Paper Title:
Formation Mechanism of Nano AlN Powder by Gas-Reduction-Nitridation
  Abstract

AlN powders were synthesized by gas-reduction- nitridation of γ-Al2O3 powders using NH3 and C3H8 as reactant gases. AlN was identified from the products that synthesized at 1100-1400 oC for 120 min in the NH3-C3H8 gas flow, and it was confirmed that AlN can be easily fabricated by the gas-reduction-nitridation of γ-Al2O3. The products synthesized at 1100oC for 120min contained unreacted γ-Al2O3. By the 27A1 MAS NMR spectra, Al-N bonding in the product increased with an increase in the nitridation ratio of the tetrahedral AlO4 shoulder which decreased prior to that of the octahedral AlO6 shoulder. It seems that γ-Al2O3 was preferentially nitrided from AlO4 rather than AlO6. AlN nano particles were easily converted directly from γ -Al2O3 at a low temperature because the AlO4 within γ-Al2O3was preferentially nitrided.

  Info
Periodical
Key Engineering Materials (Volumes 317-318)
Edited by
T. Ohji, T. Sekino and K. Niihara
Pages
215-218
DOI
10.4028/www.scientific.net/KEM.317-318.215
Citation
T. Yamakawa, J. Tatami, T. Wakihara, K. Komeya, T. Meguro, K. MacKenzie, "Formation Mechanism of Nano AlN Powder by Gas-Reduction-Nitridation", Key Engineering Materials, Vols. 317-318, pp. 215-218, 2006
Online since
August 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Shan Zheng, Lian Gao, Hiroshi Watanabe, Junichi Tatami, Toru Wakihara, Katsutoshi Komeya, Takeshi Meguro
Abstract:Dense and homogenous Si3N4-TiN composites (5 vol% TiN) were prepared by using in situ synthesis method from Si3N4, AlN and TiO2 mixtures,...
115
Authors: Rosa Maria da Rocha, Francisco Cristóvão Lourenço de Melo
Abstract:The effect of three different sintering additive systems on densification of boron carbide powder was investigated. The sintering additives...
170
Authors: Zhong Qi Shi, Wan Li Yang, Guan Jun Qiao, Jian Feng Yang, Zhi Hao Jin
Abstract:Flower-like AlN microstructure with many cone-like petals was prepared by combustion synthesis assisted with a mechanical activation (MA)...
413
Authors: Bei Yue Ma, Bo Li, Yu Shi Ding, Chen Yan, Ying Li, Yao Shu
Chapter 2: Biochemical Materials, Environmental Materials and Chemistry Processing
Abstract:The latest development on preparation of SiC-AlN, SiC-mullite and β-Sialon materials using fly ash via in-situ carbothermal reduction process...
280
Authors: Zhuo Li, Jiu Xin Jiang, Yan Ping Wei, Ming Yan, Yan Lin Chen, Ying Chang
Chapter 1: Materials Engineering and Materials Processing
Abstract:A very simple synthesis method of AlN-SiC solid solution powder, i.e. self-combustion of Al, Si3N4 and C mixture in the...
39