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Sains Malaysiana 48(2)(2019): 425–433 http://dx.doi.org/10.17576/jsm-2019-4802-21
Penentuan Parameter Optimum bagi Rawatan Pengutuban
Elektrik ke
atas Seramik-Piezo Barium Titanat (BaTiO3) menggunakan Sistem Buatan Sendiri (Determination of Optimum Parameter for
Electrical Poling Treatment on BaTiO3 Piezo-Ceramic
using Home-Built System) NOR HUWAIDA
BINTI JANIL @ JAMIL1, MOHAMMAD
HAFIZUDDIN
BIN HJ JUMALI1*, ZALITA
BINTI ZAINUDDIN1, IZURA
BINTI IZZUDDIN1 & SOODKHET
POJPRAPAI2 1Pusat Pengajian
Fizik Gunaan,
Fakulti Sains dan
Teknologi, Universiti
Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia 2Pusat Kejuruteraan
Seramik, Institut
Kejuruteraan, Suranaree University
of Technology, Nakhon Ratchasima 30000, Thailand Diserahkan: 18 Julai
2018/Diterima: 9 Oktober
2018 ABSTRAK Kajian ini dijalankan bertujuan untuk menentukan nilai optimum bagi parameter rawatan pengutuban BaTiO3 sebagai
bahan seramik-piezo
dengan menggunakan sistem pengutuban DC buatan sendiri. Tiga parameter pengutuban utama yang telah dikaji adalah medan elektrik (Ep),
suhu (Tp)
dan masa (tp)
rawatan. Fasa tunggal seramik-piezo
BaTiO3 yang stabil
dalam struktur
hablur tetragon berjaya disediakan melalui persinteran keadaan pepejal konvensional. Pemilihan julat Ep dan Tp untuk rawatan pengutuban
masing-masing adalah
berdasarkan ujian awal pengukuran histeresis feroelektrik dan penentuan suhu
Curie, Tc. Keputusan kajian mendapati BaTiO3 mempunyai nilai medan paksaan, Ec yang
kecil (~2.42 kV/cm), pengutuban
baki, Pr ~4.90
μC/cm2 dan pengutuban maksimum, Pm yang
besar (~17.59 μC/cm2)
dengan Tc pada 139°C. Berdasarkan julat parameter kajian, nilai pemalar piezoelektrik,
d33 tertinggi
~190 pC/N diperoleh
dengan magnitud medan elektrik pengutuban iaitu 1.5Ec pada suhu 60°C selama 10 min. Struktur dan morfologi BaTiO3 selepas rawatan pengutuban juga dikaji. Sistem pengutuban yang dibangunkan menyusun semula penjajaran domain secara efektif dan parameter rawatan optimum didapati setanding dengan kajian BaTiO3 lain. Kata kunci:
BaTiO3; feroelektrik; piezoelektrik; seramik bebas plumbum ABSTRACT This study has been conducted
to determine the optimum value for poling treatment parameters of
BaTiO3 as
piezo-ceramic material using a home-built DC poling
system. The three main poling parameters that has
been studied were electric field (Ep), temperature (Tp) and time (tp) treatments. Single phase
BaTiO3 piezo-ceramic
stabilized in tetragonal structure was successfully prepared using
conventional solid-state sintering. The selection range
of Ep and
Tp for
poling treatment were based on prior ferroelectric hysteresis
measurement and determination of Curie temperature, Tc tests,
respectively. The results showed that BaTiO3 has
low coercive field, Ec (~2.42
kV/cm), remanent polarization, Pr ~4.90
μC/cm2 and
large maximum polarization, Pm (~17.59 μC/cm2)
values with Tc of
139°C. Based on the studied parameter ranges, the highest piezoelectric
constant, d33 value
~190 pC/N was obtained with poling electric
field magnitude of 1.5Ec at
60°C for 10 min. Structure and morphology BaTiO3 after
poling treatment were also investigated. Developed poling system
effectively reorient the domain alignments and the optimum
treatment parameters were comparable with other BaTiO3 studies. Keywords: BaTiO3; ferroelectric;
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