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Journal of Materials Science

, Volume 29, Issue 12, pp 3161–3166 | Cite as

New ternary nitride ceramics: CaSiN2

  • W. A. Groen
  • M. J. Kraan
  • G. De With
Article

Abstract

The synthesis of CaSiN2 powder, starting from metal nitrides, is described. Fully dense CaSiN2 ceramics can be sintered from the prepared powder at 1700 °C. The samples were sintered in a closed Mo vessel to prevent evaporation of calcium nitride. The phase composition, and the chemical and mechanical properties of the as-prepared ceramics are described. The thermal conductivity at room temperature was evaluated as 2.4 Wm−1 K−1. A reasonable strength of 179 MPa and a fairly good fracture toughness of about 2.1 MPam1/2 were found. A hardness of 9.6 GPa and a Young's modulus of 174 GPa were measured. The value of the relative dielectric constant was measured as 13.3. The bandgap for CaSiN2 at room temperature was estimated from diffuse-reflectance spectra to be 4.5 eV. Considerable improvement in the properties are expected when the processing conditions which is well within reach are optimized.

Keywords

Evaporation Thermal Conductivity Dielectric Constant Nitride Fracture Toughness 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • W. A. Groen
    • 1
  • M. J. Kraan
    • 1
  • G. De With
    • 1
  1. 1.Philips Research LaboratoriesJA, EindhovenThe Netherlands

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