In Situ Hyperspectral Raman Imaging: A New Method to Investigate Sintering Processes of Ceramic Material at High-temperature

Applied Sciences

Nadine Böhme¹  Thorsten Geisler¹  Kerstin Hauke¹  Johannes Kehren¹  Sinje Zimmer¹ 

[1] Institut für Geowissenschaften, Universität Bonn, 53115, Bonn, NRW,Germany;

关键词: in situ;    hyperspectral Raman imaging;    sintering;    silicate ceramics;    high-temperature;    CaO-Al₂O₃-SiO₂ system;    grain growth;    solid-solid reactions;    spatially resolved;   

DOI  :  10.3390/app9071310

来源: DOAJ

【 摘 要 】

In the last decades, Raman spectroscopy has become an important tool to identify and investigate minerals, gases, glasses, and organic material at room temperature. In combination with high-temperature and high-pressure devices, however, the in situ investigation of mineral transformation reactions and their kinetics is nowadays also possible. Here, we present a novel approach to in situ studies for the sintering process of silicate ceramics by hyperspectral Raman imaging. This imaging technique allows studying high-temperature solid-solid and/or solid-melt reactions spatially and temporally resolved, and opens up new avenues to study and visualize high-temperature sintering processes in multi-component systems. After describing in detail the methodology, the results of three application examples are presented and discussed. These experiments demonstrate the power of hyperspectral Raman imaging for in situ studies of the mechanism(s) of solid-solid or solid-melt reactions at high-temperature with a micrometer-scale resolution as well as to gain kinetic information from the temperature- and time-dependent growth and breakdown of minerals during isothermal or isochronal sintering.

【 授权许可】

Unknown