Alumina Ceramic Plates (Al2O3 ): Kiln Furniture, Setter Plates & Insulation Boards
ADCERAX is a China-based alumina plate manufacturer and supplier delivering factory-direct alumina ceramic plates with engineering support. Our alumina plates are used for electrical insulation, heat treatment and laboratory work, in 96%, 99%, 99.5% and 99.7% Al₂O₃, with thicknesses from 0.1–50 mm and formats up to 1000 × 1000 mm.
Standard sizes and custom machining are available, and we review your drawing to confirm feasibility and a typical lead time before quotation — so international buyers get plates matched to the application, with consistent quality from prototype to repeat production.
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 1730°C
Outstanding dielectric properties
Inert to acids, alkalis, and corrosive media
Alumina Ceramic Plate Benefits & Technical Data
Typical property values for ADCERAX alumina plates in 96%–99.7% Al₂O₃. Figures are reference/typical values; the working temperature, tolerance and surface are confirmed against your drawing and load at RFQ.
Dimensional Stability
Flat, dimensionally stable formats up to 1000 × 1000 mm; warping reviewed against your load and firing profile.
Load-Bearing Strength
Dense alumina carries kiln loading as setter plates and furnace boards; load cases checked at review.
Precision Machining
Ground, lapped or polished surfaces at typical ±0.1 mm; holes, slots and chamfers produced to drawing.
Application Flexibility
Thin plates for insulation and lab carriers; thicker boards for furnace racks, wear linings and assemblies.
Alumina Plate Properties by Purity Grade
| 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 at 25°C [W/(m·K)] | 29 | 27 | 24 | 22 |
| Dielectric Strength (AC-kV/mm) | 22 | 21 | 19 | 15 |
| Volume Resistivity at 20°C (Ω·cm) | >10¹⁴ | >10¹⁴ | >10¹⁴ | >10¹⁴ |
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 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; engineered for dimensional stability under thermal cycling; load and cycle conditions are reviewed at RFQ | 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 general use; 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 | Cost-effective among high-temp ceramic plates; mature supply chain | 96%; standard sizes reviewed per RFQ |
When to Choose Alumina Plates for Your Application?
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.
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
Send your drawing or size, grade and quantity — our engineers review feasibility and lead time before quoting.
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 supply and reliable quality for long-term industrial use.
Alumina Ceramic Disc
Alumina discs offer excellent flatness and thermal stability for electronic substrates and wear parts.
Alumina Sheet
Alumina sheets provide reliable electrical insulation and chemical resistance for linings and harsh environments.
alumina insulation Plate
Lightweight alumina boards provide thermal insulation and strength for furnace linings.
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 furnace linings and thermal barriers.
Alumina Plate Applications
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.
Custom Alumina Plates, Made in China to Your Drawing
ADCERAX is a China alumina plate factory offering direct-from-factory customization. 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 for Alumina Ceramic Plates?
ADCERAX is a dedicated manufacturer and supplier of alumina ceramic plates, focused on factory-direct quality, engineering support and flexible customization. With strict tolerance control and global shipping, we help you source the right Al₂O₃ plates with confidence.
Factory-direct alumina plates with grade, flatness and surface checks on every production batch.
Professional engineering team giving grade, machining and surface advice from prototype to volume production.
Small batches to large-scale runs, with custom sizes, holes, chamfers and tight tolerances.
24-hour inquiry response; common sizes reviewed quickly, custom plates typically in 3–7 weeks.
China Alumina Ceramic Plate Manufacturers-ADCERAX
ADCERAX is a professional China alumina plate manufacturer offering high-performance components with tight tolerances (±0.1 mm) 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 |
FAQs About Alumina Ceramic Plate
ADCERAX supplies alumina ceramic plates 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 right grade depends on your technical needs. As a guide:
- 96% — good mechanical strength; general industrial use, kiln furniture, wear parts.
- 99% — higher hardness and corrosion resistance; electrical insulation plates, structural components.
- 99.5% — high density and stability under load; furnace lining boards, technical ceramics, carriers.
- 99.7% — high thermal and dielectric performance; semiconductor, precision lab substrates, advanced R&D.
Values are typical grade characteristics; the final grade is confirmed against your temperature, load and drawing at RFQ.
Yes. ADCERAX supplies alumina plates in 96%-99.7% purity grades for furnace lining, with good wear resistance and reliable electrical insulation. No-load material limits reach the 1450-1730 C range depending on grade, while the working temperature is confirmed against your load, cycle and atmosphere. Custom machining is available and typical lead time is confirmed at RFQ.
Send your grade, size, thickness, tolerance, surface finish, machining and quantity, with a drawing or CAD file if available. Our engineers review feasibility and typical lead time before quoting. Standard formats are confirmed quickly; custom plates are quoted from drawings.
Yes, we support drawing-based customization from 1 mm thin plates to 1000 x 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 with diamond cutting wheels, laser machining or CNC grinding on professional equipment. Cutting them manually often leads to cracks or breakage. ADCERAX provides custom cutting, drilling and polishing services to hold the required tolerances.
Alumina ceramic plates are machined using specialized equipment such as CNC grinding, laser cutting, drilling and polishing. Typical machining tolerance is +/-0.1 mm, with tighter control on selected dimensions confirmed at drawing review. Because alumina is extremely hard and brittle, machining uses diamond tools and advanced processing. We machine to your drawings or CAD files to meet your industrial requirements.
We control quality through strict raw material selection (96%-99.7% Al2O3), isostatic pressing and high-temperature sintering, and precision machining to a typical +/-0.1 mm tolerance. Every batch is inspected for density, flatness and surface finish, engineered for consistent performance in industrial and laboratory applications.
Typical machining tolerance is +/-0.1 mm on thickness and profile. Tighter control on selected dimensions, hole and slot tolerances of +/-0.1-0.2 mm, chamfers, edge polishing and surface roughness targets are confirmed during drawing review, depending on plate size and process route.
ADCERAX provides datasheets with tolerances, machining options (laser cutting, drilling, slotting) and surface roughness values on request, helping engineers compare grades and select the right plate for their project.
What to Send for an Alumina Plate Quote
To quote a custom alumina plate, send what you have:
- Grade / purity: 96% / 99% / 99.5% / 99.7%
- Dimensions: length, width, thickness, and tolerance
- Shape: square / rectangular / round (Ø)
- Surface: as-fired / ground / polished (flatness or Ra target)
- Machining: holes, slots, chamfers, laser cutting
- Working conditions: temperature, load, environment and application
- Drawing, CAD/DXF, photo or old-part sample; quantity
Alumina plates serve kiln furniture, insulation boards, wear liners and lab carriers. Send your details and our engineers will review the fit before quoting.
*Our team will answer your inquiries within 24 hours.
*Your information will be kept strictly confidential.
info@adcerax.com
Tel:+86-0731-84428843
WhatsApp:+86 19311583352
Within 24 hours
