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RESEARCH PAPERS

Effect of Stress on the Dielectric Constant of Alumina

[+] Author and Article Information
Sihai Wen, D. D. Chung

Composite Materials Research Laboratory,  University at Buffalo, The State University of New York, Buffalo, NY 14260-4400

J. Electron. Packag 127(3), 235-236 (Aug 24, 2004) (2 pages) doi:10.1115/1.1939029 History: Received August 24, 2004; Revised August 24, 2004

The relative dielectric constant (10 kHz) of alumina was found to increase reversibly (by up to 13%) with compressive stress (up to 18 MPa). The effect of stress on the relative dielectric constant diminishes with increasing stress, such that it is almost absent when the stress exceeds 7MPa. The relative dielectric constant is higher during loading than subsequent unloading.

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Copyright © 2005 by American Society of Mechanical Engineers
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Figures

Grahic Jump Location
Figure 3

Variation of the relative dielectric constant κ with the compressive stress during the three cycles of stress variation in Fig. 1. First cycle: ν; second cycle: σ; third cycle: 5. In each cycle, κ is higher during loading than subsequent unloading.

Grahic Jump Location
Figure 2

Variation of the resistance with time (solid curve) and of the compressive stress with time (dashed curve) for alumina with silver paint at the electrical contacts

Grahic Jump Location
Figure 1

Variation of the reactance with time (solid curve) and of the compressive stress with time (dashed curve) for alumina with silver paint at the electrical contacts

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