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Producing a Variety of Silicon Nitride Ceramics


JMC produces a variety of slip cast and pressureless sintered silicon nitride and silicon nitride composite ceramic parts at the Sakata Ceramics Center in Sakata, Japan. Slip cast shapes may be produced in many intricate configurations to meet the special requirements of our customers. Silicon nitride ceramics exhibit superior corrosion resistance for molten metals including aluminum, zinc, and brass.

Thermocouple Protection Tubes

Protection Tubes

Pressureless Sintered Silicon Nitride

Max Thermal Resistance: 1,200°C
Cont Thermal Resistance: 1,000°C
Density: 3.1 g/cm3
Flexural Strength: 690 MPa
Thermal Shock Resistance: 700°C
Apparent Porosity: <0.1%
Thermal Expansion: 3.5 x 10-6 (RT-1000°C)

Standard Dimensions

Protection Tube Dimensions

Bubbling Pipes


A silicon nitride tube can be combined with a porous plug to aid in removal of gases from molten metals.

Pipes Information

Molten Metal Degassing Equipment


Rotary Martian

Pressureless sintered silicon nitride rotary shaft with silicon nitride impregnated graphite or silicon nitride bonded silicon carbide porous plug.

Shaft: 1,200°C Max
Porous plug: 900°C Max
Shaft length: 600, 700, 800, 900, 1000mm