On the Electric and Dielectric Properties of Some Boro-Lead Sulphate Glasses

• Published in: Glass physics and chemistry 2022-06, Vol.48 (3), p.187-201
• Main Authors: A. A. Atta, H. H. Wahba, Ali. A. Alkathiri, Waly, A. L., Al-hasni, Bushra, Ahmed, E. M.
• Format: Article
• Language: English
• Subjects: Boron oxides; Bulk density; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composites; Dielectric loss; Dielectric properties; Glass; Ion density (concentration); Materials Science; Molar volume; Natural Materials; Oxygen ions; Percolation; Physical Chemistry
• ISSN: 1087-6596; 1608-313X
• DOI: 10.1134/S108765962203004X

— Binary oxide glass system of the composition (100 – x )B 2 O 3 ∙ x PbSO 4 [0 ≤ x ≤ 40] is prepared by the press-quenching technique. The X-ray measurement confirmed the complete amorphous nature of the studied glasses. The values of the bulk density and oxygen ion density shows a continuous increase with increasing of the mol % PbSO 4 , while molar volume values showed some variations as the mol % PbSO 4 increased in the glasses. The electrical conductivities σ dc and σ ac are tested between 303 and 673 kelvin. The dc conductivity, σ dc , is found to follow the Arrhenius equation, with values between 10 –12 and 10 –7 S cm –1 in the whole temperature range. The activation energies are found between 0.44 and 0.76 eV. The ac conductivity, σ ac , is determined at four frequencies 120, 10 3 , 10 4 and 10 5 Hz. σ ac for the studied glasses are fitted using the percolation path approximation mechanism (PPT) in addition to the correlated barrier hopping (CBH) mechanism. Some important parameters are obtained as a result of the fitting to the experimental data by both the PPT and the CBH models. Finally, the dielectric constant ε' and dielectric loss ε'' are studied as a function of temperature.