Electrically conductive ceramic materials may contribute to innovative solutions for electrical functions under high temperatures and/or chemical aggressive environment. For a successful application, detailed information about temperature dependence of the electrical resistance, charge carrier density or Seebeck coefficient are required. Due to the characteristics of the ceramic materials, the exact measurement of these parameters is associated with numerous problems. Specific modifications of the equipment and the characterization methods are needed. Besides the electrical characterization of metals and ceramics, thermoelectric modules and heating elements can be investigated using application-oriented test equipment.
Measurement of the electrical resistance depending on temperature
The temperature-dependent measurement of the electrical resistance under controlled atmosphere of a tube furnace offers the chance to gather additional information apart from electrical conduction. Oxidation, phase transformations and mechanical cracking can be identified with outstanding sensibility. Even a quantification of these processes may be possible if the indirect information of electrical resistance can be precisely linked to the material alteration. The concept of the measurement compensates undesired influences from contacts and thermal effects.
- Precise analysis of the electrical resistance between 10-4 and 106 Ohm
- Variable arrangement of measurement (4 point or 2 point method)
- Characterization under argon, nitrogen, hydrogen and air atmosphere
- Temperature range from -170 up to 1000 °C