Preparation of Porous Ni-Zn Ferrites Using Wood Templates

Abstract

Porous Ni_0.5Zn_0.5ferrite ceramic was prepared using wood template. The wood specimen was treated with ammonia and infiltrated by slurry of nickel nitrate, zinc nitrate and iron (III) and sintered. The products contained mainly ferrite and hematite. The single phase of ferrite formed at 1200℃ for 8h, at 1300℃ for 6h, at 1400℃ for 2h and at 1500℃ for 1 h. The shrinkage of specimen size was obvious when sintered at higher temperature. SEM images confirmed that the sintering at higher temperature promotes the grain growth and at the same time causes the pore size to contract. The microstructure of wood retained.