Oxide-bonded silicon carbide plates are high-performance ceramic plates made by sintering at high temperatures with silicon carbide (SiC) as the main aggregate (content usually ≥ 80%) and an oxide binder.
The production process typically involves raw material mixing, forming (such as isostatic pressing or molding), and high-temperature sintering (1300-1600℃). Some products require the addition of anti-oxidation agents or expansion agents to optimize performance.
Silicon carbide plates (SiC plates) are high-performance refractory kiln furniture components designed for extreme-temperature industrial environments. They are widely used in ceramic kilns, glass firing systems, heat treatment furnaces, and metallurgical processes where flatness stability, load-bearing strength, and thermal shock resistance are critical.
Compared with traditional ceramic or alumina plates, silicon carbide plates provide significantly higher mechanical strength and better resistance to deformation under long-term thermal stress. This makes them one of the most reliable materials for modern high-temperature kiln systems.
Highland Refractory manufactures industrial-grade silicon carbide plates with controlled density, excellent flatness, and long service life, helping customers improve kiln efficiency and reduce operating costs.
A silicon carbide plate is a flat refractory ceramic component made primarily from high-purity silicon carbide (SiC), formed through high-temperature sintering or reaction bonding processes.
In kiln systems, SiC plates function as load-bearing support surfaces for products during firing or heat treatment. They are installed inside kilns or furnace cars to carry ceramic products, glass materials, or industrial components.
Unlike traditional kiln shelves, silicon carbide plates maintain their shape and flatness even under:
This stability makes them essential in precision firing processes where dimensional accuracy is required.
The main reason silicon carbide plates are widely used in industrial furnaces is their ability to maintain structural stability under extreme conditions.
1. Excellent Flatness Retention
Flatness is critical in kiln systems. Any deformation of the support surface directly affects product quality. Silicon carbide plates maintain high flatness because of high rigidity, low thermal expansion, and a strong internal bonding structure. This ensures consistent firing results across multiple production cycles.
2. High Load-Bearing Capacity
SiC plates can support heavy loads without bending or cracking. They are suitable for dense ceramic products, large industrial components, and multi-layer stacking systems. This reduces the need for frequent replacement and improves kiln efficiency.
3. Superior Thermal Shock Resistance
Industrial kilns often experience rapid temperature changes. Silicon carbide plates resist thermal shock extremely well due to high thermal conductivity, a low expansion coefficient, and uniform heat distribution. This significantly reduces cracking and failure rates.
4. Long Service Life
Compared to alumina or clay-based plates, silicon carbide plates offer a much longer service life under the same operating conditions. This results in lower maintenance frequency, reduced downtime, and better long-term cost efficiency.
Silicon carbide plates are used in a wide range of high-temperature industrial processes.
Ceramic Industry
Used in tunnel kilns, roller hearth kilns, shuttle kilns, and sanitary ware production. SiC plates ensure stable support and consistent firing quality.
Glass Manufacturing
In glass fusing and slumping applications, flatness is extremely important. Silicon carbide plates provide a zero deformation support surface, uniform heat distribution, and reduced optical distortion in glass products.
Heat Treatment Furnaces
Used in metal hardening, annealing processes, and precision component treatment. SiC plates maintain stability under repeated heating cycles.
Metallurgical Industry
Applied in sintering processes, powder metallurgy, and high-temperature structural support systems.
Kiln Car Systems
Silicon carbide plates are commonly installed in kiln cars to carry heavy production loads during continuous firing.
Understanding material differences is essential for correct selection.
| Property | Silicon Carbide Plate | Alumina Plate | Cordierite Plate |
|---|---|---|---|
| Max Temperature | Very High (up to 1400–1600°C) | High | Medium |
| Flatness Stability | Excellent | Moderate | Poor–Moderate |
| Thermal Shock Resistance | Excellent | Good | Moderate |
| Load Capacity | Very High | Medium | Low |
| Service Life | Long | Medium | Short–Medium |
Key Conclusion:
Silicon carbide plates are the best choice for high-load, high-precision industrial kiln applications.
Typical technical parameters include:
Actual performance varies depending on grade and application conditions.
Selecting the correct SiC plate depends on several engineering factors.
1. Operating Temperature
Always select a material grade with a safety margin above your maximum kiln temperature.
2. Load Requirements
Heavier loads require higher density SiC material, increased plate thickness, and an optimized structural design.
3. Kiln Type
Different kiln systems require different plate characteristics: Tunnel kilns forward long-term stability; Roller kilns forward thermal shock resistance; Batch kilns forward flexibility and load balance.
4. Flatness Requirement
For precision applications (glass or technical ceramics), flatness tolerance is critical.
5. Production Cycle
Frequent heating cycles require better thermal fatigue resistance.
Highland Refractory provides OEM and custom-engineered silicon carbide plates based on customer requirements. Customization options include:
This ensures compatibility with different kiln systems and production processes.
All silicon carbide plates are produced under strict quality control systems:
Each batch is tested to ensure consistency and reliability in industrial applications.
Using silicon carbide plates provides several long-term advantages: Improved firing consistency, reduced product defects, lower replacement frequency, increased kiln efficiency, and reduced operational downtime. These benefits directly improve production profitability and stability.
Silicon carbide plates help eliminate common kiln issues such as warping of kiln shelves, uneven firing surfaces, product deformation during firing, frequent shelf replacement, and thermal cracking under fast cycles. By solving these issues, SiC plates improve overall process reliability.
Silicon carbide plates are essential kiln furniture components for modern high-temperature industrial systems. Their combination of high strength, thermal stability, and long service life makes them the preferred choice for demanding applications.
Whether used in ceramic production, glass processing, or industrial heat treatment, SiC plates provide consistent performance and reliable structural support. For manufacturers seeking improved efficiency and reduced operational costs, silicon carbide plates offer a long-term technical and economic advantage.
Highland Refractory provides engineered silicon carbide plate solutions tailored to your kiln system and production requirements. Custom sizing is available, engineering support is provided, and we offer a fast quotation response. 👉 Contact us for technical consultation and pricing support.
Silicon carbide plates can typically operate between 1350°C and 1600°C depending on the material grade, bonding method, and specific high-temperature industrial kiln configuration.
Under normal industrial operating conditions, SiC plates maintain excellent flatness and resist structural warping or sagging, even under heavy multi-layer load stacking and continuous thermal cycles.
Yes, custom sizes, thicknesses, structural configurations, and specialized high-load tolerances are fully available and manufactured based on your unique technical engineering drawings and kiln layout requirements.
They are widely used across heavy industrial sectors including technical ceramics production, glass slumping and fusing manufacturing, metallurgy, powder sintering, and specialized heat treatment systems.
Service life strictly depends on your exact temperature, load weight, and thermal cycle frequency. However, SiC plates generally last significantly longer than traditional alumina, clay, or cordierite alternatives, lowering your total cost of ownership.
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Silicon carbide plates are mainly composed of silicon carbide (SiC) as the aggregate (with a content usually ≥ 80%).
