Chemical synthesis and microstructure of nanocrystalline RB6 (R = Ce, Eu)

被引：13

作者：

Bao Lihong ^{[1
]}

Wurentuya, B. ^{[1
]}

Wei Wei ^{[1
]}

Li Yingjie ^{[1
]}

Tegus, O. ^{[1
]}

机构：

[1] Inner Mongolia Normal Univ, Coll Phys & Elect Informat, Inner Mongolia Key Lab Phys & Chem Funct Mat, Hohhot 010022, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 617卷

基金：

中国国家自然科学基金;

关键词：

Nanocrystalline; Rare-earth hexaborides; Solid-state reaction; Microstructure; BORON-CARBIDE; SINGLE; EMISSION; ROUTE;

D O I：

10.1016/j.jallcom.2014.06.207

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nanocrystalline RB6 (R = Ce and Eu) have been successfully synthesized by a solid-state reaction of CeO2 and Eu2O3 with NaBH4 at a temperature range of 900-1200 degrees C. Phase composition, grain morphology, microstructure and valence states of RB6 were investigated by using XRD, FESEM, HRTEM and XANES measurements. Results show that all the synthesized hexaborides are composed of single-phase nanoparticles with cubic morphology. The FFT patterns of HRTEM images reveal that the hexaborides have a high crystallinity with CaB6-type cubic structure. The present preparation technique is as a novel and invaluable for the developments of highly crystallized RB6 nanoparticles. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：235 / 239

页数：5

共 33 条

[21] CeB6 electron gun for low-emittance injector [J].