April 27, 2023

How do celadon glaze colors develop?

Ceramic glazes have various colors, designs, and appearances. These characteristics may be controlled by varying glaze processing parameters such as initial composition, firing temperature, and firing atmosphere. To have better control of these characteristics and to understand how actual ceramic artifacts were produced, it is necessary to understand how the colors, designs, and appearances develop at the atomic level. In our research, we focus on celadon glazes with iron (Fe) and titanium (Ti), and we aim to understand the coloration of celadon glazes in terms of the Fe and Ti structural properties. The glaze colors were characterized using optical spectroscopy and imaging, while the valences and coordination structures were probed using X-ray absorption spectroscopy[C1] . We have found that the glaze surface structural properties do not correlate well with the observed glaze colors. We are now focusing on spatially-resolved measurements to further investigate this finding. We are considering complementary techniques such as Raman spectroscopy and optical scattering measurements in the future to further probe the structural and optical properties of the celadon glazes.

Period of Stay

Date of Departure: 2022/08/16
Date of Return: 2023/02/19

Country and/or City

Osaka, Japan

Visiting Institute, Host, or Meeting

Institute of Laser Engineering, Osaka University

Title of your Presentation

What you learned and achieved during the visit

Prof. Sarukura and Prof. Shimizu of Osaka University are main collaborators of my PhD project. The SOKENDAI Student Dispatch Program has allowed me to learn and obtain results from reflectance spectroscopy and multi-spectral imaging under their supervision. I also had the opportunity to learn other optical characterization techniques including absorption and emission spectroscopies by joining the experiments of colleagues. The program has provided me a fruitful learning and research experience, and I hope the same is true for other SOKENDAI students.

Department of Materials Structure Science，RILLERA Angelo Perez

I am a PhD student under the Department of Materials Structure Science in KEK Photon Factory. Currently, my research is on understanding the coloration of celadon glazes using optical characterization techniques and X-ray absorption spectroscopy. Prior to studying in Japan, I obtained Master’s and Bachelor’s degrees in Physics from the University of the Philippines where I had research experience on high temperature superconductors and buffer layer materials.