Effects of starting composition and carbon content on the formation of Ca-α SiAlON powders by carbothermal reduction–nitridation

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概要

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• Ca-α SiAlON powders were prepared at different starting compositions and carbon contents at 1450°C for 2 h in N2 from mixtures of SiO2, Al2O3, CaCO3 and carbon powders by carbothermal reduction–nitridation. Crystalline phases and particle morphology of the products were investigated. With increasing the x value in nominal Ca-α SiAlON compositions CaxSi12−3xAl3xOxN16−x, the number of small hollow spheres decreased and the size of primary grains consisting of the hollow spheres increased. The addition of carbon powder to more than 1.2 times of the necessary stoichiometric value was required to form Ca-α SiAlON hollow spheres composed of ultrafine grains.

著者

• HOTTA Mikinori

  Graduate School of Environment and Information Science, Yokohama National University

• TATAMI Junichi

  Graduate School of Environment and Information Science, Yokohama National University

• KOMEYA Katsutoshi

  Graduate School of Environment and Information Science, Yokohama National University

• MEGURO Takeshi

  Graduate School of Environment and Information Science, Yokohama National University

• CHENG Yi-Bing

  Department of Materials Engineering, Monash University

• Meguro Takeshi

  Graduate School Of Environment And Information Science Yokohama National University

• Hotta Mikinori

  Inst. For Materials Res. Tohoku Univ.

• Komeya Katutoshi

  Graduate School Of Environment And Information Science Yokohama National University

• Kondo K

  Tokyo Inst. Technol. Yokohama Jpn

• Tatami Junichi

  Department Of Artificial Environment And Information Faculty Of Environment And Information Sciences

• Kondo K

  Stanley Electric Co. Ltd. Yokohama Jpn

• Kondo Kazuhiro

  Fujitsu Laboratories Ltd.

• Kondo K

  Fujitsu Laboratories Ltd.

• Cheng Yi-bing

  Department Of Materials Engineering Monash University

• Komeya Katsutoshi

  Graduate School Of Environment And Information Science Yokohama National University

• Tatami Junichi

  Graduate School And Research Institute Of Environment And Information Sciences Yokohama National University

• Meguro Takeshi

  Graduate School and Research Institute of Environment and Information Sciences, Yokohama National University

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