Sinoma Advanced Nitride Ceramics: silicon nitride balls, bearings, substrates and tubes

Silicon nitride balls and rollers from 0.8 to 110 mm, hybrid bearings, IGBT substrates, riser tubes, thermocouple tubes and insulating rings. Selection and a quotation for your project.

Silicon nitride balls and rollers: replacement

Silicon nitride balls are made by hot isostatic pressing (HIP) in diameters from 0.8 to 110 mm. Balls of about 1 mm go into dental drill bearings and about 50.8 mm into insulated wind turbine bearings. Silicon nitride rollers are also produced.

Ball size 0.8–110 mm
HIP processing
Wind turbines: about 50.8 mm
Dental drills: about 1 mm

Ceramic and hybrid bearings: replacement

Bearings with silicon nitride rolling elements serve electric vehicles, electroplating and cleaning machinery, medical equipment, cryogenics, optics, high-speed machine tools and motors. They are non-magnetic, insulating and self-lubricating, and weigh 41% of a steel bearing.

Weight 41% of steel
Non-magnetic and insulating
High-speed spindles and motors
Cryogenic engineering

Power module substrates: selection and replacement

Each silicon nitride substrate is sintered at 2000 °C and has a thermal conductivity above 80 W/(m·K). The substrates insulate and carry heat away from IGBT and MOSFET devices in modules for EVs, hybrids, high-speed rail, motor drives and chargers. Size is made to order.

Sintered at 2000 °C
Thermal conductivity > 80 W/(m·K)
IGBT and MOSFET modules
Custom size

Riser tubes and heater tubes: replacement

For low-pressure aluminium foundries the company makes silicon nitride riser tubes and heater protection tubes. The material is not infiltrated by molten aluminium or copper, resists thermal shock and has low thermal expansion. This simplifies tube preheating before operation.

Low-pressure aluminium foundries
No Al or Cu infiltration
Thermal shock resistance
Low thermal expansion

Silicon nitride thermocouple tubes: replacement

Silicon nitride thermocouple protection tubes serve aluminium foundries, polysilicon reduction furnaces and paper making. The material is dense and strong, insulates well, resists corrosion and thermal shock, and is not infiltrated by molten aluminium or copper.

Molten aluminium and copper
Polysilicon reduction furnaces
Corrosion resistance
High density and strength

Insulators, nozzles and plungers: wear and replacement

Silicon nitride electrode insulating rings for polysilicon reduction furnaces replace alumina, and insulating sleeves replace PTFE, with about ten times longer service life. The range also covers wear-resistant nozzles, high-pressure plungers and seal rings.

Ring life about 10 times longer
Replaces alumina and PTFE
High-pressure plungers
Seal rings

How to choose a Sinoma Advanced Nitride Ceramics part

Selection starts with the unit and its duty.

For bearings Sinoma Advanced Nitride Ceramics offers silicon nitride balls and rollers and complete ceramic and hybrid bearings; for power electronics, substrates; for aluminium foundries, riser tubes, heater tubes and thermocouple tubes; for polysilicon furnaces, insulating rings and sleeves.

Next come the dimensions. Balls are made from 0.8 to 110 mm in diameter, while substrates and structural parts are made to the customer drawing.

Balls, rollers and bearings

The balls are made by hot isostatic pressing (HIP). Balls of about 1 mm go into dental drill bearings, about 10 mm into insulated bearings of EV motors and machine tool spindles, and about 50.8 mm into wind turbine bearings.

Bearings with silicon nitride rolling elements are non-magnetic, insulating and self-lubricating and weigh 41% of steel bearings. They serve electroplating and cleaning machinery, medical equipment, cryogenics, optics and printing machinery.

Substrates for power electronics

Silicon nitride substrates are sintered at 2000 °C and have a thermal conductivity above 80 W/(m·K). They insulate and dissipate heat from IGBT and MOSFET devices.

The substrates go into modules for electric and hybrid vehicles, including PCU units, as well as high-speed rail equipment, motor drives and charging stations. Substrate size is made to order.

Aluminium foundries and polysilicon furnaces

For low-pressure aluminium foundries the company makes riser tubes, heater protection tubes and thermocouple tubes. Silicon nitride is not infiltrated by molten aluminium or copper, resists thermal shock and has low thermal expansion, which simplifies tube preheating.

Electrode insulating rings for polysilicon reduction furnaces replace alumina and insulating sleeves replace PTFE, with about ten times longer life. The range also covers nozzles, high-pressure plungers, seal rings and pulp vacuum dewatering plates.

The manufacturer

Sinoma Advanced Nitride Ceramics Co., Ltd belongs to China National Building Material Group (CNBM), with its plant in Zibo, Shandong province. Silicon nitride research dates back to 1978, the company was registered in 2011 and holds 78 filed and granted patents.

HIP balls reached the market in 2015, and batch production of G3 balls started in 2019. Dimensions, precision grade and lead time are stated in the quotation for each project.

Sinoma Advanced Nitride Ceramics and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Sinoma Advanced Nitride Ceramics and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.