Home >

news Help

Publication Information


Title
Japanese: 
English:Experimental Study on Chemical Behaviors of Non-Metal Impurities in Pb, Pb-Bi and Pb-Li by Temperature Programmed Desorption Mass Spectrometer Analysis 
Author
Japanese: 近藤 正聡, 中嶋 結, 田中 照也, 野澤 貴史, 横峯 健彦.  
English: Masatoshi KONDO, Yuu NAKAJIMA, Teruya TANAKA, Takashi NOZAWA, Takehiko YOKOMINE.  
Language English 
Journal/Book name
Japanese: 
English:Plasma and Fusion Research 
Volume, Number, Page Vol. 11       
Published date July 13, 2016 
Publisher
Japanese: 
English:The Japan Society of Plasma Science and Nuclear Fusion Research , Nagoya, Aichi, Japan 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL http://www.jspf.or.jp/PFR/PFR_articles/pfr2016/pfr2016_11-2405076.html
 
DOI https://doi.org/10.1585/pfr.11.2405076
Abstract The chemical behaviors of non-metal impurities such as O2, H2, N2, H2O, CO2 and CO in lead (Pb) metal, lead-bismuth (Pb-Bi) alloy and lead-lithium (Pb-Li) alloys were experimentally investigated by means of temperature programmed desorption mass spectrometer (TPD-MS) analysis. Desorption of H2O and CO2 from the Pb metal and the Pb-Bi alloy was clearly detected by TPD-MS analysis. However, desorption of H2O and CO2 from the Pb-Li alloys was much less than that from the Pb metal and the Pb-Bi alloy, since these molecules are chemically unstable and react with Li in the Pb-Li alloys. Then, oxygen and hydrogen must be dissolved in Pb-Li alloys as they form the chemical compounds of Li (i.e., Li2O, LiOH and LiH). Large desorption of hydrogen from solid Pb-Li alloys by their heating was detected. The possible mechanism for the large desorption of hydrogen from the Pb-Li alloys is based on the decomposition of LiH and Pb-Li-H at high temperature. The chemical behaviors of the non-metal impurities in the Pb-Li alloys was modeled based on the thermodynamic stability. The methodologies for the fabrication of high-purity Pb-Li alloys and the control of the impurity condition are discussed.

©2007 Tokyo Institute of Technology All rights reserved.