Anelastic spectroscopy in potassium aluminum metaphosphate glasses |
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| Affiliation: | 1. UNESP, Grupo de Relaxações Anelásticas, 17.033-360, Bauru, SP, Brazil;2. USP, Instituto de Física de São Carlos, Grupo Crescimento de Cristais e Materiais Cerâmicos, 13560-970 São Carlos, SP, Brazil;1. Departamento de Fisicá, Universidade Estadual de Maringá, Maringá, PR, Brazil;2. Departamento de Fisicá, Universidade Estadual de Maringá, Maringá, PR, Brazil;3. Departamento de Engenharia de Materiais, Vitreous Materials Laboratory, Universidade Federal de São Carlos, São Carlos, SP, Brazil |
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| Abstract: | Anelastic spectroscopy (internal friction and the dynamic modulus) was measured by means of a torsion pendulum at 3–12 Hz, in the range of 100–300 K, for a KAP metaphosphate glass. Two thermally activated internal friction peaks appeared at ∼190 and ∼250 K. These peaks were attributed to the behavior of potassium ions (high temperature) and to hydrogen (low temperature). Dynamic modulus showed a gradual decrease with increasing temperature in the range studied for all compositions. |
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