Synthesis of carbon nitride crystals at high pressures and temperatures

被引：32

作者：

He, DW

Zhang, FX

Zhang, XY

Qin, ZC

Zhan, M

Liu, RP

Xu, YF

Wang, WK

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China

[2] Yan Shan Univ, Qinhuandao 006604, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH | 1998年 / 13卷 / 12期

关键词：

D O I：

10.1557/JMR.1998.0471

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Carbon nitride crystals have been synthesized from C3N4H4 in the presence of a nickel-based alloy or cobalt as a catalyst at high pressure of 7 GPa and temperature of about 1400 degrees C. Scanning electron microscopy showed rod-like, well-faceted crystals with size of several micrometers, and the N content in these carbon nitride crystals was 47-62%, X-ray diffraction indicated the crystals were composed of alpha-C3N4 and beta-C3N4. The experimental lattice constants of alpha-C3N4 (a = 6.425 Angstrom, c = 4.715 Angstrom) and beta-C3N4 (a = 6.419 Angstrom, c = 2.425 Angstrom) agree with ab initio calculations very well.

引用

页码：3458 / 3462

页数：5

共 14 条

[1] Composition of SiCN crystals consisting of a predominantly carbon-nitride network [J].