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  • Product Description

    JFM offers high-purity ceramic discs, including silicon carbide, aluminum nitride, and yttria, widely used in semiconductors and electronics. Our discs provide high flatness, precision, and durability, ensuring stable performance in extreme conditions. We supply both standard and custom OEM products based on customer specifications.

  • Product Properties

    High Melting Point
    High Thermal Conductivity
    Excellent Translucency
    Corrosion Resistance
    High Temperature Resistance

Technical support

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  Alumina Zirconia Yttria Aluminum Nitride Silicon Nitride Silicon Carbide
Item (JFM) Unit JC-AZ025A JC-A995A JC-A990A JC-A995A JC-A997A JC-A997B JC-A999A JC-Z08 JC-ZA20 JC-Y100A JC-AN100A JC-AN180 JC-SN-GPS-01 JC-SN-GPS-02 JC-SC101
Physical Property  
Content % - 95.0% 99.0% 99.5% 99.7% 99.7% 99.9% - - - - - - - -
Colour   Milky White White White Milky White Milky White Milky White White Milky White Milky White Greyish White Milky White Greyish White Greyish White Greyish White Black
Density g/cm3 4.4 3.7 3.8 3.9 3.92 3.94 3.95 6.0 5.6 4.9 3.2 3.3 3.21 3.23 3.15
Mechanical Behavior  
Vickers Hardness GPa 15 13.7 15.2 16.0 17.2 17.2 17.5 12.5 10.5 6 11.2 10.5 13.5 14.8 23
Bending Strength Mpa 650 350 310 360 380 380 400 1000 750 130 220 320 720 900 500
Compressive Strength Mpa - - 2160 2350 2380 2400 2560 2100 2300 3000 450 - 3200 3200 3900
Young's Modulus GPa 320 320 360 370 380 380 380 200 200 160 310 320 300 310 420
Poisson's Ratio / 0.25 0.23 0.23 0.23 0.23 0.23 0.23 0.31 0.31 - 0.24 0.24 0.28 - 0.17
Fracture Toughness Mpa.m1/2 5 3-4 3-4 4 4.8 5 5.4 4.6 7.4 1.1 3.2 3.3 6.5 7 3.2
Thermal Property  
Coefficient of Thermal Expansion 10-6/°C 9 7.2 7.2 7.2 7.2 7.2 7.2 10.5 10 7.2 4.6 4.6 2.8 2.8 4.3
Thermal Conductivity W/(m.K) 19 24 29 32 32 32 34 3 3 14 120 180 26 28 160
Specific Heat Capacity J/(g.K) - 0.78 0.79 0.78 0.79 0.79 0.78 0.46 0.46 0.45 0.72 0.72 0.64 0.64 0.67
Maximum Operating Temperature °C 1600 1500 1600 1600 1600 1600 1600 2200 1600 1800 800 800 1200 1200 1600
Electrical Property  
Dielectric Strength kv/mm - 15 15 15 15 15 15 11 13 11 16 14 13 13 -
Dielectric Constant （1MHz）  - - 9.4 9.9 9.9 9.9 9.9 9.9 33 28 11 8.5 8.6 9.6 9.6 -
Dielectric Losses （1MHz） （X10-4） - 4 2 1 1 1 1 16 17 5 2 3 3 3 -
Volume Resistivity 20℃ Ω.cm >1012 >1014 >1014 >1014 >1014 >1014 >1014 1013 >1014 >1013 >1014 >1014 >1014 >1014 108
Volume Resistivity 300℃ Ω.cm - 1010 1010 1013 1013 1013 1013 106 106 1010 1011 1010 1012 1012 -

* This data is an example of test results in lab. It may be different from the actual characteristics in a particular manufacturing process.

  • Density
  • Flexural Strength
  • Compressive Strength
  • Young's Modulus
  • Fracture Toughness
  • Thermal Expansion
  • Thermal Conductivity
  • Specific Heat
  • Max. Service Temp.
  • Dielectric (1MHz)

* This data is an example of test results in lab. It may be different from the actual characteristics in a particular manufacturing process.

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