You are not logged in Total: 7journals, 20,687articles Online
Login / Register
Forgot Login?
Main menuMain menu
What's new
Journal list
Visiting ranking
Phrase ranking
About us
Journal Site
Advanced Search

Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.48  No.9 (2007)  >  pp.2365-2369

<<Previous article Vol.48  No.9 (2007)   pp.2365 - 2369 Next article>>

Substance Flow Analysis of Indium for Flat Panel Displays in Japan

Kenichi Nakajima1), Kazuyo Yokoyama1), Kazuko Nakano2) and Tetsuya Nagasaka1)
1) Graduate School of Environmental Studies, Tohoku University
2) Organization for Research and Development of Innovative Science and Technology (ORDIST), Kansai University

Substance flow analysis (SFA) of indium has been conducted in this study. The purpose of this study is to identify the relevant issues for the development of an efficient indium recycling system by performing SFA of indium supplied for indium-tin oxide (ITO) processing as transparent electrodes, which accounts for 86.9% of the total indium demand. In this study, as part of the development of substance and material flow data, (1) data on the flow of indium was collected and reviewed, (2) the amount of dissipated indium associated with the production of flat-panel displays (FPDs) were estimated and (3) its environmental impact was also assessed.
The major conclusions are (a) 470 t-In is used in ITO for transparent electrodes, out of which 220 t-In is dissipated or potentially dissipated in Japan, and (b) 220 t-In of dissipated indium is equivalent to 11.4 TJ of energy consumption, 0.5×103 t of CO2 emissions, and 1.0×106 t of Total Materials Requirement (TMR).

Material flow analysis, Substance flow analysis, Indium, Indium tin oxide, recycle

Received: April 09, 2007
Accepted: June 13, 2007 , Published online: August 25, 2007
Copyright (c) 2007 The Japan Institute of Metals



Terms of Use | Privacy Policy