Synthesis of Bauxite Based β-SiAlON by Compound Reduction Nitridation

Yan Qin Guo; Hong Xia Li

doi:10.4028/www.scientific.net/AMR.591-593.1026

Paper Titles

Simulational Study on Biaxial Tensile Test of the Envelope Material of Stratospheric Airship
p.1006

Study on Antireflection of TiO₂-SiO₂/SiO₂ Double-Layer Films Prepared by Sol-Gel Method
p.1012

Research on the Relationship between the Impact Explosive Temperature and Mass Ratio of PTFE/Al Reactive Material
p.1017

Summary of Application of Chinese Copper-Clad Aluminum Wire
p.1021

Synthesis of Bauxite Based β-SiAlON by Compound Reduction Nitridation
p.1026

Study on Corrosion Behavior of Various Steels Used by Ocean Wave Energy Equipment
p.1030

Microstructure and Creep Resistance of Mg-(8-12 Wt.%) Zn-(2-6 Wt.%) Al Alloys
p.1034

Finite Element Simulation on Micro-Forging Process Inhibiting Warping of the Thin-Walled Components Treated by Laser Cladding
p.1038

Preparation and Characterization of Polyacrylonitrile-Based Nanofibers by Electrostatic Spinning
p.1042

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 591-593Synthesis of Bauxite Based β-SiAlON by Compound...

Synthesis of Bauxite Based β-SiAlON by Compound Reduction Nitridation

Abstract:

The process of synthesizing bauxite based β-SiAlON by using carbon silicon composite reducing agent was studied. Specimens prepared by mixing bauxite (Al2O3 68%), carbon black and silicon are nitrided at 1100~1550°C for 6h. The mass change ratio of the specimens are determined; Phase composition and microstructure of some specimens are examined by XRD, SEM and EDS. The results are compared with those of specimens using Si and C separately as reducing agent. It is found that at 1100~1200°C only Si reacts with N2 and SiO2 to form Si2N2O; At 1300~1400°C, C takes part in reduction-nitridation with subsequent formation of SiAlON; At 1450~1550°C, there is noticeable increase in β-SiAlON formation, the optimum temperature is 1500°C. The amount of β-SiAlON formed is higher and crystale growth is better than that of single reducing agent.

You might also be interested in these eBooks

Manufacturing Engineering and Automation II

View Preview

Info:

Periodical:

Advanced Materials Research (Volumes 591-593)

Pages:

1026-1029

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.591-593.1026

Citation:

Cite this paper

Online since:

November 2012

Authors:

Yan Qin Guo, Hong Xia Li

Keywords:

Bauxite, Composite Reducing Agent, Reduction-Nitridation Reaction, Β-Sialon

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] ZHONG Xiangchong. Innovative development of high performance new refractory materials [J]. Refractories, 2005, 39: 1-5. (In Chinese).

Google Scholar

[2] LIU Zhongyi, SUN Hongwei, ZHONG Xiangchong. Phase transformations in the process of carbothermal reduction nitridation reaction of Kaolin[J]. Refractories, 2004, 38: 18-20, 24. (In Chinese).

Google Scholar

[3] SUN Hongwei, LIU Zhongyi, ZHONG Xiangchong. Research on phase transitions in synthesizing β-SiAlON from low grade bauxite[J]. Refractories, 2004, 38: 305-308, 323. (In Chinese).

Google Scholar

[4] HOU Xinmei, ZHONG Xiangchong. Investigation on synthesis of SiAlON from bauxite and silicon powder[J]. Refractories, 2005, 39: 333-336. (In Chinese).

Google Scholar

[5] LI Suping, GUO Yanqin, ZHONG Xiangchong. Investigation on synthesis of bauxite β-SiAlON by using aluminum /silicon reducing agent[J]. Non-Metallic Mines, 2008, 31: 15-17. (In Chinese).

Google Scholar