SOME COMMENTS ON THE ALPHA-RELAXATION DYNAMICS OF SUPERCOOLED CAKNO3

被引：47

作者：

FUCHS, M ^{[1
]}

GOTZE, W ^{[1
]}

LATZ, A ^{[1
]}

机构：

[1] MAX PLANCK INST PHYS & ASTROPHYS,W-8000 MUNICH 40,GERMANY

来源：

CHEMICAL PHYSICS | 1990年 / 149卷 / 1-2期

关键词：

D O I：

10.1016/0301-0104(90)80138-N

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The relaxation data for 0.4Ca(NO3)20.6KNO3 obtained for temperatures above 100-degrees-C by ultrasound measurements and by normal as well as by stimulated Brillouin scattering experiments are reanalyzed in order to show that they all obey the time temperature superposition principle with the same Kohlrausch model as master function. The data follow a similar pattern as the neutron scattering results and the molecular dynamics curves obtained for this system. The relaxation rates characterizing the elastic modulus, the neutron scattering law, the electrical conductivity, and the shear stress follow closely a universal curve. The experimental results are shown to be compatible with the mathematical picture of the alpha-relaxation process obtained by the mode coupling theory for supercooled liquid dynamics.

引用

页码：185 / 196

页数：12

共 27 条

[1] SHORT-TIME STRUCTURAL RELAXATION PROCESSES IN LIQUIDS - COMPARISON OF EXPERIMENTAL AND COMPUTER-SIMULATION GLASS TRANSITIONS ON PICOSECOND TIME SCALES [J].

ANGELL, CA ;

TORELL, LM .

JOURNAL OF CHEMICAL PHYSICS, 1983, 78 (02) :937-945

[2]

BOSE R, 1970, PHYS CHEM GLASSES, V11, P117

[3]

BRAWER S, 1985, RELAXATION VISCOUS L

[4] ULTRASONIC AND HYPERSONIC PROPERTIES OF MOLTEN KNO3-CA(NO3)2 MIXTURE [J].

CHENG, LT ;

YAN, YX ;

NELSON, KA .

JOURNAL OF CHEMICAL PHYSICS, 1989, 91 (10) :6052-6061

[5] SHEAR VISCOELASTIC RELAXATION OF A NITRATE MELT [J].

GLOVER, GM ;

MATHESON, AJ .

TRANSACTIONS OF THE FARADAY SOCIETY, 1971, 67 (583) :1960-&

[6] THE GLASS-TRANSITION SINGULARITY [J].

GOTZE, W ;

SJOGREN, L .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1987, 65 (04) :415-427

[7] BETA-RELAXATION NEAR GLASS-TRANSITION SINGULARITIES [J].

GOTZE, W ;

SJOGREN, L .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1989, 1 (26) :4183-4202

[8]

Grimsditch M., 1989, Dynamics of Disordered Materials. Proceedings of the ILL Workshop, P196

[9] ELECTRICAL RELAXATION IN A GLASS-FORMING MOLTEN-SALT [J].

HOWELL, FS ;

BOSE, RA ;

MACEDO, PB ;

MOYNIHAN, CT .

JOURNAL OF PHYSICAL CHEMISTRY, 1974, 78 (06) :639-648

[10] UNIVERSAL DIELECTRIC RESPONSE [J].

JONSCHER, AK .

NATURE, 1977, 267 (5613) :673-679

← 1 2 3 →