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SINTYRON Insulating 99% Alumina Ceramic Plate Al2o3 Sheet Block for Equipment
99% Alumina Ceramic Block is a high-purity, sintered ceramic component composed of 99% aluminum oxide (Al₂O₃). This composition represents a premium-grade alumina ceramic, offering a superior and balanced profile of mechanical, thermal, and electrical properties, making it suitable for the most demanding industrial environments. The block form factor indicates a substantial, three-dimensional solid geometry, designed for heavy-duty structural or functional applications.
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SINTYRON Insulating 99% Alumina Ceramic Plate Al2o3 Sheet Block for Equipment

Product description:
Alumina plates, made from aluminum oxide (Al₂O₃), are widely used in various industries due to their excellent properties,
including high hardness, thermal stability, and chemical resistance.




Alumina Ceramic Block Information:
| Product | Alumina ceramic block |
| Material | Al2O3 |
| Purity | 95%-99% |
| Color | White/Nylon yellow |
| Shape | Arc/Square/Rectangle/Cylinder/Boat |
| Capacity | 1-2000 ml |
| Density | 3.98 g/cm3 |
| Melting Point | 2020℃ |
| Max. Working Temperature | 1800 ℃or 3180 F |
Performance parameters:
| Test item | alumina | |||
| index | unit | AL997 | AL99 | AL95 |
| Principal component content | N/A | 99.70% | 99% | 95% |
| Color | N/A | ivory white | ivory yellow | White |
| Gas permeability | N/A | airtight | airtight | airtight |
| density | g/cm3 | 3.9 | 3.8 | 3.7 |
| hardness | Moh's hardness | 9 | 9 | 8.8 |
| Water Absorption | N/A | ≤0.2 | ≤0.2 | ≤0.2 |
| Bending strength (20°C) | Mpa | 375 | 340 | 304 |
| Compressive Strength (20°C) | Mpa | 2300 | 2210 | 1910 |
| Coefficient of thermal expansion (25°C to 800° C) | 10X6/° C | 7.6 | 7.6 | 7.6 |
| Insulation strength (5mm thickness) | AC-kv/mm | 10 | 10 | 10 |
| Dielectric loss 25°C lMHz | N/A | 0.0001 | 0.0006 | 0.0004 |
| dielectric constant 25°C MHz | N/A | 9.8 | 9.5 | 9.2 |
| Volume resistivity (20°C) (300°C) (500 °C) | Ω.cm3 | >1014 | >1014 | >1014 |
| 2X1012 | 4X10" | 2X10" | ||
| N/A | N/A | N/A | ||
| Long-term service temperature | ℃ | 1700 | 1600 | 1400 |
| Thermal conductivity (25° C) | W/m/K | 35 | 34 | 20 |
Properties of Alumina Ceramic Block
- High Hardness: Possessing a Mohs hardness of 9, it is extremely resistant to abrasive wear, scratching, and erosion, significantly
outperforming most metals and alloys. - High Compressive Strength: It can withstand immense crushing loads without deformation, making it ideal for use as load-bearing
components in presses or fixtures. -
Superior Thermal Performance:
Excellent Thermal Stability: The block can operate in continuous service at temperatures up to 1650°C (3000°F) and can withstand - short-term peaks even higher.
- Good Thermal Shock Resistance: It maintains structural integrity under rapid temperature changes, though this is somewhat lower
- than in zirconia-based ceramics.
-
Outstanding Electrical Properties:
Excellent Electrical Insulation: It provides high dielectric strength and volume resistivity, even at elevated temperatures, making it
perfect for high-voltage and high-frequency applications. -
High Chemical Inertness:
It is highly resistant to attack by a wide range of acids, alkalis, and molten metals, ensuring long-term performance in corrosive environments.
Applications of Alumina Ceramic Block:
-
Wear-Resistant Components: As liners, wear blocks, and guides in mining, mineral processing, and bulk material handling equipment to
protect machinery from abrasion. -
Thermal Processing: As kiln furniture, furnace hearth plates, setters, and support structures in high-temperature sintering furnaces and
heat treatment operations. -
Electrical Insulation: As robust insulating structural members in high-voltage switchgear, bus bar supports, and plasma torch bodies.
-
Precision Fixturing: As thermally stable and wear-resistant blocks for jigs, fixtures, and reference bases in precision manufacturing
and measurement systems. -
General Industrial: As components in chemical processing equipment, seal housings, and ballistic armor arrays.
Manufacturers and Suppliers
-
AdValueTech: Offers alumina plates in various dimensions and thicknesses, with customization options available.
-
CERADIR: Provides 99.7% alumina plates with high reliability and thermal stability, suitable for industrial and
electronic applications. -
MICROPLAN ITALIA: Manufactures precision alumina surface plates with high flatness tolerances, available in custom
sizes and configurations. -
AGILEEN: Supplies high-quality alumina plates with a wide range of sizes and dimensions, suitable for various
industrial applications.
Customization and Quality Assurance
-
Customization: Many manufacturers offer alumina plates tailored to specific dimensions, shapes, and performance requirements
based on customer drawings or samples. -
Quality Control: Manufacturers adhere to strict quality control processes, including ISO certifications, to ensure the plates meet
high standards of durability and performance
Advantages of Alumina Ceramic Block
-
Cost-Effective: Despite their advanced properties, alumina plates are competitively priced compared to other high-performance
ceramics. -
Versatility: Suitable for a wide range of industries, including mining, medical, and electronics.
-
Long Service Life: Their wear resistance and toughness ensure a longer lifespan, reducing replacement costs
Company Information:




FAQ:
Why us?
* Professional manufacturer since 1997.
* Strict quality control on production process and tolerance.
* Free samples available
* Customized production based on your drawing or specification
* On-time delivery and reliable support and service
* Inventory available for quick shipment
* We keep confidentiality of all the drawings and business information between us.
Are you a trading company or a manufacturer?
* We are a manufaturer.
Can you provide the free samples?
* Yes,we can offer free sample if we have it in stock,but the courier fee is to be collected.
Do you accept customized production based our specification?
* Yes,we offer OEM and ODM service. Just send us your drawing if you have it. If you don’t have a drawing, just tell us your idea,
we will work out the drawing for you.
What's the delivery time?
* 7 working days for standard products 30 days for customized products.
What is the MOQ?
* No limit to the quantity. We can offer the best proposal and solutions according to your condition.
What is the payment terms you accept?
* T/T,LC,Western Union,moneygram are acceptable.
How to deal with the faulty?
* Firstly, Our product are produced in strict quality control system and the defective rate will be less than 2%.
If there are problems with the product, we will provide free replacement.