Medium effect on dielectric relaxation behaviors of 4A zeolite bulk dispersion system

作者：Zhou, Wei^*; Zhang, Di-Wei; Bai, Dong-Sheng; Li, Shu-Jing; Wang, Xin-Rui

来源：Chinese Chemical Letters, 2015, 26(10): 1255-1258.

DOI：10.1016/j.cclet.2015.05.046

• Dielectric relaxation
• 4A zeolite
• Medium effect
• Ion hopping

Dielectric spectra of 4A zeolite particles bulked in deionized water (4A/W) or cyclohexane (4A/C) were measured respectively under different temperatures, and two dielectric relaxations were found in both of 4A/W and 4A/C. Because of existence of water molecules in pores, both low and high frequency relaxation times (tau(LFR) and tau(HFR)) of 4A/W decreased more sharply than 4A/C with increasing temperature. According to the temperature dependence of tau(LFR) and tau(HFR), the activation energies of Na+ interacting with framework under hydrated and dehydrated environments were calculated respectively, and the original properties of Na+ in dehydrated zeolite were obtained by analyzing the dielectric properties of 4A/C. Furthermore, a transient state of Na+ motion with temperature was found in 4A/C system.

• 出版日期2015-10
• 单位北京工商大学