| Launch：2019-07-26 |
* Introduction
Archaeology is a science that reproduces the past. Archaeologists study the production, life and social activities of the ancients through the sites and relics left by ancient human activities. The traditional archaeological method is to search for the relevant historical records or compare with the objects of the same period according to the excavation sites, handwriting, patterns and the texture of the objects. Due to the incompleteness of historical records or the lack of circumstantial evidence, many problems have been brought to traditional archaeological methods. The application of modern physical technology, especially Raman spectroscopy in archaeology, provides scientific methods for archaeologists to understand history. Ancient human activities left ruins, relics, etc. from different fields and side reflects the history of people's transformation of the world, is the study of human history of physical data. For the analysis of historical relics, we need to protect their integrity first. Some of the historic relics are very complex in structure, and some of them have been degraded, which makes it difficult to identify them. Raman spectroscopy is an analytical method to characterize substances at the molecular level. It can not destroy the samples, and the sample demand is small. The detection is fast, sensitive and convenient. Raman spectroscopy has been widely used in archaeological research.
* Application
Micro Raman spectroscopic analysis of Yongle blue and white porcelain pieces in Ming Dynasty
Raman spectra of a piece of Ming Yongle blue and white porcelain were obtained and the following Raman spectra were obtained.
Fig.1 Raman spectra of partially amorphous glazes Fig.2 Raman spectra of black mesh spots on blue and white porcelain Fig.3 Raman spectra of yellow spots on blue and white porcelain
Fig.4 black granular spots on blue and white porcelain Fig.5 Raman spectrum of black streak pattern Fig.6 Raman spectra of white crystals in glaze
Figure 1 shows the correlation between the 500cm-1 peak area and the 1000cm-1 peak area ratio and the firing temperature of porcelain. The Raman spectroscopy of Fig.2 and Fig.3 shows that the proportion of Fe used in the raw material is large. The Raman spectroscopy of Fig.4 shows the crystallization of manganese oxide. The Raman spectroscopy of Fig.6 shows the crystallization of Co3O4. Raman spectroscopy can be used as a molecular level analytical tool to detect the material composition of blue and white porcelain quickly and conveniently.
Raman spectroscopy is a lossless and convenient in situ analysis method, which is suitable for accurate analysis of cultural relics. It is widely used in the detection of corrosive substances in bronze ware, the detection of ancient fresco pigments, and the authenticity identification of ancient jade. The application of Raman spectroscopy in the analysis of cultural relics has expanded the way of Cultural Relics Identification and improved its scientificity and reliability. With the improvement of sensitivity and resolution of Raman spectrometer and the development of portable Raman spectrometer, the application of this technology in archaeology will be more and more popular.
Reference:
Micro Raman spectroscopy of Ming Yongle blue and white porcelain pieces, left bond, etc
