MgCu NANOCRYSTALLINE CERAMIC WITH La3+ AND Y3+ IONIC SUBSTITUTIONS USED AS HUMIDITY SENSOR

摘要

The partial substitution of La and Y for Fe into nanocrystalline Mg0 5Cuo.5Fe20^ compound was studied. The Mg-based ceramics present an attractive set of properties: high electrical resistivity, high Curie temperature and chemical stability. Y3+ and La3T ions affect the structure and magnetic and electric properties of Mg0.5Cu0.5CXt compound. These ions increase the grain size and favour the densification of ceramic. The electrical resistivity decreases with incorporation of La3+ and Y3i ions in Mg_0.5Cu_0.5Fe_2O_4.