New covalent ceramics: MgSiN2

W.A. Groen, M.J. Kraan, G. With, de, M.P.A. Viegers

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

10 Citations (Scopus)

Abstract

The ternary nitride MgSiN2 crystallizes in a diamond-like structure with a band gap of 4.8 eV. These characteristics make the compd. promising for a variety of applications. Recently we succeeded in prepg. fully dense ceramics by sintering at 1550 DegC. Phase compn., chem. properties and the mech. properties of the as-prepd. ceramics are described. The ceramics are resistant to oxidn. in air at least up to 920 DegC. The thermal cond. at room temp. has been found to be 20 W/m.K. A considerable improvement of the thermal cond. 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.m1/2 were 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. [on SciFinder (R)]
Original languageEnglish
Title of host publicationCovalent ceramics II : non-oxides ; symposium held November 29 - December 2, 1993, Boston, Massachusetts, U.S.A
EditorsA.R. Barron, G.S. Fischman
Pages239-244
Publication statusPublished - 1994
EventCovalent Ceramics II: Non-Oxides, November 29-December 2, 1993, Boston, MA, USA - Boston, MA, United States
Duration: 29 Nov 19932 Dec 1993

Publication series

NameMaterials Research Society Symposium Proceedings
Volume327
ISSN (Print)0272-9172

Conference

ConferenceCovalent Ceramics II: Non-Oxides, November 29-December 2, 1993, Boston, MA, USA
CountryUnited States
CityBoston, MA
Period29/11/932/12/93
OtherSymposium held at the 1993 MRS Fall Meeting

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