en Research Paper Research Paper <span style="font-size:11pt"><span style="text-justify:kashida"><span style="text-kashida:0%"><span style="line-height:150%"><span style="unicode-bidi:embed"><span sans-serif="" style="font-family:Calibri,"><span style="font-size:14.0pt"><span style="line-height:150%"><span new="" roman="" style="font-family:" times="">Glasses in the B_{<span style="color:#252525">2</span>}O_{<span style="color:#252525">3</span>}-Li_{<span style="color:#252525">2 </span>}(O, Cl_{<span style="color:#252525">2</span>}, I_{<span style="color:#252525">2</span>}) system were prepared through the conventional melt-quenching method. Then, the conductivity of the molten and glassy states of these compositions was evaluated. Furthermore, the thermal and crystallization behavior of the glasses was determined using simultaneous thermal analysis (STA) and X-ray diffractometry (XRD). The electrical conductivity of the melts was measured at temperatures ranging from 863 to 973 K, and the activation energy of the samples was calculated using the data obtained from ion conduction in the molten state and found to be in the vicinity of 32 kcal/mol. In glassy states, electrical conductivity was also measured. To determine this property, the electrochemical impedance spectroscopy method (EIS) was used. In the molten state, temperature played an important role in the ion conductivity; however, at lower temperatures, other factors became important. Based on the results, the addition of LiI and LiCl to the B_{<span style="color:#252525">2</span>}O_{<span style="color:#252525">3</span>}-Li_{<span style="color:#252525">2</span>}O base glass system (75 B_{<span style="color:#252525">2</span>}O_{<span style="color:#252525">3</span>}, 10 Li_{<span style="color:#252525">2</span>}O, 7.5 LiI, 7.5 LiCl) (mol%) increases the ionic conductivity of the glass from 3.2 10^{<span style="color:#252525">-8 </span>}S.cm^{<span style="color:#252525">-1</span>} to 1.4 10^{<span style="color:#252525">-7 </span>}S.cm^{<span style="color:#252525">-1</span>} at 300 K.</span></span></span></span></span></span></span></span></span><br> &nbsp; ion conduction in glass melts,activation energy,electrochemical impedance spectroscopy 1 9 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-77-15&slc_lang=en&sid=1 Bijan Eftekhari Yekta beftekhari@iust.ac.ir 1800319475328460018169 1800319475328460018169 Yes Iran University of Science and Technology Omid Banapour Ghafari omid_banapour@metaleng.iust.ac.ir 1800319475328460018170 1800319475328460018170 No Iran University of Science and Technology