High‑purity silicon nitride powder, CAS 12033‑89‑5. Produced through high‑temperature direct nitridation, fine grinding, impurity removal and precise particle classification. This non‑oxide ceramic powder provides outstanding fracture toughness, moderate thermal conductivity and low thermal expansion. It can be adopted as sintering feedstock for CPO structural ceramic components as well as functional thermal filler inside resin systems to enhance mechanical durability and heat‑dissipation perfor

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Product Detail PageSilicon Nitride Powder High‑Purity CAS 12033‑89‑5, High‑Strength Toughness for CPO Structural Ceramic & Thermal FillerThis high‑purity silicon nitride powder is synthesized via direct nitridation of silicon powder under high‑temperature nitrogen atmosphere. Subsequent processing includes pulverization, de‑agglomeration, purification and multi‑stage air classification. Manufacturing parameters are tightly controlled to regulate the ratio of alpha‑phase and beta‑phase crystals. Metallic impurities and residual silica content are strictly limited, which is essential for guaranteeing sintering activity and final mechanical properties of sintered ceramic bodies.

When utilized as starting material for CPO structural ceramic fabrication, the silicon nitride powder is homogeneously mixed with appropriate sintering auxiliaries. The mixture goes through shaping and pressure‑assisted sintering to produce dense silicon nitride ceramic components. Sintered Si₃N₄ ceramic exhibits high flexural strength, excellent fracture toughness, low coefficient of thermal expansion and outstanding thermal‑shock resistance. These ceramic components function as supporting spacers, positioning brackets and rigid structural frames inside high‑density CPO optical modules. They withstand recurring thermal stress generated by high‑power optical chips, restrain structural displacement and deformation, and maintain precise optical alignment for optoelectronic assemblies over long‑term service cycles.

For thermal‑filling applications in polymer composites, silicon nitride powder is incorporated into epoxy or silicone resin matrices. It improves overall thermal conductivity of cured resin while reinforcing the polymer matrix, enhancing surface hardness, scratch resistance and anti‑fatigue performance of packaging materials. Compared with high‑hardness alumina filler, silicon nitride delivers relatively mild abrasion, effectively mitigating abrasive wear to extruder screws, mixing vessels and molding molds during compounding and processing.

Custom silane surface modification is available for this silicon nitride powder. Surface treatment optimizes powder dispersion within organic resin systems, restrains excessive viscosity increase during compounding, and strengthens interfacial adhesion between ceramic particles and polymer phase. It can be compounded with boron nitride, spherical alumina or aluminum nitride powder to formulate hybrid thermal‑conductive filler blends, allowing formulators to adjust thermal conductivity, rheology and mechanical performance for custom CPO encapsulation recipes.

Even though silicon nitride possesses good chemical stability, prolonged exposure to humid air will induce gradual surface oxidation. Hermetically sealed dry storage is required for the powder. During weighing, conveying and batching workflows, cross‑contamination with alumina and other oxide ceramic powders must be prevented. Unwanted oxide contaminants will impair sintering behavior and reduce fracture toughness of finished structural ceramic parts. This high‑purity silicon nitride powder serves as a premium non‑oxide ceramic raw material and thermal filler for high‑reliability CPO structural ceramic and advanced semiconductor packaging composites.

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Silicon Nitride Powder High-Purity CAS 12033-89-5, High-Strength Toughness for CPO Structural Ceramic & Thermal Filler

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Jishengya Technology

Shenzhen Jishengya Technology Co., Ltd. is located in Shenzhen, a special economic zone, and is a comprehensive technology enterprise integrating independent R&D, production and sales.