Ancient Roman nano-technology: Insight into the manufacture of mosaic tesserae opacified by calcium antimonate |
| |
Authors: | Ferdinand Drünert Eleni Palamara Nikolaos Zacharias Lothar Wondraczek Doris Möncke |
| |
Affiliation: | 1. Otto Schott Institute of Materials Research, University of Jena, Fraunhoferstraße 6, D-07743 Jena, Germany;2. Laboratory of Archaeometry, Department of History, Archaeology and Cultural Resources Management, University of the Peloponnese, 24100 Kalamata, Greece;3. Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece;4. Department of Built Environment and Energy Technology, Linnæus University, 351 95 Växjö, Sweden |
| |
Abstract: | Opaque mosaic glass tesserae containing calcium antimonates from Ancient Messene, Greece (1st–4th century CE) were investigated by scanning electron microscopy, Raman spectroscopy and X-ray diffraction. Both trigonal CaSb2O6 and cubic Ca2Sb2O7, with crystallite diameters below 1?μm, were identified as opacifying agents. To better understand ancient technologies, we prepared model glasses that were opacified by crystallisation via a secondary heat treatment, by direct crystallisation during the melting process, or by the addition of pre-reacted calcium antimonate to a base glass. We found that direct crystallisation replicated the antique glass artefacts most accurately.We demonstrated that 0.2?wt% of nucleating agents like TiO2 and SnO2 already exert significant influence on the crystallisation behaviour of calcium antimonates. Secondary scattering centres such as silica and carbonates contribute to the optical appearance. Concurrently, we reproduced opaque white glass ceramics in a reconstructed, wood-fired, Roman-type glass furnace built by Wiesenberg (2014). |
| |
Keywords: | Roman glass mosaics Opacification Calcium antimonate Nucleation |
本文献已被 ScienceDirect 等数据库收录! |
|