Growth and structural properties of Mg2Si and Ca2Si bulk crystals

Effect of Na Addition on Electric Properties of Ca2Si Sintered Compacts

“…The sources were weighed in the molar ratio of Ca: Mg 2 Si: Na=80: 20: 1, then placed in a loosely sealed container in a vacuum chamber. The detailed VPG process is described elsewhere [4][5][6][7]. Excess residual substances associated with starting materials were evaporated into the vacuum.…”

“…The electronic structures of Ca 2 Si have been calculated and a direct transition was expected [1][2][3]. The Ca 2 Si layers/powders have been successfully grown by the heat treatment of Si/Mg 2 Si substrates/powders under Ca vapors, and compacts were synthesized by a spark plasma sintering (SPS) technique [4][5][6][7][8][9][10]. In addition, it was found that the Ca 2 Si showed a semiconducting behavior [7][8][9][10], however, the conductivity of the Ca 2 Si was still low and influenced the thermoelectric properties [10].…”

Growth of Ca-Germanide and Ca-Silicide Crystals by Mechanical Alloying

“…The development of reactive deposition techniques has allowed us to grow new novel silicides, such as Ca 2 Si and Sr 2 Si [5][6][7][8]12]. In addition, a vacuum-free growth technique for the β-FeSi 2 layers or bulk preparations has been developed on the basis of the reactive deposition techniques [13].…”

“…The electronic properties of the AEM silicides have been comprehensively investigated [3,4]. Concerning the Ca-based silicides, the Ca 2 Si layers and bulk crystals were successfully grown using Mg 2 Si/Si and Mg 2 Si substrates, respectively [5][6][7]. Moreover, the Ca 5 Si 3 powders were obtained by the heat treatment of Si powders under Ca vapor [8].…”

Numerical and Experimental Investigations on the Growth of the Intermetallic Mg2Si Phase in Mg Infiltrated Si‐Foams

“…Note, that the solubility range is consistent with experimental observations. [27] In Figure 6c, we sketch the growth mechanism of the intermetallic layer. As judged by the slopes of the dashed lines in Figure 6b, the equilibrium chemical potential between the diamond and Mg 2 Si phases (the black dashed line) is negative, whereas the corresponding value between the hcp and Mg 2 Si phases (the green dashed line) is positive.…”