Speaker
Dr
Seyed Mohammadamin Emami
(Art University of Isfahan)
Description
Glass is a perfect material. It combines clarity and fragility with functionality. From raw material to the objects, all features proved to be done very sensitive. Archaeometrical investigates for reconstructing the technological expertise of ancient civilization became a considerable rise regarding to scientific research disciplines since many years ago. Many objects are studied, due to scientific applied methods for interpreting related technological know-how.
The question regarding to this research will focus on the characterization of the primarily known and excavated glass pieces from Chogha-Zanbil (2500 BC). These samples studied for the first time in chemical point of view in order to determine the chemical composition of these unique samples. Manufacturing process of such materials as experimental workshop in 3rd Millennium BC is the revolutionary aspect of technology in the past in Iranian plateau.
In order to determine the chemical composition of these unique samples, including one piece of ceramics and one piece of metallurgical crucible, the scientists came to ALBA Synchrotron to analyse them using X-Rays Powder Diffraction at the MSPD beamline. The MSPD analysis was carried out on more than 100 points on the glass objects. Synchrotron light enables them to obtain high resolution diffraction patterns, from whose analysis researchers deduced the exact composition of the clay based structure as well as glassy part of the samples. These samples are investigated complimentary with Environmental Scanning Electron Microscope, with energy dispersive X-Ray (ESEM-EDX) in order to have looked on microstructure of these objects.
Based on the analysis different phases are highlighted which would be responsible for the shiny effect and also related to the raw material usage in this period of time. Wollastonite (-ferroan) and Argentotenantite (Ag-exchanged, Silver Aluminum Silicate dehydrated) were predominantly phases which have been qualitatively measured via MSPD. The existences of Ag in the chemical composition of the glasses are one of the highlights which could be also considered in the same time as the reason for shiny effect on the surface.
Author
Dr
Seyed Mohammadamin Emami
(Art University of Isfahan)
Co-authors
Dr
Amir Sayid Hassan Rozatian
(University Isfahan)
Dr
Manijeh Hadian Dehkordi
(Research Centre for Conservation of Cultural Relics)
