Preparation and Properties of Sintering Additives Coated Si3N4 from Heterogeneous Nucleation Processing

材料科学技术（英文）, 2002, 18(1): 34-36.

^1, , ^2, , ^3,

1.Beijing Vacuum Electronics Research Institute, 100016 Beijing, Chima

2.Beijing Vacuum Electronics Research Institute, 100016 Beijing, Chima

3.Beijing Vacuum Electronics Research Institute, 100016 Beijing, Chima

基金项目: State Key Lab. Of New Ceramics and Fine Processing of Tsinghua University(X.GZ9913)

Preparation and Properties of Sintering Additives Coated Si3N4 from Heterogeneous Nucleation Processing

The sintering additives such as Al2O3 and/or Y2O3 were coated on the surfaces of Si3N4 particles via heterogeneousnucleation processing using a buffered pH solution as the precipitation reagent. They nucleated and grew only onthe surfaces of Si3N4 and did not form sol particles in solution by TEM observation. The isoelectric point (IEP) ofcoated Si3N4 was different from that of as-received Si3N4. The IEP of Al(OH)3-coated Si3N4 occurred at pH8.4,which is close to that of alumina. When Al(OH)3-coated Si3N4 particles were coated with Y(OH)3, the IEP of coatedSi3N4 powder shifted from pH8.4 to pH9.2, similar to that of yttria. In addition, the rheological data showed thatAl2O3 and/or Y2O3 coated Si3N4 suspension is nearly Newtonian and that added Si3N4 suspension shows a shearrate thinning behavior.

参考文献

[1]	H M Jennings .[J].Journal of Materials Science,1983,18:951.
[2]	R E Loehman;D J Rowcliffe .[J].Journal of the American Ceramic Society,1980,63:144.
[3]	O Abe .[J].Journal of Materials Science,1990,25:4018.
[4]	B Djuricic;D McGarry;SPickering .[J].Journal of Materials Science Letters,1993,12:1320.
[5]	E Liden;E Carlstrom;LEklund;B.Nybergand R.Carlsson .[J].Journal of the American Ceramic Society,1995,78:1761.
[6]	G. Ghosh;S. Vaynman;M. E. Fine .Microstructure and ambient properties of a Sialon composite prepared by hot pressing and reactive sintering of β-Si_3N_4 coated with Al_2O_3[J].Journal of Materials Research,1999(3):881-890.
[7]	J Yang;J M F Ferreira.[A].北京,1998:42.
[8]	E P Luther;F F Lange;DSPearson .[J].Journal of the American Ceramic Society,1995,78:2009.
[9]	C M Wang;X L Zhe .[J].Journal of Materials Science Letters,1995,14:129.
[10]	W H Shih;L L Pwu;AATseng .[J].Journal of the American Ceramic Society,1995,78:1252.
[11]	J X Zhang;L Q Gao .[J].Ceramics International,2001,27:143.
[12]	J.L.Yang;Y.Huang;WJSiZPXie;Y.L.Zhang .[J].硅酸盐学报,1997,25:514.
[13]	W J Si;H H Miao .[J].硅酸盐学报,1996,24:241.
[14]	T Y Chen;P Somasundaran .[J].Journal of the American Ceramic Society,1998,81:140.

上一张下一张

计量

下载量()
访问量()

作者相关

在本站搜索
在百度学术搜索
在万方数据库搜索
在CNKI搜索

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网

Preparation and Properties of Sintering Additives Coated Si3N4 from Heterogeneous Nucleation Processing

参考文献