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Discharged Energy Properties of SrO–PbO–Na 2 O–Nb 2 O 5 –SiO 2 Glass‐Ceramics with Different Crystallization Time
Author(s) -
Zhang Qingmeng,
Li Chang,
Liu Hongwei,
Tang Qun,
Liu Jinfeng,
Li Hongtao,
Wang Meng,
Xie Weiping,
Du Jun
Publication year - 2015
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13390
Subject(s) - crystallization , materials science , analytical chemistry (journal) , activation energy , polarization (electrochemistry) , ceramic , hysteresis , mineralogy , thermodynamics , composite material , chemistry , condensed matter physics , physics , chromatography
Discharged energy properties of PbO–SrO–Na 2 O–Nb 2 O 5 –SiO 2 glass‐ceramics with crystallization time from 1 to 1000 min were investigated by measuring their hysteresis loops (described as quasi‐static measuring method) and pulse‐discharge current‐time curves (described as dynamic measuring method). The results show the same trend for both measuring methods: With the increment of crystallization time, the discharged energy density increases gradually, while the energy efficiency decreases. The highest energy efficiencies were obtained in the sample with crystallization time of 1 min, which are 96.3% and 82.4%, corresponding quasi‐static and dynamic measurement, respectively. The reduction of energy efficiency with crystallization time is attributed to combined effect of ferroelectric polarization and interfacial polarization, and part of the corresponding energy could not release in the pulse‐discharge process.