Compositions of phases in the interaction of rare-earth metals with selenium

被引：5

作者：

Andreev, O. V. ^{[1
]}

Kharitontsev, V. B. ^{[1
]}

Elyshev, A. V. ^{[1
]}

机构：

[1] Tyumen State Univ, Tyumen, Russia

来源：

RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2013年 / 58卷 / 08期

关键词：

Selenium; Selenide; Rare Earth Metal; Self Propagate High Temperature Synthesis; Ytterbium;

D O I：

10.1134/S0036023613080020

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The interaction of rare-earth metals (Pr, Nd, Sm, Y, Er, and Yb) with selenium at Ln: Se = 1: 2, 2: 3, 3: 4, and 1: 1 under polythermal (293-1270 K) and isothermal (770 and 1170 K) heat treatment conditions was studied by differential thermal and X-ray powder diffraction analyses. While heating the reaction mixture, the exothermic events in the interaction between elements occur within the temperature ranges 620-750 K (Pr), 580-870 K (Sm), and 620-920 K (Er). X-ray powder diffraction analysis detected the formation of the following phases in the homogeneous state: at 770 K, LnSe(2) and Yb2Se3, and at 1170 K, Ln(3)Se(4), Ln(2)Se(3), and YbSe. Scanning electron microscopy showed that particles of the selenide phases are formed by 1 x 2-5-mu m fragments, which constitute a spongy structure of agglomerates tens to hundreds of micrometers in size.

引用

页码：910 / 914

页数：5