FRACTON DIMENSION OF A MUTUALLY SELF-SIMILAR SERIES OF BASE-CATALYZED AEROGELS

被引：5

作者：

ANGLARET, E

HASMY, A

COURTENS, E

PELOUS, J

VACHER, R

机构：

[1] Laboratoire de Science des Matériaux Vitreux, Université Montpellier II, Montpellier

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1995年 / 186卷

关键词：

D O I：

10.1016/0022-3093(95)00047-X

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：

Mutual self-similarity of a series of base-catalyzed aerogels was established by comparison of small-angle neutron scattering data and numerical simulations. Investigation of phonon-fracton crossover in these samples by Brillouin scattering allowed determination of the fracton dispersion curve. A fracton dimension ($) over bar d = 1.1 +/- 0.1 was obtained. The correlation between the sharpness of the phonon-fracton crossover and the well-defined structure of the materials is discussed.

引用

页码：131 / 136

页数：6

共 19 条

[1] VIBRATIONS OF FRACTALS - DYNAMIC SCALING, CORRELATION-FUNCTIONS AND INELASTIC LIGHT-SCATTERING [J].

ALEXANDER, S ;

COURTENS, E ;

VACHER, R .

PHYSICA A, 1993, 195 (3-4) :286-318

[2]

ALEXANDER S, 1982, J PHYS LETT-PARIS, V43, pL625, DOI 10.1051/jphyslet:019820043017062500

[3] VIBRATIONS OF FRACTALS AND SCATTERING OF LIGHT FROM AEROGELS [J].

ALEXANDER, S .

PHYSICAL REVIEW B, 1989, 40 (11) :7953-7965

[4] INVESTIGATION OF DYNAMICAL SCALING IN A MUTUALLY SELF-SIMILAR SERIES OF BASE-CATALYZED AEROGELS [J].

ANGLARET, E ;

HASMY, A ;

COURTENS, E ;

PELOUS, J ;

VACHER, R .

EUROPHYSICS LETTERS, 1994, 28 (08) :591-596

[5] OBSERVATION OF FRACTONS IN SILICA AEROGELS [J].

COURTENS, E ;

VACHER, R ;

PELOUS, J ;

WOIGNIER, T .

EUROPHYSICS LETTERS, 1988, 6 (03) :245-250

[6] STRUCTURE AND DYNAMICS OF SILICA AEROGELS [J].

COURTENS, E ;

VACHER, R .

PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1992, 65 (02) :347-355

[7] LOW-TEMPERATURE ENERGY EXCITATIONS AND THERMAL-PROPERTIES OF SILICA AEROGELS [J].

DEGOER, AM ;

CALEMCZUK, R ;

SALCE, B ;

BON, J ;

BONJOUR, E ;

MAYNARD, R .

PHYSICAL REVIEW B, 1989, 40 (12) :8327-8335

[8] SMALL-ANGLE NEUTRON-SCATTERING OF AEROGELS - SIMULATIONS AND EXPERIMENTS [J].

HASMY, A ;

FORET, M ;

ANGLARET, E ;

PELOUS, J ;

VACHER, R ;

JULLIEN, R .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1995, 186 :118-130

[9]

HASMY A, 1994, PHYS REV B, V50, P5006

[10] EFFECTIVE-MEDIUM APPROXIMATION FOR A PERCOLATION NETWORK - THE STRUCTURE FACTOR AND THE IOFFE-REGEL CRITERION [J].

POLATSEK, G ;

ENTINWOHLMAN, O .

PHYSICAL REVIEW B, 1988, 37 (13) :7726-7730

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