| Issue |
Europhys. Lett.
Volume 41, Number 1, January I 1998
|
|
|---|---|---|
| Page(s) | 55 - 60 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1998-00115-8 | |
| Published online | 01 September 2002 | |
Experimental evidence for similar critical behavior of elastic modulus and electric conductivity in porous ceramic materials
1
Istituto di Acustica "O. M. Corbino”, Consiglio Nazionale
delle Ricerche, via Cassia 1216, I-00189, Rome, Italy
2
Istituto di Ricerche Tecnologiche per la Ceramica, Consiglio Nazionale
delle Ricerche, via Granarolo 64, I-48018, Faenza, Italy
Received:
16
July
1997
Accepted:
18
November
1997
We show experimentally that the elastic modulus of porous ceramics has a
critical exponent τ approximately equal to that of conductivity, 
. This behavior is attributed to the predominance of bond-stretching
over bond-bending contribution to the energy and is related to intrinsic
properties (like ductility or brittleness) of the homogeneous material.
PACS: 77.65.-j – Piezoelectricity and electrostriction / 05.70.Jk – Critical point phenomena
© EDP Sciences, 1998
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