A four‐probe ac apparatus for the high‐resolution conductivity measurement of ceramic oxides at high temperatures
| Autor: | J. A. M. van Roosmalen, E.H.P. Cordfunke, A. Booy, L. Plomp |
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| Rok vydání: | 1990 |
| Předmět: |
Materials science
Thin layers business.industry Lanthanum strontium manganite chemistry.chemical_element Substrate (electronics) Conductivity chemistry.chemical_compound chemistry Electrical resistivity and conductivity visual_art Personal computer visual_art.visual_art_medium Optoelectronics Ceramic business Platinum Instrumentation |
| Zdroj: | Review of Scientific Instruments. 61:1949-1953 |
| ISSN: | 1089-7623 0034-6748 |
| DOI: | 10.1063/1.1141121 |
| Popis: | A simple nonbridge four‐probe ac apparatus has been developed for the measurement of the electrical resistances of ceramic oxide samples in the range from 0.1 mΩ up to 1 Ω. Use of platinum press contacts enables performance up to 1000 °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 μA, and is insensitive to noise and environmental electromagnetic signals. The apparatus is relatively inexpensive and can be operated automatically by means of a personal computer. Results on the conductivity of platinum and of mixed lanthanum strontium manganite are given as an example. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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