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Title: Influence of bimodal particle distribution on material properties of BaTiO3 fabricated by paste extrusion 3D printing

Journal Article · · Ceramics International

Barium titanate (BaTiO3) is a lead-free piezoelectric ceramic widely used in sensors and actuators applications. However, there are many manufacturing challenges to process BaTiO3 due to the brittle nature of ceramics. Most current sensors based on piezoelectricity are limited to mold shapes or flat 2D structures, which narrow their applications. Paste extrusion (PE) 3D printing technique allows the fabrication of complex geometry ceramics with less design limitations. However, the piezoelectric property of 3D printed ceramics is typically lower than those fabricated using traditional means due to lower density. In this paper, a study to evaluate the influence of bimodal particle distribution on improving density and piezoelectricity of BaTiO3 ceramics fabricated using PE 3D printing is presented. 3D printed and compression pressed samples under the same mixing ratios were compared. The highest packing density was obtained using 50-50% vol. fraction of bimodal particles for both types of samples. A predictive model for packing density was validated by experimental results. The highest piezoelectric coefficient of 350 pC/N was obtained using 50-50% vol. bimodal particle distribution. This piezoelectric coefficient is 40% higher than the monodispersed sample using 100 nm particles with a piezoelectric coefficient of 250 pC/N.

Research Organization:
Univ. of Texas at El Paso, TX (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
NA0003865; FE0027502
OSTI ID:
1958091
Alternate ID(s):
OSTI ID: 1815217
Journal Information:
Ceramics International, Vol. 47, Issue 13; ISSN 0272-8842
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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