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

Yoshifumi Warashina; Yoshifumi Ito; Tamotsu Nakamura; Hirokazu Tatsuoka; Jeff Snyder; Miyoko Tanaka; Takashi Suemasu; Yoshikazu Anma; Masaru Shimomura; Yoshihiro Hayakawa

doi:10.1380/ejssnt.2009.129

Conference -ISSS-5-

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

Yoshifumi Warashina, Yoshifumi Ito, Tamotsu Nakamura, Hirokazu Tatsuoka, Jeff Snyder, Miyoko Tanaka, Takashi Suemasu, Yoshikazu Anma, Masaru Shimomura, Yoshihiro Hayakawa

Author information

Yoshifumi Warashina
Faculty of Engineering, Shizuoka University, Japan
Yoshifumi Ito
Faculty of Engineering, Shizuoka University, Japan
Tamotsu Nakamura
Faculty of Engineering, Shizuoka University, Japan
Hirokazu Tatsuoka
Faculty of Engineering, Shizuoka University, Japan
Jeff Snyder
California Institute of Technology, USA
Miyoko Tanaka
National Institute for Materials Science, Japan
Takashi Suemasu
Institute of Applied Physics, University of Tsukuba, Japan
Yoshikazu Anma
Research Institute of Electronics, Shizuoka University, Japan
Masaru Shimomura
Research Institute of Electronics, Shizuoka University, Japan
Yoshihiro Hayakawa
Research Institute of Electronics, Shizuoka University, Japan

Keywords: Transmission high-energy electron diffraction, Nano-particles, quantum dots, and supra-molecules, Powders, Silicides, Alloys

JOURNAL FREE ACCESS

2009 Volume 7 Pages 129-133

DOI https://doi.org/10.1380/ejssnt.2009.129

Details

Abstract

Ca-germanide and Ca-silicide crystals were synthesized by mechanical alloying (MA). The resulting powders made from the Ca and Si powders contain Ca₂Si and/or Ca₅Si₃ phases with additional cubic phase crystals. The grown phases, namely Ca₂Si and Ca₅Si₃, can be controlled by the Ca/Si ratio and the Si powder size. For the powders synthesized using the Ca and Ge powders, the cubic crystalline phase was synthesized. It was found that the powders synthesized from the Ca and Ge powders are covered by an amorphous layer that contains oxidized carbons. The Ca-based bulk tablets pressed from the powders show a p-type semiconducting behavior, though the powder surface is heavily oxidized, which might affect the transport property of the bulk. [DOI: 10.1380/ejssnt.2009.129]

Corresponding author

Register with J-STAGE for free!