Composite samples of YBa2Cu3O7-x (Y-123) and linear low density polyethylene (LLDPE) are prepared using Y-123 as filler. The electrical and magnetic properties and microstructure of these composites are presented. Although these composites do not show zero resistivity, the intrinsic diamagnetic properties of the superconducting materials are preserved in the composites and there is no change in the transition temperature of the superconductor. Scanning electron microscopy (SEM) studies indicated a systematic variation in the microstructure in terms of the pores present and the extent of the intergrain contacts of the Y-123 filler.
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