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A FOUR-PROBE ALTERNATING CURRENT APPARATUS FOR THE HIGH-RESOLUTION CONDUCTIVITY MEASUREMENT OF CERAMIC OXIDES AT HIGH TEMPERATURES.

Author(s) : PLOMP L.

Type of article: Article

Summary

A SIMPLENONBRIDGE FOUR-PROBE ALTERNATING CURRENT APPARATUS HAS BEEN DEVELOPED FOR THE MEASUREMENT OF THE ELECTRICAL RESISTANCES OF CERAMIC OXIDE SAMPLES IN THE RANGE FROM 0.1 MILLIOHM UP TO 1 OHM. USE OF PLATINUM PRESS CONTACTS ENABLES PERFORMANCE UP TO 1,273 K (1,000 DEG C) IN OXIDANT GAS ATMOSPHERES ON PRESSED PELLETS AS WELL AS ON THIN LAYERS ON A SUBSTRATE. THE METHOD ALLOWS FOR HIGH-RESOLUTION MEASUREMENTS, 0.1% OR BETTER, AT LOW MEASURING CURRENTS, TYPICALLY 100 MICROAMPERES, AND IS INSENSITIVE TO NOISE AND ENVIRONMENTAL ELECTROMAGNETIC SIGNALS.

Details

  • Original title: A FOUR-PROBE ALTERNATING CURRENT APPARATUS FOR THE HIGH-RESOLUTION CONDUCTIVITY MEASUREMENT OF CERAMIC OXIDES AT HIGH TEMPERATURES.
  • Record ID : 1991-0998
  • Languages: English
  • Source: Rev. sci. Instrum. - vol. 61 - n. 7
  • Publication date: 1990
  • Document available for consultation in the library of the IIR headquarters only.

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