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Electromechanical properties of ternary BiFeO3−0.35BaTiO3–BiGaO3 piezoelectric ceramics
Journal of Electroceramics ( IF 1.7 ) Pub Date : 2018-12-07 , DOI: 10.1007/s10832-018-0169-3
Fazli Akram , Rizwan Ahmed Malik , Salman Ali Khan , Ali Hussain , Soonil Lee , Myang-Hwan Lee , Choi Hai In , Tae-Kwon Song , Won-Jeong Kim , Yeon Soo Sung , Myong-Ho Kim

In the present work, composition dependent crystal structure, ferroelectric, piezoelectric, and temperature dependent dielectric properties of the BiGaO3-modified (1–x)(0.65Bi1.05FeO3–0.35BaTiO3) (BFBT35–xBG, where x = 0.00–0.03) lead-free ceramics were systematically investigated by solid-state reaction method, followed by water quenching process. The substitution of BG successfully diffuses into the lattice of the BFBT ceramics, without changing the pseudo-cubic structure of the samples. The scanning electron microscopy (SEM) results revealed that the average grain size was increased with BG-content in BFBT system. The BFBT–xBG ceramics showed a maximum in permittivity (ɛmax) at temperatures (Tmax) above 500 °C in the compositional range of 0.00 ≤ x ≤ 0.03. The electro-strain is measured to be 0.125% (d*33 ~ 250 pm/V) under unipolar fields (5 kV/mm) for BFBT–0.01BG ceramics. The same composition (x = 0.01), large static piezoelectric constant (d33 ~ 165 pC/N) and electromechanical coupling factor (kp ~ 25%) were obtained. The above investigated characterizations suggests that BFBT–BG material is favorable for piezoelectric and high temperature applications.



中文翻译:

三元BiFeO的机电性能3−0.35钡钛3–BiGaO3 压电陶瓷

在当前的工作中,BiGaO 3改性的(1- x)(0.65Bi 1.05 FeO 3 –0.35BaTiO 3)(BFBT35- x BG )的成分依赖的晶体结构,铁电,压电和温度依赖的介电性能(x  = 0.00-0.03)通过固态反应方法,然后进行水淬工艺对无铅陶瓷进行了系统的研究。BG的取代成功地扩散到了BFBT陶瓷的晶格中,而没有改变样品的伪立方结构。扫描电子显微镜(SEM)结果表明,BFBT体系中平均晶粒尺寸随BG含量的增加而增加。BFBT – xBG陶瓷显示出介电常数(ɛ最大值最大值)在温度(Ť最大值高于500℃)中的0.00≤组成范围 X  ≤0.03。电应变被测量为0.125%(d * 33下单极字段(5千伏/毫米),用于BFBT-0.01BG陶瓷〜250点/ V)。相同的组成(X  = 0.01),大的静态压电常数(d 33〜165 PC / N)和机电耦合系数(ķ p得到〜25%)。上述研究表明,BFBT-BG材料非常适合压电和高温应用。

更新日期:2018-12-07
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