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Functionally Graded Ceramic Structures by Direct Thermal Inkjet Printing

P. Gingter, A.M. Wätjen, M. Kramer, R. Telle

Journal of Ceramic Science and Technology, Vol. 6, No. 2 (2015), pp. 119-124

DOI: 10.4416/JCST2014-00033

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Abstract

Aqueous inks based on fine alumina and zirconia powder (3Y-TZP) with a solids content of 21 vol% were developed and adapted to a direct inkjet printing (DIP) system by optimizing the solids content, surface tension and viscosity of the inks. Using different thermal printheads for alumina and 3Y-TZP ink, dispersion ceramics and functionally graded materials (FGM) were generated via precise dropwise combination of materials on a substrate. Green and sintered specimens feature high density and accuracy with regard to drop positioning, which underlines the high potential of DIP for the fabrication of functionally graded ceramic structures.

Keywords

Direct inkjet printing, suspensions, functionally graded materials, ZrO2, Al2O3

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