Ceramic cores for precision casting

Ceramics & Materials



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NORITAKE's ceramic cores for precision casting offer excellent stability at high temperatures. Used for manufacturing high-precision moving blades and stationary ones for gas turbines and jet engines, these ceramic cores contribute greatly to engine efficiency. They also allow assembling by jointing in manufacturing complex-shaped objects like cores for pump impellers.




NEW PRODUCT  Medium-pressure Injection Molded Ceramic Cores



  • Variety of Size and Shape
    We have various molding methods and materials, and we can support any sizes and shapes of the products.
  • Accuracy and Appearance
    Our products contribute to qualiy improvement of castings due to excellent dimensional accuracy and visual appearance.
  • Superior Leachability.
    Steady rate of pores allows superior leachability.

Ceramic core manufacturing processes

Ceramic core manufacturing processes

Core material characteristics

Material model N-200 ℃ MONARC NEW N600 N700
N400 N450 N500
Major composition SiO2-ZrSiO4 SiO2-ZrSiO4 SiO2-ZrSiO4-Al2O3 SiO2-Al2O3 SiO2-Al2O3 SiO2-ZrSiO4
Molding method Pouring method Method-pressure injection molding High-pressure injection molding

Shirinkage rate
(Sample:Total length 120mm)

0.2% 1.0% 1.0% 1.0% 0.9% 1.6%
Trace impurities(ppm)
Fe <300 <80 <80 <30 <200 <300
Pb <25 <25 <25 <25 <25 <25
Bi <1 <1 <1 <1 <1 <1
Ag <1 <1 <1 <1 <1 <1
Characteristic values
Porosity(%) 30 34 33 34 35 34
Thermal expansion rate(%) at 1,000℃ 0.25 0.25 0.25 0.25 0.10 0.25
Bending strength(Mpa)
at  RT 7 6 9 10 7 8
at 1,000℃ 24 20 25 24 20 22
Maximum length ~L1000 ~L500 ~L300 ~L250
Minimum length 0.80 0.50 0.50 0.30

Selection is made from among the above materials on the basis of the molten metal temperature, casting materials, and shape (size) of the cast product at customer’s request.


Ceramic cores for precision casting Product List

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