High-Temperature Sintering and Polarization Process of Additive Manufacturing Barium Titanate Piezoelectric Ceramics

Abstract

Abstract: In order to improve the comprehensive performance of BaTiO₃ piezoelectric ceramics fabricated by additive manufacturing, the slurry shear thinning characteristics and digital light processing (DLP) forming characteristics of BaTiO₃ piezoelectric ceramics were studied in this paper. The densification mechanism of BaTiO₃ piezoelectric ceramics green body formed by DLP under different sintering temperature conditions was revealed, and the influence of polarization direction on the piezoelectric properties of BaTiO₃ ceramics formed by DLP was explored. The results show that the electrical properties of BaTiO₃ piezoelectric ceramics fabricated by DLP additive manufacturing can be improved to a certain extent by adjusting the high temperature sintering and polarization process. When the sintering temperature is 1 420 ℃ and the holding time is 2 h, the piezoelectric coefficient d₃₃ is the largest, which is 163.4 pC/N. The sample layers are tightly bonded and the grain size is uniform. When the angle between Z axis and polarization direction is changed from 0° to 90°, the relative dielectric constant ε_r and d₃₃ are increased by 29.37 % and 27.01 %, respectively. When the solid content is 80% (mass fraction), the sintering temperature is 1 420 ℃, and the angle between Z axis and polarization direction is 90°, the sample d₃₃ is the largest, reaching 182.4 pC/N.

Key words: piezoelectric ceramics, BaTiO₃, additive manufacturing, digital light processing, sintering, polarization

CLC Number:

TQ174

LIU Kai, LU Chao, HE Junchao, LI Tianyang, SHEN Chunhua, YAN Chunze, SHI Yusheng, SUN Huajun. High-Temperature Sintering and Polarization Process of Additive Manufacturing Barium Titanate Piezoelectric Ceramics[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(5): 1772-1783.

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