Effect of the Initial Time of Polymerization on Texture of Si3N4 Ceramics in a Strong Magnetic Field

被引：0

作者：

Yang Zhigang ^{[1
]}

Yu Jianbo ^{[1
]}

Li Chuanjun ^{[1
]}

Deng Kang ^{[1
]}

Ren Zhongming ^{[1
]}

Wang Qiuliang ^{[2
]}

Dai Yinming ^{[2
]}

Wang Hui ^{[2
]}

机构：

[1] Shanghai Univ, Shanghai 200072, Peoples R China

[2] Chinese Acad Sci, Inst Elect Engn, Beijing 100190, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2015年 / 44卷

关键词：

the initial time of polymerization; gel-casting method; strong magnetic field; silicon nitride; texture; FABRICATION; ALUMINA; ORIENTATION;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The a or b-axis textured Si3N4 ceramics were prepared by a gel-casting method in the magnetic field of 6 T and subsequently pressureless sintering. The effect of the initial time of polymerization on texture formation of Si3N4 ceramics was analyzed. And the effect of sintering temperature on the degree of texture and linear shrinkage anisotropy in samples was studied. The results show that the lotgering orientation factor of textured Si3N4 ceramics increases from 0.47 in 6 min to 0.72 in 15 min when the initial time of polymerization increases. With the further increasing of this time, the degree of texture in sample does not increase. The increasing of sintering temperature promotes the increasing of texture in samples, and consequently shrinkage anisotropy phenomenon of the sample is gradually obvious. During the process of preparing textured ceramics together with the gel-casting method in a strong magnetic field, it is necessary for obtaining the high degree of texture to choose the suitable initial time of polymerization.

引用

页码：286 / 290

页数：5

共 16 条

[1] Crystal orientation of non-magnetic materials by imposition of a high magnetic field [J].