Synthesis of magnesium diboride powder by self-propagating high-temperature

被引：0

作者：

Lu, Huimin ^{[1
,2
,3
]}

Han, Huanqing ^{[2
,4
]}

Wang, Yongheng ^{[2
]}

Qiu, Dingfan ^{[1
]}

Chu, Zhengjun ^{[4
]}

机构：

[1] Beijing Univ Aeronaut & Astronaut, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Light Met Res Inst, Beijing 100083, Peoples R China

[3] Univ Cambridge, Dept Mat Sci Met, Cambridge CB3 3QZ, England

[4] Gen Res Inst Iron & Steel, Beijing 100016, Peoples R China

来源：

MAGNESIUM TECHNOLOGY 2006, PROCEEDINGS | 2006年

基金：

中国国家自然科学基金;

关键词：

MgB2; self-propagating high-temperature synthesis; superconductor; powder;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Self-propagating high-temperature synthesis (SHS) method was used to fabricate MgB2 powder from Mg-B system. In this paper, the reaction process of Mg with B was studied by thermodynamic calculation, X-ray diffract-meter and micro-image analyzer. These results show that the single-phase MgB2 can be synthesized by self-propagating high-temperature synthesis method. When Mg reacts with B, Mg firstly melts and then reacts with B to form MgB2; but if the synthesis temperature is too high, MgB2 can decompose into MgB4 and Mg. These synthesized MgB2 particles appear random geometry and fine crystal grain. At normal pressure, the decomposition temperature of MgB2 is less than 1320K; but higher gas pressure is beneficial to lifting the decomposition temperature of MgB2. And at high temperature, there are these phenomena that MgB2 can also exist or MgB2 directly decomposes into Mg and amorphous B.

引用

页码：355 / +

页数：2