Dielectric spectroscopy of PETG/TiO2 composite intended for 3D printing. Issue 1 (31st December 2023)

• Record Type: Journal Article
• Authors: Veselý, Petr; Froš, Denis; Hudec, Tomáš; Sedláček, Josef; Ctibor, Pavel; Dušek, Karel
• Is Part Of: Virtual and physical prototyping. Volume 18:Issue 1(2023)
• Publication Date: 2023-12-31
• Subjects: 3D printing -- fused deposition modelling -- polymer-ceramic composite -- polyethylene terephthalate glycol-modified -- titanium dioxide; Rapid prototyping -- Periodicals; Virtual computer systems -- Periodicals; Prototypes, Engineering -- Periodicals; Production engineering -- Periodicals; Design, Industrial -- Periodicals; 670.285
• DOI: 10.1080/17452759.2023.2170253
• Languages: English
• ISSNs: 1745-2759

Abstract

ABSTRACT : 3D-printed electronics belong to new approaches to how to build a complex object with multiple desired functions. For that purpose, materials with specific electric properties are needed: conductors, insulators, magnetics, or dielectrics with high permittivity. However, such materials are not commonly available in the form of filament for fused deposition modelling since the development is still ongoing. This paper describes the electrical properties of PETG-ceramic composite filaments. PETG (polyethylene terephthalate glycol-modified) was filled with titanium dioxide (10 and 20 wt.%) to increase the dielectric constant and, simultaneously, to preserve printing simplicity as the material key advantage. Dielectric spectroscopy and measurement of volume resistivity were performed on printed samples. Relative permittivity increased by 50% for a composite filled with 20 wt.% of ceramic particles ( ϵr = 2.5÷4.4) against pure PETG. Permittivity and dielectric loss exhibited frequency and temperature independence. The prepared composite can be used for dielectric applications in electronics.