Growth mechanism of crystalline SiAlON microtubes prepared by combustion synthesis

被引：13

作者：

Liu, Guanghua ^{[1
]}

Chen, Kexin ^{[2
]}

Li, Jiangtao ^{[1
]}

机构：

[1] Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100190, Peoples R China

[2] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

CRYSTENGCOMM | 2012年 / 14卷 / 17期

基金：

中国国家自然科学基金; 北京市自然科学基金;

关键词：

SILICON-NITRIDE CERAMICS; CA-ALPHA-SIALON; MICROSTRUCTURE; ALPHA'-SIALON; PHOSPHORS; LIQUID; PHASE;

D O I：

10.1039/c2ce25525a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Crystalline SiAlON microtubes have been prepared by combustion synthesis, and the growth mechanism of the microtubes is discussed. Two mechanisms are proposed for the formation of the SiAlON microtubes, viz. accumulation of tip concave effect of rod-like crystals and side-by-side coalescence of rod-like crystals. The growth of SiAlON microtubes can be favored by the special reaction condition in combustion synthesis, which is characterized by high reaction temperatures (>1900 degrees C), drastic heating rates (similar to 10(3) degrees C s(-1)), and a high N-2 pressure of 6 MPa. The microtube is a new crystal shape of SiAlON, and an investigation on its formation mechanism increases the knowledge on crystal growth of SiAlON materials.

引用

页码：5585 / 5588

页数：4

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