Properties of Piezoelectric Generators and K0.5Bi0.5TiO3 Films Prepared by Sol-Gel Method

Young-Ho Lee; Sang-Shik Park

doi:10.3740/MRSK.2021.31.11.649

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2021 Vol.31, Issue 11 Preview Page

Properties of Piezoelectric Generators and K_0.5Bi_0.5TiO₃ Films Prepared by Sol-Gel Method 졸-겔법에 의해 제조한 K_0.5Bi_0.5TiO₃ 막과 압전발전기의 특성

November 2021. pp. 649-656

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Abstract

K_0.5Bi_0.5TiO₃ (KBT) thin films were prepared by sol-gel processing for future use in piezoelectric generators. It is believed that the annealing temperature of films plays an important role in the output performance of piezoelectric generators. KBT films prepared on Ni substrates were annealed at 500 ~ 700 °C. Tetragonal KBT films were formed after annealing process. As the annealing temperature increased, the grain size of KBT films increased. KBT thin films show piezoelectric constant (d33) from 23 to 41 pC/N. The increase of grain size in KBT films brought about output voltage and current in the KBT generators. Also, the increase in the displacement of specimens during bending test resulted in increases in output voltage and current. Although KBT generators showed lower output power than those of generators prepared using NBT films, as reported previously, the KBT films prepared by sol-gel method show applicability as piezoelectric thin films for lead-free nanogenerators, along with NBT films.

Keywords

piezoelectric generator

K_0.5Bi_0.5TiO₃

sol-gel

lead free

output voltage

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 31
No :11
Pages :649-656
Received Date : 2021-10-19
Revised Date : 2021-11-15
Accepted Date : 2021-11-15
DOI :https://doi.org/10.3740/MRSK.2021.31.11.649

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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