Pengaruh Penambahan SrTiO3 pada Struktur dan Sifat Listrik Bahan Piezoelektrik BNT-BT
DOI:
https://doi.org/10.25077/jfu.3.1.%25p.2014Abstract
Sintesis bahan piezoelektrik BNT-BT dengan menambah SrTiO3 telah dilakukan dengan menggunakan metode solid state reaction. Parameter yang digunakan pada metode ini diantaranya penggerusan selama 4 jam, kompaksi dengan tekanan 5000 psi, kalsinasi selama 1 jam pada suhu 300oC dan sintering pada suhu 1000oC selama 4 jam. Pada penelitian ini dilakukan variasi terhadap persentase SrTiO3 sebesar 2,5%, 5%, 7,5% dan 10%. Sampel dikarakterisasi menggunakan LCR meter dan STA. Hasil karakterisasi LCR menunjukkan pada penambahan 7,5% ST terdapat lonjakan tajam pada nilai konstanta dielektrik yaitu sebesar 3625, begitupun untuk nilai temperatur curienya sebesar 400oC. Hasil karakterisasi STA menunjukkan nilai onset tertinggi yang diindikasi sebagai daerah perubahan fasa dari feroelektrik ke paraelektrik berada pada penambahan 7,5% mol ST. Ini memperkuat kemungkinan bahwa daerah MPB (Morphotropic Phase Boundary) berada pada penambahan 7,5% mol ST untuk bahan BNT-BT-ST.Downloads
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Copyright (c) 2014 Uchi Delfia, Alimin Mahyudin, Syahfandi Ahda
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