In various fields of modern industry, the performance requirements of materials are becoming increasingly stringent. Especially in occasions where high strength, high wear resistance and excellent chemical stability are required, such as aerospace, advanced equipment manufacturing and precision electronic products, the requirements for material performance have reached an unprecedented height. In these fields, high-yield strength silicon nitride (Si3N4) ceramic panels have become an ideal material choice due to their excellent physical and chemical properties.
The exceptional ability of high-yield-strength silicon nitride ceramic panels to endure extreme application conditions is a result of their distinctive material properties and meticulous preparation process. Silicon nitride, with its high hardness, strength, low thermal expansion coefficient, and exceptional thermal shock resistance, is a material that piques curiosity and is particularly suitable for use as a structural panel material with extremely high requirements.
high-yield-strength silicon nitride ceramic panels
The static pressing process is the key to preparing high-yield strength silicon nitride ceramic panels, involving the following important steps:
The selection and ratio of raw materials are the basis. High-purity Si3N4 powder is selected as the base material, and then an appropriate amount of sintering aids, such as magnesium oxide (MgO) and aluminum oxide (Al2O3), are added to reduce the sintering temperature and increase the density of the product.
The mixing process must ensure uniformity. Through mechanical alloying treatments such as ball milling, the powder particle size is further refined and uniformly distributed, which lays a solid foundation for subsequent molding and sintering.
Static pressing is the core of the forming process. In this step, cold isostatic pressing technology is used, which can obtain uniform and dense green bodies at lower pressures, laying the foundation for the high performance of the final product.
Sintering is the key to achieving high-yield strength. At high temperatures exceeding 1700°C, solid-phase sintering occurs between Si3N4 particles to form hard and continuous grain boundaries, thereby achieving high density and excellent mechanical properties.
Processing and precision adjustment. The sintered ceramic panel needs to be precisely machined to achieve precise dimensions and surface finish requirements. Due to the high hardness of silicon nitride, this step has extremely high requirements for tools and processes.
TRUNNANO Silicon Nitride Si3N4 Powder CAS 12033-89-5
Quality inspection is a vital part of the process, ensuring the reliability and performance of the product. Techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM) observation, and mechanical properties testing are employed to evaluate the phase structure, micromorphology, and physical properties of the material, instilling confidence in its quality.
Silicon nitride ceramic panels with high yield strength have demonstrated excellent performance in high-end applications. In the aerospace field, it is used to manufacture high-temperature resistant parts for aircraft and spacecraft; in high-performance electronic equipment, it is used as a heat sink; in precision machinery manufacturing, it is used for high-precision workbenches and brackets.
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