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Ceramic Stalk, Si3n4 Stalk, Riser Tube manufacturer / supplier in China, offering Ceramic Stalk for Aluminum Low Pressure Casting, Glass Fiber Reinforced 850kg/M3 High Density Fireproof Industrial Insulation Board Calciun Silicate Insulation, Fiber Reinforced Calcium Silicate Pipe -Non Asbestos and Waterproof and so on.

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Ceramic Stalk for Aluminum Low Pressure Casting

Min. Order / Reference FOB Price
1 Piece US $10,000/ Piece
Port: Qingdao, China
Production Capacity: 20000 PCS
Payment Terms: L/C, T/T
Refractoriness (℃): 1400
Feature: Long Time Materials
Type: Refractory Material
Shape: Tube
Material: Si3n4
Transport Package: Wooden Box

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Basic Info.

Model NO.
length: 1300mm max, dia: 40-180mm
HS Code

Our low pressure silicon nitride riser stalks provide performance cost advantages for low pressure die casting machines.

Because of unique properties to withstand thermal shock, erosion, and corrosive attack, coupled with its impervious and non wetting advantages, silicon nitride riser stalks  are long lasting and mainly maintenance free.

Silicon Nitride riser stalks are available with plain ends, grooved ends for assembly with metal flanges, or with integral collars for the optimum in strength and reliability.

Ceramic Stalk for Aluminum Low Pressure CastingCeramic Stalk for Aluminum Low Pressure CastingCeramic Stalk for Aluminum Low Pressure Casting

This new isostatically pressed class of advanced ceramics shows a major improvement with regards to the impact fracture toughness of Si3N4 .

Our riser stalks or riser tubes  have excellent non-wetting properties and a smooth surface are also important new features. Sialon ceramics can now be manufactured in nearly all shapes. 

Silicon Nitride riser tube or riser stalks are an alloy of silicon nitride and aluminum oxide. The combined properties of silicon nitride (high strength, hardness, fracture toughness, and low thermal expansion) and aluminum oxide (corrosion resistance, chemically inert, high temperature capabilities, and oxidation resistance). 

Low Pressure Die Casting

A low-pressure die casting (LPDC) holding furnace is designed to maintain pressures required for the casting process. The furnace contains a reservoir of molten metal, which is connected to the casting die by a stalk/riser tube (filling system). Critical issues for low-pressure die casters include melt cleanliness, hydrogen content, furnace pressure, casting temperature, casting cycle timing and mould coating and maintenance.



  • Considerably stronger than Syalon or Silicon Nitride.
  • Excellent non-wetting properties.
  • 12 months warranty against chemical attack.
  • Standard tolerance of +/- 0,5 mm
(1) High strength : High bending strength of 780MPa without deterioration up to 800deg. C.
(2) High density : High dense material with porous ratio of less than 0.3%
(3) High toughness : The highest fracture toughness(KIC) of 7.2MPa x m1/2 among ceramic materials
(4) High performance : Almost no erosion in molten aluminum and low wettability


 Typical applications:

  • Low pressure die casting machines. 
Remarks : 
  1. North refractories provides various shape of flange
    Standard shape is Metal Flange Type and One Body stalk tube Type. Special type of heater being equipped at flange position is possible.
  2. Surface coating
    In the conditions aluminum and oxidized aluminum are harmful, surface coating is recommended. 
    As standard coating material, series of SiO-ZrO being adjusted to the same thermal expansion as mother ceramics is used in order to protect stripping. 
  3. Maintenance
    Adhered aluminum on tube surface after long period usage is removed by acid cleaning at Kubota with charge upon request.

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