&D | ★★★★ Premium |
👉 Need advice on selecting the right alumina purity grade? Share your drawings or specifications with ADCERAX, your China alumina plate manufacturer, and get a 24h quotation with factory-direct pricing.
Yes. ADCERAX has alumina plate for sale in 96%–99.7% purity grades, engineered for furnace lining with excellent wear resistance, high thermal stability up to 1730 °C, and reliable electrical insulation. Custom machining and fast delivery are available
The cost depends on purity (96%–99.7% Al₂O₃), size, thickness, and machining complexity. Standard alumina plates range from low-cost stock items to high-precision custom plates. Send us your drawing or specifications for a quick quotation.
Yes, we support drawing-based customization from 1 mm thin plates to 1000 × 1000 mm large boards, with machining options such as laser cutting, drilling, and polishing.
Alumina ceramic plates are very hard and brittle, making them difficult to cut with standard tools. For precise results, they should be processed using diamond cutting wheels, laser machining, or CNC grinding under professional equipment. Attempting to cut them manually often leads to cracks or breakage. ADCERAX provides custom cutting, drilling, and polishing services, ensuring tight tolerance control and clean edges for your specific application.
Alumina ceramic plates are machined using specialized equipment such as CNC grinding, laser cutting, drilling, and polishing. These methods ensure precise tolerance control, typically within ±0.05–0.1 mm, and clean surface finishes. Because alumina is extremely hard and brittle, machining requires diamond tools and advanced processing techniques. At ADCERAX, we provide custom machining services based on your drawings or CAD files to deliver alumina plates that meet exact industrial requirements.
At ADCERAX, we ensure alumina plates quality through strict raw material selection (96%–99.7% Al₂O₃), advanced isostatic pressing and high-temperature sintering, and precise machining with ±0.05–0.1 mm tolerance. Every batch is inspected for density, flatness, and surface finish to guarantee consistent performance in industrial and laboratory applications.
Standard alumina plates are produced with ±0.1 mm thickness tolerance. For custom machining, we can achieve tighter control depending on plate size. Typical options include hole or slot tolerance ±0.1–0.2 mm, chamfer and edge polish customization, and surface roughness (Ra) ≤ 1.2 μm. These tolerances ensure reliable fit in assemblies and precise integration into industrial equipment.
ADCERAX provides datasheets with details of tolerances, machining options (laser cutting, drilling, slotting), and surface roughness values upon request. This helps engineers compare alumina plate quality and select the right grade for their project.
Get in touch with us
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