Fabrication and characterization of 3D printing induced orthotropic functional ceramics
Fabrication and characterization of 3D printing induced orthotropic functional ceramics
复制标题
DOI：
10.1088/1361-665x/ab4e0a
复制
发表时间：
2019-12-01
影响因子：
4.1
通讯作者：
Lin, Yirong
中科院分区：
文献类型：
--
作者：
Chavez, Luis A.;Wilburn, Bethany R.;Lin, Yirong
在这项研究中，正交各向异性的功能特性的增材制造陶瓷由于制造工艺的特点。使用粘合剂喷射3D打印制造球形、环境友好的钛酸钡（BaTiO 3）粉末。这些陶瓷的介电和压电性能，其特征在于作为印刷方向的函数。观察到垂直于印刷层测试的样品的介电常数比以平行方式测试的那些高20%。同样，压电响应被发现是超过35%的正常取向。这些结果表明，电极取向对增材制造陶瓷的功能特性有直接影响。总体而言，小于37%的理论密度，平均压电系数为垂直测试陶瓷被发现是152.7 pC N-？1，为理论值的80%。利用这种低密度获得的高压电响应可以导致开发更质量有效和成本有效的感测和能量收集装置，以及可以被调谐以基于所施加的负载的方向进行响应的结构。
The orthotropic functional properties of additively manufactured ceramics due to the fabrication process was characterized in this study. Spherical, environmentally benign barium titanate (BaTiO3) powders were fabricated using binder jetting 3D printing. Dielectric and piezoelectric properties of these ceramics were characterized as a function of the printing orientation. The dielectric constant of the samples tested normal to the printing layers was observed to be 20% higher than those tested in the parallel fashion. Similarly, the piezoelectric response was found to be over 35% in the normal orientation. With these results, it was shown that the electroding orientation has a direct influence on the functional properties of additively manufactured ceramics. Overall, with less than 37% of the theoretical density, the average piezoelectric coefficient for the perpendicularly tested ceramics was found to be 152.7 pC N-?1, which is 80% of the theoretical value. The high piezoelectric response obtained with such low densities can lead to the development of more mass efficient, and cost-effective sensing and energy harvesting devices, as well as structures that can be tuned to respond based on the direction of the loads applied.