Raman Scattering and X-Ray Diffraction Studies on Structural Science in Advanced Ceramics

摘要

Most of ceramics consist of light anion (Oxygen) and heavy cation(s). The position, content, and order-disorder of oxygen in the structure are important keys to deciding their physical and chemical properties. There arc some cases where X-ray diffractometry brings poor information about the oxygen atoms. Thus. Raman scattering has been performed in this study together with X-ray diffraction technique. In situ observation of solid materials at high temperatures is of vital importance. A major difficulty in measuring Raman spectra at high temperatures is that relatively weak Raman scattering is faded in the intense, continuous background due to thermal emission. The effect of the thermal background can be attenuated by using UV excitation of Raman scattering. The results indicate that a UV Raman system can improve the high-temperature limit over 2000 deg C.