Nehal Ali Erfan Abdelwahab
East Carolina University, USA
Title: Systematic study of using iron oxide bearing sintering wastes for hard and soft ferrimagnetic glass ceramics preparation
Biography
Biography: Nehal Ali Erfan Abdelwahab
Abstract
About 25% of iron oxides in the sintering process are wasted. In this paper sintering waste (SW) were used as raw materials for hard and soft magnetic glass ceramics (H-, SMGC). About 71% by wt. of SW was used for preparing SMGC, while ~46% was used for HMGC preparation, Differential thermal analysis revealed one broad exothermic peak at 830ËšC for HMGC and at 803ËšC for SMGC. X-ray diffraction shows crystallization of hematite and Zn-ferrite phases in SW and Zn-ferrite and Ba hexaferrite in SMGC and HMGC respectively. Transmission electron microscope revealed crystallization of nanosize particles > 20nm for SMGC and < 15nm for HMGC. Vibrating scanning magnetometer revealed increasing in saturation magnetization from ~26 emu/g for SW to ~44emu/g for SMGC and decreased to ~12 emu/g for HMGC.