Open AccessПодвижность ионных носителей заряда в пьезоэлектрических кристаллах Li-=SUB=-2-=/SUB=-B-=SUB=-4-=/SUB=-O-=SUB=-7-=/SUB=-
Author(s) -
Н. И. Сорокин,
Ю. В. Писаревский,
В. В. Гребенев,
V. A. Lomonov
Publication year - 2020
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2020.03.49001.631
Subject(s) - crystal (programming language) , materials science , electrode , conductivity , crystal structure , lithium (medication) , electrical resistivity and conductivity , ion , single crystal , analytical chemistry (journal) , crystallography , chemistry , electrical engineering , medicine , engineering , organic chemistry , chromatography , computer science , programming language , endocrinology
The impedance measurements of Li2B4O7 single crystal with Ag electrodes in the frequency range1-3*107 Hz at room temperature have been made. The Li2B4O7 crystal (sp. gr. I41cd, Z = 8) was oriented along crystallographic axis c. Contributions from the bulk crystal and crystal / electrode boundaries in the impedance hodograph of the Ag | Li2B4O7 | Ag system were selected. The structural mechanism of lithium-ion transport in Li2B4O7 has been discussed. Based on electrophysical and structural data, the conductivity σdc = 2.3 × 10–9 S / cm, carrier mobility (vacancies VLi) μmob = 6 × 10−10 cm2 / sV and their concentration nmob = 2.4 × 1019 cm – 3 (0.14% of the amount of lithium in the crystal lattice) have been determined.