Electromechanical Properties of Robocasted Barium Titanate Ceramics
Electromechanical Properties of Robocasted Barium Titanate Ceramics
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DOI：
10.1002/adem.202000325
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发表时间：
2020-06
影响因子：
3.6
通讯作者：
M. Lorenz;Alexander Martin;K. Webber;N. Travitzky
中科院分区：
文献类型：
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作者：
M. Lorenz;Alexander Martin;K. Webber;N. Travitzky
本工作介绍了使用机器铸造和冷等静压（CIP）制造用于机电转导的致密多晶钛酸钡（BaTiO3， BT）。提出了利用CIP作为后处理来消除缺陷，增加机械浇铸件的密度，从而提高压电性能。对于机器铸造，浆料含有50%和52%的卷被开发；由此产生的绿色机器人铸造部件在100和150兆帕的环境下进行cipped。利用该技术，用BT52和CIPed在150 MPa下机械铸造的样品显示出约98%的相对密度，与参考多晶样品相当。此外，机器人铸造零件的压电电荷系数和电压系数均有所增加，分别达到195 pC/N和12 × 10−3 Vm N−1。这些数值与先前的多晶BT研究相当，表明机器人铸造和CIP技术相结合是一种生产3D打印压电传感器的可能方法。
This work presents the fabrication of dense polycrystalline barium titanate (BaTiO3, BT) for electromechanical transduction using robocasting and cold isostatic pressing (CIP). The use of CIP as post‐treatment is proposed to eliminate defects and increase the density of robocasted parts to improve the piezoelectric performance. For robocasting, pastes containing 50 and 52 vol% are developed; the resulting green robocasted parts are CIPed at 100 and 150 MPa. Using this proposed technique, samples robocasted with BT52 and CIPed at 150 MPa display a relative density of ≈98%, comparable with reference polycrystalline samples. In addition, an increase in both the piezoelectric charge and voltage coefficient is observed in robocasted parts, with the values up to 195 pC/N and 12 × 10−3 Vm N−1, respectively. These values, which are comparable with previous studies of polycrystalline BT, indicate that the combined robocasting and CIP technique is a possible method for producing 3D printed piezoelectric sensors.