Study on performance regulation of electro-mechanical properties 3D printed BaTiO3/HA porous structure composite ceramic

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-09-19 DOI:10.1016/j.ceramint.2024.09.243

Xin Zhao , Jimin Chen , Yong Zeng

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引用次数: 0

Abstract

BaTiO₃/Ca₁₀(PO₄)₆(OH)₂ composite ceramic is an outstanding representative of piezoelectric biomaterials, with excellent biocompatibility and piezoelectric effect, and has potential applications in the field of bone tissue repair. In this work, vat photopolymerization 3D printing technology was used to fabricate triply periodic minimal surface structure BaTiO₃/Ca₁₀(PO₄)₆(OH)₂ composite ceramic bone tissue scaffolds with different pore sizes and porosity, and their mechanical and electrical properties were studied. First, the ceramic slurry configuration process was optimized to obtain a ceramic slurry with high solid content (45 vol%) and excellent rheological properties. Then the effect of sintering temperature on microstructure, relative density, mechanical properties, and electrical properties is discussed. The results show that when sintering at 1300 °C, the BaTiO₃/Ca₁₀(PO₄)₆(OH)₂ composite ceramic has the highest relative density (99.18 %), the highest compressive strength (44 MPa), large relative dielectric constant (379–389), and low dielectric loss. The polarization electric field strength of the BaTiO₃/Ca₁₀(PO₄)₆(OH)₂ composite ceramic was set to 15 kV/cm through the test of the hysteresis loop. Finally, based on multi-physics coupled finite element simulation, the effects of different porosity and different pore sizes on stress distribution and piezoelectric potential were analyzed, and the relationship between them was explored through experiments. The results show that as the porosity increases and the pore size decreases, the mechanical properties of the scaffold decrease significantly, and its compressive strength ranges between 1.67 and 4.26 MPa; as the porosity increases and the pore size increases, the piezoelectric coefficient (d₃₃) of the scaffold showed a decreasing trend, and its d₃₃ ranged between 2 and 9 pC/N. The mechanical and electrical properties of the scaffold meet the performance requirements of cancellous bone. In summary, this work provides a strategy for the application of customized BaTiO₃/Ca₁₀(PO₄)₆(OH)₂ composite ceramic scaffolds in new-generation orthopedic implants.

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3D 打印 BaTiO3/HA 多孔结构复合陶瓷的机电性能调控研究

BaTiO3/Ca10(PO4)6(OH)2 复合陶瓷是压电生物材料的杰出代表，具有优异的生物相容性和压电效应，在骨组织修复领域具有潜在的应用前景。本研究采用大桶光聚合3D打印技术制备了具有不同孔径和孔隙率的三周期最小表面结构BaTiO3/Ca10(PO4)6(OH)2复合陶瓷骨组织支架，并对其力学性能和电学性能进行了研究。首先，对陶瓷浆料配置工艺进行了优化，以获得固含量高（45 vol%）、流变性能优异的陶瓷浆料。然后讨论了烧结温度对微观结构、相对密度、机械性能和电气性能的影响。结果表明，在 1300 ℃ 烧结时，BaTiO3/Ca10(PO4)6(OH)2 复合陶瓷具有最高的相对密度（99.18%）、最高的抗压强度（44 兆帕）、较大的相对介电常数（379-389）和较低的介电损耗。通过磁滞环测试，BaTiO3/Ca10(PO4)6(OH)2 复合陶瓷的极化电场强度被设定为 15 kV/cm。最后，基于多物理场耦合有限元模拟，分析了不同孔隙率和不同孔径对应力分布和压电势的影响，并通过实验探讨了两者之间的关系。结果表明，随着孔隙率的增加和孔径的减小，支架的力学性能明显下降，其抗压强度在 1.67-4.26 MPa 之间；随着孔隙率的增加和孔径的增大，支架的压电系数（d33）呈下降趋势，其 d33 在 2-9 pC/N 之间。该支架的机械性能和电性能符合松质骨的性能要求。总之，这项研究为定制的 BaTiO3/Ca10(PO4)6(OH)2 复合陶瓷支架在新一代骨科植入物中的应用提供了一种策略。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.