Reduction Nitridation Synthesis of Bauxite Based β-SiAlON by Aluminum / Silicon Compound

Article Preview

Abstract:

Study of aluminum / silicon compound reduction nitridation synthesis of bauxite-based β -Sialon reaction process, using mass change ratio of the specimens and XRD, SEM, EDS analysis. The results were compared with the specimens separately using Al and Si reducing agent.The results show that:at 1100 only Al reacts with N2 and SiO2 to form AlN and Si; At 1200~1350°C, Si takes part in reduction-nitridation with subsequent formation of SiAlON;At 1450~1550°C,there is noticeable increase in β-SiAlON formation, the appropriate 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

Info:

Periodical:

Pages:

12-15

Citation:

Online since:

August 2013

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2013 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] ZHONG Xiangchong. Innovative development of high performance new refractory materials [J]. Refractories, 2005, 39: 1~5.

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.

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.

Google Scholar

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

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.

Google Scholar

[6] HOU Xinmei, ZHONG Xiangchong. Process of synthesizing bauxited based β-SiAlON by aluminum thermal reduction-nitridation[J]. Refractories, 2004, 38: 230~233, 237.

Google Scholar