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Sains Malaysiana
53(2)(2024): 421-432
http://doi.org/10.17576/jsm-2024-5302-15
Kesan Penggantian Litium
ke atas Struktur, Sifat Fizikal dan Sifat Elektrik terhadap Seramik BCZT
(The Effect of Lithium Substitution on the
Structure, Physical, and Electrical Properties of BCZT Ceramic)
HAZIQAH FADHLINA1,
A. ATIQAH1,*, ZALITA ZAINUDDIN2, NUR SHAKILA OTHMAN2,
SOLEHAH ALI2 & NOR AMALINA2
1Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
2School of Applied Physics, Faculty of Science and Technology, Universiti
Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
Diserahkan: 30
Julai 2023/Diterima: 24 Januari 2024
Abstract
The invention of novel lead-free piezoelectric materials with ABO3 perovskite
structure, based on barium calcium zirconate titanate (BCZT) for application in
various device especially in sensor application. In this work, BCZT with
lithium substitution at the calcium site with composition Ba0.85Ca0.15-xLi2xZr0.1Ti0.9O3 (x = 0.00, 0.03, 0.06, 0.09 and 0.12) were synthesized by using the
conventional, solid state reaction method. The influence of different Li
content on the structure, microstructure, density, and electrical properties
were investigated. The results show that substitution led to the improvement of
the physical and electrical properties of the piezoelectric ceramic materials.
The physical properties show the largest grain size and the highest value of
density, ρ which is 4.158 g/cm3 for x = 0.06. This physical
properties led to the highest value of piezoelectric coefficient, d33, remnant polarisation, Pr and saturated polarization, Ps which are 304.6 pC/N, 3.27 µC/cm2, and 5.54 µC/cm2,
respectively, while the highest dielectric constant, ɛr was 3994 when x = 0.12.
Keywords: BCZT materials; ceramic materials; d33; lead-free piezoelectric
material; lithium substitution; piezoelectric coefficient
Abstrak
Inovasi bahan piezoelektrik bebas plumbum yang berstruktur perovskit ABO3,
berasaskan barium kalsium zirkonat titanat (BCZT) bagi mencipta peranti yang
dapat digunakan secara meluas terutamanya dalam aplikasi sensor. Dalam kajian
ini, BCZT dengan penggantian litium pada tapak kalsium dengan komposisi bahan Ba0.85Ca0.15-xLi2xZr0.1Ti0.9O3 (x = 0.00, 0.03, 0.06, 0.09 dan 0.12) telah disintesis menggunakan kaedah
konvensional, tindak balas keadaan pepejal. Kesan kandungan Li yang berbeza
terhadap struktur, mikrostruktur, ketumpatan dan sifat elektik telah dikaji.
Hasi kajian menunjukkan penggantian Li membawa kepada peningkatan sifat fizikal
dan elektrik bahan seramik piezoelektrik. Sifat fizikal bahan menunjukkan saiz
butiran yang paling besar dan nilai ketumpatan, ρ yang paling
tinggi iaitu 4.158 g/cm3 apabila x = 0.06. Sifat fizikal ini
menyumbang kepada nilai pemalar piezoelektrik, d33,
pengutuban baki, Pr dan pengutuban tepu, Ps yang
tertinggi dengan nilai masing-masing ialah 304.6 pC/N, 3.27µC/cm2 dan 5.54 µC/cm2 manakala bagi pemalar dielektrik, ɛr nilai paling tinggi diperoleh apabila x = 0.12 iaitu 3994.
Kata kunci: Bahan BCZT; bahan piezoelektrik bebas plumbum; bahan seramik; d33;
pemalar piezoelektrik; penggantian litium
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*Pengarang
untuk surat-menyurat; email: a.atiqah@ukm.edu.my
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