TEM Characterization of ZnO - Bi2O3- Sb2O3 - CoO Ceramics Obtained by Combustion Process

Abstract

Combustion synthesis of homogeneous ZnO, Bi₂O₃. Sb₂O₃. CoO powders from stoichíomelrie mixtures of relevant water-soluble metal nitrates, as cation precursor, and urea as fuel was investigated. Which is an alternative powder producing method whose advantage is its simplicity (one-step reaction), pureness. reactivity and high chemical homogeneity when compared to other methods. The resulting in ZnO, Bi₂O₃ Sb₂O₃. CoO sample characterízed by TEM. SEM showed that the sintering of the particle was initiated resulting and small micro aggregates (5um) The self-sustaining reaction leads to high le temperatures that promote the formation of oxide powders showing characteristics in the electronic ceramic field such as ceramic varistorS.