Material Characteristics:
Silicon nitride bonded silicon carbide ceramic is a new type of composite structural ceramic produced by using high-purity silicon carbide as the aggregate and silicon nitride as the bonding phase, formed and then reaction-sintered in a nitrogen-protected high-temperature furnace. With SiC content ≤75% and Si₃N₄ content ≥25%, it combines the high-temperature strength and high thermal conductivity of silicon carbide with the high toughness, thermal shock resistance, and wear resistance of silicon nitride. The material features a dense structure, low apparent porosity, and a low thermal expansion coefficient. It resists oxidation, softening, and deformation, and possesses strong high-temperature load-bearing capacity. It is a new type of high-performance kiln furniture material designed for high-temperature firing and load-bearing applications.
Product Information:
Silicon nitride bonded silicon carbide plates are high-performance load-bearing plates made from highly homogeneous slab-shaped green bodies formed by extrusion or cold isostatic pressing, followed by densification through high-temperature nitridation reaction sintering. Giving full play to the combined advantages of high strength, excellent thermal shock resistance, dense structure, and thermal conductivity of the composite material, these plates exhibit outstanding characteristics of no bending, no oxidation, no slag shedding, and excellent long-term flatness in high-temperature firing cycles.
Performance Parameters:
Bulk density: 2.7–2.85 g/cm³, apparent porosity ≤1%, flexural strength at room temperature ≥180 MPa, Vickers hardness ≥2500 HV, fracture toughness ≥4.0 MPa·m^1/2, coefficient of thermal expansion: 4.8×10⁻⁶ /K, maximum operating temperature: 1450 °C.
Product Dimensions:
Conventional plates cover thicknesses from 5 mm to 20 mm, and length and width dimensions from 200 mm × 200 mm to 600 mm × 600 mm, with plates up to a maximum single-side length of 800 mm producible. The standard product configuration is a flat plate structure, which can be designed as rib-reinforced plates, perforated breathable plates, or multi-layer composite structures upon request. Further processing such as surface grinding, edge chamfering, precision drilling, slotting, and step machining can be carried out. Yuko Corporation can also customize non-standard dimensions, special-shaped plates, and assembled plate components according to customer drawings and requirements.
Product Applications:
Silicon nitride bonded silicon carbide plates are widely used as firing support boards and carrier plates in electronic ceramic sintering furnaces, high-temperature sintering plates for structural ceramics, load-bearing plates for magnetic material heat treatment, kiln furniture plates in sintering kilns for lithium battery cathode and anode materials, plates in firing kilns for domestic ceramics and sanitary ware, and sintering carrier plates for powder metallurgy products. They are a new type of composite ceramic plate that replaces traditional oxide-bonded silicon carbide plates, achieving higher firing efficiency, longer kiln furniture life, and a cleaner firing environment.