Nota de FísicaPublicado
Phase Separation and Dynamical Scaling in Borate Glasses
A. Craievich; J.M. Sanchez; E. Williams
1986
Dados da publicação
- Autores
- A. Craievich; J.M. Sanchez; E. Williams
- Tipo
- Nota de Física
- Status
- Publicado
- Data de publicação
- 1986
- Descrição
- Quasi-binary <math>B_2O_3-PbO-(A\ell_2O_3)\,\!</math> glasses of two different compositions and at several temperatures inside the miscibility gap were investigated using small angle x-ray scattering. Measurements were carried out using an x-ray beam from a synchrotron source in pin-hole collimation and the samples were isothermally annealed ''in situ''. The experimentally determined structure function was found to be in general agreement with recently proposed scaling laws. The exponent for the time dependence of the characteristic scaling length was found to change from a minimum value of 0.24 to a maximum of 0.35 for, respectively, samples near the center and near the boundary of the miscibility gap. The time exponent for the maximum of the structure function was found to be nearly equal to three times the exponent of the characteristic length, as expected from the scaling laws. The scaling structure function changes appreciably with composition, becoming considerably sharper near the boundary of the miscibility gap.
- Ano
- 1986
- Número
- CBPF-NF-003/86
- Vínculo com tese
- Não
- Vínculo com bolsa
- Não