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Addressing High Power Density and Thermal Failure Challenges — Silicon Nitride Ceramic Substrates Enable Stable Packaging for Next-Generation Semiconductors

As third-generation semiconductors such as SiC, GaN, and IGBT modules continue to evolve toward higher power density and switching frequency, customers face increasing challenges in thermal failure and device reliability. Under high-temperature and high-current operation, conventional alumina or aluminum nitride substrates often suffer from low thermal conductivity and poor mechanical strength, leading to overheating, solder fatigue, or delamination. The high thermal conductivity silicon nitride (Si₃N₄) ceramic substrate provides a breakthrough solution. Manufactured from high-purity Si₃N₄ powder through precision forming and sintering above 2000°C, it delivers a thermal conductivity >80 W/(m·K), along with excellent insulation, low dielectric loss, and superior flexural strength. Unlike conventional materials, silicon nitride’s thermal expansion coefficient closely matches silicon chips, reducing thermal stress and preventing delamination. Its high fracture toughness and thermal-shock resistance ensure reliability under rapid heating cycles and frequent start-stop operations, significantly extending the module’s service life. Silicon nitride ceramic substrates are now widely applied in EV motor drive modules, railway traction converters, high-speed train control systems, and fast-charging power units. Customer feedback shows up to 15% lower junction temperature and triple improvement in thermal cycling lifetime compared with traditional substrates. With their high thermal conductivity, mechanical reliability, and electrical insulation, silicon nitride ceramic substrates have become the preferred material for next-generation power electronics packaging and thermal management, supporting safer, longer-lasting, and more efficient semiconductor systems.

2025

08/11

Dual Protection Against Thermal Shock and Corrosion — Silicon Nitride Ceramic Components Ensure Stable Production in Aluminum Casting

In low-pressure die-casting and aluminum foundry operations, many customers struggle with cracking and corrosion caused by molten aluminum and thermal shock. Frequent replacement of metal riser tubes or heater protection tubes not only raises maintenance costs but also disrupts production stability. The silicon nitride (Si₃N₄) ceramic riser tube and heater protection tube provide a long-term solution to these problems. Produced from high-purity Si₃N₄ powder and sintered above 2000 °C, these ceramic components feature high density, exceptional mechanical strength, and outstanding thermal-shock resistance. Even under rapid heating and cooling, they maintain full structural integrity and resist aluminum infiltration. Their low thermal-expansion coefficient and excellent thermal conductivity ensure uniform temperature distribution, minimize metal oxidation, and improve energy efficiency. In continuous operation, silicon nitride riser tubes can work for thousands of hours without replacement, while heater protection tubes effectively extend the life of heating elements. Field data show that customers using Si₃N₄ components experience up to 30 % higher production stability and cleaner molten aluminum quality. With their high-temperature strength, corrosion resistance, and long service life, silicon nitride ceramic structural parts are becoming key materials for modern aluminum casting operations.

2025

06/16

Solving High-Speed and Electrical Corrosion Challenges — HIP Silicon Nitride Ceramic Balls Greatly Enhance Bearing Reliability

In EV motors, machine tool spindles, and wind turbine systems, customers face recurring issues with bearing wear and electrical corrosion under high-speed, high-temperature conditions. Traditional steel balls tend to overheat, oxidize, and fail when exposed to stray currents — shortening system lifespan and increasing maintenance costs. To address these challenges, the High-Performance Hot Isostatic Pressed (HIP) Silicon Nitride Ceramic Ball provides a proven solution. Made from ultra-pure Si₃N₄ powder and sintered above 2000°C, the HIP process ensures full density and a pore-free structure, resulting in exceptional toughness and thermal stability. The ceramic ball combines high electrical insulationwith high mechanical strength, preventing electrical pitting and ensuring stable operation even at temperatures up to 1000°C. Weighing only 40% of a steel ball, it reduces rotational inertia and heat generation. Its self-lubricating surface minimizes friction and allows for maintenance-free operation, ideal for long-term reliability in EV motors and precision spindles. Applications include: Dental drill bearings (≈1mm) — ensuring ultra-high-speed stability EV motor bearings (≈10mm) — eliminating electrical erosion Wind turbine generator bearings (≈50mm) — improving durability and safety With advantages of lightweight design, wear resistance, insulation, and long lifespan, HIP silicon nitride ceramic balls are redefining the reliability standard for modern bearing engineering.

2025

05/20

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