Synthesis Process of the Lanthanum Manganite Powders by Mechanical Method

Abstract

In this paper, synthesis of lanthanum manganite powders were examined from starting powder materials by mechanical method using attrition-type milling without any extra heat assistance. Starting materials used were lanthanum oxide powder and manganese oxide powder. Equivalent particle diameters to the specific surface area of them were 300 nm and 35 nm, respectively. By using nanosized particles as starting materials, a part of mixture was rapidly synthesized to lanthanum manganite. Among the milled powders, composite particles in which core particle of lanthanum oxide were coated with nanoparticles of manganese oxide were observed. It was supposed that when composite particles received strong friction force by milling, local temperature at the interface between particles became higher, thus led to the powder synthesis.