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Title: Calibration-free electrical conductivity measurements for highly conductive slags

Abstract

This research involves the measurement of the electrical conductivity (K) for the ESR (electroslag remelting) slag (60 wt.% CaF{sub 2} - 20 wt.% CaO - 20 wt.% Al{sub 2}O{sub 3}) used in the decontamination of radioactive stainless steel. The electrical conductivity is measured with an improved high-accuracy-height-differential technique that requires no calibration. This method consists of making continuous AC impedance measurements over several successive depth increments of the coaxial cylindrical electrodes in the ESR slag. The electrical conductivity is then calculated from the slope of the plot of inverse impedance versus the depth of the electrodes in the slag. The improvements on the existing technique include an increased electrochemical cell geometry and the capability of measuring high precision depth increments and the associated impedances. These improvements allow this technique to be used for measuring the electrical conductivity of highly conductive slags such as the ESR slag. The volatilization rate and the volatile species of the ESR slag measured through thermogravimetric (TG) and mass spectroscopy analysis, respectively, reveal that the ESR slag composition essentially remains the same throughout the electrical conductivity experiments.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
755584
Report Number(s):
SAND2000-1096J
TRN: US0003616
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article
Journal Name:
Metallurgical Transactions B
Additional Journal Information:
Other Information: Submitted to Metallurgical Transactions B; PBD: 1 May 2000
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; ELECTRIC CONDUCTIVITY; SLAGS; CALCIUM FLUORIDES; CALCIUM OXIDES; ALUMINIUM OXIDES; MELTING; STAINLESS STEELS; DECONTAMINATION; MEASURING METHODS

Citation Formats

MACDONALD,CHRISTOPHER J., GAO,HUANG, PAL,UDAY B., VAN DEN AVYLE,JAMES A., and MELGAARD,DAVID K. Calibration-free electrical conductivity measurements for highly conductive slags. United States: N. p., 2000. Web.
MACDONALD,CHRISTOPHER J., GAO,HUANG, PAL,UDAY B., VAN DEN AVYLE,JAMES A., & MELGAARD,DAVID K. Calibration-free electrical conductivity measurements for highly conductive slags. United States.
MACDONALD,CHRISTOPHER J., GAO,HUANG, PAL,UDAY B., VAN DEN AVYLE,JAMES A., and MELGAARD,DAVID K. Mon . "Calibration-free electrical conductivity measurements for highly conductive slags". United States. https://www.osti.gov/servlets/purl/755584.
@article{osti_755584,
title = {Calibration-free electrical conductivity measurements for highly conductive slags},
author = {MACDONALD,CHRISTOPHER J. and GAO,HUANG and PAL,UDAY B. and VAN DEN AVYLE,JAMES A. and MELGAARD,DAVID K.},
abstractNote = {This research involves the measurement of the electrical conductivity (K) for the ESR (electroslag remelting) slag (60 wt.% CaF{sub 2} - 20 wt.% CaO - 20 wt.% Al{sub 2}O{sub 3}) used in the decontamination of radioactive stainless steel. The electrical conductivity is measured with an improved high-accuracy-height-differential technique that requires no calibration. This method consists of making continuous AC impedance measurements over several successive depth increments of the coaxial cylindrical electrodes in the ESR slag. The electrical conductivity is then calculated from the slope of the plot of inverse impedance versus the depth of the electrodes in the slag. The improvements on the existing technique include an increased electrochemical cell geometry and the capability of measuring high precision depth increments and the associated impedances. These improvements allow this technique to be used for measuring the electrical conductivity of highly conductive slags such as the ESR slag. The volatilization rate and the volatile species of the ESR slag measured through thermogravimetric (TG) and mass spectroscopy analysis, respectively, reveal that the ESR slag composition essentially remains the same throughout the electrical conductivity experiments.},
doi = {},
journal = {Metallurgical Transactions B},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {5}
}