3D printed glass: Surface finish and bulk properties as a function of the printing process

Susanne Klein, Michael P. Avery, Robert Richardson, Paul Bartlett, Regina Frei, Steve Simske

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

4 Citations (Scopus)

Abstract

It is impossible to print glass directly from a melt, layer by layer. Glass is not only very sensitive to temperature gradients between different layers but also to the cooling process. To achieve a glass state the melt, has to be cooled rapidly to avoid crystallization of the material and then annealed to remove cooling induced stress. In 3D-printing of glass the objects are shaped at room temperature and then fired. The material properties of the final objects are crucially dependent on the frit size of the glass powder used during shaping, the chemical formula of the binder and the firing procedure. For frit sizes below 250 μm, we seem to find a constant volume of pores of less than 5%. Decreasing frit size leads to an increase in the number of pores which then leads to an increase of opacity. The two different binders, 2-hydroxyethyl cellulose and carboxymethylcellulose sodium salt, generate very different porosities. The porosity of samples with 2-hydroxyethyl cellulose is similar to frit-only samples, whereas carboxymethylcellulose sodium salt creates a glass foam. The surface finish is determined by the material the glass comes into contact with during firing.

Original languageEnglish
Title of host publicationProceedings of SPIE-IS and T Electronic Imaging - Measuring, Modeling, and Reproducing Material Appearance 2015
PublisherSociety of Photo-Optical Instrumentation Engineers (SPIE)
Volume9398
ISBN (Print)9781628414882
DOIs
Publication statusPublished - 2015
EventMeasuring, Modeling, and Reproducing Material Appearance 2015 - San Francisco, United States
Duration: 9 Feb 201510 Feb 2015

Conference

ConferenceMeasuring, Modeling, and Reproducing Material Appearance 2015
CountryUnited States
CitySan Francisco
Period9/02/1510/02/15

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