Citation: Wei Zhou, Di-Wei Zhang, Dong-Sheng Bai, Shu-Jing Li, Xin-Rui Wang. Medium effect on dielectric relaxation behaviors of 4A zeolite bulk dispersion system[J]. Chinese Chemical Letters, ;2015, 26(10): 1255-1258. doi: 10.1016/j.cclet.2015.05.046 shu

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

1.
School of Science, Beijing Technology and Business University, Beijing 100048, China

Corresponding author: Wei Zhou,
Received Date: 7 April 2015
Available Online: 19 May 2015
Fund Project: This work was supported by Beijing Natural Science Foundation (Nos. 2143040, 2144047) (Nos. 2143040, 2144047) and National Natural Science Foundation of China (No. 21301012). (No. CIT & TCD 201504009)

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 (τ_LFR and τ_HFR) of 4A/Wdecreasedmore sharply than 4A/C with increasing temperature. According to the temperature dependence of τ_LFR and τ_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.
- Dielectric relaxation,
- 4A zeolite,
- Medium effect,
- Ion hopping
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沈阳化工大学材料科学与工程学院沈阳 110142