AN EXPERIMENTAL STUDY ON HYDRATION OF VARIOUS MAGNESIA RAW MATERIALS

作者：Jastrzebska Ilona^*; Szczerba Jacek; Prorok Ryszard; Sniezek Edyta

来源：Ceramics-Silikaty, 2015, 59(1): 48-58.

• MgO
• Mg(OH)(2)
• Hydration
• Refractories
• Raw materials

Hydration of various commercially available magnesia raw materials were studied under hydrothermal conditions. Raw materials were characterized by XRD, XRF, TG/DTA and SEM/EDS methods. Subsequently, they were subjected to hydration test conducted at temperature of 162 degrees C and presuure of 552 kPa according to ASTM C 554-92 standard. The evolution of phase, microstructure and physicochemical behaviour after hydration test were analysed by XRD, DTA/TG and SEM/EDS. The results showed that presence of the specific secondary phases plays a crucial role in preventing MgO grains against the hydration. Merwinite, monticellite, magnesioferrite and srebrnodolskite were found to constitute protector-like phases that inibit hydration process of magnesia.

• 出版日期2015