title: Effect of copper oxide on the structure of nano-sized Ni(x)Zn(y)Fe2O4 powders prepared by using self-propagating high temperature synthesis.
abstract: Nano-sized Cu(x)Ni(x)Zn(1-x-y)Fe2O4 ferrites were prepared by using self-propagating high-temperature synthesis (SHS) and mechanical ball milling. As oxygen pressure increases and copper content decreases in the initial composition, average combustion temperature and combustion velocity increases in the ranges of 947 to 1150 degrees C and 4.2 to 6.5 mm/sec, respectively. The SHS products were agglomerated crystalline powders in which fine particles were present. The average particle of the pulverized SHS product was about 200 nm. Lattice parameters determined by neutron diffractometry are 8.4125 angstroms for Ni0.38Zn0.62Fe2O4 and a = 8.3540 angstroms for Cu0.29Ni0.28Zn0.43Fe2O4.
authors: Department of Electronic Engineering, Sunmoon University, 100 Kalsan-Ri, Tangjeoung-Myun, Asan, Chungnam 336-840, South Korea.
authors: Sang-Heon
authors: SH
authors: Lee
authors: Yong
authors: Y
authors: Choi
authors: Alexander
authors: A
authors: Pirogov