规则结晶形态氮化铝颗粒的自蔓延高温合成

无机材料学报

规则结晶形态氮化铝颗粒的自蔓延高温合成

傅仁利¹; 陈克新²; 周和平²; 费雷拉J.M.F³

1. 南京航空航天大学材料科学与技术学院, 南京 210016; 2. 清华大学新型陶瓷与精细工艺国家重点实验室, 北京 100084; 3. 葡萄牙阿威罗大学玻璃与陶瓷工程系; 阿威罗 3810-193

收稿日期:2003-10-29 修回日期:2003-12-30 出版日期:2004-11-20 网络出版日期:2004-11-20

Highly Crystalline AlN Particles Synthesised by SHS Method

FU Ren-Li¹; CHEN Ke-Xin²; ZHOU He-Ping²; Ferreira J. M. F³

1.College of Materials Science and Engineering; Nanjing University of Aeronautics and Astronautics; Nanjing 210016; China; 2.The State Key Laboratory of New Ceramics and Fine Processing; Tsinghua University; Beijing 100084, China; 3.Department of Ceramics and Glass Engineering; University of Aveiro; CICECO; 3810-193; Aveiro; Portugal

Received:2003-10-29 Revised:2003-12-30 Published:2004-11-20 Online:2004-11-20

摘要/Abstract

摘要： 以铝粉和AlN粉末为原料,按重量比60/40的比例进行混合,加入3wt％NH₄F和3wt％碳黑,在8MPa的氮气气氛条件下进行高温自蔓延合成,合成产物为具有良好结晶形态的规则AlN颗粒.采用扫描电子显微镜(SEM)和X射线衍射仪(XRD)研究了加入NH₄F和碳黑后合成产物形态和物相的变化情况.研究结果表明同时加入NH₄F和碳黑使得燃烧过程出现了后烧现象,即样品可以维持在高温阶段较长的时间,促进了AlN气相的传输,最终使得AlN颗粒以较为规则的外形生长.

关键词: 氮化铝, 自蔓延高温合成, 规则结晶, 颗粒

Abstract: Aluminium nitride (AlN) powders were prepared by self-propagating high-temperature synthesis (SHS). Aluminium
and AlN powder mixtures with weight ratios of about 60/40, in the presence of 3wt% NH₄F and 3wt% carbon powders were ignited in a
nitrogen atmosphere of 8 MPa, resulting in highly crystalline AlN particles with regular hexagonal morphology. The microstructure development during the
reaction and the influence of additives of NH₄F and carbon were determined by SEM/EDS and XRD analysis of the resulting products. For the samples with
NH₄F and carbon, the combustion temperature could be kept on a high level for longer times compared to the sample without NH₄F and carbon. This
indicates that an after-burning phenomenon has occurred; Carbon apparently enhances vapour transport through a mechanism that involves reduction and
then removal of the surface oxide layer of the particles during after-burning.

Key words: aluminium nitride, self-propagation high-temperature synthesis, highly crystalline microstructure, particles

中图分类号:

TB32
TQ174

傅仁利,陈克新,周和平,费雷拉J.M.F. 规则结晶形态氮化铝颗粒的自蔓延高温合成[J]. 无机材料学报.

FU Ren-Li,CHEN Ke-Xin,ZHOU He-Ping,Ferreira J. M. F. Highly Crystalline AlN Particles Synthesised by SHS Method[J]. Journal of Inorganic Materials.

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