Abstract
The superconduction current of bulk high Tc ceramics has been shown to be greatly influenced by anisotropic grain growth (melt texturing). Melt texturing usually occurs during the sintering process in the presence of a liquid phase. This paper describes the effect of TiO2 additions incorporated on YBa2Cu3O7−x powder via sol‐gel coating. TiO2 additions upto 5 mole% resulted in anisotropic grain growth. Dilatometric measurements showed a lowering of the sintering temperature by ∼200 °C indicating the formation of a liquidus phase below that normally reported for YBa2Cu3O7−x with TiO2 addition. TiO2 additions significantly changed the resistivity and DC susceptibility response of YBa2Cu3O7−x superconductors. Microstructural changes were evaluated using SEM/TEM and EDS analysis.
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