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Title of Journal: Sci China Technol Sci

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Abbravation: Science China Technological Sciences

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SP Science China Press

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DOI

10.1002/jsfa.2740010602

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1869-1900

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Synthesis of polycrystalline γAlON powders by nov

Authors: JingXuan Lei FeiZhong Ma Ying Shi JianJun Xie Wei Hu ZhiWei Shi
Publish Date: 2012/09/07
Volume: 55, Issue: 12, Pages: 3405-3410
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Abstract

The synthesis of polycrystalline aluminum oxynitride AlON powders was investigated by the carbothermal reduction and nitridation CRN of amorphous precursor obtained by wet chemical processing Coprecipitation processing was employed to achieve amorphous precursor from AlNO33 solution dispersed by nanosized carbon particles which was composed of AlOH3 and C particles homogeneously The effects of the content of carbon black pH value and calcination temperature on formation of AlON phase were investigated by means of XRD SEM and TEM respectively It was found that single phase AlON powder could be synthesized when the resultant precursors were calcined at 1750°C for 2 hours under flowing N2 Under optimal additional content of C 56wt the resultant AlON powders exhibited the primary particle size of about 1–3 μm with a specific surface area of 32 m2/g which were superior to that of carbothermal reduction of immediate mixture of γAl2O3/C powders

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