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| Customization: | Available |
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| Application: | Electronic Devices, Lighting, Power Supply, Semiconductors |
| Material: | Al2O3 |
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We offer aluminum oxide plates in various raw materials, sizes, and shapes. Below is the standard dimensions.
| Aluminum Oxide Plate | |||||||
| 99.6% Al2O3 | |||||||
| Thickness (mm) | Maximum Size (mm) | Shape | Molding Technique | ||||
| As Fired | Lapped | Polished | Rectangular | Square | Round | ||
| 0.1-0.2 | 50.8 | 50.8 | √ | √ | Tape Casting | ||
| 0.25 | 114.3 | 114.3 | √ | Tape Casting | |||
| 0.38 | 120 | 114.3 | 114.3 | √ | Tape Casting | ||
| 0.5 | 120 | 114.3 | 114.3 | √ | Tape Casting | ||
| 0.635 | 120 | 114.3 | 114.3 | √ | Tape Casting | ||
| Other special thicknesses within the thickness range of 0.1-0.635mm can be achieved by lapping. | |||||||
| 96% Al2O3 | |||||||
| Thickness (mm) | Maximum Size (mm) | Shape | Molding Technique | ||||
| As Fired | Lapped | Polished | Rectangular | Square | Round | ||
| 0.25 | 120 | 114.3 | 114.3 | √ | Tape Casting | ||
| 0.3 | 120 | 114.3 | 114.3 | √ | Tape Casting | ||
| 0.38 | 140×190 | √ | Tape Casting | ||||
| 0.5 | 140×190 | √ | Tape Casting | ||||
| 0.635 | 140×190 | √ | Tape Casting | ||||
| 0.76 | 130×140 | √ | Tape Casting | ||||
| 0.8 | 130×140 | √ | Tape Casting | ||||
| 0.89 | 130×140 | √ | Tape Casting | ||||
| 1 | 280×240 | √ | Tape Casting | ||||
| 1.5 | 165×210 | √ | Tape Casting | ||||
| 2 | 500×500 | √ | Tape Casting | ||||
| Other special thicknesses within the thickness range of 0.1-2.0mm can be achieved by lapping. | |||||||
For products that require high dimensional accuracy, we can use various processing methods to process ceramic substrates, such as lapping, polishing, laser scribing, laser cutting, etc.
Laser Processing
(1) Hole Size
| Aluminum Oxide Plate | |
| Hole Diameter (mm) | Standard Tolerance (mm) |
| φ≤0.5 | 0.08 |
| φ>0.5 | 0.2 |
| Aluminum Oxide Plate | |
| Substrate Thickness (mm) | the Percentage of Laser Scribe Line Depth to Thickness (%) |
| 0.2-0.3 | 40%±5% |
| 0.3<T≤0.5 | 50%±3% |
| 0.5<T≤1.0 | 43%±3% |
| 1.2 | 55%±3% |
| 1.5 | 55%±3% |
| 2.0 | 55%+10% |
| The scribing spot can be in different sizes. Generally there are small spot 0.03-0.04mm (Substrate Thickness≤0.5mm ) and large spot 0.08-0.1mm (Substrate Thickness>0.5mm), and the accuracy is ±0.01mm. | |
The aluminum oxide plate has the following advantages:
| 1. High Wear & Chemical Resistance | 2. Heat Resistant | 3. High Mechanical Strength |
| 4. Small Dielectric Loss | 5. Good Thermal Conductivity | 6. High Light Reflection |
| 7. 0% Water Absorption |
For material properties, please refer to the table below.
| Aluminum Oxide Plate | ||||
| Item | Unit | 96% Al2O3 | 99.6% Al2O3 | |
| Mechanical Properties | ||||
| Color | / | / | White | Ivory |
| Density | Drainage Method | g/cm3 | ≥3.70 | ≥3.95 |
| Light Reflectivity | 400nm/1mm | % | 94 | 83 |
| Flexural Strength | Three Point Bending | MPa | >350 | >500 |
| Fracture Toughness | Indentation Method | MPa·m1/2 | 3.0 | 3.0 |
| Vickers Hardness | Load 4.9N | GPa | 14 | 16 |
| Young's Modulus | Stretching Method | GPa | 340 | 300 |
| Water Absorption | % | 0 | 0 | |
| Camber | / | Length‰ | T≤0.3: ≤5‰, Others: ≤3‰ | ≤3‰ |
| Thermal Properties | ||||
| Max. Service Temperature (Non-loading) | / | ºC | 1200 | 1400 |
| CTE (Coefficient of Thermal Expansion) |
20-800ºC | 1×10-6/ºC | 7.8 | 7.9 |
| Thermal Conductivity | 25ºC | W/m·K | >24 | >29 |
| Thermal Shock Resistance | 800ºC | ≥10 Times | No Crack | No Crack |
| Specific Heat | 25ºC | J/kg·k | 750 | 780 |
| Electrical Properties | ||||
| Dielectric Constant | 25ºC, 1MHz | / | 9.4 | 9.8 |
| Dielectric Loss Angle | 25ºC, 1MHz | ×10-4 | ≤3 | ≤2 |
| Volume Resistivity | 25ºC | Ω·cm | ≥1014 | ≥1014 |
| Dielectric Strength | DC | KV/mm | ≥15 | ≥15 |
Beside bare ceramic substrates, we also manufacture metalized ceramic substrates. Metallized ceramics is one of our advantageous products.
Q1: Can I get free samples?
Samples of standard sizes are free, and we only charge for shipping. If customization is required, we only collect sample fee for MOQ.
Q2: How long is the delivery time?
If the product is in stock, we will ship it within 2 days. The standard lead time for other orders is 4-6 weeks.
Q3: What is the depth of the laser scribing?
In terms of aluminum oxide plates, the depth of the laser scribing is about 35%-65% of the plate thickness. The scribing spot can be in different sizes. Generally there are small spot 0.03-0.04mm (Plate Thickness ≤ 0.5mm ) and large spot 0.08-0.1mm (Plate Thickness > 0.5mm), and the accuracy is ±0.01mm.
Q4: How are aluminum oxide plates packaged to avoid breakage?
Because ceramics are hard and brittle materials, each of our products will be packed in a safe and reliable way to avoid damage during transportation.
Q5: Can aluminum oxide plates be polished?
Yes, lapping and polishing will provide the desired flatness and thickness tolerance, with a surface roughness generally below Ra0.05.
If your question is not listed here, please contact us for more information.
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