摘要It is possible for Beryllium oxide (BeO) to have a cubic diamond structure although it normally has a hexagonal structure under ambient conditions. As the solution of cubic BN and diamond, the solid solution of cubic BeO-diamond or BeO-cBN-diamond can potentially be a kind of super-hard materials with designable hardness; and this solution has also been confirmed based on our preliminary first principles calculations. In addition, the nonstoichiometry of BeO could create a mobile carrier in the cubic BeO-C or BeO-BN-C system and it might lead to a new type of semiconductor Be-diamond.
Abstract:It is possible for Beryllium oxide (BeO) to have a cubic diamond structure although it normally has a hexagonal structure under ambient conditions. As the solution of cubic BN and diamond, the solid solution of cubic BeO-diamond or BeO-cBN-diamond can potentially be a kind of super-hard materials with designable hardness; and this solution has also been confirmed based on our preliminary first principles calculations. In addition, the nonstoichiometry of BeO could create a mobile carrier in the cubic BeO-C or BeO-BN-C system and it might lead to a new type of semiconductor Be-diamond.
[1] Bundy F P et al 1955 Nature 176 51 Bundy F P et al 1961 J. Chem. Phys. 35 383 [2] Wentorf R H J 1961 J. Chem. Phys. 34 809 Wentorf R H J 1967 J. Appl. Phys. 18 865 Wentorf R H J et al 1980 Science 208 873 [3] Hazen R M and Finger L W 1986 J. Appl. Phys. 59 3728 [4] Jephcoat A P et al 1988 Phys. Rev. B 37 4727 [5] Luo C et al 2005 High Energy Phys. Nucl. Phys. 29S 106 [6] Gerlach W 1922 Z. Phys. 9 184 [7] Lichanot A and Rerat M 1993 Chem. Phys. Lett. 211 249 [8] Van Camp P E and Van Doren V E 1996 J. Phys. Condens.Matter 8 3385 [9] Boettger J C and Wills J M 1996 Phys. Rev. B 54 8965 [10] Park C J et al 1999 Phys. Rev. B 59 13501 [11] Wu B and Xu J 1998 Phys. Rev. B 57 13355 Wu B and Xu J 1999 Phys. Rev. B 60 2964 [12] Bundy F P et al 1996 Carbon 34 141 [13] Nakano S et al 1994 Chem. Mater. 6 2246 [14] Knittle E et al 1995 Phys. Rev. B 51 12149 [15] Komatsu T et al 1996 J. Mater. Chem. 6 1799 [16] Solozhenko V L et al 2001 Appl. Phys. Lett. 78 1385 [17] Zhao Y et al 2002 J. Mater. Res. 17 3139 [18] Xu J, Sun Z and Bi Y 2008 in preparation [19] Xu J et al 2002 J. Physics C: Condens. Matter 14 11549