Electrical conductivity of Li2Ge7O15crystals doped with Al

被引：3

作者：

Koptiev, M. M. ^{[1
]}

Trubitsyn, M. P. ^{[1
]}

Volnianskii, M. D. ^{[1
]}

Plyaka, S. M. ^{[1
]}

Krivchenko, A. Yu. ^{[1
]}

机构：

[1] Oles Honchar Dnipro Natl Univ, Dept Expt Phys, Lab Act Dielect Crystals, Prosp Gagarina 72, UA-49010 Dnipro, Ukraine

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 2020年 / 700卷 / 01期

关键词：

Doping; ionic conductivity; lithium heptagermanate Li(2)Ge(7)O(15)crystal; NONISOTHERMAL DEVITRIFICATION; PHASE-TRANSITION; GLASS-CERAMICS; TOPOLOGICAL ANALYSIS; IONIC-CONDUCTIVITY; CRYSTAL-CHEMISTRY; LITHIUM; GROWTH;

D O I：

10.1080/15421406.2020.1732547

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Electrical conductivity sigma was studied in single- and polycrystalline lithium heptagermanate Li(2)Ge(7)O(15)doped with Al. In Li2Ge7O15:Al single crystal conductivity demonstrated strong anisotropy. As compared with pure crystal, doping significantly increased conductivity along the structural channels parallel toaandcaxes. The doping effect was interpreted by supposing that Al(3+)substituted for Ge(4+)hosts. Li interstitials (A(Li)) were considered as the defects compensating charge imbalance introduced by the impurity. Heterovalent substitution Al3+(Ge4+) noticeably increased concentration of A(Li)which were mobile enough and contributed to conductivity. Influence of Al doping on sigma was compared for Li(2)Ge(7)O(15)single crystal and polycrystal.

引用

页码：13 / 21

页数：9