Title :
AC complex impedance investigation for RuO2-glass composites
Author :
Koo, Bon Keup ; No Kwang Soo ; Kim, Ho Gi
Author_Institution :
Dept. of Mater. Sci. & Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea
fDate :
9/1/1991 12:00:00 AM
Abstract :
As a function of RuO2 volume fraction and heat treatment conditions, the AC complex impedance spectra of RuO2-glass composites were investigated in the frequency range of 1 kHz-13 MHz, and equivalent circuits were analyzed based on the spectra. Because the amount of Ru ion in PbO-B2O3 -SiO2-Al2O3-ZnO system glass increases with increasing reaction temperature and time, the electronic properties of the matrix are changed due to the impurity ion. The samples reacted at low temperature and for short time periods exhibited vertical lines in complex impedance spectra plots, which indicates that the samples consisted of lone capacitor circuits. As the temperature and the time increased, the spectra consisted of semicircle arcs representing RC combination circuits. Because the glass gap distance between RuO2 particles decreases with increasing RuO 2 content, the samples with greater RuO2 content showed the change from a vertical line to semicircle arcs at a lower reaction temperature
Keywords :
equivalent circuits; glass; ruthenium compounds; thick film resistors; 1 kHz to 13 MHz; AC complex impedance spectra; PbO-B2O3-SiO2-Al2O 3-ZnO-RuO2; RC circuits; RuO2 content; RuO2 particles; RuO2 volume fraction; RuO2-glass composites; complex impedance spectra plots; electronic properties; equivalent circuits; frequency range; heat treatment conditions; lone capacitor circuits; reaction temperature; reaction time; Composite materials; Conductivity; Equivalent circuits; Frequency; Glass; Heat treatment; Impedance; Materials science and technology; Student members; Temperature;
Journal_Title :
Components, Hybrids, and Manufacturing Technology, IEEE Transactions on
