Dielectric spectroscopy of PETG/TiO2 composite intended for 3D printing

0584164 - ÚFP 2024 RIV GB eng J - Journal Article
Veselý, P. - Froš, D. - Hudec, T. - Sedláček, J. - Ctibor, Pavel - Dušek, K.
Dielectric spectroscopy of PETG/TiO2 composite intended for 3D printing.
Virtual and Physical Prototyping. Roč. 18, č. 1 (2023), č. článku e2170253. ISSN 1745-2759. E-ISSN 1745-2767
Institutional support: RVO:61389021
Keywords : 3D printing * fused deposition modelling * polyethylene terephthalate glycol-modified * polymer-ceramic composite * titanium dioxide
OECD category: Materials engineering
Impact factor: 10.6, year: 2022
Method of publishing: Open access
https://www.tandfonline.com/doi/full/10.1080/17452759.2023.2170253

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.
Permanent Link: https://hdl.handle.net/11104/0352148