AC CONDUCTION PHENOMENON OF Li2O-WO3-B2O3 GLASSES DOPED WITH V2O5

作者：Rao Linganaboina Srinivasa^*; Veeraiah Nalluri; Rao Tumu Venkatappa

来源：Functional Materials Letters, 2013, 6(3): 1350032.

DOI：10.1142/S179360471350032X

• Glasses
• transition metal ions
• ac conductivity

The glass composition 40Li(2)O5WO(3)-(55 - x)B2O3: xV(2)O(5) for x = 0.2, 0.4, 0.6 and 0.8 is chosen for the present study. The glass samples were synthesized by conventional melt-quenching technique. The dielectric properties such as constant (epsilon'), loss (tan delta) and ac conductivity (sigma(ac)) are carried out as a function of temperature (30-270 degrees C) and frequency (10(2)-10(5) Hz). The glass sample (at x = 0.6) exhibited highest ac conductivity (sigma(ac)) and spreading factor (beta) among all the samples. All glasses exhibited mixed conduction (both electronic and ionic) at high temperatures. The frequency exponent s denotes the ac conduction mechanism is associated with both QMT model (at low temperatures) and CBH model (at high temperatures).

• 出版日期2013-6