Mechanism for Hydrothermal-carbothermal Synthesis of AlN Nanopowders

作     者：FENG Guanzheng YANG Jian ZHOU Du CHEN Qiming XU Wentao ZHOU Youfu 冯关正;杨健;周渡;陈啟明;许文涛;周有福

作者机构：Key Laboratory of Optoelectronic Materials Chemistry and PhysicsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of ChinaFuzhou 350108China University of Chinese Academy of SciencesBeijing 100039China 

基　　金：National Key Research and Development Program of China(2022YFB3708500,2023YFB3611000) Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China(2020ZZ109) 

出 版 物：《无机材料学报》 (Journal of Inorganic Materials)

年 卷 期：2025年第40卷第1期

页      码：104-110,I0009-I0011页

摘      要：Currently,the carbothermal reduction-nitridation(CRN)process is the predominant method for preparing aluminum nitride(AlN)*** AlN powder prepared by CRN process exhibits high purity and excellent sintering activity,it also presents challenges such as the necessity for high reaction temperatures and difficulties in achieving uniform mixing of its raw *** study presents a comprehensive investigation into preparation process of AlN nanopowders using a combination of hydrothermal synthesis and *** the hydrothermal reaction,a homogeneous composite precursor consisting of carbon and boehmite(γ-AlOOH)is synthesized at 200℃using aluminum nitrate as the aluminum source,sucrose as the carbon source,and urea as the *** the hydrothermal process,the precursor develops a core-shell structure,with boehmite tightly coated with carbon(γ-AlOOH@C)due to electrostatic *** with conventional precursor,the hydrothermal hybrid offers many advantages,such as ultrafine particles,uniform particle size distribution,good dispersion,high reactivity,and environmental *** carbon shell enhances thermodynamic stability of γ-Al_(2)O_(3) compared to the corundum phase(α-Al_(2)O_(3))by preventing the loss of the surface area in *** stability enables γ-Al_(2)O_(3) to maintain high reactivity during CRN process,which initiates at 1300℃,and concludes at 1400℃.The underlying mechanisms are substantiated through experiments and thermodynamic *** research provides a robust theoretical and experimental foundation for the hydrothermal combined carbothermal preparation of non-oxide ceramic nanopowders.

主 题 词：aluminum nitride carbothermal reduction-nitridation mechanism hydrothermal synthesis precursor 

学科分类：080801[080801] 0808[工学-自动化类] 08[工学] 0805[工学-能源动力学] 080502[080502] 

核心收录：

D　O　I：10.15541/jim20240279

馆 藏 号：203156693...