Experimental evidence for similar critical behavior of elastic modulus and electric conductivity in porous ceramic materials

被引：16

作者：

Craciun, F

Galassi, C

Roncari, E

机构：

[1] CNR, Ist Acust Om Corbino, I-00189 Rome, Italy

[2] CNR, Ist Ric Tecnol Ceram, I-48018 Faenza, Italy

来源：

EUROPHYSICS LETTERS | 1998年 / 41卷 / 01期

关键词：

D O I：

10.1209/epl/i1998-00115-8

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show experimentally that the elastic modulus of porous ceramics has a critical exponent tau approximately equal to that of conductivity, tau congruent to t congruent to 2. 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.

引用

页码：55 / 60

页数：6

共 46 条

[41]

Stauffer D., 1992, INTRO PERCOLATION TH, V2nd

[42] RAMAN-SCATTERING MEASUREMENTS OF ACOUSTIC SUPERLOCALIZATION IN SILICA AEROGELS [J].