Dielectric percolation in ceramic matrix composites

被引：0
|
作者：
Rybyanets, A. N. [1 ]
Shvetsova, N. A. [1 ]
Shvetsov, I. A. [1 ]
Kolpacheva, N. A. [2 ]
机构：
[1] Southern Fed Univ, 194 Stachky Ave, Rostov Na Donu 344090, Russia
[2] Don State Tech Univ, 1 Gagarin Sq, Rostov Na Donu 344000, Russia
来源：
JOURNAL OF ADVANCED DIELECTRICS | 2025年 / 15卷 / 02期
基金：
俄罗斯科学基金会;
关键词：
Ceramic matrix piezocomposites; shrinkage; porosity; dielectric permittivity; finite element modeling; percolation threshold; MICROSTRUCTURE; TECHNOLOGY;
D O I：
10.1142/S2010135X24500176
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
This paper presents the results of an experimental study of the percolation behavior of the complex dielectric constant of ceramic matrix composites (CMC). Samples of piezoactive CMC were obtained by joint sintering of synthesized PZT piezoceramic powder (matrix) and crushed particles of sintered PZT piezoceramics (filler) of different compositions. The experimental dependencies of real and imaginary parts of the complex dielectric constant of CMC on the porosity of piezoceramic matrix and volume content of ceramic filler particles were measured and analyzed. It was shown that the additional porosity of the ceramic matrix resulting from sintering of the CMC masks the dielectric percolation transition, that actually occurs at the volume concentration of ceramic filler close to percolation threshold (V similar to 1/3).
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页数：5
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