High-purity alumina ceramic is available in 96%, 99%, 99.5% and 99.8% Al₂O₃ options. The appropriate Al₂O₃ grade is selected according to the working temperature, plate size, load, flatness, and contamination-control requirements.
Excellent wear resistance, high hardness, high-temperature stability, chemical corrosion resistance, electrical insulation, low contamination risk, and good dimensional stability during repeated firing cycles. Custom sizes, thicknesses, holes, slots, grooves, chamfers, flatness control, grinding and polishing are available according to drawings or samples.
Widely used in sintering , powder metallurgy, electronic ceramic production, battery material firing, laboratory furnaces, industrial furnace fixtures, kiln furniture, and high-temperature support applications where thermal stability, wear resistance and low contamination are required.
Lead time depends on material grade, plate size, tolerance requirements, machining complexity, surface finish, and order quantity. For custom alumina ceramic sintering plates or setter plates, the delivery time will be confirmed after drawing review and technical evaluation.
CERAMPRO alumina ceramic sintering plates are designed for stable part support during high-temperature firing and sintering processes. Made from 96%, 99%, 99.5%, or 99.8% Al₂O₃ ceramic materials, these plates are commonly used as setter plates, support plates, and furnace fixture plates. They help maintain part positioning, reduce surface contamination, and improve support stability during repeated thermal cycles in ceramic, powder metallurgy, battery material, and electronic ceramic production.
This product is mainly manufactured from high-purity alumina ceramic, with different material grades selected according to working temperature, load, plate size, flatness requirements, and contamination sensitivity.
96% alumina is suitable for general furnace support and ceramic firing applications where cost and performance need to be balanced.
99% alumina is recommended for higher-temperature use, better density, lower porosity, and improved dimensional stability.
99.5% and 99.8% alumina can be considered for applications requiring lower contamination risk, cleaner contact surfaces, and more stable performance under repeated firing conditions.
For special working conditions involving higher impact or localized wear, ZTA reinforcement can also be evaluated after reviewing the drawing and application environment.
As an experienced alumina ceramic manufacturer, CERAMPRO can recommend a suitable material grade based on your actual furnace conditions and product requirements.
Alumina ceramic sintering plates are mainly used in production processes where parts need to be supported, separated, or positioned during high-temperature treatment. Compared with ordinary metal support plates, alumina ceramic offers better high-temperature resistance, chemical stability, and lower contamination risk.
Typical applications include:
Ceramic part firing and sintering support
Powder metallurgy part support during heat treatment
Battery powder and functional material firing
Electronic ceramic component production
Laboratory furnace support plates
Industrial kiln furniture and setter plate systems
Precision part support during repeated sintering cycles
Custom furnace fixtures for small-batch or OEM production
Alumina ceramic maintains good rigidity at high temperatures, helping reduce plate deformation and workpiece movement during firing or sintering.
The dense ceramic surface limits material absorption and residue buildup when supporting powders, green bodies, and precision ceramic parts.
The hard alumina surface withstands repeated loading, unloading, heating, and cooling in industrial kilns and furnaces.
Grinding and flatness control are available according to the required contact surface, supported load, and dimensional tolerances.
Plate size, thickness, holes, grooves, slots, chamfers, and special shapes can be produced according to furnace layout and part placement requirements.
Prototype and small-batch production are available for drawing-based kiln furniture projects before moving to regular production.
Dimensions, flatness, surface condition, and appearance are inspected before shipment to reduce installation and operating issues.
Technical Specifications
The following values are typical reference data for 99% and 96% alumina ceramic sintering plates. Final specifications may vary depending on material grade, plate size, thickness, structure, machining process, and customer drawing requirements.
| Parameter | 99% Alumina Al₂O₃ | 96% Alumina Al₂O₃ | Remarks |
|---|---|---|---|
| Bulk Density | ≥ 3.85 g/cm³ | ≥ 3.70 g/cm³ | High density helps reduce sagging during high-temperature use. |
| Max Working Temperature | 1750°C - 1800°C | 1600°C - 1650°C | Suitable for continuous use in air. |
| Flexural Strength | 350 - 400 MPa | 300 - 350 MPa | Provides good mechanical load capacity. |
| Thermal Conductivity | 30 - 35 W/(m·K) | 25 - 30 W/(m·K) | Helps improve heat distribution during firing. |
| Porosity | ≤ 0.5% | ≤ 1.0% | Dense, low-absorption surface. |
| Thermal Expansion | 8.2 × 10⁻⁶ /K | 8.0 × 10⁻⁶ /K | Measured at 1000°C. |
| Surface Flatness | ≤ 0.1 mm/100 mm | ≤ 0.2 mm/100 mm | Important for precision sintering support. |
| Acid / Alkali Resistance | Excellent | Excellent | Suitable for many corrosive atmospheres. |
| Item | 99% Alumina Ceramic | 96% Alumina Ceramic |
|---|---|---|
| Temperature Capability | Better suited to higher-temperature and repeated firing applications. | Suitable for general high-temperature furnace support. |
| Plate Stability | Higher density and lower porosity support better dimensional stability. | Reliable for common setter plates and furnace support plates. |
| Contamination Control | Recommended when lower absorption and cleaner contact surfaces are required. | Suitable for applications with standard contamination-control requirements. |
| Cost Consideration | Higher material cost but better suited to demanding sintering conditions. | A more economical option for standard or larger-size plates. |
| Recommended Applications | Electronic ceramics, battery materials, precision ceramic sintering, and cleaner firing processes. | General ceramic firing, powder metallurgy, kiln furniture, and industrial furnace support. |
99.5% alumina ceramic is suitable for precision electronic ceramics, semiconductor-related components, advanced ceramic parts, and firing processes that require lower contamination and better chemical stability.
99.8% alumina ceramic is recommended for high-purity processing, sensitive electronic materials, laboratory components, and demanding furnace applications where minimal impurities and cleaner contact surfaces are important.
The final alumina grade should be selected according to the firing temperature, furnace atmosphere, supported load, plate dimensions, flatness, contamination-control requirements, and project budget.
They support, separate, and position components during high-temperature firing. Typical applications include technical ceramic production, powder metallurgy, battery material processing, and electronic component sintering.
Available options include 96%, 99%, 99.5%, and 99.8% alumina. The suitable grade depends on the firing temperature, supported load, contamination requirements, flatness, and project budget.
Alumina ceramic offers better high-temperature stability, wear resistance, chemical resistance, and lower contamination risk than many metal plates used in kiln and furnace environments.
Yes. Plate dimensions, thickness, holes, slots, grooves, chamfers, surface finish, and flatness can be produced according to drawings or samples. Large and thin plates require a technical review before production.
Please provide the drawing, material grade, dimensions, tolerances, quantity, operating temperature, furnace atmosphere, supported load, and surface or flatness requirements.
Yes. We serve OEM customers in the USA, Germany, Japan, and other European markets, supporting drawing review, prototype production, inspection, export packaging, and international delivery.
Lead time depends on the alumina grade, plate dimensions, thickness, tolerances, machining complexity, surface finish, and order quantity. The final schedule is confirmed after drawing review and technical evaluation.
