| Autor: |
Erkki Levänen, Teemu Yli-Hallila, S. Seppälä, Matti Vilkko, Matti Järveläinen, Tomi Roinila, Timo Salpavaara |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
IFAC Proceedings Volumes. 47:10012-10017 |
| ISSN: |
1474-6670 |
| DOI: |
10.3182/20140824-6-za-1003.02423 |
| Popis: |
Nondestructively determining pore properties of ceramic materials is essential in many industrial applications. There are several limitations in the existing characterization methods, so new techniques are required to meet the increasing demands of analysis. This paper examines the possible use of an electrical frequency-response method based on broadband excitation and Fourier techniques to characterize porous ceramic materials. The applied method provides a non-destructive, online characterization technique that is fast and can be applied inexpensively. In this article, ceramic samples with three different pore characteristics were measured by the frequency-response method that used a pseudo-random binary sequence. A sample of material was placed between the plates of a capacitor, and the capacitance was measured. Material properties, such as porosity, influence the permittivity value of the material. The samples with different porosities can be distinguished by analyzing the capacitance of the capacitor. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
