硅酸盐学报

溶胶-凝胶和微波碳热还原氮化法合成β-sialon超细粉

作者：付芳贾晓林张海军

单位：郑州大学材料科学与工程学院郑州大学材料科学与工程学院郑州大学高温材料研究所郑州450052 郑州450052 郑州450052

分类号：O613.72

出版年,卷(期):页码：2007,35(3):317-321

DOI：

摘要：

以正硅酸乙酯(tetraethoxysilane,TEOS),硝酸铝,蔗糖等为原料,通过溶胶-凝胶和微波碳热还原氮化法合成了β-sialon超细粉。研究了铝碳摩尔比、温度、埋粉条件、晶种、添加剂等工艺条件对合成β-sialon超细粉的影响。结果表明:铝碳摩尔比显著影响β-sialon超细粉的合成,过量碳有利于形成β-sialon超细粉。1573～1623K为最佳合成温度。埋粉不利于β-sialon超细粉的合成。晶种对β-sialon超细粉的合成没有显著影响,添加剂Fe2O3对反应有明显促进作用。用场发射扫描式电子显微镜观察产物的显微形貌,结果表明:合成β-sialon超细粉的粒度大约为100nm。

β-sialon ultrafine powder was prepared from tetraethoxysilane,aluminum nitrate and sugar by the sol-gel and microwave carbothermal reduction nitridation methods.The influence of molar ratio of Al to C,reaction temperature,silicon carbide powder bed,crystal seeds and addition on the synthesis ofβ-sialon was studied.The results show that the influence of the molar ratio of Al to C is significant and an excess of carbon is positive.1 573—1 623 K is the optimum synthesis temperature.Silicon carbide powder bed is negative for the preparation ofβ-sialon.The effect of crystal seeds was not as obvious as expected.Fe2O3 dramatically enhances the preparation ofβ-sialon.Field emission-scanning electron microscope was used to get the microtopography of the powder.The results show that the crystalline size of the preparedβ-sialon was about 100 nm.

基金项目：

河南省杰出青年科学基金(0512002400)资助项目

作者简介：

参考文献：

[1]ZOU S AHN,HYUNG B LEE.Study of the synthesis of sialon phases from using microwave energy[J].J Mater Sci,1998,33:4255-4259. [2]贾晓林,张海军,陈俊峰,等.溶胶-凝胶还原氮化合成β-sialon超细粉[J].硅酸盐学报,2004,32(8):925-929.JIA Xiaolin,ZHANG Haijun,CHEN Junfeng,et al.J Chin Ceram Soc(in Chinese),2004,32(8):925-929. [3]张广荣,都兴红,张伟民.β′-sialon粉体合成过程中温度的作用[J].无机材料学报,1996,11(1):58-62.ZHANG Guangrong,DU Xinghong,ZHANG Weimin.J Inorg Mater(in Chinese),1996,11(1):58-62. [4]PORADA M,GERDES T,VODEGEL S.Metallorganic and micro-wave processing of cermets[J].Microw Proc Mater,1992,27:205-210. [5]SUTTON W H.Microwave processing of ceramic materials[J].Am Ceram Soc Bull,1989,68(2):376-386. [6]CAPUTO A J,LACKEY W J,STINTON D P.Development of a new,faster process for the fabrication of ceramic fiber-reinforced ceramic composites by chemical vapor infiltration[J].Ceram Eng Sci Proc,19856(7-8):694-706. [7]刘阳,曾令可,尹虹,等.微波合成纳米碳化钛粉体的机理探讨[J].中国陶瓷,2005,41(4):44-46.LIU Yang,ZENG Lingke,YIN Hong,et al.China Ceram(in Chinese),2005,41(4):44-46. [8]EKSTR?MAND T,NYGREN M.Sialon ceramics[J].J Am Ceram Soc,1992,75(2):259-276. [9]山口明良.实用热力学及其在高温陶瓷中的应用[M].张文杰译.武汉:武汉工业大学出版社,1993.127-171.YAMAGUCHI A.Thermodynamics and Its Application for High Tem-perature Ceramics(in Chinese).ZHANG Wenjie transl.Wuhan:Wuhan University of Technology Press,1993.127-171. [10]GUNN D A A.Theoretical evaluation of the stability of sialon-bonded silicon carbide in the blast furnace enviro nment[J].J Eur Ceram Soc,1993,11:35-41. [11]WANG Jun,LI Nan,SHI Caicheng,et al.β-sialon produced by carbon thermal nitriding reaction of bauxite[J].J Univ Sci Technol Beijing,2000,7(3):209-213. [12]李素平.Fe2O3和TiO2等杂质在矾土基sialon转型过程中的变化及作用[D].郑州:高温功能材料研究所,2004.LI Suping.Conversion and influence of Fe2O3and TiO2on the trans-formation of bauxite based sialon(in Chinese,dissertation).Zheng-zhou:High Temperature Ceramics Institute,Zhengzhou University,2004. [13]侯新梅.铝、硅、碳还原剂对合成矾土基sialon的作用及机理探讨[D].郑州:高温功能材料研究所,2004.HOU Xinmei.Effect and mechanism of reducer aluminium,silicon and carbon on synthesising bauxite based sialon(in Chinese,disserta-tion).Zhengzhou:High Temperature Ceramics Institute,Zhengzhou University,2004.

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