@article{Yang2024, 
author = {Jian Yang and Weijie Han and Huibing Li and Qiming Chen and Wentao Xu and Youfu Zhou and Maochun Hong},
title = {Novel synthesis of fine γ-AlON powders from the hydrolysis of Al metal},
year = {2024},
journal = {Journal of Advanced Ceramics},
volume = {13},
number = {11},
pages = {1872-1880},
keywords = {core–shell structure, hydrolysis, aluminum oxynitride (γ-AlON), Al–H2O reaction},
url = {https://www.sciopen.com/article/10.26599/JAC.2024.9220984},
doi = {10.26599/JAC.2024.9220984},
abstract = {In this study, fine aluminum oxynitride (γ-AlON) powder was synthesized from a solid-state hydrolysis byproduct for the first time through in-depth research on the hydrolysis of metal Al powder. Hydrolysis begins on the surface of the Al particles, the initial solid-state hydrolysis byproduct is AlOOH and then Al(OH)3, and during the reaction stage, a unique core‒shell structure with a hollow outer core composite precursor is formed. Pure-phase AlON powder can be synthesized by utilizing a composite precursor with an appropriate Al2O3/Al ratio (Al2O3/Al = 10.27) under a flowing N2 atmosphere. The core‒shell structure decreases the diffusion distance between raw materials and reduces the nitridation temperature (1700 °C). Furthermore, the unique hollow structure of the composite precursor results in some of the synthesized AlON powder also having a hollow structure, which is conducive to powder crushing, and fine nanoscale (D50 = 292 nm) powder can be obtained only via a grinding process. The combination of Al–H2O reaction and direct nitridation (DN) methods has led to the development of a new synthesis method for AlON powder and provides a new method for the recovery of the solid-state hydrolysis byproduct of metal Al powder.}
}