Martha Lilia Domínguez-Patiño

Hyper-Rapid thermal defect annealing during grinding of ZnO powders

We report on the changes in the defect structure of ZnO particles that take place during the grinding of pure ZnO powders and mixtures ZnO–SnO2 and ZnO–TiO2 powders. The qualitative differences in the electron paramagnetic resonance spectra for different specimens were discussed in the context of the hyper-rapid high-temperature spikes created in ZnO particles during mechanical treatment. The thermal spikes cause the defect structure to undergo annealing. The spike duration of the hyper-rapid thermal defects annealing was dependent on the heat conductivity of the ZnO particle environment.