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SHAPAL™ Hi M-soft

Machinable aluminum nitride ceramics

Special Properties

  • Excellent machinability
  • High strength
  • Suitable for vacuum environments
  • Good heat dissipation
  • Approx. five times higher thermal conductivity than aluminum oxide ceramic
  • Outstanding electrical insulation
  • Low coefficient of expansion
  • Remarkable high-frequency properties
  • Operating temperature up to 1000 °C
    (up to 1900 °C in a non-oxidizing atmosphere)

Typical Applications

  • Vacuum applications
  • Specialty ceramic heat sinks for electronics
  • High precision workpieces
  • Small series and prototypes
  • Components made of low expansion ceramics


SHAPAL™ Hi M-soft ceramic offers special properties of ceramics without their typical disadvantages

Ceramic materials have special properties that metals or other materials cannot offer. But as a rule, the processing of ceramics involves a great deal of effort because such materials usually are hard and brittle. The SHAPAL Hi M-soft aluminum nitride ceramic overcomes this disadvantage because it is machinable while still offering an excellent strength. SHAPAL Hi M-soft ceramic is containing special particles of crystals with lamellar shapes that prevent cracks on the surface when cutting deep into the material.

SHAPAL Hi M-soft material also has very interesting electrical specifications. It provides a very high insulation resistance and very good high-frequency properties like a low dielectric loss factor and a small dielectric constant. Hence, electrical insulators are often made of SHAPAL ceramic. In addition, SHAPAL offers a good heat dissipation, allowing the aluminum nitride ceramics even to be used for heat sink applications.


To request a quote for your individually shaped SHAPAL™ Hi M-soft ceramic workpieces, please click the button below:


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SHAPAL™ Hi M-soft is a registered trademark of Tokuyama, Japan.

Specifications & Properties

 

Density

  • 2,88 g/cm3 (4° C)

Coefficient of Thermal Expansion

  • 4,8 x 10-6 / °C (RT-400 °C)
  • 4,9 x 10-6 / °C (RT-600 °C)
  • 5,0 x 10-6 / °C (RT-800 °C)

Thermal Conductivity

  • 100 W/mK (-100 °C)
  • 92 W/mK (25 °C)
  • 55 W/mK (500 °C)
  • 35 W/mK (1000 °C)

Operating Temperature

  • up to 1000 °C (in air)
  • up to 1900 °C (in a non-oxidizing atmosphere)

Thermal shock resistance

  • up to 400 °C (when quenched with water)

Mechanical Characteristics

  • Porosity:
  • Young's Modulus (25 °C): 176 GPa
  • Poisson's Ratio: 0,31
  • Vickers Hardness (25 °C ; 300g): 380 kg/mm2
  • Bending strength:
    • 340 MPa (-100 °C)
    • 300 MPa (25 °C)
    • 325 MPa (500 °C)
    • 350 MPa (1000 °C)
  • Compressive Strength: 980 MPa

Electrical Characteristics

  • Dielectric Constant (25 °C ; 1 MHz): 6,8
  • Dissipation Loss (25 °C ; 1 MHz): 0,001
  • Dielectric Strength (25 °C): 65 KV / mm
  • Volume Resistivity:
    • 1,0 x 1015 Ω x cm (25 °C)
    • 3,2 x 1010 Ω x cm (500 °C)
    • 4,6 x 105 Ω x cm (1000 °C)

Chemical Durability of SHAPAL Hi M-soft ceramic
(Typical values, no guarantee)

Medium

Time

Temp.
(°C)

Weight loss
(mg/cm2)

10% HCL
24 h
20 °C
ca. 0,2
10% NaOH
2 h
20 °C
ca. 1,7

 


All given details and specifications given here are mean reference values and are not guaranteed. Also, please consider our "Notes on specifications".

 

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