ELASTIC NONLINEARITY OF AEROGELS

被引：65

作者：

GROSS, J ^{[1
]}

FRICKE, J ^{[1
]}

PEKALA, RW ^{[1
]}

HRUBESH, LW ^{[1
]}

机构：

[1] LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94550

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.45.12774

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the sound propagation in SiO2 aerogels and three types of organic aerogels: resorcinol formaldehyde, melamine formaldehyde, and vitreous carbon. The main parameter determining the sound velocity is the aerogel density; however, the bond strength and cross linking also influence the stiffness of these materials. Furthermore, we show that at least two types of low-density aerogels become less stiff and consequently the sound velocity is lowered when the specimens are uniaxially compressed. We explain this in terms of a model for the internal structure.

引用

页码：12774 / 12777

页数：4

共 16 条

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