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Influence Of An Electric Field On Grain Growth And Sintering In Strontium Titanate, Wolfgang Rheinheimer, Fabian Lemke, Michael Hoffman Mar 2016

Influence Of An Electric Field On Grain Growth And Sintering In Strontium Titanate, Wolfgang Rheinheimer, Fabian Lemke, Michael Hoffman

Electric Field Assisted Sintering and Related Phenomena Far From Equilibrium

Within the last five years considerable efforts were done in investigating electric field assisted sintering (flash sintering). However the experiments are hard to control: shrinkage occurs within seconds and the local temperature is undefined due to joule heating. Therefore the present study removes these two parameters by investigating grain growth under electric field in the no-current-case for strontium titanate.

The impact of an electric field on grain growth in strontium titanate is investigated between 1350°C and 1550°C for fields of up to 50V/mm. To prevent joule heating by a current flowing through the material insulating Al2O3 plates separate the electrodes …