Publication detail

Dispersing agent DISPERBYK® as a tool for ensuring low viscosity and kinetic stability during 3D printing of highly filled ceramic suspensions

SOKOLA, P. KALINA, M.

Original Title

Dispersing agent DISPERBYK® as a tool for ensuring low viscosity and kinetic stability during 3D printing of highly filled ceramic suspensions

Type

abstract

Language

English

Original Abstract

Digital Light Processing (DLP), also called microstereolithography, is an additive technology used to print hotocurable parts (traditionally containing photocurable resin) layer by layer using UV light. The efficiency when using DLP printing of ceramic materials depends on many parameters such as exposure time, layer thickness or dynamic viscosity of the printed medium, which should not exceed the limit of 3 Pa∙s at a shear rate of 10 s-1. Ceramic suspensions for DLP printing contain ceramic powder (with suitable properties such as a small specific surface and suitable sinterability) and a photocurable resin. If filling with ceramics occurs, highly filled suspensions have a viscosity that is too high for successful DLP printing. Therefore, different types of dispersing agents are used, such as Disperbyk, Triton or stearic acid, which act as surfactants. Furthermore, in addition to reducing the viscosity value, the given agents should effectively prevent particle agglomeration and phase separation (flocculation). In the presented work, zirconia suspensions (filling 30 vol.%) with two types of Disperbyk reagent (specifically Disperbyk - 103 and Disperbyk - 111) were investigated, while reagents were compared on the basis of dynamic viscosity values, FTIR spectrometry, particle size analysis and kinetic stability using a unique method of valuating the ideal concentration of the reagent on the LUMiSizer analytical centrifuge. By comparing both reagents using all the above analyses of suspensions containing ZrO2, Disperbyk - 103 was evaluated as a more effective reagent. To confirm the correctness of the analysis of the suspensions, zirconia ceramics samples were printed on a 3D printer Original Prusa and subsequently sintered objects were analyzed by scanning electron microscope, their Vickers hardness, density and porosity were determined.

Keywords

suspension, zirconia ceramics, LumiSizer

Authors

SOKOLA, P.; KALINA, M.

Released

30. 11. 2023

Publisher

Vysoké učení technické v Brně, Fakulta chemická

Location

Brno

ISBN

978-80-214-6204-5

Book

Studentská odborná konference Chemie je život 2023 - sborník abstraktů

Edition

1

Edition number

1

Pages from

93

Pages to

93

Pages count

1

URL

https://www.fch.vut.cz/vav/konference/sok/vystupy/sbornik-abstraktu-2023-na-web-pdf-p251584

BibTex

@misc{BUT187686,
  author="Patrik {Sokola} and Michal {Kalina}",
  title="Dispersing agent DISPERBYK® as a tool for ensuring low viscosity and kinetic stability during 3D printing of highly filled ceramic suspensions",
  booktitle="Studentská odborná konference Chemie je život 2023 - sborník abstraktů",
  year="2023",
  series="1",
  edition="1",
  pages="93--93",
  publisher="Vysoké učení technické v Brně, Fakulta chemická",
  address="Brno",
  isbn="978-80-214-6204-5",
  url="https://www.fch.vut.cz/vav/konference/sok/vystupy/sbornik-abstraktu-2023-na-web-pdf-p251584",
  note="abstract"
}