Al-System Non-Oxide Spherical Powder Synthesis by Liquefied Petroleum Gas Firing

Synthesis of non‐oxide materials includes solid‐phase grinding, liquid building‐up, plasma, and CVD. The raw powder of the sintered body is commercialized by solid‐state synthesis; however, it is non‐spherical in shape and its size is below the submicron range. We considered the changes in free ener...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2005-02, Vol.88 (2), p.450-452
Main Authors: Takao, Yasumasa, Sando, Mutsuo
Format: Article
Language:English
Subjects:
Aluminum composites
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Ceramic sintering
Chemical industry and chemicals
Chemical synthesis
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
LPG
Miscellaneous
Powders
Technical ceramics
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Summary:Synthesis of non‐oxide materials includes solid‐phase grinding, liquid building‐up, plasma, and CVD. The raw powder of the sintered body is commercialized by solid‐state synthesis; however, it is non‐spherical in shape and its size is below the submicron range. We considered the changes in free energy of Al, O2, N2, NH3, liquefied petroleum gas (LPG) and focused on the reaction accelerator effect of LPG for Al nitridation or Al2O3 reduction. As a result, we found that, conceptually, some Al nitridation syntheses via LPG firing could occur. The LPG firing method can provide a gas diffusion nitridation mechanism, and can therefore produce Al‐oxynitride (AlON) directly (Al powder did not convert to AlON completely), and AlN spherical powders with diameters above the submicron range.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2005.00062.x