Anisotropic Piezoelectric Properties of Porous (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 Ceramics with Oriented Pores through TBA-Based Freeze-Casting Method

Materials

卷:15

Shangyi Liu¹  Junzhan Zhang¹  Ying Zhang¹  Siyu Ge¹  Zhifeng Tian¹  Zongmo Shi¹  Peng Shi²  Honghui Wang² 

[1] College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China;

[2] EMRL, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China;

关键词: BCZT;    freeze casting method;    piezoelectricity;    oriented porous;    anisotropy;   

DOI  :  10.3390/ma15113820

来源: DOAJ

【 摘 要 】

Porous (Ba_0.85Ca_0.15)(Zr_0.1Ti_0.9)O₃ (BCZT) piezoelectric ceramics with an oriented directional hole structure were prepared by using the tertbutyl alcohol (TBA)-based freeze-casting method. The influences of sintering temperatures on the microstructure and piezoelectric properties of porous BCZT ceramics were investigated both perpendicular and parallel to the freezing direction. With the increase in sintering temperatures and the porosities decreased from 58% to 42%, the compressive strength increased from 14.0 MPa to 25.0 MPa. In addition, the d₃₃ value of 407 pC/N for the sample sintered at 1400 °C was obtained parallel to the freezing direction, which was 1.40 times that of the other direction.

【 授权许可】

Unknown