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New Covalent Ceramics: MgSiN2

  • Wilhelm A. Groen, Marcel J. Kraan (a1), Gijsbertus de With (a2) and Mathias P.A Viegers (a1)


The ternary nitride MgSiN2 crystallizes in a diamond-like structure with a band gap of 4.8 eV. These characteristics make the compound promising for a variety of applications. Recently we succeeded in preparing fully dense ceramics by sintering at 1550°C. Phase composition, chemical properties and the mechanical properties of the as-prepared ceramics are described. The ceramics are resistant to oxidation in air at least up to 920°C. The thermal conductivity at room temperature has been found to be 20 W/m·K. A considerable improvement of the thermal conductivity is expected when improved processing conditions, well within reach, are realized. A reasonable strength of 270 MPa and a fairly good fracture toughness of about 4.3 MPa·m½ are obtained. A hardness of about 15 GPa and a Young's modulus of 235 GPa have been measured. These new ceramics show that it is still possible to find improved materials as compared to the usual oxide and non-oxide ceramics.



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1. Slack, G.A., J. Phys. Chem. Solids 34, 321 (1973).
2. David, J., Laurent, Y. and Lang, J., Bull. Soc. Fr. Mineral. Cristallogr. 93, 153 (1970).
3. Harris, R.K., Leach, M.J. and Thompson, D.P., Chem. Mater. 4, 260 (1992).
4. Gaido, G.K., Dubrovskii, G.P. and Zykov, A.M., Izv. Akad. Nauk. SSSR, Neorg. Mater. 10, 564 (1974).
5. Sanderson, R.T., J. Chem. Educ. 44, 516 (1967).
6. With, G. de and Groen, W.A., in preperation.
7. Groen, W.A., Kraan, M.J. and With, G. de, J. Eur. Ceram. Soc. 12, 413 (1993).
8. Hintzen, H., Groen, W.A., Swaanen, P., Kraan, M.J. and Metselaar, R., submitted to J. Mater. Sci. Lett. 1993.
9. Söllter, W. and Güther, H.-M., Produktion und Priiftechnik 11, 106 (1991).
10. Harris, J.H., Youngman, R.A. and Teller, R.G., J. Mater. Res. 5, 1763 (1990).
11. Kostler, C., Gtither, H.-M., Bestgen, H., Roosen, A. and Böcker, W., Proc. 2nd Eur. Conf. Adv. Mater. Processes, Inst. of Mater., London, U.K., Vol. 3, 29 (1991).


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