AC conductivity and dielectric behavior in mixed electronic-ionic 30Li(2)O-4MoO(3)-(66-x)TeO2-xV(2)O(5) glass system

作者：Hisam Rosdiyana; Yahya Ahmad Kamal^*; Kamari Halimah Mohamed; Talib Zainal Abidin

来源：Ionics, 2017, 23(6): 1423-1437.

DOI：10.1007/s11581-017-1973-5

• Glasses
• Dielectric properties
• Electrical conductivity
• Mixed ionic-electronic effect

AC conductivity, dielectric property, and electric modulus formalism of lithium molybdenum tellurite glasses containing vanadium with compositions 30Li(2)O-4MoO(3)-(66-x)TeO2-xV(2)O(5) (x = 0.2, 0.4, 0.6, 0.8, 1.0, and 1.2) have been studied in the frequency range 10(-2) Hz to 1 MHz and temperature range 323-413 K to investigate the effects of mixed ionic-electronic carriers in the glasses. The variation of AC conductivity with V2O5 showed a nonlinear increase for x <= 0.6 mol% before decreasing to a minimum at 0.8 mol% V2O5. The decrease in sigma (AC) attributed to some forms of blocking effect on Li+ ions caused by the mixed ionic-electronic (MIE) effect. Meanwhile, dielectric constant showed a general increase for x <= 0.6 before an anomalous decrease at x = 0.8 mol% V2O5, which was followed by a large increase at x > 0.8 mol%. The decrease at x = 0.8 mol% coincided with the sigma(AC) drop at the same location. This decrease was also suggested related to the MIE that induced a blocking effect, which caused the restricted dipole movement.

• 出版日期2017-6