High-Purity 99.1% to 99.9% Alumina Plates
Alumina Ceramic Plates & Substrates
Featuring high purity (99.1% to 99.9%), extreme temperature resistance, high hardness, and excellent electrical insulation. Our plates are highly resistant to chemical corrosion and ideal for demanding applications.
Key Properties of Our 99.5% Alumina Plates
Superior Chemical Inertness
Resists strong acids and alkalis (except HF & hot H₂SO₄), will not oxidize, and does not react with most molten metals, ensuring zero contamination.
Excellent Electrical Insulation
A high-performance substrate material ideal for high-voltage electronic components and precision instruments.
High Hardness & Temp Resistance
Offers extreme hardness (high Mohs) and stable performance at temperatures up to 1700°C, making it perfect for furnace carriers and wear parts.
As-Fired or Precision Ground
We supply standard "as-fired" plates or provide precision lapping/grinding to meet your specific high-flatness and sealing requirements.
Ideal Applications
Ideal Applications for Alumina Plates
Trusted in the most demanding high-tech fields.
Technical Data Sheet
Standard Dimensions & Specifications
We stock a vast range of standard plate sizes (L x W x H). Please contact us for the full dimension list as we finalize our online catalog.
Square & Rectangular Plates
| Length (mm) | Width (mm) | Thickness (mm) | Notes |
|---|---|---|---|
| 36 | 36 | 5 | - |
| 30 | 30 | 3 | - |
| 47 | 47 | 6 | - |
| 50 | 50 | 6 | - |
| 55 | 40 | 4 | - |
| 60 | 30 | 4 | Step Plate (台阶) |
| 65 | 44 | 10 | - |
| 70 | 30 | 7 | - |
| 70 | 70 | 7.5 | - |
| 80 | 80 | 8 | - |
| 90 | 60 | 7.3 | - |
| 90 | 90 | - | Convex (凸) |
| 90 | 90 | 7.5 | As-fired (Unpolished) |
| 98 | 12 | - | - |
| 100 | 30 | 5 | - |
| 100 | 40 | 8 | Step Plate (台阶) |
| 100 | 50 | 9 | - |
| 100 | 100 | 1.1 | - |
| 101 | 101 | 9 | - |
| 120 | 60 | 5.8 | Step Plate (台阶) |
| 120 | 60 | 9 | As-fired (Unpolished) |
| 120 | 80 | - | - |
| 120 | 120 | 8 | - |
| 140 | 140 | 9 | - |
| 146 | 90 | 2.5 | - |
| 150 | 110 | 12 | - |
| 150 | 150 | 12 | - |
| 160 | 140 | 10 | - |
| 160 | 160 | 10 | Step Plate (台阶) |
| 178 | 146 | 11 | - |
| 180 | 180 | 11 | - |
| 190 | 190 | 10.5 | Step Plate (台阶) |
| 200 | 100 | 12 | - |
| 200 | 150 | 13 | - |
| 210 | 190 | 12 | - |
| 210 | 210 | 12 | - |
| 216 | 164 | 13 | - |
| 225 | 225 | 13 | - |
| 233 | 181 | 12.4 | - |
| 250 | 150 | 14 | - |
| 250 | 250 | 13 | - |
| 255 | 255 | - | - |
| 290 | 180 | - | - |
| 300 | 200 | 17 | - |
| 310 | 310 | 6 | - |
| 330 | 110 | 10 | - |
| 330 | 330 | 16 | - |
| 330 | 330 | - | Convex (凸) |
Circular Discs & Plates
| Diameter (mm) | Thickness (mm) | Notes |
|---|---|---|
| 25 | - | - |
| 30 | - | - |
| 50 | 5 | - |
| 50 | 9.5 | - |
| 60 | - | Step Plate (台阶) |
| 60 | 7 | - |
| 63 | 4 | - |
| 70 | 3 | - |
| 70 | - | - |
| 70 | 8 | Step Plate (台阶) |
| 72 | - | - |
| 80 | 6 | - |
| 80 | 7.5 | Step Plate (台阶) |
| 85 | 7 | - |
| 90 | 8 | - |
| 100 | 7.5 | - |
| 100 | 6.5 | Step Plate (台阶) |
| 100 | 13 | - |
| 110 | 7.5 | - |
| 110 | 6.5 | Step Plate (台阶) |
| 115 | 7.5 | - |
| 115 | 7 | Step Plate (台阶) |
| 120 | 7 | - |
| 120 | - | - |
| 130 | 8 | - |
| 130 | 8 | Convex (凸) |
| 137 | 8 | Convex (凸) |
| 140 | 6 | Convex (凸) |
| 150 | 8 | - |
| 150 | 9 | - |
| 157 | 12 | - |
| 158-160 | 12 | - |
| 165 | - | - |
| 168 | 13 | - |
| 180 | 9 | - |
| 185 | 11 | - |
| 200 | 10 | - |
| 200 | - | Convex (凸) |
| 200 | - | - |
| 220 | 13 | Step Plate (台阶) |
| 215 | 19 | Step Plate (台阶) |
| 220 | 19 | Step Plate (台阶) |
Customization
Need a Custom Size Plate? Fast Turnaround.
We precision-cut or grind plates to your exact dimensions. Small batch custom orders can often be shipped in 3-4 business days.
- Precision cutting & grinding to your exact tolerance.
- Custom Length, Width, and Thickness from your CAD drawing.
- Choice of "as-fired" (standard) or "ground" (high-flatness) finish.
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