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Jo, Wook
Sustainable Functional Ceramics Lab
Research Interests
  • Lead-free piezoceramics, ultra - low temperature sintering, ferroelectrics, relaxor ferroelectrics, 2D materials, magnetoelectric materials, multiferroics

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무연 완화형/정규 강유전체 복합소재[0.97Bi1/2(Na0.78K0.22)1/2TiO3-0.03LaFeO3]-Bi1/2(Na0.82K0.18)1/2TiO3의 저전계 전계유기 변형 특성 연구

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Title
무연 완화형/정규 강유전체 복합소재[0.97Bi1/2(Na0.78K0.22)1/2TiO3-0.03LaFeO3]-Bi1/2(Na0.82K0.18)1/2TiO3의 저전계 전계유기 변형 특성 연구
Other Titles
Tailoring Low-field Strain Properties of [0.97Bi1/2(Na0.78K0.22)1/2TiO3-0.03LaFeO3]-Bi1/2(Na0.82K0.18)1/2TiO3 Lead-Free Relaxor/Ferroelectric Composites
Author
Hong, Chang-HyoKang, Jin-KyuJo, WookLee, Sae-Shin
Issue Date
2016-06
Publisher
한국전기전자재료학회
Citation
JOURNAL OF THE KOREAN INSTITUTE OF ELELCTRICAL AND ELECTRONIC MATERIAL ENGINEERS, v.29, no.6, pp.342 - 347
Abstract
We investigated the effect of Bi1/2(Na0.82K0.18)1/2TiO3 (BNKT) modification on the ferroelectric and electric-field-induced strain (EFIS) properties of lead-free 0.97Bi1/2(Na0.82K0.18)1/2TiO3-0.03LaFeO3 (BNKTLF) ceramics as a function of BNKT content (x= 0, 0.1, 0.2, 0.3, 0.5, and 1). BNKT-modified BNKTLF powders were synthesized using a conventional solid-state reaction method. As the BNKT content x increased from 0 to 1 the normalized electric-field-induced strain (Smax/Emax) was observed to increase at relatively low fields, i.e., below the poling field. Moreover, BNKTLF-30BNKT showed about 460 pm/V as low as at 3 kV/mm, which is a considerably high value among the lead-free systems reported so far. Consequently, it was confirmed that ceramic-ceramic composite, a mixture of an ergodic relaxor matrix and embedded ferroelectric seeds, is a salient way to make lead-free piezoelectrics practical with enhanced EFIS at low field as well as less hysterical.
URI
https://scholarworks.unist.ac.kr/handle/201301/20607
URL
http://www.koreascience.or.kr/article/ArticleFullRecord.jsp?cn=JJJRCC_2016_v29n6_342&ordernum=5
DOI
10.4313/JKEM.2016.29.6.342
ISSN
1226-7945
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